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The vmError.cpp Java example source code
/*
* Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
#include "precompiled.hpp"
#include "compiler/compileBroker.hpp"
#include "gc_interface/collectedHeap.hpp"
#include "prims/whitebox.hpp"
#include "runtime/arguments.hpp"
#include "runtime/frame.inline.hpp"
#include "runtime/init.hpp"
#include "runtime/os.hpp"
#include "runtime/thread.hpp"
#include "runtime/vmThread.hpp"
#include "runtime/vm_operations.hpp"
#include "services/memTracker.hpp"
#include "utilities/debug.hpp"
#include "utilities/decoder.hpp"
#include "utilities/defaultStream.hpp"
#include "utilities/errorReporter.hpp"
#include "utilities/events.hpp"
#include "utilities/top.hpp"
#include "utilities/vmError.hpp"
// List of environment variables that should be reported in error log file.
const char *env_list[] = {
// All platforms
"JAVA_HOME", "JRE_HOME", "JAVA_TOOL_OPTIONS", "_JAVA_OPTIONS", "CLASSPATH",
"JAVA_COMPILER", "PATH", "USERNAME",
// Env variables that are defined on Solaris/Linux/BSD
"LD_LIBRARY_PATH", "LD_PRELOAD", "SHELL", "DISPLAY",
"HOSTTYPE", "OSTYPE", "ARCH", "MACHTYPE",
// defined on Linux
"LD_ASSUME_KERNEL", "_JAVA_SR_SIGNUM",
// defined on Darwin
"DYLD_LIBRARY_PATH", "DYLD_FALLBACK_LIBRARY_PATH",
"DYLD_FRAMEWORK_PATH", "DYLD_FALLBACK_FRAMEWORK_PATH",
"DYLD_INSERT_LIBRARIES",
// defined on Windows
"OS", "PROCESSOR_IDENTIFIER", "_ALT_JAVA_HOME_DIR",
(const char *)0
};
// Fatal error handler for internal errors and crashes.
//
// The default behavior of fatal error handler is to print a brief message
// to standard out (defaultStream::output_fd()), then save detailed information
// into an error report file (hs_err_pid<pid>.log) and abort VM. If multiple
// threads are having troubles at the same time, only one error is reported.
// The thread that is reporting error will abort VM when it is done, all other
// threads are blocked forever inside report_and_die().
// Constructor for crashes
VMError::VMError(Thread* thread, unsigned int sig, address pc, void* siginfo, void* context) {
_thread = thread;
_id = sig;
_pc = pc;
_siginfo = siginfo;
_context = context;
_verbose = false;
_current_step = 0;
_current_step_info = NULL;
_message = NULL;
_detail_msg = NULL;
_filename = NULL;
_lineno = 0;
_size = 0;
}
// Constructor for internal errors
VMError::VMError(Thread* thread, const char* filename, int lineno,
const char* message, const char * detail_msg)
{
_thread = thread;
_id = INTERNAL_ERROR; // Value that's not an OS exception/signal
_filename = filename;
_lineno = lineno;
_message = message;
_detail_msg = detail_msg;
_verbose = false;
_current_step = 0;
_current_step_info = NULL;
_pc = NULL;
_siginfo = NULL;
_context = NULL;
_size = 0;
}
// Constructor for OOM errors
VMError::VMError(Thread* thread, const char* filename, int lineno, size_t size,
VMErrorType vm_err_type, const char* message) {
_thread = thread;
_id = vm_err_type; // Value that's not an OS exception/signal
_filename = filename;
_lineno = lineno;
_message = message;
_detail_msg = NULL;
_verbose = false;
_current_step = 0;
_current_step_info = NULL;
_pc = NULL;
_siginfo = NULL;
_context = NULL;
_size = size;
}
// Constructor for non-fatal errors
VMError::VMError(const char* message) {
_thread = NULL;
_id = INTERNAL_ERROR; // Value that's not an OS exception/signal
_filename = NULL;
_lineno = 0;
_message = message;
_detail_msg = NULL;
_verbose = false;
_current_step = 0;
_current_step_info = NULL;
_pc = NULL;
_siginfo = NULL;
_context = NULL;
_size = 0;
}
// -XX:OnError=<string>, where can be a list of commands, separated
// by ';'. "%p" is replaced by current process id (pid); "%%" is replaced by
// a single "%". Some examples:
//
// -XX:OnError="pmap %p" // show memory map
// -XX:OnError="gcore %p; dbx - %p" // dump core and launch debugger
// -XX:OnError="cat hs_err_pid%p.log | mail my_email@sun.com"
// -XX:OnError="kill -9 %p" // ?#!@#
// A simple parser for -XX:OnError, usage:
// ptr = OnError;
// while ((cmd = next_OnError_command(buffer, sizeof(buffer), &ptr) != NULL)
// ... ...
static char* next_OnError_command(char* buf, int buflen, const char** ptr) {
if (ptr == NULL || *ptr == NULL) return NULL;
const char* cmd = *ptr;
// skip leading blanks or ';'
while (*cmd == ' ' || *cmd == ';') cmd++;
if (*cmd == '\0') return NULL;
const char * cmdend = cmd;
while (*cmdend != '\0' && *cmdend != ';') cmdend++;
Arguments::copy_expand_pid(cmd, cmdend - cmd, buf, buflen);
*ptr = (*cmdend == '\0' ? cmdend : cmdend + 1);
return buf;
}
static void print_bug_submit_message(outputStream *out, Thread *thread) {
if (out == NULL) return;
out->print_raw_cr("# If you would like to submit a bug report, please visit:");
out->print_raw ("# ");
out->print_raw_cr(Arguments::java_vendor_url_bug());
// If the crash is in native code, encourage user to submit a bug to the
// provider of that code.
if (thread && thread->is_Java_thread() &&
!thread->is_hidden_from_external_view()) {
JavaThread* jt = (JavaThread*)thread;
if (jt->thread_state() == _thread_in_native) {
out->print_cr("# The crash happened outside the Java Virtual Machine in native code.\n# See problematic frame for where to report the bug.");
}
}
out->print_raw_cr("#");
}
bool VMError::coredump_status;
char VMError::coredump_message[O_BUFLEN];
void VMError::report_coredump_status(const char* message, bool status) {
coredump_status = status;
strncpy(coredump_message, message, sizeof(coredump_message));
coredump_message[sizeof(coredump_message)-1] = 0;
}
// Return a string to describe the error
char* VMError::error_string(char* buf, int buflen) {
char signame_buf[64];
const char *signame = os::exception_name(_id, signame_buf, sizeof(signame_buf));
if (signame) {
jio_snprintf(buf, buflen,
"%s (0x%x) at pc=" PTR_FORMAT ", pid=%d, tid=" UINTX_FORMAT,
signame, _id, _pc,
os::current_process_id(), os::current_thread_id());
} else if (_filename != NULL && _lineno > 0) {
// skip directory names
char separator = os::file_separator()[0];
const char *p = strrchr(_filename, separator);
int n = jio_snprintf(buf, buflen,
"Internal Error at %s:%d, pid=%d, tid=" UINTX_FORMAT,
p ? p + 1 : _filename, _lineno,
os::current_process_id(), os::current_thread_id());
if (n >= 0 && n < buflen && _message) {
if (_detail_msg) {
jio_snprintf(buf + n, buflen - n, "%s%s: %s",
os::line_separator(), _message, _detail_msg);
} else {
jio_snprintf(buf + n, buflen - n, "%sError: %s",
os::line_separator(), _message);
}
}
} else {
jio_snprintf(buf, buflen,
"Internal Error (0x%x), pid=%d, tid=" UINTX_FORMAT,
_id, os::current_process_id(), os::current_thread_id());
}
return buf;
}
void VMError::print_stack_trace(outputStream* st, JavaThread* jt,
char* buf, int buflen, bool verbose) {
#ifdef ZERO
if (jt->zero_stack()->sp() && jt->top_zero_frame()) {
// StackFrameStream uses the frame anchor, which may not have
// been set up. This can be done at any time in Zero, however,
// so if it hasn't been set up then we just set it up now and
// clear it again when we're done.
bool has_last_Java_frame = jt->has_last_Java_frame();
if (!has_last_Java_frame)
jt->set_last_Java_frame();
st->print("Java frames:");
// If the top frame is a Shark frame and the frame anchor isn't
// set up then it's possible that the information in the frame
// is garbage: it could be from a previous decache, or it could
// simply have never been written. So we print a warning...
StackFrameStream sfs(jt);
if (!has_last_Java_frame && !sfs.is_done()) {
if (sfs.current()->zeroframe()->is_shark_frame()) {
st->print(" (TOP FRAME MAY BE JUNK)");
}
}
st->cr();
// Print the frames
for(int i = 0; !sfs.is_done(); sfs.next(), i++) {
sfs.current()->zero_print_on_error(i, st, buf, buflen);
st->cr();
}
// Reset the frame anchor if necessary
if (!has_last_Java_frame)
jt->reset_last_Java_frame();
}
#else
if (jt->has_last_Java_frame()) {
st->print_cr("Java frames: (J=compiled Java code, j=interpreted, Vv=VM code)");
for(StackFrameStream sfs(jt); !sfs.is_done(); sfs.next()) {
sfs.current()->print_on_error(st, buf, buflen, verbose);
st->cr();
}
}
#endif // ZERO
}
// This is the main function to report a fatal error. Only one thread can
// call this function, so we don't need to worry about MT-safety. But it's
// possible that the error handler itself may crash or die on an internal
// error, for example, when the stack/heap is badly damaged. We must be
// able to handle recursive errors that happen inside error handler.
//
// Error reporting is done in several steps. If a crash or internal error
// occurred when reporting an error, the nested signal/exception handler
// can skip steps that are already (or partially) done. Error reporting will
// continue from the next step. This allows us to retrieve and print
// information that may be unsafe to get after a fatal error. If it happens,
// you may find nested report_and_die() frames when you look at the stack
// in a debugger.
//
// In general, a hang in error handler is much worse than a crash or internal
// error, as it's harder to recover from a hang. Deadlock can happen if we
// try to grab a lock that is already owned by current thread, or if the
// owner is blocked forever (e.g. in os::infinite_sleep()). If possible, the
// error handler and all the functions it called should avoid grabbing any
// lock. An important thing to notice is that memory allocation needs a lock.
//
// We should avoid using large stack allocated buffers. Many errors happen
// when stack space is already low. Making things even worse is that there
// could be nested report_and_die() calls on stack (see above). Only one
// thread can report error, so large buffers are statically allocated in data
// segment.
void VMError::report(outputStream* st) {
# define BEGIN if (_current_step == 0) { _current_step = 1;
# define STEP(n, s) } if (_current_step < n) { _current_step = n; _current_step_info = s;
# define END }
// don't allocate large buffer on stack
static char buf[O_BUFLEN];
BEGIN
STEP(10, "(printing fatal error message)")
st->print_cr("#");
if (should_report_bug(_id)) {
st->print_cr("# A fatal error has been detected by the Java Runtime Environment:");
} else {
st->print_cr("# There is insufficient memory for the Java "
"Runtime Environment to continue.");
}
STEP(15, "(printing type of error)")
switch(_id) {
case OOM_MALLOC_ERROR:
case OOM_MMAP_ERROR:
if (_size) {
st->print("# Native memory allocation ");
st->print((_id == (int)OOM_MALLOC_ERROR) ? "(malloc) failed to allocate " :
"(mmap) failed to map ");
jio_snprintf(buf, sizeof(buf), SIZE_FORMAT, _size);
st->print(buf);
st->print(" bytes");
if (_message != NULL) {
st->print(" for ");
st->print(_message);
}
st->cr();
} else {
if (_message != NULL)
st->print("# ");
st->print_cr(_message);
}
// In error file give some solutions
if (_verbose) {
st->print_cr("# Possible reasons:");
st->print_cr("# The system is out of physical RAM or swap space");
st->print_cr("# In 32 bit mode, the process size limit was hit");
st->print_cr("# Possible solutions:");
st->print_cr("# Reduce memory load on the system");
st->print_cr("# Increase physical memory or swap space");
st->print_cr("# Check if swap backing store is full");
st->print_cr("# Use 64 bit Java on a 64 bit OS");
st->print_cr("# Decrease Java heap size (-Xmx/-Xms)");
st->print_cr("# Decrease number of Java threads");
st->print_cr("# Decrease Java thread stack sizes (-Xss)");
st->print_cr("# Set larger code cache with -XX:ReservedCodeCacheSize=");
st->print_cr("# This output file may be truncated or incomplete.");
} else {
return; // that's enough for the screen
}
break;
case INTERNAL_ERROR:
default:
break;
}
STEP(20, "(printing exception/signal name)")
st->print_cr("#");
st->print("# ");
// Is it an OS exception/signal?
if (os::exception_name(_id, buf, sizeof(buf))) {
st->print("%s", buf);
st->print(" (0x%x)", _id); // signal number
st->print(" at pc=" PTR_FORMAT, _pc);
} else {
if (should_report_bug(_id)) {
st->print("Internal Error");
} else {
st->print("Out of Memory Error");
}
if (_filename != NULL && _lineno > 0) {
#ifdef PRODUCT
// In product mode chop off pathname?
char separator = os::file_separator()[0];
const char *p = strrchr(_filename, separator);
const char *file = p ? p+1 : _filename;
#else
const char *file = _filename;
#endif
size_t len = strlen(file);
size_t buflen = sizeof(buf);
strncpy(buf, file, buflen);
if (len + 10 < buflen) {
sprintf(buf + len, ":%d", _lineno);
}
st->print(" (%s)", buf);
} else {
st->print(" (0x%x)", _id);
}
}
STEP(30, "(printing current thread and pid)")
// process id, thread id
st->print(", pid=%d", os::current_process_id());
st->print(", tid=" UINTX_FORMAT, os::current_thread_id());
st->cr();
STEP(40, "(printing error message)")
if (should_report_bug(_id)) { // already printed the message.
// error message
if (_detail_msg) {
st->print_cr("# %s: %s", _message ? _message : "Error", _detail_msg);
} else if (_message) {
st->print_cr("# Error: %s", _message);
}
}
STEP(50, "(printing Java version string)")
// VM version
st->print_cr("#");
JDK_Version::current().to_string(buf, sizeof(buf));
const char* runtime_name = JDK_Version::runtime_name() != NULL ?
JDK_Version::runtime_name() : "";
const char* runtime_version = JDK_Version::runtime_version() != NULL ?
JDK_Version::runtime_version() : "";
st->print_cr("# JRE version: %s (%s) (build %s)", runtime_name, buf, runtime_version);
st->print_cr("# Java VM: %s (%s %s %s %s)",
Abstract_VM_Version::vm_name(),
Abstract_VM_Version::vm_release(),
Abstract_VM_Version::vm_info_string(),
Abstract_VM_Version::vm_platform_string(),
UseCompressedOops ? "compressed oops" : ""
);
STEP(60, "(printing problematic frame)")
// Print current frame if we have a context (i.e. it's a crash)
if (_context) {
st->print_cr("# Problematic frame:");
st->print("# ");
frame fr = os::fetch_frame_from_context(_context);
fr.print_on_error(st, buf, sizeof(buf));
st->cr();
st->print_cr("#");
}
STEP(63, "(printing core file information)")
st->print("# ");
if (coredump_status) {
st->print("Core dump written. Default location: %s", coredump_message);
} else {
st->print("Failed to write core dump. %s", coredump_message);
}
st->print_cr("");
st->print_cr("#");
STEP(65, "(printing bug submit message)")
if (should_report_bug(_id) && _verbose) {
print_bug_submit_message(st, _thread);
}
STEP(70, "(printing thread)" )
if (_verbose) {
st->cr();
st->print_cr("--------------- T H R E A D ---------------");
st->cr();
}
STEP(80, "(printing current thread)" )
// current thread
if (_verbose) {
if (_thread) {
st->print("Current thread (" PTR_FORMAT "): ", _thread);
_thread->print_on_error(st, buf, sizeof(buf));
st->cr();
} else {
st->print_cr("Current thread is native thread");
}
st->cr();
}
STEP(90, "(printing siginfo)" )
// signal no, signal code, address that caused the fault
if (_verbose && _siginfo) {
os::print_siginfo(st, _siginfo);
st->cr();
}
STEP(100, "(printing registers, top of stack, instructions near pc)")
// registers, top of stack, instructions near pc
if (_verbose && _context) {
os::print_context(st, _context);
st->cr();
}
STEP(105, "(printing register info)")
// decode register contents if possible
if (_verbose && _context && Universe::is_fully_initialized()) {
os::print_register_info(st, _context);
st->cr();
}
STEP(110, "(printing stack bounds)" )
if (_verbose) {
st->print("Stack: ");
address stack_top;
size_t stack_size;
if (_thread) {
stack_top = _thread->stack_base();
stack_size = _thread->stack_size();
} else {
stack_top = os::current_stack_base();
stack_size = os::current_stack_size();
}
address stack_bottom = stack_top - stack_size;
st->print("[" PTR_FORMAT "," PTR_FORMAT "]", stack_bottom, stack_top);
frame fr = _context ? os::fetch_frame_from_context(_context)
: os::current_frame();
if (fr.sp()) {
st->print(", sp=" PTR_FORMAT, fr.sp());
size_t free_stack_size = pointer_delta(fr.sp(), stack_bottom, 1024);
st->print(", free space=" SIZE_FORMAT "k", free_stack_size);
}
st->cr();
}
STEP(120, "(printing native stack)" )
if (_verbose) {
if (os::platform_print_native_stack(st, _context, buf, sizeof(buf))) {
// We have printed the native stack in platform-specific code
// Windows/x64 needs special handling.
} else {
frame fr = _context ? os::fetch_frame_from_context(_context)
: os::current_frame();
// see if it's a valid frame
if (fr.pc()) {
st->print_cr("Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)");
int count = 0;
while (count++ < StackPrintLimit) {
fr.print_on_error(st, buf, sizeof(buf));
st->cr();
// Compiled code may use EBP register on x86 so it looks like
// non-walkable C frame. Use frame.sender() for java frames.
if (_thread && _thread->is_Java_thread() && fr.is_java_frame()) {
RegisterMap map((JavaThread*)_thread, false); // No update
fr = fr.sender(&map);
continue;
}
if (os::is_first_C_frame(&fr)) break;
fr = os::get_sender_for_C_frame(&fr);
}
if (count > StackPrintLimit) {
st->print_cr("...<more frames>...");
}
st->cr();
}
}
}
STEP(130, "(printing Java stack)" )
if (_verbose && _thread && _thread->is_Java_thread()) {
print_stack_trace(st, (JavaThread*)_thread, buf, sizeof(buf));
}
STEP(135, "(printing target Java thread stack)" )
// printing Java thread stack trace if it is involved in GC crash
if (_verbose && _thread && (_thread->is_Named_thread())) {
JavaThread* jt = ((NamedThread *)_thread)->processed_thread();
if (jt != NULL) {
st->print_cr("JavaThread " PTR_FORMAT " (nid = " UINTX_FORMAT ") was being processed", jt, jt->osthread()->thread_id());
print_stack_trace(st, jt, buf, sizeof(buf), true);
}
}
STEP(140, "(printing VM operation)" )
if (_verbose && _thread && _thread->is_VM_thread()) {
VMThread* t = (VMThread*)_thread;
VM_Operation* op = t->vm_operation();
if (op) {
op->print_on_error(st);
st->cr();
st->cr();
}
}
STEP(150, "(printing current compile task)" )
if (_verbose && _thread && _thread->is_Compiler_thread()) {
CompilerThread* t = (CompilerThread*)_thread;
if (t->task()) {
st->cr();
st->print_cr("Current CompileTask:");
t->task()->print_line_on_error(st, buf, sizeof(buf));
st->cr();
}
}
STEP(160, "(printing process)" )
if (_verbose) {
st->cr();
st->print_cr("--------------- P R O C E S S ---------------");
st->cr();
}
STEP(170, "(printing all threads)" )
// all threads
if (_verbose && _thread) {
Threads::print_on_error(st, _thread, buf, sizeof(buf));
st->cr();
}
STEP(175, "(printing VM state)" )
if (_verbose) {
// Safepoint state
st->print("VM state:");
if (SafepointSynchronize::is_synchronizing()) st->print("synchronizing");
else if (SafepointSynchronize::is_at_safepoint()) st->print("at safepoint");
else st->print("not at safepoint");
// Also see if error occurred during initialization or shutdown
if (!Universe::is_fully_initialized()) {
st->print(" (not fully initialized)");
} else if (VM_Exit::vm_exited()) {
st->print(" (shutting down)");
} else {
st->print(" (normal execution)");
}
st->cr();
st->cr();
}
STEP(180, "(printing owned locks on error)" )
// mutexes/monitors that currently have an owner
if (_verbose) {
print_owned_locks_on_error(st);
st->cr();
}
STEP(190, "(printing heap information)" )
if (_verbose && Universe::is_fully_initialized()) {
Universe::heap()->print_on_error(st);
st->cr();
st->print_cr("Polling page: " INTPTR_FORMAT, os::get_polling_page());
st->cr();
}
STEP(195, "(printing code cache information)" )
if (_verbose && Universe::is_fully_initialized()) {
// print code cache information before vm abort
CodeCache::print_summary(st);
st->cr();
}
STEP(200, "(printing ring buffers)" )
if (_verbose) {
Events::print_all(st);
st->cr();
}
STEP(205, "(printing dynamic libraries)" )
if (_verbose) {
// dynamic libraries, or memory map
os::print_dll_info(st);
st->cr();
}
STEP(210, "(printing VM options)" )
if (_verbose) {
// VM options
Arguments::print_on(st);
st->cr();
}
STEP(215, "(printing warning if internal testing API used)" )
if (WhiteBox::used()) {
st->print_cr("Unsupported internal testing APIs have been used.");
st->cr();
}
STEP(220, "(printing environment variables)" )
if (_verbose) {
os::print_environment_variables(st, env_list, buf, sizeof(buf));
st->cr();
}
STEP(225, "(printing signal handlers)" )
if (_verbose) {
os::print_signal_handlers(st, buf, sizeof(buf));
st->cr();
}
STEP(230, "" )
if (_verbose) {
st->cr();
st->print_cr("--------------- S Y S T E M ---------------");
st->cr();
}
STEP(240, "(printing OS information)" )
if (_verbose) {
os::print_os_info(st);
st->cr();
}
STEP(250, "(printing CPU info)" )
if (_verbose) {
os::print_cpu_info(st);
st->cr();
}
STEP(260, "(printing memory info)" )
if (_verbose) {
os::print_memory_info(st);
st->cr();
}
STEP(270, "(printing internal vm info)" )
if (_verbose) {
st->print_cr("vm_info: %s", Abstract_VM_Version::internal_vm_info_string());
st->cr();
}
STEP(280, "(printing date and time)" )
if (_verbose) {
os::print_date_and_time(st);
st->cr();
}
END
# undef BEGIN
# undef STEP
# undef END
}
VMError* volatile VMError::first_error = NULL;
volatile jlong VMError::first_error_tid = -1;
// An error could happen before tty is initialized or after it has been
// destroyed. Here we use a very simple unbuffered fdStream for printing.
// Only out.print_raw() and out.print_raw_cr() should be used, as other
// printing methods need to allocate large buffer on stack. To format a
// string, use jio_snprintf() with a static buffer or use staticBufferStream.
fdStream VMError::out(defaultStream::output_fd());
fdStream VMError::log; // error log used by VMError::report_and_die()
/** Expand a pattern into a buffer starting at pos and open a file using constructed path */
static int expand_and_open(const char* pattern, char* buf, size_t buflen, size_t pos) {
int fd = -1;
if (Arguments::copy_expand_pid(pattern, strlen(pattern), &buf[pos], buflen - pos)) {
fd = open(buf, O_RDWR | O_CREAT | O_TRUNC, 0666);
}
return fd;
}
/**
* Construct file name for a log file and return it's file descriptor.
* Name and location depends on pattern, default_pattern params and access
* permissions.
*/
static int prepare_log_file(const char* pattern, const char* default_pattern, char* buf, size_t buflen) {
int fd = -1;
// If possible, use specified pattern to construct log file name
if (pattern != NULL) {
fd = expand_and_open(pattern, buf, buflen, 0);
}
// Either user didn't specify, or the user's location failed,
// so use the default name in the current directory
if (fd == -1) {
const char* cwd = os::get_current_directory(buf, buflen);
if (cwd != NULL) {
size_t pos = strlen(cwd);
int fsep_len = jio_snprintf(&buf[pos], buflen-pos, "%s", os::file_separator());
pos += fsep_len;
if (fsep_len > 0) {
fd = expand_and_open(default_pattern, buf, buflen, pos);
}
}
}
// try temp directory if it exists.
if (fd == -1) {
const char* tmpdir = os::get_temp_directory();
if (tmpdir != NULL && strlen(tmpdir) > 0) {
int pos = jio_snprintf(buf, buflen, "%s%s", tmpdir, os::file_separator());
if (pos > 0) {
fd = expand_and_open(default_pattern, buf, buflen, pos);
}
}
}
return fd;
}
void VMError::report_and_die() {
// Don't allocate large buffer on stack
static char buffer[O_BUFLEN];
// How many errors occurred in error handler when reporting first_error.
static int recursive_error_count;
// We will first print a brief message to standard out (verbose = false),
// then save detailed information in log file (verbose = true).
static bool out_done = false; // done printing to standard out
static bool log_done = false; // done saving error log
static bool transmit_report_done = false; // done error reporting
// disble NMT to avoid further exception
MemTracker::shutdown(MemTracker::NMT_error_reporting);
if (SuppressFatalErrorMessage) {
os::abort();
}
jlong mytid = os::current_thread_id();
if (first_error == NULL &&
Atomic::cmpxchg_ptr(this, &first_error, NULL) == NULL) {
// first time
first_error_tid = mytid;
set_error_reported();
if (ShowMessageBoxOnError || PauseAtExit) {
show_message_box(buffer, sizeof(buffer));
// User has asked JVM to abort. Reset ShowMessageBoxOnError so the
// WatcherThread can kill JVM if the error handler hangs.
ShowMessageBoxOnError = false;
}
// Write a minidump on Windows, check core dump limits on Linux/Solaris
os::check_or_create_dump(_siginfo, _context, buffer, sizeof(buffer));
// reset signal handlers or exception filter; make sure recursive crashes
// are handled properly.
reset_signal_handlers();
} else {
// If UseOsErrorReporting we call this for each level of the call stack
// while searching for the exception handler. Only the first level needs
// to be reported.
if (UseOSErrorReporting && log_done) return;
// This is not the first error, see if it happened in a different thread
// or in the same thread during error reporting.
if (first_error_tid != mytid) {
char msgbuf[64];
jio_snprintf(msgbuf, sizeof(msgbuf),
"[thread " INT64_FORMAT " also had an error]",
mytid);
out.print_raw_cr(msgbuf);
// error reporting is not MT-safe, block current thread
os::infinite_sleep();
} else {
if (recursive_error_count++ > 30) {
out.print_raw_cr("[Too many errors, abort]");
os::die();
}
jio_snprintf(buffer, sizeof(buffer),
"[error occurred during error reporting %s, id 0x%x]",
first_error ? first_error->_current_step_info : "",
_id);
if (log.is_open()) {
log.cr();
log.print_raw_cr(buffer);
log.cr();
} else {
out.cr();
out.print_raw_cr(buffer);
out.cr();
}
}
}
// print to screen
if (!out_done) {
first_error->_verbose = false;
staticBufferStream sbs(buffer, sizeof(buffer), &out);
first_error->report(&sbs);
out_done = true;
first_error->_current_step = 0; // reset current_step
first_error->_current_step_info = ""; // reset current_step string
}
// print to error log file
if (!log_done) {
first_error->_verbose = true;
// see if log file is already open
if (!log.is_open()) {
// open log file
int fd = prepare_log_file(ErrorFile, "hs_err_pid%p.log", buffer, sizeof(buffer));
if (fd != -1) {
out.print_raw("# An error report file with more information is saved as:\n# ");
out.print_raw_cr(buffer);
os::set_error_file(buffer);
log.set_fd(fd);
} else {
out.print_raw_cr("# Can not save log file, dump to screen..");
log.set_fd(defaultStream::output_fd());
/* Error reporting currently needs dumpfile.
* Maybe implement direct streaming in the future.*/
transmit_report_done = true;
}
}
staticBufferStream sbs(buffer, O_BUFLEN, &log);
first_error->report(&sbs);
first_error->_current_step = 0; // reset current_step
first_error->_current_step_info = ""; // reset current_step string
// Run error reporting to determine whether or not to report the crash.
if (!transmit_report_done && should_report_bug(first_error->_id)) {
transmit_report_done = true;
FILE* hs_err = os::open(log.fd(), "r");
if (NULL != hs_err) {
ErrorReporter er;
er.call(hs_err, buffer, O_BUFLEN);
}
}
if (log.fd() != defaultStream::output_fd()) {
close(log.fd());
}
log.set_fd(-1);
log_done = true;
}
static bool skip_OnError = false;
if (!skip_OnError && OnError && OnError[0]) {
skip_OnError = true;
out.print_raw_cr("#");
out.print_raw ("# -XX:OnError=\"");
out.print_raw (OnError);
out.print_raw_cr("\"");
char* cmd;
const char* ptr = OnError;
while ((cmd = next_OnError_command(buffer, sizeof(buffer), &ptr)) != NULL){
out.print_raw ("# Executing ");
#if defined(LINUX) || defined(_ALLBSD_SOURCE)
out.print_raw ("/bin/sh -c ");
#elif defined(SOLARIS)
out.print_raw ("/usr/bin/sh -c ");
#endif
out.print_raw ("\"");
out.print_raw (cmd);
out.print_raw_cr("\" ...");
os::fork_and_exec(cmd);
}
// done with OnError
OnError = NULL;
}
static bool skip_replay = false;
if (DumpReplayDataOnError && _thread && _thread->is_Compiler_thread() && !skip_replay) {
skip_replay = true;
ciEnv* env = ciEnv::current();
if (env != NULL) {
int fd = prepare_log_file(ReplayDataFile, "replay_pid%p.log", buffer, sizeof(buffer));
if (fd != -1) {
FILE* replay_data_file = os::open(fd, "w");
if (replay_data_file != NULL) {
fileStream replay_data_stream(replay_data_file, /*need_close=*/true);
env->dump_replay_data_unsafe(&replay_data_stream);
out.print_raw("#\n# Compiler replay data is saved as:\n# ");
out.print_raw_cr(buffer);
} else {
out.print_raw("#\n# Can't open file to dump replay data. Error: ");
out.print_raw_cr(strerror(os::get_last_error()));
}
}
}
}
static bool skip_bug_url = !should_report_bug(first_error->_id);
if (!skip_bug_url) {
skip_bug_url = true;
out.print_raw_cr("#");
print_bug_submit_message(&out, _thread);
}
if (!UseOSErrorReporting) {
// os::abort() will call abort hooks, try it first.
static bool skip_os_abort = false;
if (!skip_os_abort) {
skip_os_abort = true;
bool dump_core = should_report_bug(first_error->_id);
os::abort(dump_core);
}
// if os::abort() doesn't abort, try os::die();
os::die();
}
}
/*
* OnOutOfMemoryError scripts/commands executed while VM is a safepoint - this
* ensures utilities such as jmap can observe the process is a consistent state.
*/
class VM_ReportJavaOutOfMemory : public VM_Operation {
private:
VMError *_err;
public:
VM_ReportJavaOutOfMemory(VMError *err) { _err = err; }
VMOp_Type type() const { return VMOp_ReportJavaOutOfMemory; }
void doit();
};
void VM_ReportJavaOutOfMemory::doit() {
// Don't allocate large buffer on stack
static char buffer[O_BUFLEN];
tty->print_cr("#");
tty->print_cr("# java.lang.OutOfMemoryError: %s", _err->message());
tty->print_cr("# -XX:OnOutOfMemoryError=\"%s\"", OnOutOfMemoryError);
// make heap parsability
Universe::heap()->ensure_parsability(false); // no need to retire TLABs
char* cmd;
const char* ptr = OnOutOfMemoryError;
while ((cmd = next_OnError_command(buffer, sizeof(buffer), &ptr)) != NULL){
tty->print("# Executing ");
#if defined(LINUX)
tty->print ("/bin/sh -c ");
#elif defined(SOLARIS)
tty->print ("/usr/bin/sh -c ");
#endif
tty->print_cr("\"%s\"...", cmd);
os::fork_and_exec(cmd);
}
}
void VMError::report_java_out_of_memory() {
if (OnOutOfMemoryError && OnOutOfMemoryError[0]) {
MutexLocker ml(Heap_lock);
VM_ReportJavaOutOfMemory op(this);
VMThread::execute(&op);
}
}
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