# HG changeset patch
# User duke
# Date 1499274335 -7200
# Node ID edb01c460d4cab21ff0ff13512df7b746efaa0e7
# Parent  6f67b104825cf1a8fe8841b21a7a5187c66f670e# Parent  c12946c8db8d1fef148d68a55319f3c826ad41ba
Merge

diff -r c12946c8db8d -r edb01c460d4c .hgtags-top-repo
--- a/.hgtags-top-repo	Wed Jul 05 19:04:57 2017 +0200
+++ b/.hgtags-top-repo	Wed Jul 05 19:05:35 2017 +0200
@@ -221,3 +221,4 @@
 a1c1e8bf71f354f3aec0214cf13d6668811e021d jdk8-b97
 0d0c983a817bbe8518a5ff201306334a8de267f2 jdk8-b98
 59dc9da813794c924a0383c2a6241af94defdfed jdk8-b99
+d2dcb110e9dbaf9903c05b211df800e78e4b394e jdk8-b100
diff -r c12946c8db8d -r edb01c460d4c corba/.hgtags
--- a/corba/.hgtags	Wed Jul 05 19:04:57 2017 +0200
+++ b/corba/.hgtags	Wed Jul 05 19:05:35 2017 +0200
@@ -221,3 +221,4 @@
 469995a8e97424f450c880606d689bf345277b19 jdk8-b97
 3370fb6146e47a6cc05a213fc213e12fc0a38d07 jdk8-b98
 3f67804ab61303782df57e54989ef5e0e4629beb jdk8-b99
+8d492f1dfd1b131a4c7886ee6b59528609f7e4fe jdk8-b100
diff -r c12946c8db8d -r edb01c460d4c hotspot/.hgtags
--- a/hotspot/.hgtags	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/.hgtags	Wed Jul 05 19:05:35 2017 +0200
@@ -361,3 +361,5 @@
 2b9946e10587f74ef75ae8145bea484df4a2738b hs25-b41
 81b6cb70717c66375846b78bb174594ec3aa998e jdk8-b99
 9f71e36a471ae4a668e08827d33035963ed10c08 hs25-b42
+5787fac72e760c6a5fd9efa113b0c75caf554136 jdk8-b100
+46487ba40ff225654d0c51787ed3839bafcbd9f3 hs25-b43
diff -r c12946c8db8d -r edb01c460d4c hotspot/make/hotspot_version
--- a/hotspot/make/hotspot_version	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/make/hotspot_version	Wed Jul 05 19:05:35 2017 +0200
@@ -35,7 +35,7 @@
 
 HS_MAJOR_VER=25
 HS_MINOR_VER=0
-HS_BUILD_NUMBER=42
+HS_BUILD_NUMBER=43
 
 JDK_MAJOR_VER=1
 JDK_MINOR_VER=8
diff -r c12946c8db8d -r edb01c460d4c hotspot/make/linux/makefiles/vm.make
--- a/hotspot/make/linux/makefiles/vm.make	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/make/linux/makefiles/vm.make	Wed Jul 05 19:05:35 2017 +0200
@@ -212,6 +212,12 @@
 Src_Files_EXCLUDE += \*x86_32\*
 endif
 
+# Alternate vm.make
+# This has to be included here to allow changes to the source
+# directories and excluded files before they are expanded
+# by the definition of Src_Files.
+-include $(HS_ALT_MAKE)/$(Platform_os_family)/makefiles/vm.make
+
 # Locate all source files in the given directory, excluding files in Src_Files_EXCLUDE.
 define findsrc
 	$(notdir $(shell find $(1)/. ! -name . -prune \
@@ -381,4 +387,4 @@
 
 install: install_jvm install_jsig install_saproc
 
-.PHONY: default build install install_jvm $(HS_ALT_MAKE)/$(Platform_os_family)/makefiles/$(BUILDARCH).make
+.PHONY: default build install install_jvm $(HS_ALT_MAKE)/$(Platform_os_family)/makefiles/$(BUILDARCH).make $(HS_ALT_MAKE)/$(Platform_os_family)/makefiles/vm.make
diff -r c12946c8db8d -r edb01c460d4c hotspot/make/windows/makefiles/compile.make
--- a/hotspot/make/windows/makefiles/compile.make	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/make/windows/makefiles/compile.make	Wed Jul 05 19:05:35 2017 +0200
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # This code is free software; you can redistribute it and/or modify it
@@ -110,6 +110,7 @@
 #      1400 is for VS2005
 #      1500 is for VS2008
 #      1600 is for VS2010
+#      1700 is for VS2012
 #    Do not confuse this MSC_VER with the predefined macro _MSC_VER that the
 #    compiler provides, when MSC_VER==1399, _MSC_VER will be 1400.
 #    Normally they are the same, but a pre-release of the VS2005 compilers
@@ -142,6 +143,9 @@
 !if "$(MSC_VER)" == "1600"
 COMPILER_NAME=VS2010
 !endif
+!if "$(MSC_VER)" == "1700"
+COMPILER_NAME=VS2012
+!endif
 !endif
 
 # By default, we do not want to use the debug version of the msvcrt.dll file
@@ -151,9 +155,13 @@
 MS_RUNTIME_OPTION = /MTd /D "_DEBUG"
 !endif
 
+# VS2012 and later won't work with:
+#     /D _STATIC_CPPLIB /D _DISABLE_DEPRECATE_STATIC_CPPLIB
+!if "$(MSC_VER)" < "1700"
 # Always add the _STATIC_CPPLIB flag
 STATIC_CPPLIB_OPTION = /D _STATIC_CPPLIB /D _DISABLE_DEPRECATE_STATIC_CPPLIB
 MS_RUNTIME_OPTION = $(MS_RUNTIME_OPTION) $(STATIC_CPPLIB_OPTION)
+!endif
 CXX_FLAGS=$(CXX_FLAGS) $(MS_RUNTIME_OPTION)
 
 # How /GX option is spelled
@@ -221,6 +229,22 @@
 !endif
 !endif
 
+!if "$(COMPILER_NAME)" == "VS2012"
+PRODUCT_OPT_OPTION   = /O2 /Oy-
+FASTDEBUG_OPT_OPTION = /O2 /Oy-
+DEBUG_OPT_OPTION     = /Od
+GX_OPTION = /EHsc
+LD_FLAGS = /manifest $(LD_FLAGS)
+# Manifest Tool - used in VS2005 and later to adjust manifests stored
+# as resources inside build artifacts.
+!if "x$(MT)" == "x"
+MT=mt.exe
+!endif
+!if "$(BUILDARCH)" == "i486"
+LD_FLAGS = /SAFESEH $(LD_FLAGS)
+!endif
+!endif
+
 # If NO_OPTIMIZATIONS is defined in the environment, turn everything off
 !ifdef NO_OPTIMIZATIONS
 PRODUCT_OPT_OPTION   = $(DEBUG_OPT_OPTION)
diff -r c12946c8db8d -r edb01c460d4c hotspot/make/windows/makefiles/sanity.make
--- a/hotspot/make/windows/makefiles/sanity.make	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/make/windows/makefiles/sanity.make	Wed Jul 05 19:05:35 2017 +0200
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2006, 2012, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2006, 2013, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # This code is free software; you can redistribute it and/or modify it
@@ -27,9 +27,9 @@
 all: checkCL checkLink
 
 checkCL:
-	@ if "$(MSC_VER)" NEQ "1310" if "$(MSC_VER)" NEQ "1399" if "$(MSC_VER)" NEQ "1400" if "$(MSC_VER)" NEQ "1500" if "$(MSC_VER)" NEQ "1600" \
+	@ if "$(MSC_VER)" NEQ "1310" if "$(MSC_VER)" NEQ "1399" if "$(MSC_VER)" NEQ "1400" if "$(MSC_VER)" NEQ "1500" if "$(MSC_VER)" NEQ "1600" if "$(MSC_VER)" NEQ "1700" \
 	echo *** WARNING *** unrecognized cl.exe version $(MSC_VER) ($(RAW_MSC_VER)).  Use FORCE_MSC_VER to override automatic detection.
 
 checkLink:
-	@ if "$(LD_VER)" NEQ "710" if "$(LD_VER)" NEQ "800" if "$(LD_VER)" NEQ "900" if "$(LD_VER)" NEQ "1000" \
+	@ if "$(LD_VER)" NEQ "710" if "$(LD_VER)" NEQ "800" if "$(LD_VER)" NEQ "900" if "$(LD_VER)" NEQ "1000" if "$(LD_VER)" NEQ "1100" \
 	echo *** WARNING *** unrecognized link.exe version $(LD_VER) ($(RAW_LD_VER)).  Use FORCE_LD_VER to override automatic detection.
diff -r c12946c8db8d -r edb01c460d4c hotspot/make/windows/makefiles/vm.make
--- a/hotspot/make/windows/makefiles/vm.make	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/make/windows/makefiles/vm.make	Wed Jul 05 19:05:35 2017 +0200
@@ -132,6 +132,10 @@
 
 !if "$(USE_PRECOMPILED_HEADER)" != "0"
 CXX_USE_PCH=/Fp"vm.pch" /Yu"precompiled.hpp"
+!if "$(COMPILER_NAME)" == "VS2012"
+# VS2012 requires this object file to be listed:
+LD_FLAGS=$(LD_FLAGS) _build_pch_file.obj
+!endif
 !else
 CXX_USE_PCH=$(CXX_DONT_USE_PCH)
 !endif
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/cpu/sparc/vm/frame_sparc.inline.hpp
--- a/hotspot/src/cpu/sparc/vm/frame_sparc.inline.hpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/cpu/sparc/vm/frame_sparc.inline.hpp	Wed Jul 05 19:05:35 2017 +0200
@@ -240,10 +240,10 @@
 #endif // CC_INTERP
 
 
-inline JavaCallWrapper* frame::entry_frame_call_wrapper() const {
+inline JavaCallWrapper** frame::entry_frame_call_wrapper_addr() const {
   // note: adjust this code if the link argument in StubGenerator::call_stub() changes!
   const Argument link = Argument(0, false);
-  return (JavaCallWrapper*)sp()[link.as_in().as_register()->sp_offset_in_saved_window()];
+  return (JavaCallWrapper**)&sp()[link.as_in().as_register()->sp_offset_in_saved_window()];
 }
 
 
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/cpu/x86/vm/frame_x86.inline.hpp
--- a/hotspot/src/cpu/x86/vm/frame_x86.inline.hpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/cpu/x86/vm/frame_x86.inline.hpp	Wed Jul 05 19:05:35 2017 +0200
@@ -272,11 +272,10 @@
 
 // Entry frames
 
-inline JavaCallWrapper* frame::entry_frame_call_wrapper() const {
- return (JavaCallWrapper*)at(entry_frame_call_wrapper_offset);
+inline JavaCallWrapper** frame::entry_frame_call_wrapper_addr() const {
+ return (JavaCallWrapper**)addr_at(entry_frame_call_wrapper_offset);
 }
 
-
 // Compiled frames
 
 inline int frame::local_offset_for_compiler(int local_index, int nof_args, int max_nof_locals, int max_nof_monitors) {
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/cpu/x86/vm/stubGenerator_x86_64.cpp
--- a/hotspot/src/cpu/x86/vm/stubGenerator_x86_64.cpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/cpu/x86/vm/stubGenerator_x86_64.cpp	Wed Jul 05 19:05:35 2017 +0200
@@ -279,7 +279,7 @@
       __ stmxcsr(mxcsr_save);
       __ movl(rax, mxcsr_save);
       __ andl(rax, MXCSR_MASK);    // Only check control and mask bits
-      ExternalAddress mxcsr_std(StubRoutines::x86::mxcsr_std());
+      ExternalAddress mxcsr_std(StubRoutines::addr_mxcsr_std());
       __ cmp32(rax, mxcsr_std);
       __ jcc(Assembler::equal, skip_ldmx);
       __ ldmxcsr(mxcsr_std);
@@ -729,17 +729,18 @@
 
     if (CheckJNICalls) {
       Label ok_ret;
+      ExternalAddress mxcsr_std(StubRoutines::addr_mxcsr_std());
       __ push(rax);
       __ subptr(rsp, wordSize);      // allocate a temp location
       __ stmxcsr(mxcsr_save);
       __ movl(rax, mxcsr_save);
       __ andl(rax, MXCSR_MASK);    // Only check control and mask bits
-      __ cmpl(rax, *(int *)(StubRoutines::x86::mxcsr_std()));
+      __ cmp32(rax, mxcsr_std);
       __ jcc(Assembler::equal, ok_ret);
 
       __ warn("MXCSR changed by native JNI code, use -XX:+RestoreMXCSROnJNICall");
 
-      __ ldmxcsr(ExternalAddress(StubRoutines::x86::mxcsr_std()));
+      __ ldmxcsr(mxcsr_std);
 
       __ bind(ok_ret);
       __ addptr(rsp, wordSize);
@@ -3767,12 +3768,35 @@
     return stub->entry_point();
   }
 
+  void create_control_words() {
+    // Round to nearest, 53-bit mode, exceptions masked
+    StubRoutines::_fpu_cntrl_wrd_std   = 0x027F;
+    // Round to zero, 53-bit mode, exception mased
+    StubRoutines::_fpu_cntrl_wrd_trunc = 0x0D7F;
+    // Round to nearest, 24-bit mode, exceptions masked
+    StubRoutines::_fpu_cntrl_wrd_24    = 0x007F;
+    // Round to nearest, 64-bit mode, exceptions masked
+    StubRoutines::_fpu_cntrl_wrd_64    = 0x037F;
+    // Round to nearest, 64-bit mode, exceptions masked
+    StubRoutines::_mxcsr_std           = 0x1F80;
+    // Note: the following two constants are 80-bit values
+    //       layout is critical for correct loading by FPU.
+    // Bias for strict fp multiply/divide
+    StubRoutines::_fpu_subnormal_bias1[0]= 0x00000000; // 2^(-15360) == 0x03ff 8000 0000 0000 0000
+    StubRoutines::_fpu_subnormal_bias1[1]= 0x80000000;
+    StubRoutines::_fpu_subnormal_bias1[2]= 0x03ff;
+    // Un-Bias for strict fp multiply/divide
+    StubRoutines::_fpu_subnormal_bias2[0]= 0x00000000; // 2^(+15360) == 0x7bff 8000 0000 0000 0000
+    StubRoutines::_fpu_subnormal_bias2[1]= 0x80000000;
+    StubRoutines::_fpu_subnormal_bias2[2]= 0x7bff;
+  }
+
   // Initialization
   void generate_initial() {
     // Generates all stubs and initializes the entry points
 
-    // This platform-specific stub is needed by generate_call_stub()
-    StubRoutines::x86::_mxcsr_std        = generate_fp_mask("mxcsr_std",        0x0000000000001F80);
+    // This platform-specific settings are needed by generate_call_stub()
+    create_control_words();
 
     // entry points that exist in all platforms Note: This is code
     // that could be shared among different platforms - however the
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/cpu/x86/vm/stubRoutines_x86_64.cpp
--- a/hotspot/src/cpu/x86/vm/stubRoutines_x86_64.cpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/cpu/x86/vm/stubRoutines_x86_64.cpp	Wed Jul 05 19:05:35 2017 +0200
@@ -42,4 +42,3 @@
 address StubRoutines::x86::_float_sign_flip = NULL;
 address StubRoutines::x86::_double_sign_mask = NULL;
 address StubRoutines::x86::_double_sign_flip = NULL;
-address StubRoutines::x86::_mxcsr_std = NULL;
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/cpu/x86/vm/stubRoutines_x86_64.hpp
--- a/hotspot/src/cpu/x86/vm/stubRoutines_x86_64.hpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/cpu/x86/vm/stubRoutines_x86_64.hpp	Wed Jul 05 19:05:35 2017 +0200
@@ -52,7 +52,6 @@
   static address _float_sign_flip;
   static address _double_sign_mask;
   static address _double_sign_flip;
-  static address _mxcsr_std;
 
  public:
 
@@ -106,11 +105,6 @@
     return _double_sign_flip;
   }
 
-  static address mxcsr_std()
-  {
-    return _mxcsr_std;
-  }
-
 # include "stubRoutines_x86.hpp"
 
 };
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/os/bsd/vm/attachListener_bsd.cpp
--- a/hotspot/src/os/bsd/vm/attachListener_bsd.cpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/os/bsd/vm/attachListener_bsd.cpp	Wed Jul 05 19:05:35 2017 +0200
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2005, 2012, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2005, 2013, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -437,6 +437,30 @@
   return op;
 }
 
+
+// Performs initialization at vm startup
+// For BSD we remove any stale .java_pid file which could cause
+// an attaching process to think we are ready to receive on the
+// domain socket before we are properly initialized
+
+void AttachListener::vm_start() {
+  char fn[UNIX_PATH_MAX];
+  struct stat64 st;
+  int ret;
+
+  int n = snprintf(fn, UNIX_PATH_MAX, "%s/.java_pid%d",
+           os::get_temp_directory(), os::current_process_id());
+  assert(n < (int)UNIX_PATH_MAX, "java_pid file name buffer overflow");
+
+  RESTARTABLE(::stat64(fn, &st), ret);
+  if (ret == 0) {
+    ret = ::unlink(fn);
+    if (ret == -1) {
+      debug_only(warning("failed to remove stale attach pid file at %s", fn));
+    }
+  }
+}
+
 int AttachListener::pd_init() {
   JavaThread* thread = JavaThread::current();
   ThreadBlockInVM tbivm(thread);
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/os/linux/vm/attachListener_linux.cpp
--- a/hotspot/src/os/linux/vm/attachListener_linux.cpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/os/linux/vm/attachListener_linux.cpp	Wed Jul 05 19:05:35 2017 +0200
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2005, 2013, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -432,6 +432,30 @@
   return op;
 }
 
+
+// Performs initialization at vm startup
+// For Linux we remove any stale .java_pid file which could cause
+// an attaching process to think we are ready to receive on the
+// domain socket before we are properly initialized
+
+void AttachListener::vm_start() {
+  char fn[UNIX_PATH_MAX];
+  struct stat64 st;
+  int ret;
+
+  int n = snprintf(fn, UNIX_PATH_MAX, "%s/.java_pid%d",
+           os::get_temp_directory(), os::current_process_id());
+  assert(n < (int)UNIX_PATH_MAX, "java_pid file name buffer overflow");
+
+  RESTARTABLE(::stat64(fn, &st), ret);
+  if (ret == 0) {
+    ret = ::unlink(fn);
+    if (ret == -1) {
+      debug_only(warning("failed to remove stale attach pid file at %s", fn));
+    }
+  }
+}
+
 int AttachListener::pd_init() {
   JavaThread* thread = JavaThread::current();
   ThreadBlockInVM tbivm(thread);
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/os/linux/vm/jsig.c
--- a/hotspot/src/os/linux/vm/jsig.c	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/os/linux/vm/jsig.c	Wed Jul 05 19:05:35 2017 +0200
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -107,7 +107,7 @@
 
   signal_lock();
 
-  sigused = (MASK(sig) & jvmsigs) != 0;
+  sigused = (sig < MAXSIGNUM) && ((MASK(sig) & jvmsigs) != 0);
   if (jvm_signal_installed && sigused) {
     /* jvm has installed its signal handler for this signal. */
     /* Save the handler. Don't really install it. */
@@ -116,7 +116,7 @@
 
     signal_unlock();
     return oldhandler;
-  } else if (jvm_signal_installing) {
+  } else if (sig < MAXSIGNUM && jvm_signal_installing) {
     /* jvm is installing its signal handlers. Install the new
      * handlers and save the old ones. jvm uses sigaction().
      * Leave the piece here just in case. */
@@ -165,7 +165,7 @@
 
   signal_lock();
 
-  sigused = (MASK(sig) & jvmsigs) != 0;
+  sigused = (sig < MAXSIGNUM) && ((MASK(sig) & jvmsigs) != 0);
   if (jvm_signal_installed && sigused) {
     /* jvm has installed its signal handler for this signal. */
     /* Save the handler. Don't really install it. */
@@ -178,7 +178,7 @@
 
     signal_unlock();
     return 0;
-  } else if (jvm_signal_installing) {
+  } else if (sig < MAXSIGNUM && jvm_signal_installing) {
     /* jvm is installing its signal handlers. Install the new
      * handlers and save the old ones. */
     res = call_os_sigaction(sig, act, &oldAct);
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/os/posix/vm/os_posix.cpp
--- a/hotspot/src/os/posix/vm/os_posix.cpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/os/posix/vm/os_posix.cpp	Wed Jul 05 19:05:35 2017 +0200
@@ -259,3 +259,52 @@
 FILE* os::open(int fd, const char* mode) {
   return ::fdopen(fd, mode);
 }
+
+os::WatcherThreadCrashProtection::WatcherThreadCrashProtection() {
+  assert(Thread::current()->is_Watcher_thread(), "Must be WatcherThread");
+}
+
+/*
+ * See the caveats for this class in os_posix.hpp
+ * Protects the callback call so that SIGSEGV / SIGBUS jumps back into this
+ * method and returns false. If none of the signals are raised, returns true.
+ * The callback is supposed to provide the method that should be protected.
+ */
+bool os::WatcherThreadCrashProtection::call(os::CrashProtectionCallback& cb) {
+  assert(Thread::current()->is_Watcher_thread(), "Only for WatcherThread");
+  assert(!WatcherThread::watcher_thread()->has_crash_protection(),
+      "crash_protection already set?");
+
+  if (sigsetjmp(_jmpbuf, 1) == 0) {
+    // make sure we can see in the signal handler that we have crash protection
+    // installed
+    WatcherThread::watcher_thread()->set_crash_protection(this);
+    cb.call();
+    // and clear the crash protection
+    WatcherThread::watcher_thread()->set_crash_protection(NULL);
+    return true;
+  }
+  // this happens when we siglongjmp() back
+  WatcherThread::watcher_thread()->set_crash_protection(NULL);
+  return false;
+}
+
+void os::WatcherThreadCrashProtection::restore() {
+  assert(WatcherThread::watcher_thread()->has_crash_protection(),
+      "must have crash protection");
+
+  siglongjmp(_jmpbuf, 1);
+}
+
+void os::WatcherThreadCrashProtection::check_crash_protection(int sig,
+    Thread* thread) {
+
+  if (thread != NULL &&
+      thread->is_Watcher_thread() &&
+      WatcherThread::watcher_thread()->has_crash_protection()) {
+
+    if (sig == SIGSEGV || sig == SIGBUS) {
+      WatcherThread::watcher_thread()->crash_protection()->restore();
+    }
+  }
+}
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/os/posix/vm/os_posix.hpp
--- a/hotspot/src/os/posix/vm/os_posix.hpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/os/posix/vm/os_posix.hpp	Wed Jul 05 19:05:35 2017 +0200
@@ -37,5 +37,24 @@
 
 };
 
+/*
+ * Crash protection for the watcher thread. Wrap the callback
+ * with a sigsetjmp and in case of a SIGSEGV/SIGBUS we siglongjmp
+ * back.
+ * To be able to use this - don't take locks, don't rely on destructors,
+ * don't make OS library calls, don't allocate memory, don't print,
+ * don't call code that could leave the heap / memory in an inconsistent state,
+ * or anything else where we are not in control if we suddenly jump out.
+ */
+class WatcherThreadCrashProtection : public StackObj {
+public:
+  WatcherThreadCrashProtection();
+  bool call(os::CrashProtectionCallback& cb);
+
+  static void check_crash_protection(int signal, Thread* thread);
+private:
+  void restore();
+  sigjmp_buf _jmpbuf;
+};
 
 #endif
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/os/solaris/vm/attachListener_solaris.cpp
--- a/hotspot/src/os/solaris/vm/attachListener_solaris.cpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/os/solaris/vm/attachListener_solaris.cpp	Wed Jul 05 19:05:35 2017 +0200
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2005, 2012, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2005, 2013, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -576,6 +576,30 @@
   return op;
 }
 
+
+// Performs initialization at vm startup
+// For Solaris we remove any stale .java_pid file which could cause
+// an attaching process to think we are ready to receive a door_call
+// before we are properly initialized
+
+void AttachListener::vm_start() {
+  char fn[PATH_MAX+1];
+  struct stat64 st;
+  int ret;
+
+  int n = snprintf(fn, sizeof(fn), "%s/.java_pid%d",
+           os::get_temp_directory(), os::current_process_id());
+  assert(n < sizeof(fn), "java_pid file name buffer overflow");
+
+  RESTARTABLE(::stat64(fn, &st), ret);
+  if (ret == 0) {
+    ret = ::unlink(fn);
+    if (ret == -1) {
+      debug_only(warning("failed to remove stale attach pid file at %s", fn));
+    }
+  }
+}
+
 int AttachListener::pd_init() {
   JavaThread* thread = JavaThread::current();
   ThreadBlockInVM tbivm(thread);
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/os/windows/vm/attachListener_windows.cpp
--- a/hotspot/src/os/windows/vm/attachListener_windows.cpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/os/windows/vm/attachListener_windows.cpp	Wed Jul 05 19:05:35 2017 +0200
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2005, 2013, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -358,6 +358,10 @@
   return op;
 }
 
+void AttachListener::vm_start() {
+  // nothing to do
+}
+
 int AttachListener::pd_init() {
   return Win32AttachListener::init();
 }
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/os/windows/vm/os_windows.cpp
--- a/hotspot/src/os/windows/vm/os_windows.cpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/os/windows/vm/os_windows.cpp	Wed Jul 05 19:05:35 2017 +0200
@@ -4689,6 +4689,34 @@
   }
 }
 
+os::WatcherThreadCrashProtection::WatcherThreadCrashProtection() {
+  assert(Thread::current()->is_Watcher_thread(), "Must be WatcherThread");
+}
+
+/*
+ * See the caveats for this class in os_windows.hpp
+ * Protects the callback call so that raised OS EXCEPTIONS causes a jump back
+ * into this method and returns false. If no OS EXCEPTION was raised, returns
+ * true.
+ * The callback is supposed to provide the method that should be protected.
+ */
+bool os::WatcherThreadCrashProtection::call(os::CrashProtectionCallback& cb) {
+  assert(Thread::current()->is_Watcher_thread(), "Only for WatcherThread");
+  assert(!WatcherThread::watcher_thread()->has_crash_protection(),
+      "crash_protection already set?");
+
+  bool success = true;
+  __try {
+    WatcherThread::watcher_thread()->set_crash_protection(this);
+    cb.call();
+  } __except(EXCEPTION_EXECUTE_HANDLER) {
+    // only for protection, nothing to do
+    success = false;
+  }
+  WatcherThread::watcher_thread()->set_crash_protection(NULL);
+  return success;
+}
+
 // An Event wraps a win32 "CreateEvent" kernel handle.
 //
 // We have a number of choices regarding "CreateEvent" win32 handle leakage:
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/os/windows/vm/os_windows.hpp
--- a/hotspot/src/os/windows/vm/os_windows.hpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/os/windows/vm/os_windows.hpp	Wed Jul 05 19:05:35 2017 +0200
@@ -102,6 +102,20 @@
   static LONG WINAPI serialize_fault_filter(struct _EXCEPTION_POINTERS* e);
 };
 
+/*
+ * Crash protection for the watcher thread. Wrap the callback
+ * with a __try { call() }
+ * To be able to use this - don't take locks, don't rely on destructors,
+ * don't make OS library calls, don't allocate memory, don't print,
+ * don't call code that could leave the heap / memory in an inconsistent state,
+ * or anything else where we are not in control if we suddenly jump out.
+ */
+class WatcherThreadCrashProtection : public StackObj {
+public:
+  WatcherThreadCrashProtection();
+  bool call(os::CrashProtectionCallback& cb);
+};
+
 class PlatformEvent : public CHeapObj<mtInternal> {
   private:
     double CachePad [4] ;   // increase odds that _Event is sole occupant of cache line
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/os_cpu/bsd_x86/vm/orderAccess_bsd_x86.inline.hpp
--- a/hotspot/src/os_cpu/bsd_x86/vm/orderAccess_bsd_x86.inline.hpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/os_cpu/bsd_x86/vm/orderAccess_bsd_x86.inline.hpp	Wed Jul 05 19:05:35 2017 +0200
@@ -72,7 +72,7 @@
 inline juint    OrderAccess::load_acquire(volatile juint*   p) { return *p; }
 inline julong   OrderAccess::load_acquire(volatile julong*  p) { return Atomic::load((volatile jlong*)p); }
 inline jfloat   OrderAccess::load_acquire(volatile jfloat*  p) { return *p; }
-inline jdouble  OrderAccess::load_acquire(volatile jdouble* p) { return *p; }
+inline jdouble  OrderAccess::load_acquire(volatile jdouble* p) { return jdouble_cast(Atomic::load((volatile jlong*)p)); }
 
 inline intptr_t OrderAccess::load_ptr_acquire(volatile intptr_t*   p) { return *p; }
 inline void*    OrderAccess::load_ptr_acquire(volatile void*       p) { return *(void* volatile *)p; }
@@ -87,7 +87,7 @@
 inline void     OrderAccess::release_store(volatile juint*   p, juint   v) { *p = v; }
 inline void     OrderAccess::release_store(volatile julong*  p, julong  v) { Atomic::store((jlong)v, (volatile jlong*)p); }
 inline void     OrderAccess::release_store(volatile jfloat*  p, jfloat  v) { *p = v; }
-inline void     OrderAccess::release_store(volatile jdouble* p, jdouble v) { *p = v; }
+inline void     OrderAccess::release_store(volatile jdouble* p, jdouble v) { release_store((volatile jlong*)p, jlong_cast(v)); }
 
 inline void     OrderAccess::release_store_ptr(volatile intptr_t* p, intptr_t v) { *p = v; }
 inline void     OrderAccess::release_store_ptr(volatile void*     p, void*    v) { *(void* volatile *)p = v; }
@@ -190,7 +190,7 @@
 inline void     OrderAccess::release_store_fence(volatile julong*  p, julong  v) { release_store_fence((volatile jlong*)p,  (jlong)v);  }
 
 inline void     OrderAccess::release_store_fence(volatile jfloat*  p, jfloat  v) { *p = v; fence(); }
-inline void     OrderAccess::release_store_fence(volatile jdouble* p, jdouble v) { *p = v; fence(); }
+inline void     OrderAccess::release_store_fence(volatile jdouble* p, jdouble v) { release_store_fence((volatile jlong*)p, jdouble_cast(v)); }
 
 inline void     OrderAccess::release_store_ptr_fence(volatile intptr_t* p, intptr_t v) {
 #ifdef AMD64
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/os_cpu/bsd_x86/vm/os_bsd_x86.cpp
--- a/hotspot/src/os_cpu/bsd_x86/vm/os_bsd_x86.cpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/os_cpu/bsd_x86/vm/os_bsd_x86.cpp	Wed Jul 05 19:05:35 2017 +0200
@@ -394,6 +394,10 @@
 
   Thread* t = ThreadLocalStorage::get_thread_slow();
 
+  // Must do this before SignalHandlerMark, if crash protection installed we will longjmp away
+  // (no destructors can be run)
+  os::WatcherThreadCrashProtection::check_crash_protection(sig, t);
+
   SignalHandlerMark shm(t);
 
   // Note: it's not uncommon that JNI code uses signal/sigset to install
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/os_cpu/linux_sparc/vm/os_linux_sparc.cpp
--- a/hotspot/src/os_cpu/linux_sparc/vm/os_linux_sparc.cpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/os_cpu/linux_sparc/vm/os_linux_sparc.cpp	Wed Jul 05 19:05:35 2017 +0200
@@ -544,6 +544,10 @@
 
   Thread* t = ThreadLocalStorage::get_thread_slow();
 
+  // Must do this before SignalHandlerMark, if crash protection installed we will longjmp away
+  // (no destructors can be run)
+  os::WatcherThreadCrashProtection::check_crash_protection(sig, t);
+
   SignalHandlerMark shm(t);
 
   // Note: it's not uncommon that JNI code uses signal/sigset to install
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/os_cpu/linux_x86/vm/orderAccess_linux_x86.inline.hpp
--- a/hotspot/src/os_cpu/linux_x86/vm/orderAccess_linux_x86.inline.hpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/os_cpu/linux_x86/vm/orderAccess_linux_x86.inline.hpp	Wed Jul 05 19:05:35 2017 +0200
@@ -72,7 +72,7 @@
 inline juint    OrderAccess::load_acquire(volatile juint*   p) { return *p; }
 inline julong   OrderAccess::load_acquire(volatile julong*  p) { return Atomic::load((volatile jlong*)p); }
 inline jfloat   OrderAccess::load_acquire(volatile jfloat*  p) { return *p; }
-inline jdouble  OrderAccess::load_acquire(volatile jdouble* p) { return *p; }
+inline jdouble  OrderAccess::load_acquire(volatile jdouble* p) { return jdouble_cast(Atomic::load((volatile jlong*)p)); }
 
 inline intptr_t OrderAccess::load_ptr_acquire(volatile intptr_t*   p) { return *p; }
 inline void*    OrderAccess::load_ptr_acquire(volatile void*       p) { return *(void* volatile *)p; }
@@ -87,7 +87,7 @@
 inline void     OrderAccess::release_store(volatile juint*   p, juint   v) { *p = v; }
 inline void     OrderAccess::release_store(volatile julong*  p, julong  v) { Atomic::store((jlong)v, (volatile jlong*)p); }
 inline void     OrderAccess::release_store(volatile jfloat*  p, jfloat  v) { *p = v; }
-inline void     OrderAccess::release_store(volatile jdouble* p, jdouble v) { *p = v; }
+inline void     OrderAccess::release_store(volatile jdouble* p, jdouble v) { release_store((volatile jlong *)p, jlong_cast(v)); }
 
 inline void     OrderAccess::release_store_ptr(volatile intptr_t* p, intptr_t v) { *p = v; }
 inline void     OrderAccess::release_store_ptr(volatile void*     p, void*    v) { *(void* volatile *)p = v; }
@@ -129,7 +129,7 @@
 inline void     OrderAccess::store_fence(juint*   p, juint   v) { store_fence((jint*)p,   (jint)v);   }
 inline void     OrderAccess::store_fence(julong*  p, julong  v) { store_fence((jlong*)p,  (jlong)v);  }
 inline void     OrderAccess::store_fence(jfloat*  p, jfloat  v) { *p = v; fence(); }
-inline void     OrderAccess::store_fence(jdouble* p, jdouble v) { *p = v; fence(); }
+inline void     OrderAccess::store_fence(jdouble* p, jdouble v) { store_fence((jlong*)p, jlong_cast(v)); }
 
 inline void     OrderAccess::store_ptr_fence(intptr_t* p, intptr_t v) {
 #ifdef AMD64
@@ -190,7 +190,7 @@
 inline void     OrderAccess::release_store_fence(volatile julong*  p, julong  v) { release_store_fence((volatile jlong*)p,  (jlong)v);  }
 
 inline void     OrderAccess::release_store_fence(volatile jfloat*  p, jfloat  v) { *p = v; fence(); }
-inline void     OrderAccess::release_store_fence(volatile jdouble* p, jdouble v) { *p = v; fence(); }
+inline void     OrderAccess::release_store_fence(volatile jdouble* p, jdouble v) { release_store_fence((volatile jlong*)p, jlong_cast(v)); }
 
 inline void     OrderAccess::release_store_ptr_fence(volatile intptr_t* p, intptr_t v) {
 #ifdef AMD64
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/os_cpu/linux_x86/vm/os_linux_x86.cpp
--- a/hotspot/src/os_cpu/linux_x86/vm/os_linux_x86.cpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/os_cpu/linux_x86/vm/os_linux_x86.cpp	Wed Jul 05 19:05:35 2017 +0200
@@ -218,6 +218,10 @@
 
   Thread* t = ThreadLocalStorage::get_thread_slow();
 
+  // Must do this before SignalHandlerMark, if crash protection installed we will longjmp away
+  // (no destructors can be run)
+  os::WatcherThreadCrashProtection::check_crash_protection(sig, t);
+
   SignalHandlerMark shm(t);
 
   // Note: it's not uncommon that JNI code uses signal/sigset to install
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/os_cpu/solaris_sparc/vm/os_solaris_sparc.cpp
--- a/hotspot/src/os_cpu/solaris_sparc/vm/os_solaris_sparc.cpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/os_cpu/solaris_sparc/vm/os_solaris_sparc.cpp	Wed Jul 05 19:05:35 2017 +0200
@@ -310,6 +310,10 @@
 
   Thread* t = ThreadLocalStorage::get_thread_slow();
 
+  // Must do this before SignalHandlerMark, if crash protection installed we will longjmp away
+  // (no destructors can be run)
+  os::WatcherThreadCrashProtection::check_crash_protection(sig, t);
+
   SignalHandlerMark shm(t);
 
   if(sig == SIGPIPE || sig == SIGXFSZ) {
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/os_cpu/solaris_x86/vm/orderAccess_solaris_x86.inline.hpp
--- a/hotspot/src/os_cpu/solaris_x86/vm/orderAccess_solaris_x86.inline.hpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/os_cpu/solaris_x86/vm/orderAccess_solaris_x86.inline.hpp	Wed Jul 05 19:05:35 2017 +0200
@@ -88,7 +88,7 @@
 inline juint    OrderAccess::load_acquire(volatile juint*   p) { return *p; }
 inline julong   OrderAccess::load_acquire(volatile julong*  p) { return Atomic::load((volatile jlong*)p); }
 inline jfloat   OrderAccess::load_acquire(volatile jfloat*  p) { return *p; }
-inline jdouble  OrderAccess::load_acquire(volatile jdouble* p) { return *p; }
+inline jdouble  OrderAccess::load_acquire(volatile jdouble* p) { return jdouble_cast(Atomic::load((volatile jlong*)p)); }
 
 inline intptr_t OrderAccess::load_ptr_acquire(volatile intptr_t*   p) { return *p; }
 inline void*    OrderAccess::load_ptr_acquire(volatile void*       p) { return *(void* volatile *)p; }
@@ -103,7 +103,7 @@
 inline void     OrderAccess::release_store(volatile juint*   p, juint   v) { *p = v; }
 inline void     OrderAccess::release_store(volatile julong*  p, julong  v) { Atomic::store((jlong)v, (volatile jlong*)p); }
 inline void     OrderAccess::release_store(volatile jfloat*  p, jfloat  v) { *p = v; }
-inline void     OrderAccess::release_store(volatile jdouble* p, jdouble v) { *p = v; }
+inline void     OrderAccess::release_store(volatile jdouble* p, jdouble v) { release_store((volatile jlong*)p, jlong_cast(v)); }
 
 inline void     OrderAccess::release_store_ptr(volatile intptr_t* p, intptr_t v) { *p = v; }
 inline void     OrderAccess::release_store_ptr(volatile void*     p, void*    v) { *(void* volatile *)p = v; }
@@ -129,9 +129,9 @@
 inline void     OrderAccess::release_store_fence(volatile jubyte*  p, jubyte  v) { *p = v; fence(); }
 inline void     OrderAccess::release_store_fence(volatile jushort* p, jushort v) { *p = v; fence(); }
 inline void     OrderAccess::release_store_fence(volatile juint*   p, juint   v) { *p = v; fence(); }
-inline void     OrderAccess::release_store_fence(volatile julong*  p, julong  v) { release_store(p, v); fence(); }
+inline void     OrderAccess::release_store_fence(volatile julong*  p, julong  v) { release_store((jlong *)p, (jlong)v); fence(); }
 inline void     OrderAccess::release_store_fence(volatile jfloat*  p, jfloat  v) { *p = v; fence(); }
-inline void     OrderAccess::release_store_fence(volatile jdouble* p, jdouble v) { *p = v; fence(); }
+inline void     OrderAccess::release_store_fence(volatile jdouble* p, jdouble v) { release_store_fence((volatile jlong*)p, jlong_cast(v)); }
 
 inline void     OrderAccess::release_store_ptr_fence(volatile intptr_t* p, intptr_t v) { *p = v; fence(); }
 inline void     OrderAccess::release_store_ptr_fence(volatile void*     p, void*    v) { *(void* volatile *)p = v; fence(); }
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/os_cpu/solaris_x86/vm/os_solaris_x86.cpp
--- a/hotspot/src/os_cpu/solaris_x86/vm/os_solaris_x86.cpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/os_cpu/solaris_x86/vm/os_solaris_x86.cpp	Wed Jul 05 19:05:35 2017 +0200
@@ -367,6 +367,10 @@
 
   Thread* t = ThreadLocalStorage::get_thread_slow();  // slow & steady
 
+  // Must do this before SignalHandlerMark, if crash protection installed we will longjmp away
+  // (no destructors can be run)
+  os::WatcherThreadCrashProtection::check_crash_protection(sig, t);
+
   SignalHandlerMark shm(t);
 
   if(sig == SIGPIPE || sig == SIGXFSZ) {
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/os_cpu/windows_x86/vm/orderAccess_windows_x86.inline.hpp
--- a/hotspot/src/os_cpu/windows_x86/vm/orderAccess_windows_x86.inline.hpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/os_cpu/windows_x86/vm/orderAccess_windows_x86.inline.hpp	Wed Jul 05 19:05:35 2017 +0200
@@ -71,7 +71,7 @@
 inline juint    OrderAccess::load_acquire(volatile juint*   p) { return *p; }
 inline julong   OrderAccess::load_acquire(volatile julong*  p) { return Atomic::load((volatile jlong*)p); }
 inline jfloat   OrderAccess::load_acquire(volatile jfloat*  p) { return *p; }
-inline jdouble  OrderAccess::load_acquire(volatile jdouble* p) { return *p; }
+inline jdouble  OrderAccess::load_acquire(volatile jdouble* p) { return jdouble_cast(Atomic::load((volatile jlong*)p)); }
 
 inline intptr_t OrderAccess::load_ptr_acquire(volatile intptr_t*   p) { return *p; }
 inline void*    OrderAccess::load_ptr_acquire(volatile void*       p) { return *(void* volatile *)p; }
@@ -86,7 +86,7 @@
 inline void     OrderAccess::release_store(volatile juint*   p, juint   v) { *p = v; }
 inline void     OrderAccess::release_store(volatile julong*  p, julong  v) { Atomic::store((jlong)v, (volatile jlong*)p); }
 inline void     OrderAccess::release_store(volatile jfloat*  p, jfloat  v) { *p = v; }
-inline void     OrderAccess::release_store(volatile jdouble* p, jdouble v) { *p = v; }
+inline void     OrderAccess::release_store(volatile jdouble* p, jdouble v) { release_store((volatile jlong*)p, jlong_cast(v)); }
 
 inline void     OrderAccess::release_store_ptr(volatile intptr_t* p, intptr_t v) { *p = v; }
 inline void     OrderAccess::release_store_ptr(volatile void*     p, void*    v) { *(void* volatile *)p = v; }
@@ -195,7 +195,7 @@
 inline void     OrderAccess::release_store_fence(volatile juint*   p, juint   v) { release_store_fence((volatile jint*)p,   (jint)v);   }
 inline void     OrderAccess::release_store_fence(volatile julong*  p, julong  v) { release_store_fence((volatile jlong*)p,  (jlong)v);  }
 inline void     OrderAccess::release_store_fence(volatile jfloat*  p, jfloat  v) { *p = v; fence(); }
-inline void     OrderAccess::release_store_fence(volatile jdouble* p, jdouble v) { *p = v; fence(); }
+inline void     OrderAccess::release_store_fence(volatile jdouble* p, jdouble v) { release_store_fence((volatile jlong*)p, jlong_cast(v)); }
 
 inline void     OrderAccess::release_store_ptr_fence(volatile intptr_t* p, intptr_t v) {
 #ifdef AMD64
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/os_cpu/windows_x86/vm/unwind_windows_x86.hpp
--- a/hotspot/src/os_cpu/windows_x86/vm/unwind_windows_x86.hpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/os_cpu/windows_x86/vm/unwind_windows_x86.hpp	Wed Jul 05 19:05:35 2017 +0200
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2004, 2011, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2004, 2013, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -29,10 +29,15 @@
 #ifdef AMD64
 typedef unsigned char UBYTE;
 
+#if _MSC_VER < 1700
+
+/* Not needed for VS2012 compiler, comes from winnt.h. */
 #define UNW_FLAG_EHANDLER  0x01
 #define UNW_FLAG_UHANDLER  0x02
 #define UNW_FLAG_CHAININFO 0x04
 
+#endif
+
 // This structure is used to define an UNWIND_INFO that
 // only has an ExceptionHandler.  There are no UnwindCodes
 // declared.
@@ -59,6 +64,9 @@
 } RUNTIME_FUNCTION, *PRUNTIME_FUNCTION;
 */
 
+#if _MSC_VER < 1700
+
+/* Not needed for VS2012 compiler, comes from winnt.h. */
 typedef struct _DISPATCHER_CONTEXT {
     ULONG64 ControlPc;
     ULONG64 ImageBase;
@@ -71,6 +79,8 @@
     PVOID HandlerData;
 } DISPATCHER_CONTEXT, *PDISPATCHER_CONTEXT;
 
+#endif
+
 #if _MSC_VER < 1500
 
 /* Not needed for VS2008 compiler, comes from winnt.h. */
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/share/vm/ci/bcEscapeAnalyzer.cpp
--- a/hotspot/src/share/vm/ci/bcEscapeAnalyzer.cpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/share/vm/ci/bcEscapeAnalyzer.cpp	Wed Jul 05 19:05:35 2017 +0200
@@ -138,6 +138,16 @@
   return false;
 }
 
+// return true if all argument elements of vars are returned
+bool BCEscapeAnalyzer::returns_all(ArgumentMap vars) {
+  for (int i = 0; i < _arg_size; i++) {
+    if (vars.contains(i) && !_arg_returned.test(i)) {
+      return false;
+    }
+  }
+  return true;
+}
+
 void BCEscapeAnalyzer::clear_bits(ArgumentMap vars, VectorSet &bm) {
   for (int i = 0; i < _arg_size; i++) {
     if (vars.contains(i)) {
@@ -166,6 +176,11 @@
     if (vars.contains_unknown() || vars.contains_vars()) {
       _return_allocated = false;
     }
+    if (_return_local && vars.contains_vars() && !returns_all(vars)) {
+      // Return result should be invalidated if args in new
+      // state are not recorded in return state.
+      _return_local = false;
+    }
   }
 }
 
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/share/vm/ci/bcEscapeAnalyzer.hpp
--- a/hotspot/src/share/vm/ci/bcEscapeAnalyzer.hpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/share/vm/ci/bcEscapeAnalyzer.hpp	Wed Jul 05 19:05:35 2017 +0200
@@ -80,6 +80,7 @@
   void set_returned(ArgumentMap vars);
   bool is_argument(ArgumentMap vars);
   bool is_arg_stack(ArgumentMap vars);
+  bool returns_all(ArgumentMap vars);
   void clear_bits(ArgumentMap vars, VectorSet &bs);
   void set_method_escape(ArgumentMap vars);
   void set_global_escape(ArgumentMap vars, bool merge = false);
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/share/vm/classfile/classFileParser.cpp
--- a/hotspot/src/share/vm/classfile/classFileParser.cpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/share/vm/classfile/classFileParser.cpp	Wed Jul 05 19:05:35 2017 +0200
@@ -3647,8 +3647,7 @@
   // If RedefineClasses() was used before the retransformable
   // agent attached, then the cached class bytes may not be the
   // original class bytes.
-  unsigned char *cached_class_file_bytes = NULL;
-  jint cached_class_file_length;
+  JvmtiCachedClassFileData *cached_class_file = NULL;
   Handle class_loader(THREAD, loader_data->class_loader());
   bool has_default_methods = false;
   ResourceMark rm(THREAD);
@@ -3680,10 +3679,7 @@
       if (h_class_being_redefined != NULL) {
         instanceKlassHandle ikh_class_being_redefined =
           instanceKlassHandle(THREAD, (*h_class_being_redefined)());
-        cached_class_file_bytes =
-          ikh_class_being_redefined->get_cached_class_file_bytes();
-        cached_class_file_length =
-          ikh_class_being_redefined->get_cached_class_file_len();
+        cached_class_file = ikh_class_being_redefined->get_cached_class_file();
       }
     }
 
@@ -3691,9 +3687,7 @@
     unsigned char* end_ptr = cfs->buffer() + cfs->length();
 
     JvmtiExport::post_class_file_load_hook(name, class_loader(), protection_domain,
-                                           &ptr, &end_ptr,
-                                           &cached_class_file_bytes,
-                                           &cached_class_file_length);
+                                           &ptr, &end_ptr, &cached_class_file);
 
     if (ptr != cfs->buffer()) {
       // JVMTI agent has modified class file data.
@@ -4011,10 +4005,9 @@
       }
     }
 
-    if (cached_class_file_bytes != NULL) {
+    if (cached_class_file != NULL) {
       // JVMTI: we have an InstanceKlass now, tell it about the cached bytes
-      this_klass->set_cached_class_file(cached_class_file_bytes,
-                                        cached_class_file_length);
+      this_klass->set_cached_class_file(cached_class_file);
     }
 
     // Fill in field values obtained by parse_classfile_attributes
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/share/vm/classfile/vmSymbols.hpp
--- a/hotspot/src/share/vm/classfile/vmSymbols.hpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/share/vm/classfile/vmSymbols.hpp	Wed Jul 05 19:05:35 2017 +0200
@@ -53,8 +53,6 @@
   template(java_lang_Object,                          "java/lang/Object")                         \
   template(java_lang_Class,                           "java/lang/Class")                          \
   template(java_lang_String,                          "java/lang/String")                         \
-  template(java_lang_StringValue,                     "java/lang/StringValue")                    \
-  template(java_lang_StringCache,                     "java/lang/StringValue$StringCache")        \
   template(java_lang_Thread,                          "java/lang/Thread")                         \
   template(java_lang_ThreadGroup,                     "java/lang/ThreadGroup")                    \
   template(java_lang_Cloneable,                       "java/lang/Cloneable")                      \
@@ -106,7 +104,6 @@
   template(java_util_Vector,                          "java/util/Vector")                         \
   template(java_util_AbstractList,                    "java/util/AbstractList")                   \
   template(java_util_Hashtable,                       "java/util/Hashtable")                      \
-  template(java_util_HashMap,                         "java/util/HashMap")                        \
   template(java_lang_Compiler,                        "java/lang/Compiler")                       \
   template(sun_misc_Signal,                           "sun/misc/Signal")                          \
   template(java_lang_AssertionStatusDirectives,       "java/lang/AssertionStatusDirectives")      \
@@ -367,8 +364,6 @@
   template(offset_name,                               "offset")                                   \
   template(count_name,                                "count")                                    \
   template(hash_name,                                 "hash")                                     \
-  template(frontCacheEnabled_name,                    "frontCacheEnabled")                        \
-  template(stringCacheEnabled_name,                   "stringCacheEnabled")                       \
   template(numberOfLeadingZeros_name,                 "numberOfLeadingZeros")                     \
   template(numberOfTrailingZeros_name,                "numberOfTrailingZeros")                    \
   template(bitCount_name,                             "bitCount")                                 \
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/share/vm/memory/resourceArea.hpp
--- a/hotspot/src/share/vm/memory/resourceArea.hpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/share/vm/memory/resourceArea.hpp	Wed Jul 05 19:05:35 2017 +0200
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -83,6 +83,10 @@
   Chunk *_chunk;                // saved arena chunk
   char *_hwm, *_max;
   size_t _size_in_bytes;
+#ifdef ASSERT
+  Thread* _thread;
+  ResourceMark* _previous_resource_mark;
+#endif //ASSERT
 
   void initialize(Thread *thread) {
     _area = thread->resource_area();
@@ -92,6 +96,11 @@
     _size_in_bytes = _area->size_in_bytes();
     debug_only(_area->_nesting++;)
     assert( _area->_nesting > 0, "must stack allocate RMs" );
+#ifdef ASSERT
+    _thread = thread;
+    _previous_resource_mark = thread->current_resource_mark();
+    thread->set_current_resource_mark(this);
+#endif // ASSERT
   }
  public:
 
@@ -111,6 +120,17 @@
     _size_in_bytes = r->_size_in_bytes;
     debug_only(_area->_nesting++;)
     assert( _area->_nesting > 0, "must stack allocate RMs" );
+#ifdef ASSERT
+    Thread* thread = ThreadLocalStorage::thread();
+    if (thread != NULL) {
+      _thread = thread;
+      _previous_resource_mark = thread->current_resource_mark();
+      thread->set_current_resource_mark(this);
+    } else {
+      _thread = NULL;
+      _previous_resource_mark = NULL;
+    }
+#endif // ASSERT
   }
 
   void reset_to_mark() {
@@ -137,6 +157,11 @@
     assert( _area->_nesting > 0, "must stack allocate RMs" );
     debug_only(_area->_nesting--;)
     reset_to_mark();
+#ifdef ASSERT
+    if (_thread != NULL) {
+      _thread->set_current_resource_mark(_previous_resource_mark);
+    }
+#endif // ASSERT
   }
 
 
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/share/vm/oops/cpCache.hpp
--- a/hotspot/src/share/vm/oops/cpCache.hpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/share/vm/oops/cpCache.hpp	Wed Jul 05 19:05:35 2017 +0200
@@ -140,8 +140,15 @@
     _f1 = f1;
   }
   void release_set_f1(Metadata* f1);
-  void set_f2(intx f2)                           { assert(_f2 == 0 || _f2 == f2,            "illegal field change"); _f2 = f2; }
-  void set_f2_as_vfinal_method(Method* f2)     { assert(_f2 == 0 || _f2 == (intptr_t) f2, "illegal field change"); assert(is_vfinal(), "flags must be set"); _f2 = (intptr_t) f2; }
+  void set_f2(intx f2) {
+    intx existing_f2 = _f2; // read once
+    assert(existing_f2 == 0 || existing_f2 == f2, "illegal field change");
+    _f2 = f2;
+  }
+  void set_f2_as_vfinal_method(Method* f2) {
+    assert(is_vfinal(), "flags must be set");
+    set_f2((intx)f2);
+  }
   int make_flags(TosState state, int option_bits, int field_index_or_method_params);
   void set_flags(intx flags)                     { _flags = flags; }
   bool init_flags_atomic(intx flags);
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/share/vm/oops/instanceKlass.cpp
--- a/hotspot/src/share/vm/oops/instanceKlass.cpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/share/vm/oops/instanceKlass.cpp	Wed Jul 05 19:05:35 2017 +0200
@@ -48,6 +48,7 @@
 #include "oops/symbol.hpp"
 #include "prims/jvmtiExport.hpp"
 #include "prims/jvmtiRedefineClassesTrace.hpp"
+#include "prims/jvmtiRedefineClasses.hpp"
 #include "prims/methodComparator.hpp"
 #include "runtime/fieldDescriptor.hpp"
 #include "runtime/handles.inline.hpp"
@@ -291,7 +292,7 @@
   set_initial_method_idnum(0);
   _dependencies = NULL;
   set_jvmti_cached_class_field_map(NULL);
-  set_cached_class_file(NULL, 0);
+  set_cached_class_file(NULL);
   set_initial_method_idnum(0);
   set_minor_version(0);
   set_major_version(0);
@@ -2357,10 +2358,9 @@
   }
 
   // deallocate the cached class file
-  if (_cached_class_file_bytes != NULL) {
-    os::free(_cached_class_file_bytes, mtClass);
-    _cached_class_file_bytes = NULL;
-    _cached_class_file_len = 0;
+  if (_cached_class_file != NULL) {
+    os::free(_cached_class_file, mtClass);
+    _cached_class_file = NULL;
   }
 
   // Decrement symbol reference counts associated with the unloaded class.
@@ -3530,6 +3530,14 @@
   return m;
 }
 
+jint InstanceKlass::get_cached_class_file_len() {
+  return VM_RedefineClasses::get_cached_class_file_len(_cached_class_file);
+}
+
+unsigned char * InstanceKlass::get_cached_class_file_bytes() {
+  return VM_RedefineClasses::get_cached_class_file_bytes(_cached_class_file);
+}
+
 
 // Construct a PreviousVersionNode entry for the array hung off
 // the InstanceKlass.
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/share/vm/oops/instanceKlass.hpp
--- a/hotspot/src/share/vm/oops/instanceKlass.hpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/share/vm/oops/instanceKlass.hpp	Wed Jul 05 19:05:35 2017 +0200
@@ -133,6 +133,8 @@
   uint _count;
 };
 
+struct JvmtiCachedClassFileData;
+
 class InstanceKlass: public Klass {
   friend class VMStructs;
   friend class ClassFileParser;
@@ -249,8 +251,8 @@
   // InstanceKlass. See PreviousVersionWalker below.
   GrowableArray<PreviousVersionNode *>* _previous_versions;
   // JVMTI fields can be moved to their own structure - see 6315920
-  unsigned char * _cached_class_file_bytes;       // JVMTI: cached class file, before retransformable agent modified it in CFLH
-  jint            _cached_class_file_len;         // JVMTI: length of above
+  // JVMTI: cached class file, before retransformable agent modified it in CFLH
+  JvmtiCachedClassFileData* _cached_class_file;
 
   volatile u2     _idnum_allocated_count;         // JNI/JVMTI: increments with the addition of methods, old ids don't change
 
@@ -615,11 +617,12 @@
   static void purge_previous_versions(InstanceKlass* ik);
 
   // JVMTI: Support for caching a class file before it is modified by an agent that can do retransformation
-  void set_cached_class_file(unsigned char *class_file_bytes,
-                             jint class_file_len)     { _cached_class_file_len = class_file_len;
-                                                        _cached_class_file_bytes = class_file_bytes; }
-  jint get_cached_class_file_len()                    { return _cached_class_file_len; }
-  unsigned char * get_cached_class_file_bytes()       { return _cached_class_file_bytes; }
+  void set_cached_class_file(JvmtiCachedClassFileData *data) {
+    _cached_class_file = data;
+  }
+  JvmtiCachedClassFileData * get_cached_class_file() { return _cached_class_file; }
+  jint get_cached_class_file_len();
+  unsigned char * get_cached_class_file_bytes();
 
   // JVMTI: Support for caching of field indices, types, and offsets
   void set_jvmti_cached_class_field_map(JvmtiCachedClassFieldMap* descriptor) {
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/share/vm/oops/method.cpp
--- a/hotspot/src/share/vm/oops/method.cpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/share/vm/oops/method.cpp	Wed Jul 05 19:05:35 2017 +0200
@@ -1163,6 +1163,7 @@
   newm->constMethod()->set_constMethod_size(new_const_method_size);
   newm->set_method_size(new_method_size);
   assert(newm->code_size() == new_code_length, "check");
+  assert(newm->method_parameters_length() == method_parameters_len, "check");
   assert(newm->checked_exceptions_length() == checked_exceptions_len, "check");
   assert(newm->exception_table_length() == exception_table_len, "check");
   assert(newm->localvariable_table_length() == localvariable_len, "check");
@@ -1174,6 +1175,12 @@
            new_compressed_linenumber_table,
            new_compressed_linenumber_size);
   }
+  // Copy method_parameters
+  if (method_parameters_len > 0) {
+    memcpy(newm->method_parameters_start(),
+           m->method_parameters_start(),
+           method_parameters_len * sizeof(MethodParametersElement));
+  }
   // Copy checked_exceptions
   if (checked_exceptions_len > 0) {
     memcpy(newm->checked_exceptions_start(),
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/share/vm/opto/bytecodeInfo.cpp
--- a/hotspot/src/share/vm/opto/bytecodeInfo.cpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/share/vm/opto/bytecodeInfo.cpp	Wed Jul 05 19:05:35 2017 +0200
@@ -297,15 +297,6 @@
     }
   }
 
-  if (UseStringCache) {
-    // Do not inline StringCache::profile() method used only at the beginning.
-    if (callee_method->name() == ciSymbol::profile_name() &&
-        callee_method->holder()->name() == ciSymbol::java_lang_StringCache()) {
-      set_msg("profiling method");
-      return true;
-    }
-  }
-
   // use frequency-based objections only for non-trivial methods
   if (callee_method->code_size() <= MaxTrivialSize) {
     return false;
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/share/vm/opto/matcher.cpp
--- a/hotspot/src/share/vm/opto/matcher.cpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/share/vm/opto/matcher.cpp	Wed Jul 05 19:05:35 2017 +0200
@@ -2305,26 +2305,26 @@
 // atomic instruction acting as a store_load barrier without any
 // intervening volatile load, and thus we don't need a barrier here.
 // We retain the Node to act as a compiler ordering barrier.
-bool Matcher::post_store_load_barrier(const Node *vmb) {
-  Compile *C = Compile::current();
-  assert( vmb->is_MemBar(), "" );
-  assert( vmb->Opcode() != Op_MemBarAcquire, "" );
-  const MemBarNode *mem = (const MemBarNode*)vmb;
+bool Matcher::post_store_load_barrier(const Node* vmb) {
+  Compile* C = Compile::current();
+  assert(vmb->is_MemBar(), "");
+  assert(vmb->Opcode() != Op_MemBarAcquire, "");
+  const MemBarNode* membar = vmb->as_MemBar();
 
-  // Get the Proj node, ctrl, that can be used to iterate forward
-  Node *ctrl = NULL;
-  DUIterator_Fast imax, i = mem->fast_outs(imax);
-  while( true ) {
-    ctrl = mem->fast_out(i);            // Throw out-of-bounds if proj not found
-    assert( ctrl->is_Proj(), "only projections here" );
-    ProjNode *proj = (ProjNode*)ctrl;
-    if( proj->_con == TypeFunc::Control &&
-        !C->node_arena()->contains(ctrl) ) // Unmatched old-space only
+  // Get the Ideal Proj node, ctrl, that can be used to iterate forward
+  Node* ctrl = NULL;
+  for (DUIterator_Fast imax, i = membar->fast_outs(imax); i < imax; i++) {
+    Node* p = membar->fast_out(i);
+    assert(p->is_Proj(), "only projections here");
+    if ((p->as_Proj()->_con == TypeFunc::Control) &&
+        !C->node_arena()->contains(p)) { // Unmatched old-space only
+      ctrl = p;
       break;
-    i++;
+    }
   }
+  assert((ctrl != NULL), "missing control projection");
 
-  for( DUIterator_Fast jmax, j = ctrl->fast_outs(jmax); j < jmax; j++ ) {
+  for (DUIterator_Fast jmax, j = ctrl->fast_outs(jmax); j < jmax; j++) {
     Node *x = ctrl->fast_out(j);
     int xop = x->Opcode();
 
@@ -2336,37 +2336,36 @@
     // that a monitor exit operation contains a serializing instruction.
 
     if (xop == Op_MemBarVolatile ||
-        xop == Op_FastLock ||
         xop == Op_CompareAndSwapL ||
         xop == Op_CompareAndSwapP ||
         xop == Op_CompareAndSwapN ||
-        xop == Op_CompareAndSwapI)
+        xop == Op_CompareAndSwapI) {
       return true;
+    }
+
+    // Op_FastLock previously appeared in the Op_* list above.
+    // With biased locking we're no longer guaranteed that a monitor
+    // enter operation contains a serializing instruction.
+    if ((xop == Op_FastLock) && !UseBiasedLocking) {
+      return true;
+    }
 
     if (x->is_MemBar()) {
       // We must retain this membar if there is an upcoming volatile
-      // load, which will be preceded by acquire membar.
-      if (xop == Op_MemBarAcquire)
+      // load, which will be followed by acquire membar.
+      if (xop == Op_MemBarAcquire) {
         return false;
-      // For other kinds of barriers, check by pretending we
-      // are them, and seeing if we can be removed.
-      else
-        return post_store_load_barrier((const MemBarNode*)x);
+      } else {
+        // For other kinds of barriers, check by pretending we
+        // are them, and seeing if we can be removed.
+        return post_store_load_barrier(x->as_MemBar());
+      }
     }
 
-    // Delicate code to detect case of an upcoming fastlock block
-    if( x->is_If() && x->req() > 1 &&
-        !C->node_arena()->contains(x) ) { // Unmatched old-space only
-      Node *iff = x;
-      Node *bol = iff->in(1);
-      // The iff might be some random subclass of If or bol might be Con-Top
-      if (!bol->is_Bool())  return false;
-      assert( bol->req() > 1, "" );
-      return (bol->in(1)->Opcode() == Op_FastUnlock);
+    // probably not necessary to check for these
+    if (x->is_Call() || x->is_SafePoint() || x->is_block_proj()) {
+      return false;
     }
-    // probably not necessary to check for these
-    if (x->is_Call() || x->is_SafePoint() || x->is_block_proj())
-      return false;
   }
   return false;
 }
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/share/vm/opto/parse3.cpp
--- a/hotspot/src/share/vm/opto/parse3.cpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/share/vm/opto/parse3.cpp	Wed Jul 05 19:05:35 2017 +0200
@@ -294,25 +294,7 @@
   // If reference is volatile, prevent following volatiles ops from
   // floating up before the volatile write.
   if (is_vol) {
-    // First place the specific membar for THIS volatile index. This first
-    // membar is dependent on the store, keeping any other membars generated
-    // below from floating up past the store.
-    int adr_idx = C->get_alias_index(adr_type);
-    insert_mem_bar_volatile(Op_MemBarVolatile, adr_idx, store);
-
-    // Now place a membar for AliasIdxBot for the unknown yet-to-be-parsed
-    // volatile alias indices. Skip this if the membar is redundant.
-    if (adr_idx != Compile::AliasIdxBot) {
-      insert_mem_bar_volatile(Op_MemBarVolatile, Compile::AliasIdxBot, store);
-    }
-
-    // Finally, place alias-index-specific membars for each volatile index
-    // that isn't the adr_idx membar. Typically there's only 1 or 2.
-    for( int i = Compile::AliasIdxRaw; i < C->num_alias_types(); i++ ) {
-      if (i != adr_idx && C->alias_type(i)->is_volatile()) {
-        insert_mem_bar_volatile(Op_MemBarVolatile, i, store);
-      }
-    }
+    insert_mem_bar(Op_MemBarVolatile); // Use fat membar
   }
 
   // If the field is final, the rules of Java say we are in <init> or <clinit>.
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/share/vm/prims/forte.cpp
--- a/hotspot/src/share/vm/prims/forte.cpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/share/vm/prims/forte.cpp	Wed Jul 05 19:05:35 2017 +0200
@@ -31,6 +31,7 @@
 #include "oops/oop.inline.hpp"
 #include "oops/oop.inline2.hpp"
 #include "prims/forte.hpp"
+#include "runtime/javaCalls.hpp"
 #include "runtime/thread.hpp"
 #include "runtime/vframe.hpp"
 #include "runtime/vframeArray.hpp"
@@ -308,10 +309,14 @@
 
   for (loop_count = 0; loop_count < loop_max; loop_count++) {
 
-    if (candidate.is_first_frame()) {
+    if (candidate.is_entry_frame()) {
+      // jcw is NULL if the java call wrapper couldn't be found
+      JavaCallWrapper *jcw = candidate.entry_frame_call_wrapper_if_safe(thread);
       // If initial frame is frame from StubGenerator and there is no
       // previous anchor, there are no java frames associated with a method
-      return false;
+      if (jcw == NULL || jcw->is_first_frame()) {
+        return false;
+      }
     }
 
     if (candidate.is_interpreted_frame()) {
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/share/vm/prims/jniCheck.cpp
--- a/hotspot/src/share/vm/prims/jniCheck.cpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/share/vm/prims/jniCheck.cpp	Wed Jul 05 19:05:35 2017 +0200
@@ -126,6 +126,7 @@
 static const char * fatal_non_weak_method = "non-weak methodID passed to JNI call";
 static const char * fatal_unknown_array_object = "Unknown array object passed to JNI array operations";
 static const char * fatal_object_array_expected = "Object array expected but not received for JNI array operation";
+static const char * fatal_prim_type_array_expected = "Primitive type array expected but not received for JNI array operation";
 static const char * fatal_non_array  = "Non-array passed to JNI array operations";
 static const char * fatal_element_type_mismatch = "Array element type mismatch in JNI";
 static const char * fatal_should_be_static = "Non-static field ID passed to JNI";
@@ -278,30 +279,49 @@
     ReportJNIFatalError(thr, fatal_non_string);
 }
 
-static inline void
-checkArray(JavaThread* thr, jarray jArray, int elementType)
+static inline arrayOop
+check_is_array(JavaThread* thr, jarray jArray)
 {
   ASSERT_OOPS_ALLOWED;
   arrayOop aOop;
 
   aOop = (arrayOop)jniCheck::validate_object(thr, jArray);
-  if (aOop == NULL || !aOop->is_array())
+  if (aOop == NULL || !aOop->is_array()) {
     ReportJNIFatalError(thr, fatal_non_array);
+  }
+  return aOop;
+}
+
+static inline arrayOop
+check_is_primitive_array(JavaThread* thr, jarray jArray) {
+  arrayOop aOop = check_is_array(thr, jArray);
 
-  if (elementType != -1) {
-    if (aOop->is_typeArray()) {
-      BasicType array_type = TypeArrayKlass::cast(aOop->klass())->element_type();
-      if (array_type != elementType)
-        ReportJNIFatalError(thr, fatal_element_type_mismatch);
-      } else if (aOop->is_objArray()) {
-        if ( T_OBJECT != elementType)
-          ReportJNIFatalError(thr, fatal_object_array_expected);
-      } else {
-        ReportJNIFatalError(thr, fatal_unknown_array_object);
-    }
+  if (!aOop->is_typeArray()) {
+     ReportJNIFatalError(thr, fatal_prim_type_array_expected);
+  }
+  return aOop;
+}
+
+static inline void
+check_primitive_array_type(JavaThread* thr, jarray jArray, BasicType elementType)
+{
+  BasicType array_type;
+  arrayOop aOop;
+
+  aOop = check_is_primitive_array(thr, jArray);
+  array_type = TypeArrayKlass::cast(aOop->klass())->element_type();
+  if (array_type != elementType) {
+    ReportJNIFatalError(thr, fatal_element_type_mismatch);
   }
 }
 
+static inline void
+check_is_obj_array(JavaThread* thr, jarray jArray) {
+  arrayOop aOop = check_is_array(thr, jArray);
+  if (!aOop->is_objArray()) {
+    ReportJNIFatalError(thr, fatal_object_array_expected);
+  }
+}
 
 oop jniCheck::validate_handle(JavaThread* thr, jobject obj) {
   if (JNIHandles::is_frame_handle(thr, obj) ||
@@ -1417,7 +1437,7 @@
                              jarray array))
     functionEnter(thr);
     IN_VM(
-      checkArray(thr, array, -1);
+      check_is_array(thr, array);
     )
     jsize result = UNCHECKED()->GetArrayLength(env,array);
     functionExit(env);
@@ -1441,7 +1461,7 @@
                                     jsize index))
     functionEnter(thr);
     IN_VM(
-      checkArray(thr, array, T_OBJECT);
+      check_is_obj_array(thr, array);
     )
     jobject result = UNCHECKED()->GetObjectArrayElement(env,array,index);
     functionExit(env);
@@ -1455,7 +1475,7 @@
                                     jobject val))
     functionEnter(thr);
     IN_VM(
-      checkArray(thr, array, T_OBJECT);
+      check_is_obj_array(thr, array);
     )
     UNCHECKED()->SetObjectArrayElement(env,array,index,val);
     functionExit(env);
@@ -1487,7 +1507,7 @@
                                          jboolean *isCopy)) \
     functionEnter(thr); \
     IN_VM( \
-      checkArray(thr, array, ElementTag); \
+      check_primitive_array_type(thr, array, ElementTag); \
     ) \
     ElementType *result = UNCHECKED()->Get##Result##ArrayElements(env, \
                                                                   array, \
@@ -1513,7 +1533,7 @@
                                              jint mode)) \
     functionEnterExceptionAllowed(thr); \
     IN_VM( \
-      checkArray(thr, array, ElementTag); \
+      check_primitive_array_type(thr, array, ElementTag); \
       ASSERT_OOPS_ALLOWED; \
       typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
       /* cannot check validity of copy, unless every request is logged by
@@ -1543,7 +1563,7 @@
                                        ElementType *buf)) \
     functionEnter(thr); \
     IN_VM( \
-      checkArray(thr, array, ElementTag); \
+      check_primitive_array_type(thr, array, ElementTag); \
     ) \
     UNCHECKED()->Get##Result##ArrayRegion(env,array,start,len,buf); \
     functionExit(env); \
@@ -1567,7 +1587,7 @@
                                        const ElementType *buf)) \
     functionEnter(thr); \
     IN_VM( \
-      checkArray(thr, array, ElementTag); \
+      check_primitive_array_type(thr, array, ElementTag); \
     ) \
     UNCHECKED()->Set##Result##ArrayRegion(env,array,start,len,buf); \
     functionExit(env); \
@@ -1669,7 +1689,7 @@
                                         jboolean *isCopy))
     functionEnterCritical(thr);
     IN_VM(
-      checkArray(thr, array, -1);
+      check_is_primitive_array(thr, array);
     )
     void *result = UNCHECKED()->GetPrimitiveArrayCritical(env, array, isCopy);
     functionExit(env);
@@ -1683,7 +1703,7 @@
                                             jint mode))
     functionEnterCriticalExceptionAllowed(thr);
     IN_VM(
-      checkArray(thr, array, -1);
+      check_is_primitive_array(thr, array);
     )
     /* The Hotspot JNI code does not use the parameters, so just check the
      * array parameter as a minor sanity check
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/share/vm/prims/jvmtiExport.cpp
--- a/hotspot/src/share/vm/prims/jvmtiExport.cpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/share/vm/prims/jvmtiExport.cpp	Wed Jul 05 19:05:35 2017 +0200
@@ -41,6 +41,7 @@
 #include "prims/jvmtiRawMonitor.hpp"
 #include "prims/jvmtiTagMap.hpp"
 #include "prims/jvmtiThreadState.inline.hpp"
+#include "prims/jvmtiRedefineClasses.hpp"
 #include "runtime/arguments.hpp"
 #include "runtime/handles.hpp"
 #include "runtime/interfaceSupport.hpp"
@@ -516,8 +517,7 @@
   jint                 _curr_len;
   unsigned char *      _curr_data;
   JvmtiEnv *           _curr_env;
-  jint *               _cached_length_ptr;
-  unsigned char **     _cached_data_ptr;
+  JvmtiCachedClassFileData ** _cached_class_file_ptr;
   JvmtiThreadState *   _state;
   KlassHandle *        _h_class_being_redefined;
   JvmtiClassLoadKind   _load_kind;
@@ -526,8 +526,7 @@
   inline JvmtiClassFileLoadHookPoster(Symbol* h_name, Handle class_loader,
                                       Handle h_protection_domain,
                                       unsigned char **data_ptr, unsigned char **end_ptr,
-                                      unsigned char **cached_data_ptr,
-                                      jint *cached_length_ptr) {
+                                      JvmtiCachedClassFileData **cache_ptr) {
     _h_name = h_name;
     _class_loader = class_loader;
     _h_protection_domain = h_protection_domain;
@@ -537,8 +536,7 @@
     _curr_len = *end_ptr - *data_ptr;
     _curr_data = *data_ptr;
     _curr_env = NULL;
-    _cached_length_ptr = cached_length_ptr;
-    _cached_data_ptr = cached_data_ptr;
+    _cached_class_file_ptr = cache_ptr;
 
     _state = _thread->jvmti_thread_state();
     if (_state != NULL) {
@@ -615,15 +613,20 @@
     }
     if (new_data != NULL) {
       // this agent has modified class data.
-      if (caching_needed && *_cached_data_ptr == NULL) {
+      if (caching_needed && *_cached_class_file_ptr == NULL) {
         // data has been changed by the new retransformable agent
         // and it hasn't already been cached, cache it
-        *_cached_data_ptr = (unsigned char *)os::malloc(_curr_len, mtInternal);
-        if (*_cached_data_ptr == NULL) {
-          vm_exit_out_of_memory(_curr_len, OOM_MALLOC_ERROR, "unable to allocate cached copy of original class bytes");
+        JvmtiCachedClassFileData *p;
+        p = (JvmtiCachedClassFileData *)os::malloc(
+          offset_of(JvmtiCachedClassFileData, data) + _curr_len, mtInternal);
+        if (p == NULL) {
+          vm_exit_out_of_memory(offset_of(JvmtiCachedClassFileData, data) + _curr_len,
+            OOM_MALLOC_ERROR,
+            "unable to allocate cached copy of original class bytes");
         }
-        memcpy(*_cached_data_ptr, _curr_data, _curr_len);
-        *_cached_length_ptr = _curr_len;
+        p->length = _curr_len;
+        memcpy(p->data, _curr_data, _curr_len);
+        *_cached_class_file_ptr = p;
       }
 
       if (_curr_data != *_data_ptr) {
@@ -662,13 +665,11 @@
                                             Handle h_protection_domain,
                                             unsigned char **data_ptr,
                                             unsigned char **end_ptr,
-                                            unsigned char **cached_data_ptr,
-                                            jint *cached_length_ptr) {
+                                            JvmtiCachedClassFileData **cache_ptr) {
   JvmtiClassFileLoadHookPoster poster(h_name, class_loader,
                                       h_protection_domain,
                                       data_ptr, end_ptr,
-                                      cached_data_ptr,
-                                      cached_length_ptr);
+                                      cache_ptr);
   poster.post();
 }
 
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/share/vm/prims/jvmtiExport.hpp
--- a/hotspot/src/share/vm/prims/jvmtiExport.hpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/share/vm/prims/jvmtiExport.hpp	Wed Jul 05 19:05:35 2017 +0200
@@ -323,8 +323,7 @@
   static void post_class_file_load_hook(Symbol* h_name, Handle class_loader,
                                         Handle h_protection_domain,
                                         unsigned char **data_ptr, unsigned char **end_ptr,
-                                        unsigned char **cached_data_ptr,
-                                        jint *cached_length_ptr) NOT_JVMTI_RETURN;
+                                        JvmtiCachedClassFileData **cache_ptr) NOT_JVMTI_RETURN;
   static void post_native_method_bind(Method* method, address* function_ptr) NOT_JVMTI_RETURN;
   static void post_compiled_method_load(nmethod *nm) NOT_JVMTI_RETURN;
   static void post_dynamic_code_generated(const char *name, const void *code_begin, const void *code_end) NOT_JVMTI_RETURN;
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/share/vm/prims/jvmtiRedefineClasses.cpp
--- a/hotspot/src/share/vm/prims/jvmtiRedefineClasses.cpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/share/vm/prims/jvmtiRedefineClasses.cpp	Wed Jul 05 19:05:35 2017 +0200
@@ -3342,9 +3342,7 @@
   // should get cleared in the_class too.
   if (the_class->get_cached_class_file_bytes() == 0) {
     // the_class doesn't have a cache yet so copy it
-    the_class->set_cached_class_file(
-      scratch_class->get_cached_class_file_bytes(),
-      scratch_class->get_cached_class_file_len());
+    the_class->set_cached_class_file(scratch_class->get_cached_class_file());
   }
 #ifndef PRODUCT
   else {
@@ -3357,7 +3355,7 @@
 
   // NULL out in scratch class to not delete twice.  The class to be redefined
   // always owns these bytes.
-  scratch_class->set_cached_class_file(NULL, 0);
+  scratch_class->set_cached_class_file(NULL);
 
   // Replace inner_classes
   Array<u2>* old_inner_classes = the_class->inner_classes();
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/share/vm/prims/jvmtiRedefineClasses.hpp
--- a/hotspot/src/share/vm/prims/jvmtiRedefineClasses.hpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/share/vm/prims/jvmtiRedefineClasses.hpp	Wed Jul 05 19:05:35 2017 +0200
@@ -331,6 +331,11 @@
 //   coordinate a cleanup of these constants with Runtime.
 //
 
+struct JvmtiCachedClassFileData {
+  jint length;
+  unsigned char data[1];
+};
+
 class VM_RedefineClasses: public VM_Operation {
  private:
   // These static fields are needed by ClassLoaderDataGraph::classes_do()
@@ -509,5 +514,12 @@
   // Modifiable test must be shared between IsModifiableClass query
   // and redefine implementation
   static bool is_modifiable_class(oop klass_mirror);
+
+  static jint get_cached_class_file_len(JvmtiCachedClassFileData *cache) {
+    return cache == NULL ? 0 : cache->length;
+  }
+  static unsigned char * get_cached_class_file_bytes(JvmtiCachedClassFileData *cache) {
+    return cache == NULL ? NULL : cache->data;
+  }
 };
 #endif // SHARE_VM_PRIMS_JVMTIREDEFINECLASSES_HPP
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/share/vm/runtime/arguments.cpp
--- a/hotspot/src/share/vm/runtime/arguments.cpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/share/vm/runtime/arguments.cpp	Wed Jul 05 19:05:35 2017 +0200
@@ -263,6 +263,7 @@
   { "UseISM",                        JDK_Version::jdk(8), JDK_Version::jdk(9) },
   { "UsePermISM",                    JDK_Version::jdk(8), JDK_Version::jdk(9) },
   { "UseMPSS",                       JDK_Version::jdk(8), JDK_Version::jdk(9) },
+  { "UseStringCache",                JDK_Version::jdk(8), JDK_Version::jdk(9) },
 #ifdef PRODUCT
   { "DesiredMethodLimit",
                            JDK_Version::jdk_update(7, 2), JDK_Version::jdk(8) },
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/share/vm/runtime/frame.cpp
--- a/hotspot/src/share/vm/runtime/frame.cpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/share/vm/runtime/frame.cpp	Wed Jul 05 19:05:35 2017 +0200
@@ -221,9 +221,20 @@
 
 
 bool frame::entry_frame_is_first() const {
-  return entry_frame_call_wrapper()->anchor()->last_Java_sp() == NULL;
+  return entry_frame_call_wrapper()->is_first_frame();
 }
 
+JavaCallWrapper* frame::entry_frame_call_wrapper_if_safe(JavaThread* thread) const {
+  JavaCallWrapper** jcw = entry_frame_call_wrapper_addr();
+  address addr = (address) jcw;
+
+  // addr must be within the usable part of the stack
+  if (thread->is_in_usable_stack(addr)) {
+    return *jcw;
+  }
+
+  return NULL;
+}
 
 bool frame::should_be_deoptimized() const {
   if (_deopt_state == is_deoptimized ||
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/share/vm/runtime/frame.hpp
--- a/hotspot/src/share/vm/runtime/frame.hpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/share/vm/runtime/frame.hpp	Wed Jul 05 19:05:35 2017 +0200
@@ -353,7 +353,9 @@
 
  public:
   // Entry frames
-  JavaCallWrapper* entry_frame_call_wrapper() const;
+  JavaCallWrapper* entry_frame_call_wrapper() const { return *entry_frame_call_wrapper_addr(); }
+  JavaCallWrapper* entry_frame_call_wrapper_if_safe(JavaThread* thread) const;
+  JavaCallWrapper** entry_frame_call_wrapper_addr() const;
   intptr_t* entry_frame_argument_at(int offset) const;
 
   // tells whether there is another chunk of Delta stack above
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/share/vm/runtime/globals.hpp
--- a/hotspot/src/share/vm/runtime/globals.hpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/share/vm/runtime/globals.hpp	Wed Jul 05 19:05:35 2017 +0200
@@ -2589,9 +2589,6 @@
   product(bool, AggressiveOpts, false,                                      \
           "Enable aggressive optimizations - see arguments.cpp")            \
                                                                             \
-  product(bool, UseStringCache, false,                                      \
-          "Enable String cache capabilities on String.java")                \
-                                                                            \
   /* statistics */                                                          \
   develop(bool, CountCompiledCalls, false,                                  \
           "counts method invocations")                                      \
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/share/vm/runtime/javaCalls.hpp
--- a/hotspot/src/share/vm/runtime/javaCalls.hpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/share/vm/runtime/javaCalls.hpp	Wed Jul 05 19:05:35 2017 +0200
@@ -80,6 +80,8 @@
   oop              receiver()               { return _receiver; }
   void             oops_do(OopClosure* f);
 
+  bool             is_first_frame() const   { return _anchor.last_Java_sp() == NULL; }
+
 };
 
 
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/share/vm/runtime/mutex.cpp
--- a/hotspot/src/share/vm/runtime/mutex.cpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/share/vm/runtime/mutex.cpp	Wed Jul 05 19:05:35 2017 +0200
@@ -1370,6 +1370,10 @@
     debug_only(if (rank() != Mutex::special) \
       thread->check_for_valid_safepoint_state(false);)
   }
+  if (thread->is_Watcher_thread()) {
+    assert(!WatcherThread::watcher_thread()->has_crash_protection(),
+        "locking not allowed when crash protection is set");
+  }
 }
 
 void Monitor::check_block_state(Thread *thread) {
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/share/vm/runtime/os.cpp
--- a/hotspot/src/share/vm/runtime/os.cpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/share/vm/runtime/os.cpp	Wed Jul 05 19:05:35 2017 +0200
@@ -595,6 +595,22 @@
   NOT_PRODUCT(inc_stat_counter(&num_mallocs, 1));
   NOT_PRODUCT(inc_stat_counter(&alloc_bytes, size));
 
+#ifdef ASSERT
+  // checking for the WatcherThread and crash_protection first
+  // since os::malloc can be called when the libjvm.{dll,so} is
+  // first loaded and we don't have a thread yet.
+  // try to find the thread after we see that the watcher thread
+  // exists and has crash protection.
+  WatcherThread *wt = WatcherThread::watcher_thread();
+  if (wt != NULL && wt->has_crash_protection()) {
+    Thread* thread = ThreadLocalStorage::get_thread_slow();
+    if (thread == wt) {
+      assert(!wt->has_crash_protection(),
+          "Can't malloc with crash protection from WatcherThread");
+    }
+  }
+#endif
+
   if (size == 0) {
     // return a valid pointer if size is zero
     // if NULL is returned the calling functions assume out of memory.
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/share/vm/runtime/os.hpp
--- a/hotspot/src/share/vm/runtime/os.hpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/share/vm/runtime/os.hpp	Wed Jul 05 19:05:35 2017 +0200
@@ -32,15 +32,18 @@
 #include "utilities/top.hpp"
 #ifdef TARGET_OS_FAMILY_linux
 # include "jvm_linux.h"
+# include <setjmp.h>
 #endif
 #ifdef TARGET_OS_FAMILY_solaris
 # include "jvm_solaris.h"
+# include <setjmp.h>
 #endif
 #ifdef TARGET_OS_FAMILY_windows
 # include "jvm_windows.h"
 #endif
 #ifdef TARGET_OS_FAMILY_bsd
 # include "jvm_bsd.h"
+# include <setjmp.h>
 #endif
 
 // os defines the interface to operating system; this includes traditional
@@ -730,6 +733,10 @@
 #include "runtime/os_ext.hpp"
 
  public:
+  class CrashProtectionCallback : public StackObj {
+  public:
+    virtual void call() = 0;
+  };
 
   // Platform dependent stuff
 #ifdef TARGET_OS_FAMILY_linux
@@ -908,6 +915,7 @@
                                 char pathSep);
   static bool set_boot_path(char fileSep, char pathSep);
   static char** split_path(const char* path, int* n);
+
 };
 
 // Note that "PAUSE" is almost always used with synchronization
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/share/vm/runtime/thread.cpp
--- a/hotspot/src/share/vm/runtime/thread.cpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/share/vm/runtime/thread.cpp	Wed Jul 05 19:05:35 2017 +0200
@@ -218,6 +218,7 @@
   // allocated data structures
   set_osthread(NULL);
   set_resource_area(new (mtThread)ResourceArea());
+  DEBUG_ONLY(_current_resource_mark = NULL;)
   set_handle_area(new (mtThread) HandleArea(NULL));
   set_metadata_handles(new (ResourceObj::C_HEAP, mtClass) GrowableArray<Metadata*>(30, true));
   set_active_handles(NULL);
@@ -953,6 +954,14 @@
 }
 
 
+bool Thread::is_in_usable_stack(address adr) const {
+  size_t stack_guard_size = os::uses_stack_guard_pages() ? (StackYellowPages + StackRedPages) * os::vm_page_size() : 0;
+  size_t usable_stack_size = _stack_size - stack_guard_size;
+
+  return ((adr < stack_base()) && (adr >= stack_base() - usable_stack_size));
+}
+
+
 // We had to move these methods here, because vm threads get into ObjectSynchronizer::enter
 // However, there is a note in JavaThread::is_lock_owned() about the VM threads not being
 // used for compilation in the future. If that change is made, the need for these methods
@@ -1217,7 +1226,7 @@
 bool WatcherThread::_startable = false;
 volatile bool  WatcherThread::_should_terminate = false;
 
-WatcherThread::WatcherThread() : Thread() {
+WatcherThread::WatcherThread() : Thread(), _crash_protection(NULL) {
   assert(watcher_thread() == NULL, "we can only allocate one WatcherThread");
   if (os::create_thread(this, os::watcher_thread)) {
     _watcher_thread = this;
@@ -3481,44 +3490,6 @@
 
     initialize_class(vmSymbols::java_lang_String(), CHECK_0);
 
-    if (AggressiveOpts) {
-      {
-        // Forcibly initialize java/util/HashMap and mutate the private
-        // static final "frontCacheEnabled" field before we start creating instances
-#ifdef ASSERT
-        Klass* tmp_k = SystemDictionary::find(vmSymbols::java_util_HashMap(), Handle(), Handle(), CHECK_0);
-        assert(tmp_k == NULL, "java/util/HashMap should not be loaded yet");
-#endif
-        Klass* k_o = SystemDictionary::resolve_or_null(vmSymbols::java_util_HashMap(), Handle(), Handle(), CHECK_0);
-        KlassHandle k = KlassHandle(THREAD, k_o);
-        guarantee(k.not_null(), "Must find java/util/HashMap");
-        instanceKlassHandle ik = instanceKlassHandle(THREAD, k());
-        ik->initialize(CHECK_0);
-        fieldDescriptor fd;
-        // Possible we might not find this field; if so, don't break
-        if (ik->find_local_field(vmSymbols::frontCacheEnabled_name(), vmSymbols::bool_signature(), &fd)) {
-          k()->java_mirror()->bool_field_put(fd.offset(), true);
-        }
-      }
-
-      if (UseStringCache) {
-        // Forcibly initialize java/lang/StringValue and mutate the private
-        // static final "stringCacheEnabled" field before we start creating instances
-        Klass* k_o = SystemDictionary::resolve_or_null(vmSymbols::java_lang_StringValue(), Handle(), Handle(), CHECK_0);
-        // Possible that StringValue isn't present: if so, silently don't break
-        if (k_o != NULL) {
-          KlassHandle k = KlassHandle(THREAD, k_o);
-          instanceKlassHandle ik = instanceKlassHandle(THREAD, k());
-          ik->initialize(CHECK_0);
-          fieldDescriptor fd;
-          // Possible we might not find this field: if so, silently don't break
-          if (ik->find_local_field(vmSymbols::stringCacheEnabled_name(), vmSymbols::bool_signature(), &fd)) {
-            k()->java_mirror()->bool_field_put(fd.offset(), true);
-          }
-        }
-      }
-    }
-
     // Initialize java_lang.System (needed before creating the thread)
     initialize_class(vmSymbols::java_lang_System(), CHECK_0);
     initialize_class(vmSymbols::java_lang_ThreadGroup(), CHECK_0);
@@ -3636,6 +3607,7 @@
 
   // Start Attach Listener if +StartAttachListener or it can't be started lazily
   if (!DisableAttachMechanism) {
+    AttachListener::vm_start();
     if (StartAttachListener || AttachListener::init_at_startup()) {
       AttachListener::init();
     }
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/share/vm/runtime/thread.hpp
--- a/hotspot/src/share/vm/runtime/thread.hpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/share/vm/runtime/thread.hpp	Wed Jul 05 19:05:35 2017 +0200
@@ -86,6 +86,8 @@
 class ThreadClosure;
 class IdealGraphPrinter;
 
+DEBUG_ONLY(class ResourceMark;)
+
 class WorkerThread;
 
 // Class hierarchy
@@ -519,6 +521,9 @@
   // Check if address is in the stack of the thread (not just for locks).
   // Warning: the method can only be used on the running thread
   bool is_in_stack(address adr) const;
+  // Check if address is in the usable part of the stack (excludes protected
+  // guard pages)
+  bool is_in_usable_stack(address adr) const;
 
   // Sets this thread as starting thread. Returns failure if thread
   // creation fails due to lack of memory, too many threads etc.
@@ -531,6 +536,8 @@
   // Thread local resource area for temporary allocation within the VM
   ResourceArea* _resource_area;
 
+  DEBUG_ONLY(ResourceMark* _current_resource_mark;)
+
   // Thread local handle area for allocation of handles within the VM
   HandleArea* _handle_area;
   GrowableArray<Metadata*>* _metadata_handles;
@@ -585,6 +592,8 @@
 
   // Deadlock detection
   bool allow_allocation()                        { return _allow_allocation_count == 0; }
+  ResourceMark* current_resource_mark()          { return _current_resource_mark; }
+  void set_current_resource_mark(ResourceMark* rm) { _current_resource_mark = rm; }
 #endif
 
   void check_for_valid_safepoint_state(bool potential_vm_operation) PRODUCT_RETURN;
@@ -724,6 +733,8 @@
 
   static bool _startable;
   volatile static bool _should_terminate; // updated without holding lock
+
+  os::WatcherThreadCrashProtection* _crash_protection;
  public:
   enum SomeConstants {
     delay_interval = 10                          // interrupt delay in milliseconds
@@ -751,6 +762,14 @@
   // Otherwise the first task to enroll will trigger the start
   static void make_startable();
 
+  void set_crash_protection(os::WatcherThreadCrashProtection* crash_protection) {
+    assert(Thread::current()->is_Watcher_thread(), "Can only be set by WatcherThread");
+    _crash_protection = crash_protection;
+  }
+
+  bool has_crash_protection() const { return _crash_protection != NULL; }
+  os::WatcherThreadCrashProtection* crash_protection() const { return _crash_protection; }
+
  private:
   int sleep() const;
 };
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/share/vm/services/attachListener.hpp
--- a/hotspot/src/share/vm/services/attachListener.hpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/share/vm/services/attachListener.hpp	Wed Jul 05 19:05:35 2017 +0200
@@ -50,6 +50,7 @@
 
 class AttachListener: AllStatic {
  public:
+  static void vm_start() NOT_SERVICES_RETURN;
   static void init()  NOT_SERVICES_RETURN;
   static void abort() NOT_SERVICES_RETURN;
 
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/share/vm/services/memTracker.cpp
--- a/hotspot/src/share/vm/services/memTracker.cpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/share/vm/services/memTracker.cpp	Wed Jul 05 19:05:35 2017 +0200
@@ -385,6 +385,7 @@
 #define SAFE_SEQUENCE_THRESHOLD    30
 #define HIGH_GENERATION_THRESHOLD  60
 #define MAX_RECORDER_THREAD_RATIO  30
+#define MAX_RECORDER_PER_THREAD    100
 
 void MemTracker::sync() {
   assert(_tracking_level > NMT_off, "NMT is not enabled");
@@ -437,6 +438,11 @@
         // means that worker thread is lagging behind in processing them.
         if (!AutoShutdownNMT) {
           _slowdown_calling_thread = (MemRecorder::_instance_count > MAX_RECORDER_THREAD_RATIO * _thread_count);
+        } else {
+          // If auto shutdown is on, enforce MAX_RECORDER_PER_THREAD threshold to prevent OOM
+          if (MemRecorder::_instance_count >= _thread_count * MAX_RECORDER_PER_THREAD) {
+            shutdown(NMT_out_of_memory);
+          }
         }
 
         // check _worker_thread with lock to avoid racing condition
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/share/vm/trace/traceDataTypes.hpp
--- a/hotspot/src/share/vm/trace/traceDataTypes.hpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/share/vm/trace/traceDataTypes.hpp	Wed Jul 05 19:05:35 2017 +0200
@@ -63,5 +63,7 @@
 typedef u8 methodid;
 typedef u8 fieldid;
 
+class TraceUnicodeString;
+
 #endif // SHARE_VM_TRACE_TRACEDATATYPES_HPP
 
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/share/vm/trace/tracetypes.xml
--- a/hotspot/src/share/vm/trace/tracetypes.xml	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/share/vm/trace/tracetypes.xml	Wed Jul 05 19:05:35 2017 +0200
@@ -55,18 +55,6 @@
               type="u8" sizeop="sizeof(u1)"/>
 
 Now we can use the content + data type in declaring event fields.
-Remember however, that for us to be able to resolve the value later we must also add
-creating the constant pool data in  VM_JFRCheckpoint::write_checkpoint
-
-   ...
-   //CGMODE
-   w->be_uint(CONTENT_TYPE_GCMODE);
-   w->be_uint(MM_GC_MODE_UNINITIALIZED);
-   for (i = 0; i < MM_GC_MODE_UNINITIALIZED; i++) {
-      w->uchar(i);
-      w->write_utf8(gcModeGetName(i));
-   }
-
  -->
 
  <types>
@@ -81,10 +69,6 @@
       <value type="OSTHREAD" field="thread" label="VM Thread"/>
     </content_type>
 
-    <!-- The first argument ("JavaThread") is misleading, it's really a
-         java.lang.Thread id (long), but Mission Control depends on the name
-         being "JavaThread" so it shouldn't be changed.
-    -->
     <content_type id="JavaThread" hr_name="Java thread"
                   type="U8" builtin_type="JAVALANGTHREAD">
       <value type="OSTHREAD" field="thread" label="OS Thread ID"/>
@@ -285,6 +269,10 @@
     <primary_type symbol="UTF8" datatype="UTF8" contenttype="NONE"
                   type="const char *" sizeop="sizeof_utf(%)"/>
 
+    <!-- UTF-16 encoded (Unicode) string, max length maxjuint -->
+    <primary_type symbol="STRING" datatype="STRING" contenttype="NONE"
+                  type="TraceUnicodeString*" sizeop="sizeof_unicode(%)"/>
+
     <!-- Symbol* constant. Note that this may currently ONLY be used by
           classes, methods fields.  This restriction might be lifted. -->
     <primary_type symbol="SYMBOL" datatype="U8" contenttype="SYMBOL"
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/share/vm/trace/xinclude.mod
--- a/hotspot/src/share/vm/trace/xinclude.mod	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/share/vm/trace/xinclude.mod	Wed Jul 05 19:05:35 2017 +0200
@@ -22,30 +22,6 @@
  questions.
   
 -->
-
-<!--
- Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
- DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
-
- This code is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License version 2 only, as
- published by the Free Software Foundation.
-
- This code is distributed in the hope that it will be useful, but WITHOUT
- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
- version 2 for more details (a copy is included in the LICENSE file that
- accompanied this code).
-
- You should have received a copy of the GNU General Public License version
- 2 along with this work; if not, write to the Free Software Foundation,
- Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
-
- Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- or visit www.oracle.com if you need additional information or have any
- questions.
-  
--->
 <!ELEMENT xi:include (xi:fallback?) >
 <!ATTLIST xi:include
     xmlns:xi   CDATA       #FIXED    "http://www.w3.org/2001/XInclude"
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/share/vm/utilities/ostream.cpp
--- a/hotspot/src/share/vm/utilities/ostream.cpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/share/vm/utilities/ostream.cpp	Wed Jul 05 19:05:35 2017 +0200
@@ -296,6 +296,7 @@
   buffer        = NEW_RESOURCE_ARRAY(char, buffer_length);
   buffer_pos    = 0;
   buffer_fixed  = false;
+  DEBUG_ONLY(rm = Thread::current()->current_resource_mark();)
 }
 
 // useful for output to fixed chunks of memory, such as performance counters
@@ -321,6 +322,8 @@
         end = buffer_length * 2;
       }
       char* oldbuf = buffer;
+      assert(rm == NULL || Thread::current()->current_resource_mark() == rm,
+             "stringStream is re-allocated with a different ResourceMark");
       buffer = NEW_RESOURCE_ARRAY(char, end);
       strncpy(buffer, oldbuf, buffer_pos);
       buffer_length = end;
diff -r c12946c8db8d -r edb01c460d4c hotspot/src/share/vm/utilities/ostream.hpp
--- a/hotspot/src/share/vm/utilities/ostream.hpp	Wed Jul 05 19:04:57 2017 +0200
+++ b/hotspot/src/share/vm/utilities/ostream.hpp	Wed Jul 05 19:05:35 2017 +0200
@@ -28,6 +28,8 @@
 #include "memory/allocation.hpp"
 #include "runtime/timer.hpp"
 
+DEBUG_ONLY(class ResourceMark;)
+
 // Output streams for printing
 //
 // Printing guidelines:
@@ -177,6 +179,7 @@
   size_t buffer_pos;
   size_t buffer_length;
   bool   buffer_fixed;
+  DEBUG_ONLY(ResourceMark* rm;)
  public:
   stringStream(size_t initial_bufsize = 256);
   stringStream(char* fixed_buffer, size_t fixed_buffer_size);
diff -r c12946c8db8d -r edb01c460d4c hotspot/test/compiler/EscapeAnalysis/Test8020215.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/compiler/EscapeAnalysis/Test8020215.java	Wed Jul 05 19:05:35 2017 +0200
@@ -0,0 +1,82 @@
+/*
+ * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8020215
+ * @summary Different execution plan when using JIT vs interpreter
+ * @run main Test8020215
+ */
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class Test8020215 {
+    public static class NamedObject {
+        public int id;
+        public String name;
+        public NamedObject(int id, String name) {
+            this.id = id;
+            this.name = name;
+        }
+    }
+
+    public static class NamedObjectList {
+        public List<NamedObject> namedObjectList = new ArrayList<NamedObject>();
+
+        public NamedObject getBest(int id) {
+            NamedObject bestObject = null;
+            for (NamedObject o : namedObjectList) {
+                bestObject = id==o.id ? getBetter(bestObject, o) : bestObject;
+            }
+            return (bestObject != null) ? bestObject : null;
+        }
+
+        private static NamedObject getBetter(NamedObject p1, NamedObject p2) {
+            return (p1 == null) ? p2 : (p2 == null) ? p1 : (p2.name.compareTo(p1.name) >= 0) ? p2 : p1;
+        }
+    }
+
+    static void test(NamedObjectList b, int i) {
+        NamedObject x = b.getBest(2);
+        // test
+        if (x == null) {
+            throw new RuntimeException("x should never be null here! (i=" + i + ")");
+        }
+    }
+
+    public static void main(String[] args) {
+        // setup
+        NamedObjectList b = new NamedObjectList();
+        for (int i = 0; i < 10000; i++) {
+            b.namedObjectList.add(new NamedObject(1, "2012-12-31"));
+        }
+        b.namedObjectList.add(new NamedObject(2, "2013-12-31"));
+
+        // execution
+        for (int i = 0; i < 12000; i++) {
+            test(b, i);
+        }
+        System.out.println("PASSED");
+    }
+}
diff -r c12946c8db8d -r edb01c460d4c hotspot/test/compiler/cpuflags/RestoreMXCSR.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/compiler/cpuflags/RestoreMXCSR.java	Wed Jul 05 19:05:35 2017 +0200
@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8020433
+ * @summary Crash when using -XX:+RestoreMXCSROnJNICalls
+ * @library /testlibrary
+ *
+ */
+import com.oracle.java.testlibrary.*;
+
+public class RestoreMXCSR {
+  public static void main(String[] args) throws Exception {
+    ProcessBuilder pb;
+    OutputAnalyzer out;
+
+    pb = ProcessTools.createJavaProcessBuilder("-XX:+RestoreMXCSROnJNICalls", "-version");
+    out = new OutputAnalyzer(pb.start());
+    out.shouldHaveExitValue(0);
+  }
+}
diff -r c12946c8db8d -r edb01c460d4c hotspot/test/compiler/membars/DekkerTest.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/compiler/membars/DekkerTest.java	Wed Jul 05 19:05:35 2017 +0200
@@ -0,0 +1,163 @@
+/*
+ * Copyright 2013 SAP AG.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/**
+ * @test
+ * @bug 8007898
+ * @summary Incorrect optimization of Memory Barriers in Matcher::post_store_load_barrier().
+ * @run main/othervm -Xbatch -XX:+IgnoreUnrecognizedVMOptions -XX:CICompilerCount=1 -XX:+StressGCM -XX:+StressLCM DekkerTest
+ * @run main/othervm -Xbatch -XX:+IgnoreUnrecognizedVMOptions -XX:CICompilerCount=1 -XX:+StressGCM -XX:+StressLCM DekkerTest
+ * @run main/othervm -Xbatch -XX:+IgnoreUnrecognizedVMOptions -XX:CICompilerCount=1 -XX:+StressGCM -XX:+StressLCM DekkerTest
+ * @author Martin Doerr martin DOT doerr AT sap DOT com
+ *
+ * Run 3 times since the failure is intermittent.
+ */
+
+public class DekkerTest {
+
+    /*
+      Read After Write Test (basically a simple Dekker test with volatile variables)
+      Derived from the original jcstress test, available at:
+        http://hg.openjdk.java.net/code-tools/jcstress/file/6c339a5aa00d/
+        tests-custom/src/main/java/org/openjdk/jcstress/tests/volatiles/DekkerTest.java
+     */
+
+    static final int ITERATIONS = 1000000;
+
+    static class TestData {
+        public volatile int a;
+        public volatile int b;
+    }
+
+    static class ResultData {
+        public int a;
+        public int b;
+    }
+
+    TestData[]   testDataArray;
+    ResultData[] results;
+
+    volatile boolean start;
+
+    public DekkerTest() {
+        testDataArray = new TestData[ITERATIONS];
+        results = new ResultData[ITERATIONS];
+        for (int i = 0; i < ITERATIONS; ++i) {
+            testDataArray[i] = new TestData();
+            results[i] = new ResultData();
+        }
+        start = false;
+    }
+
+    public void reset() {
+        for (int i = 0; i < ITERATIONS; ++i) {
+            testDataArray[i].a = 0;
+            testDataArray[i].b = 0;
+            results[i].a = 0;
+            results[i].b = 0;
+        }
+        start = false;
+    }
+
+    int actor1(TestData t) {
+        t.a = 1;
+        return t.b;
+    }
+
+    int actor2(TestData t) {
+        t.b = 1;
+        return t.a;
+    }
+
+    class Runner1 extends Thread {
+        public void run() {
+            do {} while (!start);
+            for (int i = 0; i < ITERATIONS; ++i) {
+                results[i].a = actor1(testDataArray[i]);
+            }
+        }
+    }
+
+    class Runner2 extends Thread {
+        public void run() {
+            do {} while (!start);
+            for (int i = 0; i < ITERATIONS; ++i) {
+                results[i].b = actor2(testDataArray[i]);
+            }
+        }
+    }
+
+    void testRunner() {
+        Thread thread1 = new Runner1();
+        Thread thread2 = new Runner2();
+        thread1.start();
+        thread2.start();
+        do {} while (!thread1.isAlive());
+        do {} while (!thread2.isAlive());
+        start = true;
+        Thread.yield();
+        try {
+            thread1.join();
+            thread2.join();
+        } catch (InterruptedException e) {
+            System.out.println("interrupted!");
+            System.exit(1);
+        }
+    }
+
+    boolean printResult() {
+        int[] count = new int[4];
+        for (int i = 0; i < ITERATIONS; ++i) {
+            int event_kind = (results[i].a << 1) + results[i].b;
+            ++count[event_kind];
+        }
+        if (count[0] == 0 && count[3] == 0) {
+            System.out.println("[not interesting]");
+            return false; // not interesting
+        }
+        String error = (count[0] == 0) ? " ok" : " disallowed!";
+        System.out.println("[0,0] " + count[0] + error);
+        System.out.println("[0,1] " + count[1]);
+        System.out.println("[1,0] " + count[2]);
+        System.out.println("[1,1] " + count[3]);
+        return (count[0] != 0);
+    }
+
+    public static void main(String args[]) {
+        DekkerTest test = new DekkerTest();
+        final int runs = 30;
+        int failed = 0;
+        for (int c = 0; c < runs; ++c) {
+            test.testRunner();
+            if (test.printResult()) {
+                failed++;
+            }
+            test.reset();
+        }
+        if (failed > 0) {
+            throw new InternalError("FAILED. Got " + failed + " failed ITERATIONS");
+        }
+        System.out.println("PASSED.");
+    }
+
+}
diff -r c12946c8db8d -r edb01c460d4c hotspot/test/runtime/jsig/Test8017498.sh
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/runtime/jsig/Test8017498.sh	Wed Jul 05 19:05:35 2017 +0200
@@ -0,0 +1,92 @@
+#!/bin/sh
+
+#
+#  Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
+#  DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+#
+#  This code is free software; you can redistribute it and/or modify it
+#  under the terms of the GNU General Public License version 2 only, as
+#  published by the Free Software Foundation.
+#
+#  This code is distributed in the hope that it will be useful, but WITHOUT
+#  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+#  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+#  version 2 for more details (a copy is included in the LICENSE file that
+#  accompanied this code).
+#
+#  You should have received a copy of the GNU General Public License version
+#  2 along with this work; if not, write to the Free Software Foundation,
+#  Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+#  Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+#  or visit www.oracle.com if you need additional information or have any
+#  questions.
+#
+
+##
+## @test Test8017498.sh
+## @bug 8017498
+## @bug 8020791
+## @summary sigaction(sig) results in process hang/timed-out if sig is much greater than SIGRTMAX
+## @run shell/timeout=30 Test8017498.sh
+##
+
+if [ "${TESTSRC}" = "" ]
+then
+  TESTSRC=${PWD}
+  echo "TESTSRC not set.  Using "${TESTSRC}" as default"
+fi
+echo "TESTSRC=${TESTSRC}"
+## Adding common setup Variables for running shell tests.
+. ${TESTSRC}/../../test_env.sh
+
+# set platform-dependent variables
+OS=`uname -s`
+case "$OS" in
+  Linux)
+    echo "Testing on Linux"
+    if [ "$VM_BITS" = "64" ]
+    then
+        MY_LD_PRELOAD=${TESTJAVA}${FS}jre${FS}lib${FS}amd64${FS}libjsig.so
+    else
+        MY_LD_PRELOAD=${TESTJAVA}${FS}jre${FS}lib${FS}i386${FS}libjsig.so
+    fi
+    echo MY_LD_PRELOAD = ${MY_LD_PRELOAD}
+    ;;
+  *)
+    echo "Test passed; only valid for Linux"
+    exit 0;
+    ;;
+esac
+
+THIS_DIR=.
+
+cp ${TESTSRC}${FS}*.java ${THIS_DIR}
+${TESTJAVA}${FS}bin${FS}javac *.java
+
+gcc -DLINUX -fPIC -shared \
+    -o ${TESTSRC}${FS}libTestJNI.so \
+    -I${TESTJAVA}${FS}include \
+    -I${TESTJAVA}${FS}include${FS}linux \
+    ${TESTSRC}${FS}TestJNI.c
+if [ $? != 0 ]
+then
+    echo "WARNING: the gcc command failed." 2>&1
+fi
+
+# run the java test in the background
+cmd="LD_PRELOAD=$MY_LD_PRELOAD \
+    ${TESTJAVA}${FS}bin${FS}java \
+    -Djava.library.path=${TESTSRC}${FS} -server TestJNI 100"
+echo "$cmd > test.out 2>&1"
+eval $cmd > test.out 2>&1
+
+grep "old handler" test.out > ${NULL}
+if [ $? = 0 ]
+then
+    echo "Test Passed"
+    exit 0
+fi
+
+echo "Test Failed"
+exit 1
diff -r c12946c8db8d -r edb01c460d4c hotspot/test/runtime/jsig/TestJNI.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/runtime/jsig/TestJNI.c	Wed Jul 05 19:05:35 2017 +0200
@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+#define _GNU_SOURCE // for the definition of REG_RIP in ucontext.h
+#include <stdio.h>
+#include <jni.h>
+#include <signal.h>
+#include <sys/ucontext.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void sig_handler(int sig, siginfo_t *info, ucontext_t *context) {
+    int thrNum;
+
+    printf( " HANDLER (1) " );
+    // Move forward RIP to skip failing instruction
+    context->uc_mcontext.gregs[REG_RIP] += 6;
+}
+
+JNIEXPORT void JNICALL Java_TestJNI_doSomething(JNIEnv *env, jclass klass, jint val) {
+    struct sigaction act;
+    struct sigaction oact;
+
+    act.sa_flags = SA_ONSTACK|SA_RESTART|SA_SIGINFO;
+    sigfillset(&act.sa_mask);
+    act.sa_handler = SIG_DFL;
+    act.sa_sigaction = (void (*)())sig_handler;
+    sigaction(0x20+val, &act, &oact);
+
+    printf( " doSomething(%d) " , val);
+    printf( " old handler = %p " , oact.sa_handler);
+}
+
+#ifdef __cplusplus
+}
+#endif
+
diff -r c12946c8db8d -r edb01c460d4c hotspot/test/runtime/jsig/TestJNI.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/runtime/jsig/TestJNI.java	Wed Jul 05 19:05:35 2017 +0200
@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+public class TestJNI {
+    static {
+        System.loadLibrary("TestJNI");
+    }
+    public static native void doSomething(int val);
+    public static void main(String[] args) {
+        int intArg = 43;
+        if (args.length > 0) {
+            try {
+                intArg = Integer.parseInt(args[0]);
+            } catch (NumberFormatException e) {
+                System.err.println("arg " + args[0] + " must be an integer");
+                System.exit(1);
+            }
+        }
+        TestJNI.doSomething(intArg);
+    }
+}
+
diff -r c12946c8db8d -r edb01c460d4c hotspot/test/serviceability/attach/AttachWithStalePidFile.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/serviceability/attach/AttachWithStalePidFile.java	Wed Jul 05 19:05:35 2017 +0200
@@ -0,0 +1,139 @@
+/*
+ * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 7162400
+ * @key regression
+ * @summary Regression test for attach issue where stale pid files in /tmp lead to connection issues
+ * @library /testlibrary
+ * @compile AttachWithStalePidFileTarget.java
+ * @run main AttachWithStalePidFile
+ */
+
+import com.oracle.java.testlibrary.*;
+import com.sun.tools.attach.VirtualMachine;
+import sun.tools.attach.HotSpotVirtualMachine;
+import java.lang.reflect.Field;
+import java.nio.file.*;
+import java.nio.file.attribute.*;
+import java.io.*;
+
+public class AttachWithStalePidFile {
+  public static void main(String... args) throws Exception {
+
+    // this test is only valid on non-Windows platforms
+    if(Platform.isWindows()) {
+      System.out.println("This test is only valid on non-Windows platforms.");
+      return;
+    }
+
+    // Since there might be stale pid-files owned by different
+    // users on the system we may need to retry the test in case we
+    // are unable to remove the existing file.
+    int retries = 5;
+    while(!runTest() && --retries > 0);
+
+    if(retries == 0) {
+      throw new RuntimeException("Test failed after 5 retries. " +
+        "Remove any /tmp/.java_pid* files and retry.");
+    }
+  }
+
+  public static boolean runTest() throws Exception {
+    ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
+      "-XX:+UnlockDiagnosticVMOptions", "-XX:+PauseAtStartup", "AttachWithStalePidFileTarget");
+    Process target = pb.start();
+    Path pidFile = null;
+
+    try {
+      int pid = getUnixProcessId(target);
+
+      // create the stale .java_pid file. use hard-coded /tmp path as in th VM
+      pidFile = createJavaPidFile(pid);
+      if(pidFile == null) {
+        return false;
+      }
+
+      // wait for vm.paused file to be created and delete it once we find it.
+      waitForAndResumeVM(pid);
+
+      // unfortunately there's no reliable way to know the VM is ready to receive the
+      // attach request so we have to do an arbitrary sleep.
+      Thread.sleep(5000);
+
+      HotSpotVirtualMachine vm = (HotSpotVirtualMachine)VirtualMachine.attach(((Integer)pid).toString());
+      BufferedReader remoteDataReader = new BufferedReader(new InputStreamReader(vm.remoteDataDump()));
+      String line = null;
+      while((line = remoteDataReader.readLine()) != null);
+
+      vm.detach();
+      return true;
+    }
+    finally {
+      target.destroy();
+      target.waitFor();
+
+      if(pidFile != null && Files.exists(pidFile)) {
+        Files.delete(pidFile);
+      }
+    }
+  }
+
+  private static Path createJavaPidFile(int pid) throws Exception {
+    Path pidFile = Paths.get("/tmp/.java_pid" + pid);
+    if(Files.exists(pidFile)) {
+      try {
+        Files.delete(pidFile);
+      }
+      catch(FileSystemException e) {
+        if(e.getReason().equals("Operation not permitted")) {
+          System.out.println("Unable to remove exisiting stale PID file" + pidFile);
+          return null;
+        }
+        throw e;
+      }
+    }
+    return Files.createFile(pidFile,
+      PosixFilePermissions.asFileAttribute(PosixFilePermissions.fromString("rw-------")));
+  }
+
+  private static void waitForAndResumeVM(int pid) throws Exception {
+    Path pauseFile = Paths.get("vm.paused." + pid);
+    int retries = 60;
+    while(!Files.exists(pauseFile) && --retries > 0) {
+      Thread.sleep(1000);
+    }
+    if(retries == 0) {
+      throw new RuntimeException("Timeout waiting for VM to start. " +
+        "vm.paused file not created within 60 seconds.");
+    }
+    Files.delete(pauseFile);
+  }
+
+  private static int getUnixProcessId(Process unixProcess) throws Exception {
+    Field pidField = unixProcess.getClass().getDeclaredField("pid");
+    pidField.setAccessible(true);
+    return (Integer)pidField.get(unixProcess);
+  }
+}
diff -r c12946c8db8d -r edb01c460d4c hotspot/test/serviceability/attach/AttachWithStalePidFileTarget.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/serviceability/attach/AttachWithStalePidFileTarget.java	Wed Jul 05 19:05:35 2017 +0200
@@ -0,0 +1,27 @@
+/*
+ * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+public class AttachWithStalePidFileTarget {
+  public static void main(String... args) throws Exception {
+    Thread.sleep(2*60*1000);
+  }
+}
diff -r c12946c8db8d -r edb01c460d4c jaxp/.hgtags
--- a/jaxp/.hgtags	Wed Jul 05 19:04:57 2017 +0200
+++ b/jaxp/.hgtags	Wed Jul 05 19:05:35 2017 +0200
@@ -221,3 +221,4 @@
 6c830db28d21108f32af990ecf4d80a75887980d jdk8-b97
 15e5bb51bc0cd89304dc2f7f29b4c8002e632353 jdk8-b98
 adf49c3ef83c160d53ece623049b2cdccaf78fc7 jdk8-b99
+5d1974c1d7b9a86431bc253dc5a6a52d4586622e jdk8-b100
diff -r c12946c8db8d -r edb01c460d4c jaxws/.hgtags
--- a/jaxws/.hgtags	Wed Jul 05 19:04:57 2017 +0200
+++ b/jaxws/.hgtags	Wed Jul 05 19:05:35 2017 +0200
@@ -221,3 +221,4 @@
 dcde7f049111353ad23175f54985a4f6bfea720c jdk8-b97
 b1fb4612a2caea52b5661b87509e560fa044b194 jdk8-b98
 8ef83d4b23c933935e28f59b282cea920b1b1f5f jdk8-b99
+4fd722afae5c02f00bbd44c3a34425ee474afb1c jdk8-b100
diff -r c12946c8db8d -r edb01c460d4c jdk/.hgtags
--- a/jdk/.hgtags	Wed Jul 05 19:04:57 2017 +0200
+++ b/jdk/.hgtags	Wed Jul 05 19:05:35 2017 +0200
@@ -221,3 +221,4 @@
 978a95239044f26dcc8a6d59246be07ad6ca6be2 jdk8-b97
 c4908732fef5235f1b98cafe0ce507771ef7892c jdk8-b98
 6a099a36589bd933957272ba63e5263bede29971 jdk8-b99
+5be9c5bfcfe9b2a40412b4fb364377d49de014eb jdk8-b100
diff -r c12946c8db8d -r edb01c460d4c langtools/.hgtags
--- a/langtools/.hgtags	Wed Jul 05 19:04:57 2017 +0200
+++ b/langtools/.hgtags	Wed Jul 05 19:05:35 2017 +0200
@@ -221,3 +221,4 @@
 6a11a81a8824c17f6cd2ec8f8492e1229b694e96 jdk8-b97
 ce5a90df517bdceb2739d7dd3e6764b070def802 jdk8-b98
 6d85acab769eb79bc058f5640fa86a6ef096a583 jdk8-b99
+82f68da70e471ee5640016e3f38c014347a5c785 jdk8-b100
diff -r c12946c8db8d -r edb01c460d4c nashorn/.hgtags
--- a/nashorn/.hgtags	Wed Jul 05 19:04:57 2017 +0200
+++ b/nashorn/.hgtags	Wed Jul 05 19:05:35 2017 +0200
@@ -209,3 +209,4 @@
 1bf1d6ce30427e1f9dc1ada18db409d1f14d99fe jdk8-b97
 542b7803f0389a91fab58608a0f46fac0e15d759 jdk8-b98
 10a1ab9e20a42d278aa1a89698f2a4cf5883d00d jdk8-b99
+598321c438b52d9408a2671fb3fc2b2947d0f654 jdk8-b100