--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/os/linux/vm/vmError_linux.cpp	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,112 @@
+/*
+ * Copyright 2003-2006 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+# include "incls/_precompiled.incl"
+# include "incls/_vmError_linux.cpp.incl"
+
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <sys/syscall.h>
+#include <unistd.h>
+#include <signal.h>
+
+void VMError::show_message_box(char *buf, int buflen) {
+  bool yes;
+  do {
+    error_string(buf, buflen);
+    int len = (int)strlen(buf);
+    char *p = &buf[len];
+
+    jio_snprintf(p, buflen - len,
+               "\n\n"
+               "Do you want to debug the problem?\n\n"
+               "To debug, run 'gdb /proc/%d/exe %d'; then switch to thread " INTX_FORMAT "\n"
+               "Enter 'yes' to launch gdb automatically (PATH must include gdb)\n"
+               "Otherwise, press RETURN to abort...",
+               os::current_process_id(), os::current_process_id(),
+               os::current_thread_id());
+
+    yes = os::message_box("Unexpected Error", buf);
+
+    if (yes) {
+      // yes, user asked VM to launch debugger
+      jio_snprintf(buf, buflen, "gdb /proc/%d/exe %d",
+                   os::current_process_id(), os::current_process_id());
+
+      os::fork_and_exec(buf);
+      yes = false;
+    }
+  } while (yes);
+}
+
+// Space for our "saved" signal flags and handlers
+static int resettedSigflags[2];
+static address resettedSighandler[2];
+
+static void save_signal(int idx, int sig)
+{
+  struct sigaction sa;
+  sigaction(sig, NULL, &sa);
+  resettedSigflags[idx]   = sa.sa_flags;
+  resettedSighandler[idx] = (sa.sa_flags & SA_SIGINFO)
+                              ? CAST_FROM_FN_PTR(address, sa.sa_sigaction)
+                              : CAST_FROM_FN_PTR(address, sa.sa_handler);
+}
+
+int VMError::get_resetted_sigflags(int sig) {
+  if(SIGSEGV == sig) {
+    return resettedSigflags[0];
+  } else if(SIGBUS == sig) {
+    return resettedSigflags[1];
+  }
+  return -1;
+}
+
+address VMError::get_resetted_sighandler(int sig) {
+  if(SIGSEGV == sig) {
+    return resettedSighandler[0];
+  } else if(SIGBUS == sig) {
+    return resettedSighandler[1];
+  }
+  return NULL;
+}
+
+static void crash_handler(int sig, siginfo_t* info, void* ucVoid) {
+  // unmask current signal
+  sigset_t newset;
+  sigemptyset(&newset);
+  sigaddset(&newset, sig);
+  sigprocmask(SIG_UNBLOCK, &newset, NULL);
+
+  VMError err(NULL, sig, NULL, info, ucVoid);
+  err.report_and_die();
+}
+
+void VMError::reset_signal_handlers() {
+  // Save sigflags for resetted signals
+  save_signal(0, SIGSEGV);
+  save_signal(1, SIGBUS);
+  os::signal(SIGSEGV, CAST_FROM_FN_PTR(void *, crash_handler));
+  os::signal(SIGBUS, CAST_FROM_FN_PTR(void *, crash_handler));
+}