jdk-sandbox: comparison src/hotspot/share/code/nmethod.cpp

equal deleted inserted replaced

-:4ebc2e2fb97c
+:71c04702a3d5
+/*
+* Copyright (c) 1997, 2017, 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.
+*
+*/
+#include "precompiled.hpp"
+#include "code/codeCache.hpp"
+#include "code/compiledIC.hpp"
+#include "code/dependencies.hpp"
+#include "code/nativeInst.hpp"
+#include "code/nmethod.hpp"
+#include "code/scopeDesc.hpp"
+#include "compiler/abstractCompiler.hpp"
+#include "compiler/compileBroker.hpp"
+#include "compiler/compileLog.hpp"
+#include "compiler/compilerDirectives.hpp"
+#include "compiler/directivesParser.hpp"
+#include "compiler/disassembler.hpp"
+#include "interpreter/bytecode.hpp"
+#include "logging/log.hpp"
+#include "logging/logStream.hpp"
+#include "memory/resourceArea.hpp"
+#include "oops/methodData.hpp"
+#include "oops/oop.inline.hpp"
+#include "prims/jvm.h"
+#include "prims/jvmtiImpl.hpp"
+#include "runtime/atomic.hpp"
+#include "runtime/orderAccess.inline.hpp"
+#include "runtime/os.hpp"
+#include "runtime/sharedRuntime.hpp"
+#include "runtime/sweeper.hpp"
+#include "utilities/align.hpp"
+#include "utilities/dtrace.hpp"
+#include "utilities/events.hpp"
+#include "utilities/resourceHash.hpp"
+#include "utilities/xmlstream.hpp"
+#ifdef SHARK
+#include "shark/sharkCompiler.hpp"
+#endif
+#if INCLUDE_JVMCI
+#include "jvmci/jvmciJavaClasses.hpp"
+#endif
+#ifdef DTRACE_ENABLED
+// Only bother with this argument setup if dtrace is available
+#define DTRACE_METHOD_UNLOAD_PROBE(method)                                \
+{                                                                       \
+Method* m = (method);                                                 \
+if (m != NULL) {                                                      \
+Symbol* klass_name = m->klass_name();                               \
+Symbol* name = m->name();                                           \
+Symbol* signature = m->signature();                                 \
+HOTSPOT_COMPILED_METHOD_UNLOAD(                                     \
+(char *) klass_name->bytes(), klass_name->utf8_length(),                   \
+(char *) name->bytes(), name->utf8_length(),                               \
+(char *) signature->bytes(), signature->utf8_length());                    \
+}                                                                     \
+}
+#else //  ndef DTRACE_ENABLED
+#define DTRACE_METHOD_UNLOAD_PROBE(method)
+#endif
+//---------------------------------------------------------------------------------
+// NMethod statistics
+// They are printed under various flags, including:
+//   PrintC1Statistics, PrintOptoStatistics, LogVMOutput, and LogCompilation.
+// (In the latter two cases, they like other stats are printed to the log only.)
+#ifndef PRODUCT
+// These variables are put into one block to reduce relocations
+// and make it simpler to print from the debugger.
+struct java_nmethod_stats_struct {
+int nmethod_count;
+int total_size;
+int relocation_size;
+int consts_size;
+int insts_size;
+int stub_size;
+int scopes_data_size;
+int scopes_pcs_size;
+int dependencies_size;
+int handler_table_size;
+int nul_chk_table_size;
+int oops_size;
+int metadata_size;
+void note_nmethod(nmethod* nm) {
+nmethod_count += 1;
+total_size          += nm->size();
+relocation_size     += nm->relocation_size();
+consts_size         += nm->consts_size();
+insts_size          += nm->insts_size();
+stub_size           += nm->stub_size();
+oops_size           += nm->oops_size();
+metadata_size       += nm->metadata_size();
+scopes_data_size    += nm->scopes_data_size();
+scopes_pcs_size     += nm->scopes_pcs_size();
+dependencies_size   += nm->dependencies_size();
+handler_table_size  += nm->handler_table_size();
+nul_chk_table_size  += nm->nul_chk_table_size();
+}
+void print_nmethod_stats(const char* name) {
+if (nmethod_count == 0)  return;
+tty->print_cr("Statistics for %d bytecoded nmethods for %s:", nmethod_count, name);
+if (total_size != 0)          tty->print_cr(" total in heap  = %d", total_size);
+if (nmethod_count != 0)       tty->print_cr(" header         = " SIZE_FORMAT, nmethod_count * sizeof(nmethod));
+if (relocation_size != 0)     tty->print_cr(" relocation     = %d", relocation_size);
+if (consts_size != 0)         tty->print_cr(" constants      = %d", consts_size);
+if (insts_size != 0)          tty->print_cr(" main code      = %d", insts_size);
+if (stub_size != 0)           tty->print_cr(" stub code      = %d", stub_size);
+if (oops_size != 0)           tty->print_cr(" oops           = %d", oops_size);
+if (metadata_size != 0)       tty->print_cr(" metadata       = %d", metadata_size);
+if (scopes_data_size != 0)    tty->print_cr(" scopes data    = %d", scopes_data_size);
+if (scopes_pcs_size != 0)     tty->print_cr(" scopes pcs     = %d", scopes_pcs_size);
+if (dependencies_size != 0)   tty->print_cr(" dependencies   = %d", dependencies_size);
+if (handler_table_size != 0)  tty->print_cr(" handler table  = %d", handler_table_size);
+if (nul_chk_table_size != 0)  tty->print_cr(" nul chk table  = %d", nul_chk_table_size);
+}
+};
+struct native_nmethod_stats_struct {
+int native_nmethod_count;
+int native_total_size;
+int native_relocation_size;
+int native_insts_size;
+int native_oops_size;
+int native_metadata_size;
+void note_native_nmethod(nmethod* nm) {
+native_nmethod_count += 1;
+native_total_size       += nm->size();
+native_relocation_size  += nm->relocation_size();
+native_insts_size       += nm->insts_size();
+native_oops_size        += nm->oops_size();
+native_metadata_size    += nm->metadata_size();
+}
+void print_native_nmethod_stats() {
+if (native_nmethod_count == 0)  return;
+tty->print_cr("Statistics for %d native nmethods:", native_nmethod_count);
+if (native_total_size != 0)       tty->print_cr(" N. total size  = %d", native_total_size);
+if (native_relocation_size != 0)  tty->print_cr(" N. relocation  = %d", native_relocation_size);
+if (native_insts_size != 0)       tty->print_cr(" N. main code   = %d", native_insts_size);
+if (native_oops_size != 0)        tty->print_cr(" N. oops        = %d", native_oops_size);
+if (native_metadata_size != 0)    tty->print_cr(" N. metadata    = %d", native_metadata_size);
+}
+};
+struct pc_nmethod_stats_struct {
+int pc_desc_resets;   // number of resets (= number of caches)
+int pc_desc_queries;  // queries to nmethod::find_pc_desc
+int pc_desc_approx;   // number of those which have approximate true
+int pc_desc_repeats;  // number of _pc_descs[0] hits
+int pc_desc_hits;     // number of LRU cache hits
+int pc_desc_tests;    // total number of PcDesc examinations
+int pc_desc_searches; // total number of quasi-binary search steps
+int pc_desc_adds;     // number of LUR cache insertions
+void print_pc_stats() {
+tty->print_cr("PcDesc Statistics:  %d queries, %.2f comparisons per query",
+pc_desc_queries,
+(double)(pc_desc_tests + pc_desc_searches)
+/ pc_desc_queries);
+tty->print_cr("  caches=%d queries=%d/%d, hits=%d+%d, tests=%d+%d, adds=%d",
+pc_desc_resets,
+pc_desc_queries, pc_desc_approx,
+pc_desc_repeats, pc_desc_hits,
+pc_desc_tests, pc_desc_searches, pc_desc_adds);
+}
+};
+#ifdef COMPILER1
+static java_nmethod_stats_struct c1_java_nmethod_stats;
+#endif
+#ifdef COMPILER2
+static java_nmethod_stats_struct c2_java_nmethod_stats;
+#endif
+#if INCLUDE_JVMCI
+static java_nmethod_stats_struct jvmci_java_nmethod_stats;
+#endif
+#ifdef SHARK
+static java_nmethod_stats_struct shark_java_nmethod_stats;
+#endif
+static java_nmethod_stats_struct unknown_java_nmethod_stats;
+static native_nmethod_stats_struct native_nmethod_stats;
+static pc_nmethod_stats_struct pc_nmethod_stats;
+static void note_java_nmethod(nmethod* nm) {
+#ifdef COMPILER1
+if (nm->is_compiled_by_c1()) {
+c1_java_nmethod_stats.note_nmethod(nm);
+} else
+#endif
+#ifdef COMPILER2
+if (nm->is_compiled_by_c2()) {
+c2_java_nmethod_stats.note_nmethod(nm);
+} else
+#endif
+#if INCLUDE_JVMCI
+if (nm->is_compiled_by_jvmci()) {
+jvmci_java_nmethod_stats.note_nmethod(nm);
+} else
+#endif
+#ifdef SHARK
+if (nm->is_compiled_by_shark()) {
+shark_java_nmethod_stats.note_nmethod(nm);
+} else
+#endif
+{
+unknown_java_nmethod_stats.note_nmethod(nm);
+}
+}
+#endif // !PRODUCT
+//---------------------------------------------------------------------------------
+ExceptionCache::ExceptionCache(Handle exception, address pc, address handler) {
+assert(pc != NULL, "Must be non null");
+assert(exception.not_null(), "Must be non null");
+assert(handler != NULL, "Must be non null");
+_count = 0;
+_exception_type = exception->klass();
+_next = NULL;
+add_address_and_handler(pc,handler);
+}
+address ExceptionCache::match(Handle exception, address pc) {
+assert(pc != NULL,"Must be non null");
+assert(exception.not_null(),"Must be non null");
+if (exception->klass() == exception_type()) {
+return (test_address(pc));
+}
+return NULL;
+}
+bool ExceptionCache::match_exception_with_space(Handle exception) {
+assert(exception.not_null(),"Must be non null");
+if (exception->klass() == exception_type() && count() < cache_size) {
+return true;
+}
+return false;
+}
+address ExceptionCache::test_address(address addr) {
+int limit = count();
+for (int i = 0; i < limit; i++) {
+if (pc_at(i) == addr) {
+return handler_at(i);
+}
+}
+return NULL;
+}
+bool ExceptionCache::add_address_and_handler(address addr, address handler) {
+if (test_address(addr) == handler) return true;
+int index = count();
+if (index < cache_size) {
+set_pc_at(index, addr);
+set_handler_at(index, handler);
+increment_count();
+return true;
+}
+return false;
+}
+//-----------------------------------------------------------------------------
+// Helper used by both find_pc_desc methods.
+static inline bool match_desc(PcDesc* pc, int pc_offset, bool approximate) {
+NOT_PRODUCT(++pc_nmethod_stats.pc_desc_tests);
+if (!approximate)
+return pc->pc_offset() == pc_offset;
+else
+return (pc-1)->pc_offset() < pc_offset && pc_offset <= pc->pc_offset();
+}
+void PcDescCache::reset_to(PcDesc* initial_pc_desc) {
+if (initial_pc_desc == NULL) {
+_pc_descs[0] = NULL; // native method; no PcDescs at all
+return;
+}
+NOT_PRODUCT(++pc_nmethod_stats.pc_desc_resets);
+// reset the cache by filling it with benign (non-null) values
+assert(initial_pc_desc->pc_offset() < 0, "must be sentinel");
+for (int i = 0; i < cache_size; i++)
+_pc_descs[i] = initial_pc_desc;
+}
+PcDesc* PcDescCache::find_pc_desc(int pc_offset, bool approximate) {
+NOT_PRODUCT(++pc_nmethod_stats.pc_desc_queries);
+NOT_PRODUCT(if (approximate) ++pc_nmethod_stats.pc_desc_approx);
+// Note: one might think that caching the most recently
+// read value separately would be a win, but one would be
+// wrong.  When many threads are updating it, the cache
+// line it's in would bounce between caches, negating
+// any benefit.
+// In order to prevent race conditions do not load cache elements
+// repeatedly, but use a local copy:
+PcDesc* res;
+// Step one:  Check the most recently added value.
+res = _pc_descs[0];
+if (res == NULL) return NULL;  // native method; no PcDescs at all
+if (match_desc(res, pc_offset, approximate)) {
+NOT_PRODUCT(++pc_nmethod_stats.pc_desc_repeats);
+return res;
+}
+// Step two:  Check the rest of the LRU cache.
+for (int i = 1; i < cache_size; ++i) {
+res = _pc_descs[i];
+if (res->pc_offset() < 0) break;  // optimization: skip empty cache
+if (match_desc(res, pc_offset, approximate)) {
+NOT_PRODUCT(++pc_nmethod_stats.pc_desc_hits);
+return res;
+}
+}
+// Report failure.
+return NULL;
+}
+void PcDescCache::add_pc_desc(PcDesc* pc_desc) {
+NOT_PRODUCT(++pc_nmethod_stats.pc_desc_adds);
+// Update the LRU cache by shifting pc_desc forward.
+for (int i = 0; i < cache_size; i++)  {
+PcDesc* next = _pc_descs[i];
+_pc_descs[i] = pc_desc;
+pc_desc = next;
+}
+}
+// adjust pcs_size so that it is a multiple of both oopSize and
+// sizeof(PcDesc) (assumes that if sizeof(PcDesc) is not a multiple
+// of oopSize, then 2*sizeof(PcDesc) is)
+static int adjust_pcs_size(int pcs_size) {
+int nsize = align_up(pcs_size,   oopSize);
+if ((nsize % sizeof(PcDesc)) != 0) {
+nsize = pcs_size + sizeof(PcDesc);
+}
+assert((nsize % oopSize) == 0, "correct alignment");
+return nsize;
+}
+int nmethod::total_size() const {
+return
+consts_size()        +
+insts_size()         +
+stub_size()          +
+scopes_data_size()   +
+scopes_pcs_size()    +
+handler_table_size() +
+nul_chk_table_size();
+}
+const char* nmethod::compile_kind() const {
+if (is_osr_method())     return "osr";
+if (method() != NULL && is_native_method())  return "c2n";
+return NULL;
+}
+// Fill in default values for various flag fields
+void nmethod::init_defaults() {
+_state                      = in_use;
+_has_flushed_dependencies   = 0;
+_lock_count                 = 0;
+_stack_traversal_mark       = 0;
+_unload_reported            = false; // jvmti state
+_is_far_code                = false; // nmethods are located in CodeCache
+#ifdef ASSERT
+_oops_are_stale             = false;
+#endif
+_oops_do_mark_link       = NULL;
+_jmethod_id              = NULL;
+_osr_link                = NULL;
+if (UseG1GC) {
+_unloading_next        = NULL;
+} else {
+_scavenge_root_link    = NULL;
+}
+_scavenge_root_state     = 0;
+#if INCLUDE_RTM_OPT
+_rtm_state               = NoRTM;
+#endif
+#if INCLUDE_JVMCI
+_jvmci_installed_code   = NULL;
+_speculation_log        = NULL;
+#endif
+}
+nmethod* nmethod::new_native_nmethod(const methodHandle& method,
+int compile_id,
+CodeBuffer *code_buffer,
+int vep_offset,
+int frame_complete,
+int frame_size,
+ByteSize basic_lock_owner_sp_offset,
+ByteSize basic_lock_sp_offset,
+OopMapSet* oop_maps) {
+code_buffer->finalize_oop_references(method);
+// create nmethod
+nmethod* nm = NULL;
+{
+MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
+int native_nmethod_size = CodeBlob::allocation_size(code_buffer, sizeof(nmethod));
+CodeOffsets offsets;
+offsets.set_value(CodeOffsets::Verified_Entry, vep_offset);
+offsets.set_value(CodeOffsets::Frame_Complete, frame_complete);
+nm = new (native_nmethod_size, CompLevel_none) nmethod(method(), compiler_none, native_nmethod_size,
+compile_id, &offsets,
+code_buffer, frame_size,
+basic_lock_owner_sp_offset,
+basic_lock_sp_offset, oop_maps);
+NOT_PRODUCT(if (nm != NULL)  native_nmethod_stats.note_native_nmethod(nm));
+}
+// verify nmethod
+debug_only(if (nm) nm->verify();) // might block
+if (nm != NULL) {
+nm->log_new_nmethod();
+}
+return nm;
+}
+nmethod* nmethod::new_nmethod(const methodHandle& method,
+int compile_id,
+int entry_bci,
+CodeOffsets* offsets,
+int orig_pc_offset,
+DebugInformationRecorder* debug_info,
+Dependencies* dependencies,
+CodeBuffer* code_buffer, int frame_size,
+OopMapSet* oop_maps,
+ExceptionHandlerTable* handler_table,
+ImplicitExceptionTable* nul_chk_table,
+AbstractCompiler* compiler,
+int comp_level
+#if INCLUDE_JVMCI
+, Handle installed_code,
+Handle speculationLog
+#endif
+)
+{
+assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR");
+code_buffer->finalize_oop_references(method);
+// create nmethod
+nmethod* nm = NULL;
+{ MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
+int nmethod_size =
+CodeBlob::allocation_size(code_buffer, sizeof(nmethod))
++ adjust_pcs_size(debug_info->pcs_size())
++ align_up((int)dependencies->size_in_bytes(), oopSize)
++ align_up(handler_table->size_in_bytes()    , oopSize)
++ align_up(nul_chk_table->size_in_bytes()    , oopSize)
++ align_up(debug_info->data_size()           , oopSize);
+nm = new (nmethod_size, comp_level)
+nmethod(method(), compiler->type(), nmethod_size, compile_id, entry_bci, offsets,
+orig_pc_offset, debug_info, dependencies, code_buffer, frame_size,
+oop_maps,
+handler_table,
+nul_chk_table,
+compiler,
+comp_level
+#if INCLUDE_JVMCI
+, installed_code,
+speculationLog
+#endif
+);
+if (nm != NULL) {
+// To make dependency checking during class loading fast, record
+// the nmethod dependencies in the classes it is dependent on.
+// This allows the dependency checking code to simply walk the
+// class hierarchy above the loaded class, checking only nmethods
+// which are dependent on those classes.  The slow way is to
+// check every nmethod for dependencies which makes it linear in
+// the number of methods compiled.  For applications with a lot
+// classes the slow way is too slow.
+for (Dependencies::DepStream deps(nm); deps.next(); ) {
+if (deps.type() == Dependencies::call_site_target_value) {
+// CallSite dependencies are managed on per-CallSite instance basis.
+oop call_site = deps.argument_oop(0);
+MethodHandles::add_dependent_nmethod(call_site, nm);
+} else {
+Klass* klass = deps.context_type();
+if (klass == NULL) {
+continue;  // ignore things like evol_method
+}
+// record this nmethod as dependent on this klass
+InstanceKlass::cast(klass)->add_dependent_nmethod(nm);
+}
+}
+NOT_PRODUCT(if (nm != NULL)  note_java_nmethod(nm));
+}
+}
+// Do verification and logging outside CodeCache_lock.
+if (nm != NULL) {
+// Safepoints in nmethod::verify aren't allowed because nm hasn't been installed yet.
+DEBUG_ONLY(nm->verify();)
+nm->log_new_nmethod();
+}
+return nm;
+}
+// For native wrappers
+nmethod::nmethod(
+Method* method,
+CompilerType type,
+int nmethod_size,
+int compile_id,
+CodeOffsets* offsets,
+CodeBuffer* code_buffer,
+int frame_size,
+ByteSize basic_lock_owner_sp_offset,
+ByteSize basic_lock_sp_offset,
+OopMapSet* oop_maps )
+: CompiledMethod(method, "native nmethod", type, nmethod_size, sizeof(nmethod), code_buffer, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps, false),
+_native_receiver_sp_offset(basic_lock_owner_sp_offset),
+_native_basic_lock_sp_offset(basic_lock_sp_offset)
+{
+{
+int scopes_data_offset = 0;
+int deoptimize_offset       = 0;
+int deoptimize_mh_offset    = 0;
+debug_only(NoSafepointVerifier nsv;)
+assert_locked_or_safepoint(CodeCache_lock);
+init_defaults();
+_entry_bci               = InvocationEntryBci;
+// We have no exception handler or deopt handler make the
+// values something that will never match a pc like the nmethod vtable entry
+_exception_offset        = 0;
+_orig_pc_offset          = 0;
+_consts_offset           = data_offset();
+_stub_offset             = data_offset();
+_oops_offset             = data_offset();
+_metadata_offset         = _oops_offset         + align_up(code_buffer->total_oop_size(), oopSize);
+scopes_data_offset       = _metadata_offset     + align_up(code_buffer->total_metadata_size(), wordSize);
+_scopes_pcs_offset       = scopes_data_offset;
+_dependencies_offset     = _scopes_pcs_offset;
+_handler_table_offset    = _dependencies_offset;
+_nul_chk_table_offset    = _handler_table_offset;
+_nmethod_end_offset      = _nul_chk_table_offset;
+_compile_id              = compile_id;
+_comp_level              = CompLevel_none;
+_entry_point             = code_begin()          + offsets->value(CodeOffsets::Entry);
+_verified_entry_point    = code_begin()          + offsets->value(CodeOffsets::Verified_Entry);
+_osr_entry_point         = NULL;
+_exception_cache         = NULL;
+_pc_desc_container.reset_to(NULL);
+_hotness_counter         = NMethodSweeper::hotness_counter_reset_val();
+_scopes_data_begin = (address) this + scopes_data_offset;
+_deopt_handler_begin = (address) this + deoptimize_offset;
+_deopt_mh_handler_begin = (address) this + deoptimize_mh_offset;
+code_buffer->copy_code_and_locs_to(this);
+code_buffer->copy_values_to(this);
+if (ScavengeRootsInCode) {
+if (detect_scavenge_root_oops()) {
+CodeCache::add_scavenge_root_nmethod(this);
+}
+Universe::heap()->register_nmethod(this);
+}
+debug_only(verify_scavenge_root_oops());
+CodeCache::commit(this);
+}
+if (PrintNativeNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) {
+ttyLocker ttyl;  // keep the following output all in one block
+// This output goes directly to the tty, not the compiler log.
+// To enable tools to match it up with the compilation activity,
+// be sure to tag this tty output with the compile ID.
+if (xtty != NULL) {
+xtty->begin_head("print_native_nmethod");
+xtty->method(_method);
+xtty->stamp();
+xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this);
+}
+// print the header part first
+print();
+// then print the requested information
+if (PrintNativeNMethods) {
+print_code();
+if (oop_maps != NULL) {
+oop_maps->print();
+}
+}
+if (PrintRelocations) {
+print_relocations();
+}
+if (xtty != NULL) {
+xtty->tail("print_native_nmethod");
+}
+}
+}
+void* nmethod::operator new(size_t size, int nmethod_size, int comp_level) throw () {
+return CodeCache::allocate(nmethod_size, CodeCache::get_code_blob_type(comp_level));
+}
+nmethod::nmethod(
+Method* method,
+CompilerType type,
+int nmethod_size,
+int compile_id,
+int entry_bci,
+CodeOffsets* offsets,
+int orig_pc_offset,
+DebugInformationRecorder* debug_info,
+Dependencies* dependencies,
+CodeBuffer *code_buffer,
+int frame_size,
+OopMapSet* oop_maps,
+ExceptionHandlerTable* handler_table,
+ImplicitExceptionTable* nul_chk_table,
+AbstractCompiler* compiler,
+int comp_level
+#if INCLUDE_JVMCI
+, Handle installed_code,
+Handle speculation_log
+#endif
+)
+: CompiledMethod(method, "nmethod", type, nmethod_size, sizeof(nmethod), code_buffer, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps, false),
+_native_receiver_sp_offset(in_ByteSize(-1)),
+_native_basic_lock_sp_offset(in_ByteSize(-1))
+{
+assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR");
+{
+debug_only(NoSafepointVerifier nsv;)
+assert_locked_or_safepoint(CodeCache_lock);
+_deopt_handler_begin = (address) this;
+_deopt_mh_handler_begin = (address) this;
+init_defaults();
+_entry_bci               = entry_bci;
+_compile_id              = compile_id;
+_comp_level              = comp_level;
+_orig_pc_offset          = orig_pc_offset;
+_hotness_counter         = NMethodSweeper::hotness_counter_reset_val();
+// Section offsets
+_consts_offset           = content_offset()      + code_buffer->total_offset_of(code_buffer->consts());
+_stub_offset             = content_offset()      + code_buffer->total_offset_of(code_buffer->stubs());
+set_ctable_begin(header_begin() + _consts_offset);
+#if INCLUDE_JVMCI
+_jvmci_installed_code = installed_code();
+_speculation_log = (instanceOop)speculation_log();
+if (compiler->is_jvmci()) {
+// JVMCI might not produce any stub sections
+if (offsets->value(CodeOffsets::Exceptions) != -1) {
+_exception_offset        = code_offset()          + offsets->value(CodeOffsets::Exceptions);
+} else {
+_exception_offset = -1;
+}
+if (offsets->value(CodeOffsets::Deopt) != -1) {
+_deopt_handler_begin       = (address) this + code_offset()          + offsets->value(CodeOffsets::Deopt);
+} else {
+_deopt_handler_begin = NULL;
+}
+if (offsets->value(CodeOffsets::DeoptMH) != -1) {
+_deopt_mh_handler_begin  = (address) this + code_offset()          + offsets->value(CodeOffsets::DeoptMH);
+} else {
+_deopt_mh_handler_begin = NULL;
+}
+} else {
+#endif
+// Exception handler and deopt handler are in the stub section
+assert(offsets->value(CodeOffsets::Exceptions) != -1, "must be set");
+assert(offsets->value(CodeOffsets::Deopt     ) != -1, "must be set");
+_exception_offset       = _stub_offset          + offsets->value(CodeOffsets::Exceptions);
+_deopt_handler_begin    = (address) this + _stub_offset          + offsets->value(CodeOffsets::Deopt);
+if (offsets->value(CodeOffsets::DeoptMH) != -1) {
+_deopt_mh_handler_begin  = (address) this + _stub_offset          + offsets->value(CodeOffsets::DeoptMH);
+} else {
+_deopt_mh_handler_begin  = NULL;
+#if INCLUDE_JVMCI
+}
+#endif
+}
+if (offsets->value(CodeOffsets::UnwindHandler) != -1) {
+_unwind_handler_offset = code_offset()         + offsets->value(CodeOffsets::UnwindHandler);
+} else {
+_unwind_handler_offset = -1;
+}
+_oops_offset             = data_offset();
+_metadata_offset         = _oops_offset          + align_up(code_buffer->total_oop_size(), oopSize);
+int scopes_data_offset   = _metadata_offset      + align_up(code_buffer->total_metadata_size(), wordSize);
+_scopes_pcs_offset       = scopes_data_offset    + align_up(debug_info->data_size       (), oopSize);
+_dependencies_offset     = _scopes_pcs_offset    + adjust_pcs_size(debug_info->pcs_size());
+_handler_table_offset    = _dependencies_offset  + align_up((int)dependencies->size_in_bytes (), oopSize);
+_nul_chk_table_offset    = _handler_table_offset + align_up(handler_table->size_in_bytes(), oopSize);
+_nmethod_end_offset      = _nul_chk_table_offset + align_up(nul_chk_table->size_in_bytes(), oopSize);
+_entry_point             = code_begin()          + offsets->value(CodeOffsets::Entry);
+_verified_entry_point    = code_begin()          + offsets->value(CodeOffsets::Verified_Entry);
+_osr_entry_point         = code_begin()          + offsets->value(CodeOffsets::OSR_Entry);
+_exception_cache         = NULL;
+_scopes_data_begin = (address) this + scopes_data_offset;
+_pc_desc_container.reset_to(scopes_pcs_begin());
+code_buffer->copy_code_and_locs_to(this);
+// Copy contents of ScopeDescRecorder to nmethod
+code_buffer->copy_values_to(this);
+debug_info->copy_to(this);
+dependencies->copy_to(this);
+if (ScavengeRootsInCode) {
+if (detect_scavenge_root_oops()) {
+CodeCache::add_scavenge_root_nmethod(this);
+}
+Universe::heap()->register_nmethod(this);
+}
+debug_only(verify_scavenge_root_oops());
+CodeCache::commit(this);
+// Copy contents of ExceptionHandlerTable to nmethod
+handler_table->copy_to(this);
+nul_chk_table->copy_to(this);
+// we use the information of entry points to find out if a method is
+// static or non static
+assert(compiler->is_c2() || compiler->is_jvmci() ||
+_method->is_static() == (entry_point() == _verified_entry_point),
+" entry points must be same for static methods and vice versa");
+}
+}
+// Print a short set of xml attributes to identify this nmethod.  The
+// output should be embedded in some other element.
+void nmethod::log_identity(xmlStream* log) const {
+log->print(" compile_id='%d'", compile_id());
+const char* nm_kind = compile_kind();
+if (nm_kind != NULL)  log->print(" compile_kind='%s'", nm_kind);
+log->print(" compiler='%s'", compiler_name());
+if (TieredCompilation) {
+log->print(" level='%d'", comp_level());
+}
+}
+#define LOG_OFFSET(log, name)                    \
+if (p2i(name##_end()) - p2i(name##_begin())) \
+log->print(" " XSTR(name) "_offset='" INTX_FORMAT "'"    , \
+p2i(name##_begin()) - p2i(this))
+void nmethod::log_new_nmethod() const {
+if (LogCompilation && xtty != NULL) {
+ttyLocker ttyl;
+HandleMark hm;
+xtty->begin_elem("nmethod");
+log_identity(xtty);
+xtty->print(" entry='" INTPTR_FORMAT "' size='%d'", p2i(code_begin()), size());
+xtty->print(" address='" INTPTR_FORMAT "'", p2i(this));
+LOG_OFFSET(xtty, relocation);
+LOG_OFFSET(xtty, consts);
+LOG_OFFSET(xtty, insts);
+LOG_OFFSET(xtty, stub);
+LOG_OFFSET(xtty, scopes_data);
+LOG_OFFSET(xtty, scopes_pcs);
+LOG_OFFSET(xtty, dependencies);
+LOG_OFFSET(xtty, handler_table);
+LOG_OFFSET(xtty, nul_chk_table);
+LOG_OFFSET(xtty, oops);
+LOG_OFFSET(xtty, metadata);
+xtty->method(method());
+xtty->stamp();
+xtty->end_elem();
+}
+}
+#undef LOG_OFFSET
+// Print out more verbose output usually for a newly created nmethod.
+void nmethod::print_on(outputStream* st, const char* msg) const {
+if (st != NULL) {
+ttyLocker ttyl;
+if (WizardMode) {
+CompileTask::print(st, this, msg, /*short_form:*/ true);
+st->print_cr(" (" INTPTR_FORMAT ")", p2i(this));
+} else {
+CompileTask::print(st, this, msg, /*short_form:*/ false);
+}
+}
+}
+void nmethod::maybe_print_nmethod(DirectiveSet* directive) {
+bool printnmethods = directive->PrintAssemblyOption || directive->PrintNMethodsOption;
+if (printnmethods || PrintDebugInfo || PrintRelocations || PrintDependencies || PrintExceptionHandlers) {
+print_nmethod(printnmethods);
+}
+}
+void nmethod::print_nmethod(bool printmethod) {
+ttyLocker ttyl;  // keep the following output all in one block
+if (xtty != NULL) {
+xtty->begin_head("print_nmethod");
+xtty->stamp();
+xtty->end_head();
+}
+// print the header part first
+print();
+// then print the requested information
+if (printmethod) {
+print_code();
+print_pcs();
+if (oop_maps()) {
+oop_maps()->print();
+}
+}
+if (printmethod || PrintDebugInfo || CompilerOracle::has_option_string(_method, "PrintDebugInfo")) {
+print_scopes();
+}
+if (printmethod || PrintRelocations || CompilerOracle::has_option_string(_method, "PrintRelocations")) {
+print_relocations();
+}
+if (printmethod || PrintDependencies || CompilerOracle::has_option_string(_method, "PrintDependencies")) {
+print_dependencies();
+}
+if (printmethod || PrintExceptionHandlers) {
+print_handler_table();
+print_nul_chk_table();
+}
+if (printmethod) {
+print_recorded_oops();
+print_recorded_metadata();
+}
+if (xtty != NULL) {
+xtty->tail("print_nmethod");
+}
+}
+// Promote one word from an assembly-time handle to a live embedded oop.
+inline void nmethod::initialize_immediate_oop(oop* dest, jobject handle) {
+if (handle == NULL ||
+// As a special case, IC oops are initialized to 1 or -1.
+handle == (jobject) Universe::non_oop_word()) {
+(*dest) = (oop) handle;
+} else {
+(*dest) = JNIHandles::resolve_non_null(handle);
+}
+}
+// Have to have the same name because it's called by a template
+void nmethod::copy_values(GrowableArray<jobject>* array) {
+int length = array->length();
+assert((address)(oops_begin() + length) <= (address)oops_end(), "oops big enough");
+oop* dest = oops_begin();
+for (int index = 0 ; index < length; index++) {
+initialize_immediate_oop(&dest[index], array->at(index));
+}
+// Now we can fix up all the oops in the code.  We need to do this
+// in the code because the assembler uses jobjects as placeholders.
+// The code and relocations have already been initialized by the
+// CodeBlob constructor, so it is valid even at this early point to
+// iterate over relocations and patch the code.
+fix_oop_relocations(NULL, NULL, /*initialize_immediates=*/ true);
+}
+void nmethod::copy_values(GrowableArray<Metadata*>* array) {
+int length = array->length();
+assert((address)(metadata_begin() + length) <= (address)metadata_end(), "big enough");
+Metadata** dest = metadata_begin();
+for (int index = 0 ; index < length; index++) {
+dest[index] = array->at(index);
+}
+}
+void nmethod::fix_oop_relocations(address begin, address end, bool initialize_immediates) {
+// re-patch all oop-bearing instructions, just in case some oops moved
+RelocIterator iter(this, begin, end);
+while (iter.next()) {
+if (iter.type() == relocInfo::oop_type) {
+oop_Relocation* reloc = iter.oop_reloc();
+if (initialize_immediates && reloc->oop_is_immediate()) {
+oop* dest = reloc->oop_addr();
+initialize_immediate_oop(dest, (jobject) *dest);
+}
+// Refresh the oop-related bits of this instruction.
+reloc->fix_oop_relocation();
+} else if (iter.type() == relocInfo::metadata_type) {
+metadata_Relocation* reloc = iter.metadata_reloc();
+reloc->fix_metadata_relocation();
+}
+}
+}
+void nmethod::verify_clean_inline_caches() {
+assert_locked_or_safepoint(CompiledIC_lock);
+// If the method is not entrant or zombie then a JMP is plastered over the
+// first few bytes.  If an oop in the old code was there, that oop
+// should not get GC'd.  Skip the first few bytes of oops on
+// not-entrant methods.
+address low_boundary = verified_entry_point();
+if (!is_in_use()) {
+low_boundary += NativeJump::instruction_size;
+// %%% Note:  On SPARC we patch only a 4-byte trap, not a full NativeJump.
+// This means that the low_boundary is going to be a little too high.
+// This shouldn't matter, since oops of non-entrant methods are never used.
+// In fact, why are we bothering to look at oops in a non-entrant method??
+}
+ResourceMark rm;
+RelocIterator iter(this, low_boundary);
+while(iter.next()) {
+switch(iter.type()) {
+case relocInfo::virtual_call_type:
+case relocInfo::opt_virtual_call_type: {
+CompiledIC *ic = CompiledIC_at(&iter);
+// Ok, to lookup references to zombies here
+CodeBlob *cb = CodeCache::find_blob_unsafe(ic->ic_destination());
+nmethod* nm = cb->as_nmethod_or_null();
+if( nm != NULL ) {
+// Verify that inline caches pointing to both zombie and not_entrant methods are clean
+if (!nm->is_in_use() || (nm->method()->code() != nm)) {
+assert(ic->is_clean(), "IC should be clean");
+}
+}
+break;
+}
+case relocInfo::static_call_type: {
+CompiledStaticCall *csc = compiledStaticCall_at(iter.reloc());
+CodeBlob *cb = CodeCache::find_blob_unsafe(csc->destination());
+nmethod* nm = cb->as_nmethod_or_null();
+if( nm != NULL ) {
+// Verify that inline caches pointing to both zombie and not_entrant methods are clean
+if (!nm->is_in_use() || (nm->method()->code() != nm)) {
+assert(csc->is_clean(), "IC should be clean");
+}
+}
+break;
+}
+default:
+break;
+}
+}
+}
+// This is a private interface with the sweeper.
+void nmethod::mark_as_seen_on_stack() {
+assert(is_alive(), "Must be an alive method");
+// Set the traversal mark to ensure that the sweeper does 2
+// cleaning passes before moving to zombie.
+set_stack_traversal_mark(NMethodSweeper::traversal_count());
+}
+// Tell if a non-entrant method can be converted to a zombie (i.e.,
+// there are no activations on the stack, not in use by the VM,
+// and not in use by the ServiceThread)
+bool nmethod::can_convert_to_zombie() {
+assert(is_not_entrant(), "must be a non-entrant method");
+// Since the nmethod sweeper only does partial sweep the sweeper's traversal
+// count can be greater than the stack traversal count before it hits the
+// nmethod for the second time.
+return stack_traversal_mark()+1 < NMethodSweeper::traversal_count() &&
+!is_locked_by_vm();
+}
+void nmethod::inc_decompile_count() {
+if (!is_compiled_by_c2() && !is_compiled_by_jvmci()) return;
+// Could be gated by ProfileTraps, but do not bother...
+Method* m = method();
+if (m == NULL)  return;
+MethodData* mdo = m->method_data();
+if (mdo == NULL)  return;
+// There is a benign race here.  See comments in methodData.hpp.
+mdo->inc_decompile_count();
+}
+void nmethod::make_unloaded(BoolObjectClosure* is_alive, oop cause) {
+post_compiled_method_unload();
+// Since this nmethod is being unloaded, make sure that dependencies
+// recorded in instanceKlasses get flushed and pass non-NULL closure to
+// indicate that this work is being done during a GC.
+assert(Universe::heap()->is_gc_active(), "should only be called during gc");
+assert(is_alive != NULL, "Should be non-NULL");
+// A non-NULL is_alive closure indicates that this is being called during GC.
+flush_dependencies(is_alive);
+// Break cycle between nmethod & method
+LogTarget(Trace, class, unload) lt;
+if (lt.is_enabled()) {
+LogStream ls(lt);
+ls.print_cr("making nmethod " INTPTR_FORMAT
+" unloadable, Method*(" INTPTR_FORMAT
+"), cause(" INTPTR_FORMAT ")",
+p2i(this), p2i(_method), p2i(cause));
+if (!Universe::heap()->is_gc_active())
+cause->klass()->print_on(&ls);
+}
+// Unlink the osr method, so we do not look this up again
+if (is_osr_method()) {
+// Invalidate the osr nmethod only once
+if (is_in_use()) {
+invalidate_osr_method();
+}
+#ifdef ASSERT
+if (method() != NULL) {
+// Make sure osr nmethod is invalidated, i.e. not on the list
+bool found = method()->method_holder()->remove_osr_nmethod(this);
+assert(!found, "osr nmethod should have been invalidated");
+}
+#endif
+}
+// If _method is already NULL the Method* is about to be unloaded,
+// so we don't have to break the cycle. Note that it is possible to
+// have the Method* live here, in case we unload the nmethod because
+// it is pointing to some oop (other than the Method*) being unloaded.
+if (_method != NULL) {
+// OSR methods point to the Method*, but the Method* does not
+// point back!
+if (_method->code() == this) {
+_method->clear_code(); // Break a cycle
+}
+_method = NULL;            // Clear the method of this dead nmethod
+}
+// Make the class unloaded - i.e., change state and notify sweeper
+assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
+if (is_in_use()) {
+// Transitioning directly from live to unloaded -- so
+// we need to force a cache clean-up; remember this
+// for later on.
+CodeCache::set_needs_cache_clean(true);
+}
+// Unregister must be done before the state change
+Universe::heap()->unregister_nmethod(this);
+_state = unloaded;
+// Log the unloading.
+log_state_change();
+#if INCLUDE_JVMCI
+// The method can only be unloaded after the pointer to the installed code
+// Java wrapper is no longer alive. Here we need to clear out this weak
+// reference to the dead object. Nulling out the reference has to happen
+// after the method is unregistered since the original value may be still
+// tracked by the rset.
+maybe_invalidate_installed_code();
+// Clear these out after the nmethod has been unregistered and any
+// updates to the InstalledCode instance have been performed.
+_jvmci_installed_code = NULL;
+_speculation_log = NULL;
+#endif
+// The Method* is gone at this point
+assert(_method == NULL, "Tautology");
+set_osr_link(NULL);
+NMethodSweeper::report_state_change(this);
+}
+void nmethod::invalidate_osr_method() {
+assert(_entry_bci != InvocationEntryBci, "wrong kind of nmethod");
+// Remove from list of active nmethods
+if (method() != NULL) {
+method()->method_holder()->remove_osr_nmethod(this);
+}
+}
+void nmethod::log_state_change() const {
+if (LogCompilation) {
+if (xtty != NULL) {
+ttyLocker ttyl;  // keep the following output all in one block
+if (_state == unloaded) {
+xtty->begin_elem("make_unloaded thread='" UINTX_FORMAT "'",
+os::current_thread_id());
+} else {
+xtty->begin_elem("make_not_entrant thread='" UINTX_FORMAT "'%s",
+os::current_thread_id(),
+(_state == zombie ? " zombie='1'" : ""));
+}
+log_identity(xtty);
+xtty->stamp();
+xtty->end_elem();
+}
+}
+const char *state_msg = _state == zombie ? "made zombie" : "made not entrant";
+CompileTask::print_ul(this, state_msg);
+if (PrintCompilation && _state != unloaded) {
+print_on(tty, state_msg);
+}
+}
+/**
+* Common functionality for both make_not_entrant and make_zombie
+*/
+bool nmethod::make_not_entrant_or_zombie(unsigned int state) {
+assert(state == zombie || state == not_entrant, "must be zombie or not_entrant");
+assert(!is_zombie(), "should not already be a zombie");
+if (_state == state) {
+// Avoid taking the lock if already in required state.
+// This is safe from races because the state is an end-state,
+// which the nmethod cannot back out of once entered.
+// No need for fencing either.
+return false;
+}
+// Make sure neither the nmethod nor the method is flushed in case of a safepoint in code below.
+nmethodLocker nml(this);
+methodHandle the_method(method());
+NoSafepointVerifier nsv;
+// during patching, depending on the nmethod state we must notify the GC that
+// code has been unloaded, unregistering it. We cannot do this right while
+// holding the Patching_lock because we need to use the CodeCache_lock. This
+// would be prone to deadlocks.
+// This flag is used to remember whether we need to later lock and unregister.
+bool nmethod_needs_unregister = false;
+{
+// invalidate osr nmethod before acquiring the patching lock since
+// they both acquire leaf locks and we don't want a deadlock.
+// This logic is equivalent to the logic below for patching the
+// verified entry point of regular methods. We check that the
+// nmethod is in use to ensure that it is invalidated only once.
+if (is_osr_method() && is_in_use()) {
+// this effectively makes the osr nmethod not entrant
+invalidate_osr_method();
+}
+// Enter critical section.  Does not block for safepoint.
+MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag);
+if (_state == state) {
+// another thread already performed this transition so nothing
+// to do, but return false to indicate this.
+return false;
+}
+// The caller can be calling the method statically or through an inline
+// cache call.
+if (!is_osr_method() && !is_not_entrant()) {
+NativeJump::patch_verified_entry(entry_point(), verified_entry_point(),
+SharedRuntime::get_handle_wrong_method_stub());
+}
+if (is_in_use() && update_recompile_counts()) {
+// It's a true state change, so mark the method as decompiled.
+// Do it only for transition from alive.
+inc_decompile_count();
+}
+// If the state is becoming a zombie, signal to unregister the nmethod with
+// the heap.
+// This nmethod may have already been unloaded during a full GC.
+if ((state == zombie) && !is_unloaded()) {
+nmethod_needs_unregister = true;
+}
+// Must happen before state change. Otherwise we have a race condition in
+// nmethod::can_not_entrant_be_converted(). I.e., a method can immediately
+// transition its state from 'not_entrant' to 'zombie' without having to wait
+// for stack scanning.
+if (state == not_entrant) {
+mark_as_seen_on_stack();
+OrderAccess::storestore(); // _stack_traversal_mark and _state
+}
+// Change state
+_state = state;
+// Log the transition once
+log_state_change();
+// Invalidate while holding the patching lock
+JVMCI_ONLY(maybe_invalidate_installed_code());
+// Remove nmethod from method.
+// We need to check if both the _code and _from_compiled_code_entry_point
+// refer to this nmethod because there is a race in setting these two fields
+// in Method* as seen in bugid 4947125.
+// If the vep() points to the zombie nmethod, the memory for the nmethod
+// could be flushed and the compiler and vtable stubs could still call
+// through it.
+if (method() != NULL && (method()->code() == this ||
+method()->from_compiled_entry() == verified_entry_point())) {
+HandleMark hm;
+method()->clear_code(false /* already owns Patching_lock */);
+}
+} // leave critical region under Patching_lock
+#ifdef ASSERT
+if (is_osr_method() && method() != NULL) {
+// Make sure osr nmethod is invalidated, i.e. not on the list
+bool found = method()->method_holder()->remove_osr_nmethod(this);
+assert(!found, "osr nmethod should have been invalidated");
+}
+#endif
+// When the nmethod becomes zombie it is no longer alive so the
+// dependencies must be flushed.  nmethods in the not_entrant
+// state will be flushed later when the transition to zombie
+// happens or they get unloaded.
+if (state == zombie) {
+{
+// Flushing dependencies must be done before any possible
+// safepoint can sneak in, otherwise the oops used by the
+// dependency logic could have become stale.
+MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
+if (nmethod_needs_unregister) {
+Universe::heap()->unregister_nmethod(this);
+#ifdef JVMCI
+_jvmci_installed_code = NULL;
+_speculation_log = NULL;
+#endif
+}
+flush_dependencies(NULL);
+}
+// zombie only - if a JVMTI agent has enabled the CompiledMethodUnload
+// event and it hasn't already been reported for this nmethod then
+// report it now. The event may have been reported earlier if the GC
+// marked it for unloading). JvmtiDeferredEventQueue support means
+// we no longer go to a safepoint here.
+post_compiled_method_unload();
+#ifdef ASSERT
+// It's no longer safe to access the oops section since zombie
+// nmethods aren't scanned for GC.
+_oops_are_stale = true;
+#endif
+// the Method may be reclaimed by class unloading now that the
+// nmethod is in zombie state
+set_method(NULL);
+} else {
+assert(state == not_entrant, "other cases may need to be handled differently");
+}
+if (TraceCreateZombies) {
+ResourceMark m;
+tty->print_cr("nmethod <" INTPTR_FORMAT "> %s code made %s", p2i(this), this->method() ? this->method()->name_and_sig_as_C_string() : "null", (state == not_entrant) ? "not entrant" : "zombie");
+}
+NMethodSweeper::report_state_change(this);
+return true;
+}
+void nmethod::flush() {
+// Note that there are no valid oops in the nmethod anymore.
+assert(!is_osr_method() || is_unloaded() || is_zombie(),
+"osr nmethod must be unloaded or zombie before flushing");
+assert(is_zombie() || is_osr_method(), "must be a zombie method");
+assert (!is_locked_by_vm(), "locked methods shouldn't be flushed");
+assert_locked_or_safepoint(CodeCache_lock);
+// completely deallocate this method
+Events::log(JavaThread::current(), "flushing nmethod " INTPTR_FORMAT, p2i(this));
+if (PrintMethodFlushing) {
+tty->print_cr("*flushing %s nmethod %3d/" INTPTR_FORMAT ". Live blobs:" UINT32_FORMAT
+"/Free CodeCache:" SIZE_FORMAT "Kb",
+is_osr_method() ? "osr" : "",_compile_id, p2i(this), CodeCache::blob_count(),
+CodeCache::unallocated_capacity(CodeCache::get_code_blob_type(this))/1024);
+}
+// We need to deallocate any ExceptionCache data.
+// Note that we do not need to grab the nmethod lock for this, it
+// better be thread safe if we're disposing of it!
+ExceptionCache* ec = exception_cache();
+set_exception_cache(NULL);
+while(ec != NULL) {
+ExceptionCache* next = ec->next();
+delete ec;
+ec = next;
+}
+if (on_scavenge_root_list()) {
+CodeCache::drop_scavenge_root_nmethod(this);
+}
+#ifdef SHARK
+((SharkCompiler *) compiler())->free_compiled_method(insts_begin());
+#endif // SHARK
+CodeBlob::flush();
+CodeCache::free(this);
+}
+//
+// Notify all classes this nmethod is dependent on that it is no
+// longer dependent. This should only be called in two situations.
+// First, when a nmethod transitions to a zombie all dependents need
+// to be clear.  Since zombification happens at a safepoint there's no
+// synchronization issues.  The second place is a little more tricky.
+// During phase 1 of mark sweep class unloading may happen and as a
+// result some nmethods may get unloaded.  In this case the flushing
+// of dependencies must happen during phase 1 since after GC any
+// dependencies in the unloaded nmethod won't be updated, so
+// traversing the dependency information in unsafe.  In that case this
+// function is called with a non-NULL argument and this function only
+// notifies instanceKlasses that are reachable
+void nmethod::flush_dependencies(BoolObjectClosure* is_alive) {
+assert_locked_or_safepoint(CodeCache_lock);
+assert(Universe::heap()->is_gc_active() == (is_alive != NULL),
+"is_alive is non-NULL if and only if we are called during GC");
+if (!has_flushed_dependencies()) {
+set_has_flushed_dependencies();
+for (Dependencies::DepStream deps(this); deps.next(); ) {
+if (deps.type() == Dependencies::call_site_target_value) {
+// CallSite dependencies are managed on per-CallSite instance basis.
+oop call_site = deps.argument_oop(0);
+MethodHandles::remove_dependent_nmethod(call_site, this);
+} else {
+Klass* klass = deps.context_type();
+if (klass == NULL) {
+continue;  // ignore things like evol_method
+}
+// During GC the is_alive closure is non-NULL, and is used to
+// determine liveness of dependees that need to be updated.
+if (is_alive == NULL || klass->is_loader_alive(is_alive)) {
+// The GC defers deletion of this entry, since there might be multiple threads
+// iterating over the _dependencies graph. Other call paths are single-threaded
+// and may delete it immediately.
+bool delete_immediately = is_alive == NULL;
+InstanceKlass::cast(klass)->remove_dependent_nmethod(this, delete_immediately);
+}
+}
+}
+}
+}
+// If this oop is not live, the nmethod can be unloaded.
+bool nmethod::can_unload(BoolObjectClosure* is_alive, oop* root, bool unloading_occurred) {
+assert(root != NULL, "just checking");
+oop obj = *root;
+if (obj == NULL || is_alive->do_object_b(obj)) {
+return false;
+}
+// If ScavengeRootsInCode is true, an nmethod might be unloaded
+// simply because one of its constant oops has gone dead.
+// No actual classes need to be unloaded in order for this to occur.
+assert(unloading_occurred || ScavengeRootsInCode, "Inconsistency in unloading");
+make_unloaded(is_alive, obj);
+return true;
+}
+// ------------------------------------------------------------------
+// post_compiled_method_load_event
+// new method for install_code() path
+// Transfer information from compilation to jvmti
+void nmethod::post_compiled_method_load_event() {
+Method* moop = method();
+HOTSPOT_COMPILED_METHOD_LOAD(
+(char *) moop->klass_name()->bytes(),
+moop->klass_name()->utf8_length(),
+(char *) moop->name()->bytes(),
+moop->name()->utf8_length(),
+(char *) moop->signature()->bytes(),
+moop->signature()->utf8_length(),
+insts_begin(), insts_size());
+if (JvmtiExport::should_post_compiled_method_load() ||
+JvmtiExport::should_post_compiled_method_unload()) {
+get_and_cache_jmethod_id();
+}
+if (JvmtiExport::should_post_compiled_method_load()) {
+// Let the Service thread (which is a real Java thread) post the event
+MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag);
+JvmtiDeferredEventQueue::enqueue(
+JvmtiDeferredEvent::compiled_method_load_event(this));
+}
+}
+jmethodID nmethod::get_and_cache_jmethod_id() {
+if (_jmethod_id == NULL) {
+// Cache the jmethod_id since it can no longer be looked up once the
+// method itself has been marked for unloading.
+_jmethod_id = method()->jmethod_id();
+}
+return _jmethod_id;
+}
+void nmethod::post_compiled_method_unload() {
+if (unload_reported()) {
+// During unloading we transition to unloaded and then to zombie
+// and the unloading is reported during the first transition.
+return;
+}
+assert(_method != NULL && !is_unloaded(), "just checking");
+DTRACE_METHOD_UNLOAD_PROBE(method());
+// If a JVMTI agent has enabled the CompiledMethodUnload event then
+// post the event. Sometime later this nmethod will be made a zombie
+// by the sweeper but the Method* will not be valid at that point.
+// If the _jmethod_id is null then no load event was ever requested
+// so don't bother posting the unload.  The main reason for this is
+// that the jmethodID is a weak reference to the Method* so if
+// it's being unloaded there's no way to look it up since the weak
+// ref will have been cleared.
+if (_jmethod_id != NULL && JvmtiExport::should_post_compiled_method_unload()) {
+assert(!unload_reported(), "already unloaded");
+JvmtiDeferredEvent event =
+JvmtiDeferredEvent::compiled_method_unload_event(this,
+_jmethod_id, insts_begin());
+MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag);
+JvmtiDeferredEventQueue::enqueue(event);
+}
+// The JVMTI CompiledMethodUnload event can be enabled or disabled at
+// any time. As the nmethod is being unloaded now we mark it has
+// having the unload event reported - this will ensure that we don't
+// attempt to report the event in the unlikely scenario where the
+// event is enabled at the time the nmethod is made a zombie.
+set_unload_reported();
+}
+bool nmethod::unload_if_dead_at(RelocIterator* iter_at_oop, BoolObjectClosure *is_alive, bool unloading_occurred) {
+assert(iter_at_oop->type() == relocInfo::oop_type, "Wrong relocation type");
+oop_Relocation* r = iter_at_oop->oop_reloc();
+// Traverse those oops directly embedded in the code.
+// Other oops (oop_index>0) are seen as part of scopes_oops.
+assert(1 == (r->oop_is_immediate()) +
+(r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()),
+"oop must be found in exactly one place");
+if (r->oop_is_immediate() && r->oop_value() != NULL) {
+// Unload this nmethod if the oop is dead.
+if (can_unload(is_alive, r->oop_addr(), unloading_occurred)) {
+return true;;
+}
+}
+return false;
+}
+bool nmethod::do_unloading_scopes(BoolObjectClosure* is_alive, bool unloading_occurred) {
+// Scopes
+for (oop* p = oops_begin(); p < oops_end(); p++) {
+if (*p == Universe::non_oop_word())  continue;  // skip non-oops
+if (can_unload(is_alive, p, unloading_occurred)) {
+return true;
+}
+}
+return false;
+}
+bool nmethod::do_unloading_oops(address low_boundary, BoolObjectClosure* is_alive, bool unloading_occurred) {
+// Compiled code
+{
+RelocIterator iter(this, low_boundary);
+while (iter.next()) {
+if (iter.type() == relocInfo::oop_type) {
+if (unload_if_dead_at(&iter, is_alive, unloading_occurred)) {
+return true;
+}
+}
+}
+}
+return do_unloading_scopes(is_alive, unloading_occurred);
+}
+#if INCLUDE_JVMCI
+bool nmethod::do_unloading_jvmci(BoolObjectClosure* is_alive, bool unloading_occurred) {
+bool is_unloaded = false;
+// Follow JVMCI method
+BarrierSet* bs = Universe::heap()->barrier_set();
+if (_jvmci_installed_code != NULL) {
+if (_jvmci_installed_code->is_a(HotSpotNmethod::klass()) && HotSpotNmethod::isDefault(_jvmci_installed_code)) {
+if (!is_alive->do_object_b(_jvmci_installed_code)) {
+clear_jvmci_installed_code();
+}
+} else {
+if (can_unload(is_alive, (oop*)&_jvmci_installed_code, unloading_occurred)) {
+return true;
+}
+}
+}
+if (_speculation_log != NULL) {
+if (!is_alive->do_object_b(_speculation_log)) {
+bs->write_ref_nmethod_pre(&_speculation_log, this);
+_speculation_log = NULL;
+bs->write_ref_nmethod_post(&_speculation_log, this);
+}
+}
+return is_unloaded;
+}
+#endif
+// Iterate over metadata calling this function.   Used by RedefineClasses
+void nmethod::metadata_do(void f(Metadata*)) {
+address low_boundary = verified_entry_point();
+if (is_not_entrant()) {
+low_boundary += NativeJump::instruction_size;
+// %%% Note:  On SPARC we patch only a 4-byte trap, not a full NativeJump.
+// (See comment above.)
+}
+{
+// Visit all immediate references that are embedded in the instruction stream.
+RelocIterator iter(this, low_boundary);
+while (iter.next()) {
+if (iter.type() == relocInfo::metadata_type ) {
+metadata_Relocation* r = iter.metadata_reloc();
+// In this metadata, we must only follow those metadatas directly embedded in
+// the code.  Other metadatas (oop_index>0) are seen as part of
+// the metadata section below.
+assert(1 == (r->metadata_is_immediate()) +
+(r->metadata_addr() >= metadata_begin() && r->metadata_addr() < metadata_end()),
+"metadata must be found in exactly one place");
+if (r->metadata_is_immediate() && r->metadata_value() != NULL) {
+Metadata* md = r->metadata_value();
+if (md != _method) f(md);
+}
+} else if (iter.type() == relocInfo::virtual_call_type) {
+// Check compiledIC holders associated with this nmethod
+CompiledIC *ic = CompiledIC_at(&iter);
+if (ic->is_icholder_call()) {
+CompiledICHolder* cichk = ic->cached_icholder();
+f(cichk->holder_method());
+f(cichk->holder_klass());
+} else {
+Metadata* ic_oop = ic->cached_metadata();
+if (ic_oop != NULL) {
+f(ic_oop);
+}
+}
+}
+}
+}
+// Visit the metadata section
+for (Metadata** p = metadata_begin(); p < metadata_end(); p++) {
+if (*p == Universe::non_oop_word() || *p == NULL)  continue;  // skip non-oops
+Metadata* md = *p;
+f(md);
+}
+// Visit metadata not embedded in the other places.
+if (_method != NULL) f(_method);
+}
+void nmethod::oops_do(OopClosure* f, bool allow_zombie) {
+// make sure the oops ready to receive visitors
+assert(allow_zombie || !is_zombie(), "should not call follow on zombie nmethod");
+assert(!is_unloaded(), "should not call follow on unloaded nmethod");
+// If the method is not entrant or zombie then a JMP is plastered over the
+// first few bytes.  If an oop in the old code was there, that oop
+// should not get GC'd.  Skip the first few bytes of oops on
+// not-entrant methods.
+address low_boundary = verified_entry_point();
+if (is_not_entrant()) {
+low_boundary += NativeJump::instruction_size;
+// %%% Note:  On SPARC we patch only a 4-byte trap, not a full NativeJump.
+// (See comment above.)
+}
+#if INCLUDE_JVMCI
+if (_jvmci_installed_code != NULL) {
+f->do_oop((oop*) &_jvmci_installed_code);
+}
+if (_speculation_log != NULL) {
+f->do_oop((oop*) &_speculation_log);
+}
+#endif
+RelocIterator iter(this, low_boundary);
+while (iter.next()) {
+if (iter.type() == relocInfo::oop_type ) {
+oop_Relocation* r = iter.oop_reloc();
+// In this loop, we must only follow those oops directly embedded in
+// the code.  Other oops (oop_index>0) are seen as part of scopes_oops.
+assert(1 == (r->oop_is_immediate()) +
+(r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()),
+"oop must be found in exactly one place");
+if (r->oop_is_immediate() && r->oop_value() != NULL) {
+f->do_oop(r->oop_addr());
+}
+}
+}
+// Scopes
+// This includes oop constants not inlined in the code stream.
+for (oop* p = oops_begin(); p < oops_end(); p++) {
+if (*p == Universe::non_oop_word())  continue;  // skip non-oops
+f->do_oop(p);
+}
+}
+#define NMETHOD_SENTINEL ((nmethod*)badAddress)
+nmethod* volatile nmethod::_oops_do_mark_nmethods;
+// An nmethod is "marked" if its _mark_link is set non-null.
+// Even if it is the end of the linked list, it will have a non-null link value,
+// as long as it is on the list.
+// This code must be MP safe, because it is used from parallel GC passes.
+bool nmethod::test_set_oops_do_mark() {
+assert(nmethod::oops_do_marking_is_active(), "oops_do_marking_prologue must be called");
+nmethod* observed_mark_link = _oops_do_mark_link;
+if (observed_mark_link == NULL) {
+// Claim this nmethod for this thread to mark.
+observed_mark_link = (nmethod*)
+Atomic::cmpxchg_ptr(NMETHOD_SENTINEL, &_oops_do_mark_link, NULL);
+if (observed_mark_link == NULL) {
+// Atomically append this nmethod (now claimed) to the head of the list:
+nmethod* observed_mark_nmethods = _oops_do_mark_nmethods;
+for (;;) {
+nmethod* required_mark_nmethods = observed_mark_nmethods;
+_oops_do_mark_link = required_mark_nmethods;
+observed_mark_nmethods = (nmethod*)
+Atomic::cmpxchg_ptr(this, &_oops_do_mark_nmethods, required_mark_nmethods);
+if (observed_mark_nmethods == required_mark_nmethods)
+break;
+}
+// Mark was clear when we first saw this guy.
+if (TraceScavenge) { print_on(tty, "oops_do, mark"); }
+return false;
+}
+}
+// On fall through, another racing thread marked this nmethod before we did.
+return true;
+}
+void nmethod::oops_do_marking_prologue() {
+if (TraceScavenge) { tty->print_cr("[oops_do_marking_prologue"); }
+assert(_oops_do_mark_nmethods == NULL, "must not call oops_do_marking_prologue twice in a row");
+// We use cmpxchg_ptr instead of regular assignment here because the user
+// may fork a bunch of threads, and we need them all to see the same state.
+void* observed = Atomic::cmpxchg_ptr(NMETHOD_SENTINEL, &_oops_do_mark_nmethods, NULL);
+guarantee(observed == NULL, "no races in this sequential code");
+}
+void nmethod::oops_do_marking_epilogue() {
+assert(_oops_do_mark_nmethods != NULL, "must not call oops_do_marking_epilogue twice in a row");
+nmethod* cur = _oops_do_mark_nmethods;
+while (cur != NMETHOD_SENTINEL) {
+assert(cur != NULL, "not NULL-terminated");
+nmethod* next = cur->_oops_do_mark_link;
+cur->_oops_do_mark_link = NULL;
+DEBUG_ONLY(cur->verify_oop_relocations());
+NOT_PRODUCT(if (TraceScavenge)  cur->print_on(tty, "oops_do, unmark"));
+cur = next;
+}
+void* required = _oops_do_mark_nmethods;
+void* observed = Atomic::cmpxchg_ptr(NULL, &_oops_do_mark_nmethods, required);
+guarantee(observed == required, "no races in this sequential code");
+if (TraceScavenge) { tty->print_cr("oops_do_marking_epilogue]"); }
+}
+class DetectScavengeRoot: public OopClosure {
+bool     _detected_scavenge_root;
+public:
+DetectScavengeRoot() : _detected_scavenge_root(false)
+{ NOT_PRODUCT(_print_nm = NULL); }
+bool detected_scavenge_root() { return _detected_scavenge_root; }
+virtual void do_oop(oop* p) {
+if ((*p) != NULL && (*p)->is_scavengable()) {
+NOT_PRODUCT(maybe_print(p));
+_detected_scavenge_root = true;
+}
+}
+virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); }
+#ifndef PRODUCT
+nmethod* _print_nm;
+void maybe_print(oop* p) {
+if (_print_nm == NULL)  return;
+if (!_detected_scavenge_root)  _print_nm->print_on(tty, "new scavenge root");
+tty->print_cr("" PTR_FORMAT "[offset=%d] detected scavengable oop " PTR_FORMAT " (found at " PTR_FORMAT ")",
+p2i(_print_nm), (int)((intptr_t)p - (intptr_t)_print_nm),
+p2i(*p), p2i(p));
+(*p)->print();
+}
+#endif //PRODUCT
+};
+bool nmethod::detect_scavenge_root_oops() {
+DetectScavengeRoot detect_scavenge_root;
+NOT_PRODUCT(if (TraceScavenge)  detect_scavenge_root._print_nm = this);
+oops_do(&detect_scavenge_root);
+return detect_scavenge_root.detected_scavenge_root();
+}
+inline bool includes(void* p, void* from, void* to) {
+return from <= p && p < to;
+}
+void nmethod::copy_scopes_pcs(PcDesc* pcs, int count) {
+assert(count >= 2, "must be sentinel values, at least");
+#ifdef ASSERT
+// must be sorted and unique; we do a binary search in find_pc_desc()
+int prev_offset = pcs[0].pc_offset();
+assert(prev_offset == PcDesc::lower_offset_limit,
+"must start with a sentinel");
+for (int i = 1; i < count; i++) {
+int this_offset = pcs[i].pc_offset();
+assert(this_offset > prev_offset, "offsets must be sorted");
+prev_offset = this_offset;
+}
+assert(prev_offset == PcDesc::upper_offset_limit,
+"must end with a sentinel");
+#endif //ASSERT
+// Search for MethodHandle invokes and tag the nmethod.
+for (int i = 0; i < count; i++) {
+if (pcs[i].is_method_handle_invoke()) {
+set_has_method_handle_invokes(true);
+break;
+}
+}
+assert(has_method_handle_invokes() == (_deopt_mh_handler_begin != NULL), "must have deopt mh handler");
+int size = count * sizeof(PcDesc);
+assert(scopes_pcs_size() >= size, "oob");
+memcpy(scopes_pcs_begin(), pcs, size);
+// Adjust the final sentinel downward.
+PcDesc* last_pc = &scopes_pcs_begin()[count-1];
+assert(last_pc->pc_offset() == PcDesc::upper_offset_limit, "sanity");
+last_pc->set_pc_offset(content_size() + 1);
+for (; last_pc + 1 < scopes_pcs_end(); last_pc += 1) {
+// Fill any rounding gaps with copies of the last record.
+last_pc[1] = last_pc[0];
+}
+// The following assert could fail if sizeof(PcDesc) is not
+// an integral multiple of oopSize (the rounding term).
+// If it fails, change the logic to always allocate a multiple
+// of sizeof(PcDesc), and fill unused words with copies of *last_pc.
+assert(last_pc + 1 == scopes_pcs_end(), "must match exactly");
+}
+void nmethod::copy_scopes_data(u_char* buffer, int size) {
+assert(scopes_data_size() >= size, "oob");
+memcpy(scopes_data_begin(), buffer, size);
+}
+#ifdef ASSERT
+static PcDesc* linear_search(const PcDescSearch& search, int pc_offset, bool approximate) {
+PcDesc* lower = search.scopes_pcs_begin();
+PcDesc* upper = search.scopes_pcs_end();
+lower += 1; // exclude initial sentinel
+PcDesc* res = NULL;
+for (PcDesc* p = lower; p < upper; p++) {
+NOT_PRODUCT(--pc_nmethod_stats.pc_desc_tests);  // don't count this call to match_desc
+if (match_desc(p, pc_offset, approximate)) {
+if (res == NULL)
+res = p;
+else
+res = (PcDesc*) badAddress;
+}
+}
+return res;
+}
+#endif
+// Finds a PcDesc with real-pc equal to "pc"
+PcDesc* PcDescContainer::find_pc_desc_internal(address pc, bool approximate, const PcDescSearch& search) {
+address base_address = search.code_begin();
+if ((pc < base_address) ||
+(pc - base_address) >= (ptrdiff_t) PcDesc::upper_offset_limit) {
+return NULL;  // PC is wildly out of range
+}
+int pc_offset = (int) (pc - base_address);
+// Check the PcDesc cache if it contains the desired PcDesc
+// (This as an almost 100% hit rate.)
+PcDesc* res = _pc_desc_cache.find_pc_desc(pc_offset, approximate);
+if (res != NULL) {
+assert(res == linear_search(search, pc_offset, approximate), "cache ok");
+return res;
+}
+// Fallback algorithm: quasi-linear search for the PcDesc
+// Find the last pc_offset less than the given offset.
+// The successor must be the required match, if there is a match at all.
+// (Use a fixed radix to avoid expensive affine pointer arithmetic.)
+PcDesc* lower = search.scopes_pcs_begin();
+PcDesc* upper = search.scopes_pcs_end();
+upper -= 1; // exclude final sentinel
+if (lower >= upper)  return NULL;  // native method; no PcDescs at all
+#define assert_LU_OK \
+/* invariant on lower..upper during the following search: */ \
+assert(lower->pc_offset() <  pc_offset, "sanity"); \
+assert(upper->pc_offset() >= pc_offset, "sanity")
+assert_LU_OK;
+// Use the last successful return as a split point.
+PcDesc* mid = _pc_desc_cache.last_pc_desc();
+NOT_PRODUCT(++pc_nmethod_stats.pc_desc_searches);
+if (mid->pc_offset() < pc_offset) {
+lower = mid;
+} else {
+upper = mid;
+}
+// Take giant steps at first (4096, then 256, then 16, then 1)
+const int LOG2_RADIX = 4 /*smaller steps in debug mode:*/ debug_only(-1);
+const int RADIX = (1 << LOG2_RADIX);
+for (int step = (1 << (LOG2_RADIX*3)); step > 1; step >>= LOG2_RADIX) {
+while ((mid = lower + step) < upper) {
+assert_LU_OK;
+NOT_PRODUCT(++pc_nmethod_stats.pc_desc_searches);
+if (mid->pc_offset() < pc_offset) {
+lower = mid;
+} else {
+upper = mid;
+break;
+}
+}
+assert_LU_OK;
+}
+// Sneak up on the value with a linear search of length ~16.
+while (true) {
+assert_LU_OK;
+mid = lower + 1;
+NOT_PRODUCT(++pc_nmethod_stats.pc_desc_searches);
+if (mid->pc_offset() < pc_offset) {
+lower = mid;
+} else {
+upper = mid;
+break;
+}
+}
+#undef assert_LU_OK
+if (match_desc(upper, pc_offset, approximate)) {
+assert(upper == linear_search(search, pc_offset, approximate), "search ok");
+_pc_desc_cache.add_pc_desc(upper);
+return upper;
+} else {
+assert(NULL == linear_search(search, pc_offset, approximate), "search ok");
+return NULL;
+}
+}
+void nmethod::check_all_dependencies(DepChange& changes) {
+// Checked dependencies are allocated into this ResourceMark
+ResourceMark rm;
+// Turn off dependency tracing while actually testing dependencies.
+NOT_PRODUCT( FlagSetting fs(TraceDependencies, false) );
+typedef ResourceHashtable<DependencySignature, int, &DependencySignature::hash,
+&DependencySignature::equals, 11027> DepTable;
+DepTable* table = new DepTable();
+// Iterate over live nmethods and check dependencies of all nmethods that are not
+// marked for deoptimization. A particular dependency is only checked once.
+NMethodIterator iter;
+while(iter.next()) {
+nmethod* nm = iter.method();
+// Only notify for live nmethods
+if (nm->is_alive() && !nm->is_marked_for_deoptimization()) {
+for (Dependencies::DepStream deps(nm); deps.next(); ) {
+// Construct abstraction of a dependency.
+DependencySignature* current_sig = new DependencySignature(deps);
+// Determine if dependency is already checked. table->put(...) returns
+// 'true' if the dependency is added (i.e., was not in the hashtable).
+if (table->put(*current_sig, 1)) {
+if (deps.check_dependency() != NULL) {
+// Dependency checking failed. Print out information about the failed
+// dependency and finally fail with an assert. We can fail here, since
+// dependency checking is never done in a product build.
+tty->print_cr("Failed dependency:");
+changes.print();
+nm->print();
+nm->print_dependencies();
+assert(false, "Should have been marked for deoptimization");
+}
+}
+}
+}
+}
+}
+bool nmethod::check_dependency_on(DepChange& changes) {
+// What has happened:
+// 1) a new class dependee has been added
+// 2) dependee and all its super classes have been marked
+bool found_check = false;  // set true if we are upset
+for (Dependencies::DepStream deps(this); deps.next(); ) {
+// Evaluate only relevant dependencies.
+if (deps.spot_check_dependency_at(changes) != NULL) {
+found_check = true;
+NOT_DEBUG(break);
+}
+}
+return found_check;
+}
+bool nmethod::is_evol_dependent_on(Klass* dependee) {
+InstanceKlass *dependee_ik = InstanceKlass::cast(dependee);
+Array<Method*>* dependee_methods = dependee_ik->methods();
+for (Dependencies::DepStream deps(this); deps.next(); ) {
+if (deps.type() == Dependencies::evol_method) {
+Method* method = deps.method_argument(0);
+for (int j = 0; j < dependee_methods->length(); j++) {
+if (dependee_methods->at(j) == method) {
+if (log_is_enabled(Debug, redefine, class, nmethod)) {
+ResourceMark rm;
+log_debug(redefine, class, nmethod)
+("Found evol dependency of nmethod %s.%s(%s) compile_id=%d on method %s.%s(%s)",
+_method->method_holder()->external_name(),
+_method->name()->as_C_string(),
+_method->signature()->as_C_string(),
+compile_id(),
+method->method_holder()->external_name(),
+method->name()->as_C_string(),
+method->signature()->as_C_string());
+}
+if (TraceDependencies || LogCompilation)
+deps.log_dependency(dependee);
+return true;
+}
+}
+}
+}
+return false;
+}
+// Called from mark_for_deoptimization, when dependee is invalidated.
+bool nmethod::is_dependent_on_method(Method* dependee) {
+for (Dependencies::DepStream deps(this); deps.next(); ) {
+if (deps.type() != Dependencies::evol_method)
+continue;
+Method* method = deps.method_argument(0);
+if (method == dependee) return true;
+}
+return false;
+}
+bool nmethod::is_patchable_at(address instr_addr) {
+assert(insts_contains(instr_addr), "wrong nmethod used");
+if (is_zombie()) {
+// a zombie may never be patched
+return false;
+}
+return true;
+}
+address nmethod::continuation_for_implicit_exception(address pc) {
+// Exception happened outside inline-cache check code => we are inside
+// an active nmethod => use cpc to determine a return address
+int exception_offset = pc - code_begin();
+int cont_offset = ImplicitExceptionTable(this).at( exception_offset );
+#ifdef ASSERT
+if (cont_offset == 0) {
+Thread* thread = Thread::current();
+ResetNoHandleMark rnm; // Might be called from LEAF/QUICK ENTRY
+HandleMark hm(thread);
+ResourceMark rm(thread);
+CodeBlob* cb = CodeCache::find_blob(pc);
+assert(cb != NULL && cb == this, "");
+ttyLocker ttyl;
+tty->print_cr("implicit exception happened at " INTPTR_FORMAT, p2i(pc));
+print();
+method()->print_codes();
+print_code();
+print_pcs();
+}
+#endif
+if (cont_offset == 0) {
+// Let the normal error handling report the exception
+return NULL;
+}
+return code_begin() + cont_offset;
+}
+void nmethod_init() {
+// make sure you didn't forget to adjust the filler fields
+assert(sizeof(nmethod) % oopSize == 0, "nmethod size must be multiple of a word");
+}
+//-------------------------------------------------------------------------------------------
+// QQQ might we make this work from a frame??
+nmethodLocker::nmethodLocker(address pc) {
+CodeBlob* cb = CodeCache::find_blob(pc);
+guarantee(cb != NULL && cb->is_compiled(), "bad pc for a nmethod found");
+_nm = cb->as_compiled_method();
+lock_nmethod(_nm);
+}
+// Only JvmtiDeferredEvent::compiled_method_unload_event()
+// should pass zombie_ok == true.
+void nmethodLocker::lock_nmethod(CompiledMethod* cm, bool zombie_ok) {
+if (cm == NULL)  return;
+if (cm->is_aot()) return;  // FIXME: Revisit once _lock_count is added to aot_method
+nmethod* nm = cm->as_nmethod();
+Atomic::inc(&nm->_lock_count);
+assert(zombie_ok || !nm->is_zombie(), "cannot lock a zombie method");
+}
+void nmethodLocker::unlock_nmethod(CompiledMethod* cm) {
+if (cm == NULL)  return;
+if (cm->is_aot()) return;  // FIXME: Revisit once _lock_count is added to aot_method
+nmethod* nm = cm->as_nmethod();
+Atomic::dec(&nm->_lock_count);
+assert(nm->_lock_count >= 0, "unmatched nmethod lock/unlock");
+}
+// -----------------------------------------------------------------------------
+// Verification
+class VerifyOopsClosure: public OopClosure {
+nmethod* _nm;
+bool     _ok;
+public:
+VerifyOopsClosure(nmethod* nm) : _nm(nm), _ok(true) { }
+bool ok() { return _ok; }
+virtual void do_oop(oop* p) {
+if (oopDesc::is_oop_or_null(*p)) return;
+if (_ok) {
+_nm->print_nmethod(true);
+_ok = false;
+}
+tty->print_cr("*** non-oop " PTR_FORMAT " found at " PTR_FORMAT " (offset %d)",
+p2i(*p), p2i(p), (int)((intptr_t)p - (intptr_t)_nm));
+}
+virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); }
+};
+void nmethod::verify() {
+// Hmm. OSR methods can be deopted but not marked as zombie or not_entrant
+// seems odd.
+if (is_zombie() || is_not_entrant() || is_unloaded())
+return;
+// Make sure all the entry points are correctly aligned for patching.
+NativeJump::check_verified_entry_alignment(entry_point(), verified_entry_point());
+// assert(oopDesc::is_oop(method()), "must be valid");
+ResourceMark rm;
+if (!CodeCache::contains(this)) {
+fatal("nmethod at " INTPTR_FORMAT " not in zone", p2i(this));
+}
+if(is_native_method() )
+return;
+nmethod* nm = CodeCache::find_nmethod(verified_entry_point());
+if (nm != this) {
+fatal("findNMethod did not find this nmethod (" INTPTR_FORMAT ")", p2i(this));
+}
+for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) {
+if (! p->verify(this)) {
+tty->print_cr("\t\tin nmethod at " INTPTR_FORMAT " (pcs)", p2i(this));
+}
+}
+VerifyOopsClosure voc(this);
+oops_do(&voc);
+assert(voc.ok(), "embedded oops must be OK");
+verify_scavenge_root_oops();
+verify_scopes();
+}
+void nmethod::verify_interrupt_point(address call_site) {
+// Verify IC only when nmethod installation is finished.
+bool is_installed = (method()->code() == this) // nmethod is in state 'in_use' and installed
+|| !this->is_in_use();     // nmethod is installed, but not in 'in_use' state
+if (is_installed) {
+Thread *cur = Thread::current();
+if (CompiledIC_lock->owner() == cur ||
+((cur->is_VM_thread() || cur->is_ConcurrentGC_thread()) &&
+SafepointSynchronize::is_at_safepoint())) {
+CompiledIC_at(this, call_site);
+CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
+} else {
+MutexLocker ml_verify (CompiledIC_lock);
+CompiledIC_at(this, call_site);
+}
+}
+PcDesc* pd = pc_desc_at(nativeCall_at(call_site)->return_address());
+assert(pd != NULL, "PcDesc must exist");
+for (ScopeDesc* sd = new ScopeDesc(this, pd->scope_decode_offset(),
+pd->obj_decode_offset(), pd->should_reexecute(), pd->rethrow_exception(),
+pd->return_oop());
+!sd->is_top(); sd = sd->sender()) {
+sd->verify();
+}
+}
+void nmethod::verify_scopes() {
+if( !method() ) return;       // Runtime stubs have no scope
+if (method()->is_native()) return; // Ignore stub methods.
+// iterate through all interrupt point
+// and verify the debug information is valid.
+RelocIterator iter((nmethod*)this);
+while (iter.next()) {
+address stub = NULL;
+switch (iter.type()) {
+case relocInfo::virtual_call_type:
+verify_interrupt_point(iter.addr());
+break;
+case relocInfo::opt_virtual_call_type:
+stub = iter.opt_virtual_call_reloc()->static_stub(false);
+verify_interrupt_point(iter.addr());
+break;
+case relocInfo::static_call_type:
+stub = iter.static_call_reloc()->static_stub(false);
+//verify_interrupt_point(iter.addr());
+break;
+case relocInfo::runtime_call_type:
+case relocInfo::runtime_call_w_cp_type: {
+address destination = iter.reloc()->value();
+// Right now there is no way to find out which entries support
+// an interrupt point.  It would be nice if we had this
+// information in a table.
+break;
+}
+default:
+break;
+}
+assert(stub == NULL || stub_contains(stub), "static call stub outside stub section");
+}
+}
+// -----------------------------------------------------------------------------
+// Non-product code
+#ifndef PRODUCT
+class DebugScavengeRoot: public OopClosure {
+nmethod* _nm;
+bool     _ok;
+public:
+DebugScavengeRoot(nmethod* nm) : _nm(nm), _ok(true) { }
+bool ok() { return _ok; }
+virtual void do_oop(oop* p) {
+if ((*p) == NULL || !(*p)->is_scavengable())  return;
+if (_ok) {
+_nm->print_nmethod(true);
+_ok = false;
+}
+tty->print_cr("*** scavengable oop " PTR_FORMAT " found at " PTR_FORMAT " (offset %d)",
+p2i(*p), p2i(p), (int)((intptr_t)p - (intptr_t)_nm));
+(*p)->print();
+}
+virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); }
+};
+void nmethod::verify_scavenge_root_oops() {
+if (UseG1GC) {
+return;
+}
+if (!on_scavenge_root_list()) {
+// Actually look inside, to verify the claim that it's clean.
+DebugScavengeRoot debug_scavenge_root(this);
+oops_do(&debug_scavenge_root);
+if (!debug_scavenge_root.ok())
+fatal("found an unadvertised bad scavengable oop in the code cache");
+}
+assert(scavenge_root_not_marked(), "");
+}
+#endif // PRODUCT
+// Printing operations
+void nmethod::print() const {
+ResourceMark rm;
+ttyLocker ttyl;   // keep the following output all in one block
+tty->print("Compiled method ");
+if (is_compiled_by_c1()) {
+tty->print("(c1) ");
+} else if (is_compiled_by_c2()) {
+tty->print("(c2) ");
+} else if (is_compiled_by_shark()) {
+tty->print("(shark) ");
+} else if (is_compiled_by_jvmci()) {
+tty->print("(JVMCI) ");
+} else {
+tty->print("(nm) ");
+}
+print_on(tty, NULL);
+if (WizardMode) {
+tty->print("((nmethod*) " INTPTR_FORMAT ") ", p2i(this));
+tty->print(" for method " INTPTR_FORMAT , p2i(method()));
+tty->print(" { ");
+tty->print_cr("%s ", state());
+if (on_scavenge_root_list())  tty->print("scavenge_root ");
+tty->print_cr("}:");
+}
+if (size              () > 0) tty->print_cr(" total in heap  [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d",
+p2i(this),
+p2i(this) + size(),
+size());
+if (relocation_size   () > 0) tty->print_cr(" relocation     [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d",
+p2i(relocation_begin()),
+p2i(relocation_end()),
+relocation_size());
+if (consts_size       () > 0) tty->print_cr(" constants      [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d",
+p2i(consts_begin()),
+p2i(consts_end()),
+consts_size());
+if (insts_size        () > 0) tty->print_cr(" main code      [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d",
+p2i(insts_begin()),
+p2i(insts_end()),
+insts_size());
+if (stub_size         () > 0) tty->print_cr(" stub code      [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d",
+p2i(stub_begin()),
+p2i(stub_end()),
+stub_size());
+if (oops_size         () > 0) tty->print_cr(" oops           [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d",
+p2i(oops_begin()),
+p2i(oops_end()),
+oops_size());
+if (metadata_size      () > 0) tty->print_cr(" metadata       [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d",
+p2i(metadata_begin()),
+p2i(metadata_end()),
+metadata_size());
+if (scopes_data_size  () > 0) tty->print_cr(" scopes data    [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d",
+p2i(scopes_data_begin()),
+p2i(scopes_data_end()),
+scopes_data_size());
+if (scopes_pcs_size   () > 0) tty->print_cr(" scopes pcs     [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d",
+p2i(scopes_pcs_begin()),
+p2i(scopes_pcs_end()),
+scopes_pcs_size());
+if (dependencies_size () > 0) tty->print_cr(" dependencies   [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d",
+p2i(dependencies_begin()),
+p2i(dependencies_end()),
+dependencies_size());
+if (handler_table_size() > 0) tty->print_cr(" handler table  [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d",
+p2i(handler_table_begin()),
+p2i(handler_table_end()),
+handler_table_size());
+if (nul_chk_table_size() > 0) tty->print_cr(" nul chk table  [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d",
+p2i(nul_chk_table_begin()),
+p2i(nul_chk_table_end()),
+nul_chk_table_size());
+}
+#ifndef PRODUCT
+void nmethod::print_scopes() {
+// Find the first pc desc for all scopes in the code and print it.
+ResourceMark rm;
+for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) {
+if (p->scope_decode_offset() == DebugInformationRecorder::serialized_null)
+continue;
+ScopeDesc* sd = scope_desc_at(p->real_pc(this));
+while (sd != NULL) {
+sd->print_on(tty, p);
+sd = sd->sender();
+}
+}
+}
+void nmethod::print_dependencies() {
+ResourceMark rm;
+ttyLocker ttyl;   // keep the following output all in one block
+tty->print_cr("Dependencies:");
+for (Dependencies::DepStream deps(this); deps.next(); ) {
+deps.print_dependency();
+Klass* ctxk = deps.context_type();
+if (ctxk != NULL) {
+if (ctxk->is_instance_klass() && InstanceKlass::cast(ctxk)->is_dependent_nmethod(this)) {
+tty->print_cr("   [nmethod<=klass]%s", ctxk->external_name());
+}
+}
+deps.log_dependency();  // put it into the xml log also
+}
+}
+void nmethod::print_relocations() {
+ResourceMark m;       // in case methods get printed via the debugger
+tty->print_cr("relocations:");
+RelocIterator iter(this);
+iter.print();
+}
+void nmethod::print_pcs() {
+ResourceMark m;       // in case methods get printed via debugger
+tty->print_cr("pc-bytecode offsets:");
+for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) {
+p->print(this);
+}
+}
+void nmethod::print_recorded_oops() {
+tty->print_cr("Recorded oops:");
+for (int i = 0; i < oops_count(); i++) {
+oop o = oop_at(i);
+tty->print("#%3d: " INTPTR_FORMAT " ", i, p2i(o));
+if (o == (oop)Universe::non_oop_word()) {
+tty->print("non-oop word");
+} else {
+o->print_value();
+}
+tty->cr();
+}
+}
+void nmethod::print_recorded_metadata() {
+tty->print_cr("Recorded metadata:");
+for (int i = 0; i < metadata_count(); i++) {
+Metadata* m = metadata_at(i);
+tty->print("#%3d: " INTPTR_FORMAT " ", i, p2i(m));
+if (m == (Metadata*)Universe::non_oop_word()) {
+tty->print("non-metadata word");
+} else {
+m->print_value_on_maybe_null(tty);
+}
+tty->cr();
+}
+}
+#endif // PRODUCT
+const char* nmethod::reloc_string_for(u_char* begin, u_char* end) {
+RelocIterator iter(this, begin, end);
+bool have_one = false;
+while (iter.next()) {
+have_one = true;
+switch (iter.type()) {
+case relocInfo::none:                  return "no_reloc";
+case relocInfo::oop_type: {
+stringStream st;
+oop_Relocation* r = iter.oop_reloc();
+oop obj = r->oop_value();
+st.print("oop(");
+if (obj == NULL) st.print("NULL");
+else obj->print_value_on(&st);
+st.print(")");
+return st.as_string();
+}
+case relocInfo::metadata_type: {
+stringStream st;
+metadata_Relocation* r = iter.metadata_reloc();
+Metadata* obj = r->metadata_value();
+st.print("metadata(");
+if (obj == NULL) st.print("NULL");
+else obj->print_value_on(&st);
+st.print(")");
+return st.as_string();
+}
+case relocInfo::runtime_call_type:
+case relocInfo::runtime_call_w_cp_type: {
+stringStream st;
+st.print("runtime_call");
+CallRelocation* r = (CallRelocation*)iter.reloc();
+address dest = r->destination();
+CodeBlob* cb = CodeCache::find_blob(dest);
+if (cb != NULL) {
+st.print(" %s", cb->name());
+} else {
+ResourceMark rm;
+const int buflen = 1024;
+char* buf = NEW_RESOURCE_ARRAY(char, buflen);
+int offset;
+if (os::dll_address_to_function_name(dest, buf, buflen, &offset)) {
+st.print(" %s", buf);
+if (offset != 0) {
+st.print("+%d", offset);
+}
+}
+}
+return st.as_string();
+}
+case relocInfo::virtual_call_type: {
+stringStream st;
+st.print_raw("virtual_call");
+virtual_call_Relocation* r = iter.virtual_call_reloc();
+Method* m = r->method_value();
+if (m != NULL) {
+assert(m->is_method(), "");
+m->print_short_name(&st);
+}
+return st.as_string();
+}
+case relocInfo::opt_virtual_call_type: {
+stringStream st;
+st.print_raw("optimized virtual_call");
+opt_virtual_call_Relocation* r = iter.opt_virtual_call_reloc();
+Method* m = r->method_value();
+if (m != NULL) {
+assert(m->is_method(), "");
+m->print_short_name(&st);
+}
+return st.as_string();
+}
+case relocInfo::static_call_type: {
+stringStream st;
+st.print_raw("static_call");
+static_call_Relocation* r = iter.static_call_reloc();
+Method* m = r->method_value();
+if (m != NULL) {
+assert(m->is_method(), "");
+m->print_short_name(&st);
+}
+return st.as_string();
+}
+case relocInfo::static_stub_type:      return "static_stub";
+case relocInfo::external_word_type:    return "external_word";
+case relocInfo::internal_word_type:    return "internal_word";
+case relocInfo::section_word_type:     return "section_word";
+case relocInfo::poll_type:             return "poll";
+case relocInfo::poll_return_type:      return "poll_return";
+case relocInfo::type_mask:             return "type_bit_mask";
+default:
+break;
+}
+}
+return have_one ? "other" : NULL;
+}
+// Return a the last scope in (begin..end]
+ScopeDesc* nmethod::scope_desc_in(address begin, address end) {
+PcDesc* p = pc_desc_near(begin+1);
+if (p != NULL && p->real_pc(this) <= end) {
+return new ScopeDesc(this, p->scope_decode_offset(),
+p->obj_decode_offset(), p->should_reexecute(), p->rethrow_exception(),
+p->return_oop());
+}
+return NULL;
+}
+void nmethod::print_nmethod_labels(outputStream* stream, address block_begin) const {
+if (block_begin == entry_point())             stream->print_cr("[Entry Point]");
+if (block_begin == verified_entry_point())    stream->print_cr("[Verified Entry Point]");
+if (JVMCI_ONLY(_exception_offset >= 0 &&) block_begin == exception_begin())         stream->print_cr("[Exception Handler]");
+if (block_begin == stub_begin())              stream->print_cr("[Stub Code]");
+if (JVMCI_ONLY(_deopt_handler_begin != NULL &&) block_begin == deopt_handler_begin())     stream->print_cr("[Deopt Handler Code]");
+if (has_method_handle_invokes())
+if (block_begin == deopt_mh_handler_begin())  stream->print_cr("[Deopt MH Handler Code]");
+if (block_begin == consts_begin())            stream->print_cr("[Constants]");
+if (block_begin == entry_point()) {
+methodHandle m = method();
+if (m.not_null()) {
+stream->print("  # ");
+m->print_value_on(stream);
+stream->cr();
+}
+if (m.not_null() && !is_osr_method()) {
+ResourceMark rm;
+int sizeargs = m->size_of_parameters();
+BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sizeargs);
+VMRegPair* regs   = NEW_RESOURCE_ARRAY(VMRegPair, sizeargs);
+{
+int sig_index = 0;
+if (!m->is_static())
+sig_bt[sig_index++] = T_OBJECT; // 'this'
+for (SignatureStream ss(m->signature()); !ss.at_return_type(); ss.next()) {
+BasicType t = ss.type();
+sig_bt[sig_index++] = t;
+if (type2size[t] == 2) {
+sig_bt[sig_index++] = T_VOID;
+} else {
+assert(type2size[t] == 1, "size is 1 or 2");
+}
+}
+assert(sig_index == sizeargs, "");
+}
+const char* spname = "sp"; // make arch-specific?
+intptr_t out_preserve = SharedRuntime::java_calling_convention(sig_bt, regs, sizeargs, false);
+int stack_slot_offset = this->frame_size() * wordSize;
+int tab1 = 14, tab2 = 24;
+int sig_index = 0;
+int arg_index = (m->is_static() ? 0 : -1);
+bool did_old_sp = false;
+for (SignatureStream ss(m->signature()); !ss.at_return_type(); ) {
+bool at_this = (arg_index == -1);
+bool at_old_sp = false;
+BasicType t = (at_this ? T_OBJECT : ss.type());
+assert(t == sig_bt[sig_index], "sigs in sync");
+if (at_this)
+stream->print("  # this: ");
+else
+stream->print("  # parm%d: ", arg_index);
+stream->move_to(tab1);
+VMReg fst = regs[sig_index].first();
+VMReg snd = regs[sig_index].second();
+if (fst->is_reg()) {
+stream->print("%s", fst->name());
+if (snd->is_valid())  {
+stream->print(":%s", snd->name());
+}
+} else if (fst->is_stack()) {
+int offset = fst->reg2stack() * VMRegImpl::stack_slot_size + stack_slot_offset;
+if (offset == stack_slot_offset)  at_old_sp = true;
+stream->print("[%s+0x%x]", spname, offset);
+} else {
+stream->print("reg%d:%d??", (int)(intptr_t)fst, (int)(intptr_t)snd);
+}
+stream->print(" ");
+stream->move_to(tab2);
+stream->print("= ");
+if (at_this) {
+m->method_holder()->print_value_on(stream);
+} else {
+bool did_name = false;
+if (!at_this && ss.is_object()) {
+Symbol* name = ss.as_symbol_or_null();
+if (name != NULL) {
+name->print_value_on(stream);
+did_name = true;
+}
+}
+if (!did_name)
+stream->print("%s", type2name(t));
+}
+if (at_old_sp) {
+stream->print("  (%s of caller)", spname);
+did_old_sp = true;
+}
+stream->cr();
+sig_index += type2size[t];
+arg_index += 1;
+if (!at_this)  ss.next();
+}
+if (!did_old_sp) {
+stream->print("  # ");
+stream->move_to(tab1);
+stream->print("[%s+0x%x]", spname, stack_slot_offset);
+stream->print("  (%s of caller)", spname);
+stream->cr();
+}
+}
+}
+}
+void nmethod::print_code_comment_on(outputStream* st, int column, u_char* begin, u_char* end) {
+// First, find an oopmap in (begin, end].
+// We use the odd half-closed interval so that oop maps and scope descs
+// which are tied to the byte after a call are printed with the call itself.
+address base = code_begin();
+ImmutableOopMapSet* oms = oop_maps();
+if (oms != NULL) {
+for (int i = 0, imax = oms->count(); i < imax; i++) {
+const ImmutableOopMapPair* pair = oms->pair_at(i);
+const ImmutableOopMap* om = pair->get_from(oms);
+address pc = base + pair->pc_offset();
+if (pc > begin) {
+if (pc <= end) {
+st->move_to(column);
+st->print("; ");
+om->print_on(st);
+}
+break;
+}
+}
+}
+// Print any debug info present at this pc.
+ScopeDesc* sd  = scope_desc_in(begin, end);
+if (sd != NULL) {
+st->move_to(column);
+if (sd->bci() == SynchronizationEntryBCI) {
+st->print(";*synchronization entry");
+} else {
+if (sd->method() == NULL) {
+st->print("method is NULL");
+} else if (sd->method()->is_native()) {
+st->print("method is native");
+} else {
+Bytecodes::Code bc = sd->method()->java_code_at(sd->bci());
+st->print(";*%s", Bytecodes::name(bc));
+switch (bc) {
+case Bytecodes::_invokevirtual:
+case Bytecodes::_invokespecial:
+case Bytecodes::_invokestatic:
+case Bytecodes::_invokeinterface:
+{
+Bytecode_invoke invoke(sd->method(), sd->bci());
+st->print(" ");
+if (invoke.name() != NULL)
+invoke.name()->print_symbol_on(st);
+else
+st->print("<UNKNOWN>");
+break;
+}
+case Bytecodes::_getfield:
+case Bytecodes::_putfield:
+case Bytecodes::_getstatic:
+case Bytecodes::_putstatic:
+{
+Bytecode_field field(sd->method(), sd->bci());
+st->print(" ");
+if (field.name() != NULL)
+field.name()->print_symbol_on(st);
+else
+st->print("<UNKNOWN>");
+}
+default:
+break;
+}
+}
+st->print(" {reexecute=%d rethrow=%d return_oop=%d}", sd->should_reexecute(), sd->rethrow_exception(), sd->return_oop());
+}
+// Print all scopes
+for (;sd != NULL; sd = sd->sender()) {
+st->move_to(column);
+st->print("; -");
+if (sd->method() == NULL) {
+st->print("method is NULL");
+} else {
+sd->method()->print_short_name(st);
+}
+int lineno = sd->method()->line_number_from_bci(sd->bci());
+if (lineno != -1) {
+st->print("@%d (line %d)", sd->bci(), lineno);
+} else {
+st->print("@%d", sd->bci());
+}
+st->cr();
+}
+}
+// Print relocation information
+const char* str = reloc_string_for(begin, end);
+if (str != NULL) {
+if (sd != NULL) st->cr();
+st->move_to(column);
+st->print(";   {%s}", str);
+}
+int cont_offset = ImplicitExceptionTable(this).at(begin - code_begin());
+if (cont_offset != 0) {
+st->move_to(column);
+st->print("; implicit exception: dispatches to " INTPTR_FORMAT, p2i(code_begin() + cont_offset));
+}
+}
+class DirectNativeCallWrapper: public NativeCallWrapper {
+private:
+NativeCall* _call;
+public:
+DirectNativeCallWrapper(NativeCall* call) : _call(call) {}
+virtual address destination() const { return _call->destination(); }
+virtual address instruction_address() const { return _call->instruction_address(); }
+virtual address next_instruction_address() const { return _call->next_instruction_address(); }
+virtual address return_address() const { return _call->return_address(); }
+virtual address get_resolve_call_stub(bool is_optimized) const {
+if (is_optimized) {
+return SharedRuntime::get_resolve_opt_virtual_call_stub();
+}
+return SharedRuntime::get_resolve_virtual_call_stub();
+}
+virtual void set_destination_mt_safe(address dest) {
+#if INCLUDE_AOT
+if (UseAOT) {
+CodeBlob* callee = CodeCache::find_blob(dest);
+CompiledMethod* cm = callee->as_compiled_method_or_null();
+if (cm != NULL && cm->is_far_code()) {
+// Temporary fix, see JDK-8143106
+CompiledDirectStaticCall* csc = CompiledDirectStaticCall::at(instruction_address());
+csc->set_to_far(methodHandle(cm->method()), dest);
+return;
+}
+}
+#endif
+_call->set_destination_mt_safe(dest);
+}
+virtual void set_to_interpreted(const methodHandle& method, CompiledICInfo& info) {
+CompiledDirectStaticCall* csc = CompiledDirectStaticCall::at(instruction_address());
+#if INCLUDE_AOT
+if (info.to_aot()) {
+csc->set_to_far(method, info.entry());
+} else
+#endif
+{
+csc->set_to_interpreted(method, info.entry());
+}
+}
+virtual void verify() const {
+// make sure code pattern is actually a call imm32 instruction
+_call->verify();
+if (os::is_MP()) {
+_call->verify_alignment();
+}
+}
+virtual void verify_resolve_call(address dest) const {
+CodeBlob* db = CodeCache::find_blob_unsafe(dest);
+assert(!db->is_adapter_blob(), "must use stub!");
+}
+virtual bool is_call_to_interpreted(address dest) const {
+CodeBlob* cb = CodeCache::find_blob(_call->instruction_address());
+return cb->contains(dest);
+}
+virtual bool is_safe_for_patching() const { return false; }
+virtual NativeInstruction* get_load_instruction(virtual_call_Relocation* r) const {
+return nativeMovConstReg_at(r->cached_value());
+}
+virtual void *get_data(NativeInstruction* instruction) const {
+return (void*)((NativeMovConstReg*) instruction)->data();
+}
+virtual void set_data(NativeInstruction* instruction, intptr_t data) {
+((NativeMovConstReg*) instruction)->set_data(data);
+}
+};
+NativeCallWrapper* nmethod::call_wrapper_at(address call) const {
+return new DirectNativeCallWrapper((NativeCall*) call);
+}
+NativeCallWrapper* nmethod::call_wrapper_before(address return_pc) const {
+return new DirectNativeCallWrapper(nativeCall_before(return_pc));
+}
+address nmethod::call_instruction_address(address pc) const {
+if (NativeCall::is_call_before(pc)) {
+NativeCall *ncall = nativeCall_before(pc);
+return ncall->instruction_address();
+}
+return NULL;
+}
+CompiledStaticCall* nmethod::compiledStaticCall_at(Relocation* call_site) const {
+return CompiledDirectStaticCall::at(call_site);
+}
+CompiledStaticCall* nmethod::compiledStaticCall_at(address call_site) const {
+return CompiledDirectStaticCall::at(call_site);
+}
+CompiledStaticCall* nmethod::compiledStaticCall_before(address return_addr) const {
+return CompiledDirectStaticCall::before(return_addr);
+}
+#ifndef PRODUCT
+void nmethod::print_value_on(outputStream* st) const {
+st->print("nmethod");
+print_on(st, NULL);
+}
+void nmethod::print_calls(outputStream* st) {
+RelocIterator iter(this);
+while (iter.next()) {
+switch (iter.type()) {
+case relocInfo::virtual_call_type:
+case relocInfo::opt_virtual_call_type: {
+VerifyMutexLocker mc(CompiledIC_lock);
+CompiledIC_at(&iter)->print();
+break;
+}
+case relocInfo::static_call_type:
+st->print_cr("Static call at " INTPTR_FORMAT, p2i(iter.reloc()->addr()));
+CompiledDirectStaticCall::at(iter.reloc())->print();
+break;
+default:
+break;
+}
+}
+}
+void nmethod::print_handler_table() {
+ExceptionHandlerTable(this).print();
+}
+void nmethod::print_nul_chk_table() {
+ImplicitExceptionTable(this).print(code_begin());
+}
+void nmethod::print_statistics() {
+ttyLocker ttyl;
+if (xtty != NULL)  xtty->head("statistics type='nmethod'");
+native_nmethod_stats.print_native_nmethod_stats();
+#ifdef COMPILER1
+c1_java_nmethod_stats.print_nmethod_stats("C1");
+#endif
+#ifdef COMPILER2
+c2_java_nmethod_stats.print_nmethod_stats("C2");
+#endif
+#if INCLUDE_JVMCI
+jvmci_java_nmethod_stats.print_nmethod_stats("JVMCI");
+#endif
+#ifdef SHARK
+shark_java_nmethod_stats.print_nmethod_stats("Shark");
+#endif
+unknown_java_nmethod_stats.print_nmethod_stats("Unknown");
+DebugInformationRecorder::print_statistics();
+#ifndef PRODUCT
+pc_nmethod_stats.print_pc_stats();
+#endif
+Dependencies::print_statistics();
+if (xtty != NULL)  xtty->tail("statistics");
+}
+#endif // !PRODUCT
+#if INCLUDE_JVMCI
+void nmethod::clear_jvmci_installed_code() {
+// write_ref_method_pre/post can only be safely called at a
+// safepoint or while holding the CodeCache_lock
+assert(CodeCache_lock->is_locked() ||
+SafepointSynchronize::is_at_safepoint(), "should be performed under a lock for consistency");
+if (_jvmci_installed_code != NULL) {
+// This must be done carefully to maintain nmethod remembered sets properly
+BarrierSet* bs = Universe::heap()->barrier_set();
+bs->write_ref_nmethod_pre(&_jvmci_installed_code, this);
+_jvmci_installed_code = NULL;
+bs->write_ref_nmethod_post(&_jvmci_installed_code, this);
+}
+}
+void nmethod::maybe_invalidate_installed_code() {
+assert(Patching_lock->is_locked() ||
+SafepointSynchronize::is_at_safepoint(), "should be performed under a lock for consistency");
+oop installed_code = jvmci_installed_code();
+if (installed_code != NULL) {
+nmethod* nm = (nmethod*)InstalledCode::address(installed_code);
+if (nm == NULL || nm != this) {
+// The link has been broken or the InstalledCode instance is
+// associated with another nmethod so do nothing.
+return;
+}
+if (!is_alive()) {
+// Break the link between nmethod and InstalledCode such that the nmethod
+// can subsequently be flushed safely.  The link must be maintained while
+// the method could have live activations since invalidateInstalledCode
+// might want to invalidate all existing activations.
+InstalledCode::set_address(installed_code, 0);
+InstalledCode::set_entryPoint(installed_code, 0);
+} else if (is_not_entrant()) {
+// Remove the entry point so any invocation will fail but keep
+// the address link around that so that existing activations can
+// be invalidated.
+InstalledCode::set_entryPoint(installed_code, 0);
+}
+}
+}
+void nmethod::invalidate_installed_code(Handle installedCode, TRAPS) {
+if (installedCode() == NULL) {
+THROW(vmSymbols::java_lang_NullPointerException());
+}
+jlong nativeMethod = InstalledCode::address(installedCode);
+nmethod* nm = (nmethod*)nativeMethod;
+if (nm == NULL) {
+// Nothing to do
+return;
+}
+nmethodLocker nml(nm);
+#ifdef ASSERT
+{
+MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag);
+// This relationship can only be checked safely under a lock
+assert(nm == NULL || !nm->is_alive() || nm->jvmci_installed_code() == installedCode(), "sanity check");
+}
+#endif
+if (nm->is_alive()) {
+// The nmethod state machinery maintains the link between the
+// HotSpotInstalledCode and nmethod* so as long as the nmethod appears to be
+// alive assume there is work to do and deoptimize the nmethod.
+nm->mark_for_deoptimization();
+VM_Deoptimize op;
+VMThread::execute(&op);
+}
+MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag);
+// Check that it's still associated with the same nmethod and break
+// the link if it is.
+if (InstalledCode::address(installedCode) == nativeMethod) {
+InstalledCode::set_address(installedCode, 0);
+}
+}
+char* nmethod::jvmci_installed_code_name(char* buf, size_t buflen) {
+if (!this->is_compiled_by_jvmci()) {
+return NULL;
+}
+oop installedCode = this->jvmci_installed_code();
+if (installedCode != NULL) {
+oop installedCodeName = NULL;
+if (installedCode->is_a(InstalledCode::klass())) {
+installedCodeName = InstalledCode::name(installedCode);
+}
+if (installedCodeName != NULL) {
+return java_lang_String::as_utf8_string(installedCodeName, buf, (int)buflen);
+} else {
+jio_snprintf(buf, buflen, "null");
+return buf;
+}
+}
+jio_snprintf(buf, buflen, "noInstalledCode");
+return buf;
+}
+#endif

changeset 47216	71c04702a3d5
parent 47099	49f5fa3fc2ae
child 47624	b055cb5170f5