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_error:
if (_size) {
st->print("# Native memory allocation (malloc) failed to allocate ");
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));
st->print_cr("# JRE version: %s", buf);
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) {
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();
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()) {
// Print heap information before vm abort. As we'd like as much
// information as possible in the report we ask for the
// extended (i.e., more detailed) version.
Universe::print_on(st, true /* extended */);
st->cr();
Universe::heap()->barrier_set()->print_on(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_bounds(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(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
}
void VMError::report(outputStream* st, bool _verbose) {
# define BEGIN if (_current_step == 0) { _current_step = __LINE__;
# define STEP(s) } if (_current_step < __LINE__) { _current_step = __LINE__; _current_step_info = s;
# define END }
// don't allocate large buffer on stack
static char buf[O_BUFLEN];
BEGIN
STEP("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.");
}
#ifndef PRODUCT
// Error handler self tests
// test secondary error handling. Test it twice, to test that resetting
// error handler after a secondary crash works.
STEP("test secondary crash 1")
if (_verbose && TestCrashInErrorHandler != 0) {
st->print_cr("Will crash now (TestCrashInErrorHandler=" UINTX_FORMAT ")...",
TestCrashInErrorHandler);
controlled_crash(TestCrashInErrorHandler);
}
STEP("test secondary crash 2")
if (_verbose && TestCrashInErrorHandler != 0) {
st->print_cr("Will crash now (TestCrashInErrorHandler=" UINTX_FORMAT ")...",
TestCrashInErrorHandler);
controlled_crash(TestCrashInErrorHandler);
}
STEP("test safefetch in error handler")
// test whether it is safe to use SafeFetch32 in Crash Handler. Test twice
// to test that resetting the signal handler works correctly.
if (_verbose && TestSafeFetchInErrorHandler) {
st->print_cr("Will test SafeFetch...");
if (CanUseSafeFetch32()) {
int* const invalid_pointer = (int*) get_segfault_address();
const int x = 0x76543210;
int i1 = SafeFetch32(invalid_pointer, x);
int i2 = SafeFetch32(invalid_pointer, x);
if (i1 == x && i2 == x) {
st->print_cr("SafeFetch OK."); // Correctly deflected and returned default pattern
} else {
st->print_cr("??");
}
} else {
st->print_cr("not possible; skipped.");
}
}
#endif // PRODUCT
STEP("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("%s", buf);
st->print(" bytes");
if (strlen(_detail_msg) > 0) {
st->print(" for ");
st->print("%s", _detail_msg);
}
st->cr();
} else {
if (strlen(_detail_msg) > 0) {
st->print("# ");
st->print_cr("%s", _detail_msg);
}
}
// In error file give some solutions
if (_verbose) {
print_oom_reasons(st);
} else {
return; // that's enough for the screen
}
break;
case INTERNAL_ERROR:
default:
break;
}
STEP("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, p2i(_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
st->print(" (%s:%d)", file, _lineno);
} else {
st->print(" (0x%x)", _id);
}
}
STEP("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("printing error message")
if (should_report_bug(_id)) { // already printed the message.
// error message
if (strlen(_detail_msg) > 0) {
st->print_cr("# %s: %s", _message ? _message : "Error", _detail_msg);
} else if (_message) {
st->print_cr("# Error: %s", _message);
}
}
STEP("printing Java version string")
report_vm_version(st, buf, sizeof(buf));
STEP("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("printing core file information")
st->print("# ");
if (CreateCoredumpOnCrash) {
if (coredump_status) {
st->print("Core dump will be written. Default location: %s", coredump_message);
} else {
st->print("No core dump will be written. %s", coredump_message);
}
} else {
st->print("CreateCoredumpOnCrash turned off, no core file dumped");
}
st->cr();
st->print_cr("#");
STEP("printing bug submit message")
if (should_report_bug(_id) && _verbose) {
print_bug_submit_message(st, _thread);
}
STEP("printing summary")
if (_verbose) {
st->cr();
st->print_cr("--------------- S U M M A R Y ------------");
st->cr();
}
STEP("printing VM option summary")
if (_verbose) {
// VM options
Arguments::print_summary_on(st);
st->cr();
}
STEP("printing summary machine and OS info")
if (_verbose) {
os::print_summary_info(st, buf, sizeof(buf));
}
STEP("printing date and time")
if (_verbose) {
os::print_date_and_time(st, buf, sizeof(buf));
}
STEP("printing thread")
if (_verbose) {
st->cr();
st->print_cr("--------------- T H R E A D ---------------");
st->cr();
}
STEP("printing current thread")
// current thread
if (_verbose) {
if (_thread) {
st->print("Current thread (" PTR_FORMAT "): ", p2i(_thread));
_thread->print_on_error(st, buf, sizeof(buf));
st->cr();
} else {
st->print_cr("Current thread is native thread");
}
st->cr();
}
STEP("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("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 "]", p2i(stack_bottom), p2i(stack_top));
frame fr = _context ? os::fetch_frame_from_context(_context)
: os::current_frame();
if (fr.sp()) {
st->print(", sp=" PTR_FORMAT, p2i(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("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();
print_native_stack(st, fr, _thread, buf, sizeof(buf));
}
}
STEP("printing Java stack")
if (_verbose && _thread && _thread->is_Java_thread()) {
print_stack_trace(st, (JavaThread*)_thread, buf, sizeof(buf));
}
STEP("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 = %d) was being processed", p2i(jt), jt->osthread()->thread_id());
print_stack_trace(st, jt, buf, sizeof(buf), true);
}
}
STEP("printing siginfo")
// signal no, signal code, address that caused the fault
if (_verbose && _siginfo) {
st->cr();
os::print_siginfo(st, _siginfo);
st->cr();
}
STEP("CDS archive access warning")
// Print an explicit hint if we crashed on access to the CDS archive.
if (_verbose && _siginfo) {
check_failing_cds_access(st, _siginfo);
st->cr();
}
STEP("printing register info")
// decode register contents if possible
if (_verbose && _context && Universe::is_fully_initialized()) {
os::print_register_info(st, _context);
st->cr();
}
STEP("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("printing code blob if possible")
if (_verbose && _context) {
CodeBlob* cb = CodeCache::find_blob(_pc);
if (cb != NULL) {
if (Interpreter::contains(_pc)) {
// The interpreter CodeBlob is very large so try to print the codelet instead.
InterpreterCodelet* codelet = Interpreter::codelet_containing(_pc);
if (codelet != NULL) {
codelet->print_on(st);
Disassembler::decode(codelet->code_begin(), codelet->code_end(), st);
}
} else {
StubCodeDesc* desc = StubCodeDesc::desc_for(_pc);
if (desc != NULL) {
desc->print_on(st);
Disassembler::decode(desc->begin(), desc->end(), st);
} else {
Disassembler::decode(cb, st);
st->cr();
}
}
}
}
STEP("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("printing process")
if (_verbose) {
st->cr();
st->print_cr("--------------- P R O C E S S ---------------");
st->cr();
}
STEP("printing all threads")
// all threads
if (_verbose && _thread) {
Threads::print_on_error(st, _thread, buf, sizeof(buf));
st->cr();
}
STEP("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("printing owned locks on error")
// mutexes/monitors that currently have an owner
if (_verbose) {
print_owned_locks_on_error(st);
st->cr();
}
STEP("printing number of OutOfMemoryError and StackOverflow exceptions")
if (_verbose && Exceptions::has_exception_counts()) {
st->print_cr("OutOfMemory and StackOverflow Exception counts:");
Exceptions::print_exception_counts_on_error(st);
st->cr();
}
STEP("printing compressed oops mode")
if (_verbose && UseCompressedOops) {
Universe::print_compressed_oops_mode(st);
if (UseCompressedClassPointers) {
Metaspace::print_compressed_class_space(st);
}
st->cr();
}
STEP("printing heap information")
if (_verbose && Universe::is_fully_initialized()) {
Universe::heap()->print_on_error(st);
st->cr();
st->print_cr("Polling page: " INTPTR_FORMAT, p2i(os::get_polling_page()));
st->cr();
}
STEP("printing code cache information")
if (_verbose && Universe::is_fully_initialized()) {
// print code cache information before vm abort
CodeCache::print_summary(st);
st->cr();
}
STEP("printing ring buffers")
if (_verbose) {
Events::print_all(st);
st->cr();
}
STEP("printing dynamic libraries")
if (_verbose) {
// dynamic libraries, or memory map
os::print_dll_info(st);
st->cr();
}
STEP("printing VM options")
if (_verbose) {
// VM options
Arguments::print_on(st);
st->cr();
}
STEP("printing warning if internal testing API used")
if (WhiteBox::used()) {
st->print_cr("Unsupported internal testing APIs have been used.");
st->cr();
}
STEP("printing log configuration")
if (_verbose){
st->print_cr("Logging:");
LogConfiguration::describe_current_configuration(st);
st->cr();
}
STEP("printing all environment variables")
if (_verbose) {
os::print_environment_variables(st, env_list);
st->cr();
}
STEP("printing signal handlers")
if (_verbose) {
os::print_signal_handlers(st, buf, sizeof(buf));
st->cr();
}
STEP("Native Memory Tracking")
if (_verbose) {
MemTracker::error_report(st);
}
STEP("printing system")
if (_verbose) {
st->cr();
st->print_cr("--------------- S Y S T E M ---------------");
st->cr();
}
STEP("printing OS information")
if (_verbose) {
os::print_os_info(st);
st->cr();
}
STEP("printing CPU info")
if (_verbose) {
os::print_cpu_info(st, buf, sizeof(buf));
st->cr();
}
STEP("printing memory info")
if (_verbose) {
os::print_memory_info(st);
st->cr();
}
STEP("printing internal vm info")
if (_verbose) {
st->print_cr("vm_info: %s", Abstract_VM_Version::internal_vm_info_string());
st->cr();
}
// print a defined marker to show that error handling finished correctly.
STEP("printing end marker")
if (_verbose) {
st->print_cr("END.");
}
END
# undef BEGIN
# undef STEP
# undef END
}
extern "C" JNIEXPORT int
JVM_handle_linux_signal(int sig,
siginfo_t* info,
void* ucVoid,
int abort_if_unrecognized) {
ucontext_t* uc = (ucontext_t*) ucVoid;
Thread* t = ThreadLocalStorage::get_thread_slow();
SignalHandlerMark shm(t);
// Note: it's not uncommon that JNI code uses signal/sigset to
// install then restore certain signal handler (e.g. to temporarily
// block SIGPIPE, or have a SIGILL handler when detecting CPU
// type). When that happens, JVM_handle_linux_signal() might be
// invoked with junk info/ucVoid. To avoid unnecessary crash when
// libjsig is not preloaded, try handle signals that do not require
// siginfo/ucontext first.
if (sig == SIGPIPE || sig == SIGXFSZ) {
// allow chained handler to go first
if (os::Linux::chained_handler(sig, info, ucVoid)) {
return true;
} else {
if (PrintMiscellaneous && (WizardMode || Verbose)) {
char buf[64];
warning("Ignoring %s - see bugs 4229104 or 646499219",
os::exception_name(sig, buf, sizeof(buf)));
}
return true;
}
}
JavaThread* thread = NULL;
VMThread* vmthread = NULL;
if (os::Linux::signal_handlers_are_installed) {
if (t != NULL ){
if(t->is_Java_thread()) {
thread = (JavaThread*)t;
}
else if(t->is_VM_thread()){
vmthread = (VMThread *)t;
}
}
}
if (info != NULL && thread != NULL) {
// Handle ALL stack overflow variations here
if (sig == SIGSEGV) {
address addr = (address) info->si_addr;
// check if fault address is within thread stack
if (addr < thread->stack_base() &&
addr >= thread->stack_base() - thread->stack_size()) {
// stack overflow
if (thread->in_stack_yellow_zone(addr)) {
thread->disable_stack_yellow_zone();
ShouldNotCallThis();
}
else if (thread->in_stack_red_zone(addr)) {
thread->disable_stack_red_zone();
ShouldNotCallThis();
}
else {
// Accessing stack address below sp may cause SEGV if
// current thread has MAP_GROWSDOWN stack. This should
// only happen when current thread was created by user
// code with MAP_GROWSDOWN flag and then attached to VM.
// See notes in os_linux.cpp.
if (thread->osthread()->expanding_stack() == 0) {
thread->osthread()->set_expanding_stack();
if (os::Linux::manually_expand_stack(thread, addr)) {
thread->osthread()->clear_expanding_stack();
return true;
}
thread->osthread()->clear_expanding_stack();
}
else {
fatal("recursive segv. expanding stack.");
}
}
}
}
/*if (thread->thread_state() == _thread_in_Java) {
ShouldNotCallThis();
}
else*/ if (thread->thread_state() == _thread_in_vm &&
sig == SIGBUS && thread->doing_unsafe_access()) {
ShouldNotCallThis();
}
// jni_fast_Get<Primitive>Field can trap at certain pc's if a GC
// kicks in and the heap gets shrunk before the field access.
/*if (sig == SIGSEGV || sig == SIGBUS) {
address addr = JNI_FastGetField::find_slowcase_pc(pc);
if (addr != (address)-1) {
stub = addr;
}
}*/
// Check to see if we caught the safepoint code in the process
// of write protecting the memory serialization page. It write
// enables the page immediately after protecting it so we can
// just return to retry the write.
if (sig == SIGSEGV &&
os::is_memory_serialize_page(thread, (address) info->si_addr)) {
// Block current thread until permission is restored.
os::block_on_serialize_page_trap();
return true;
}
}
// signal-chaining
if (os::Linux::chained_handler(sig, info, ucVoid)) {
return true;
}
if (!abort_if_unrecognized) {
// caller wants another chance, so give it to him
return false;
}
#ifndef PRODUCT
if (sig == SIGSEGV) {
fatal("\n#"
"\n# /--------------------\\"
"\n# | segmentation fault |"
"\n# \\---\\ /--------------/"
"\n# /"
"\n# [-] |\\_/| "
"\n# (+)=C |o o|__ "
"\n# | | =-*-=__\\ "
"\n# OOO c_c_(___)");
}
#endif // !PRODUCT
const char *fmt = "caught unhandled signal %d";
char buf[64];
sprintf(buf, fmt, sig);
fatal(buf);
}
extern "C" JNIEXPORT int
JVM_handle_linux_signal(int sig,
siginfo_t* info,
void* ucVoid,
int abort_if_unrecognized) {
ucontext_t* uc = (ucontext_t*) ucVoid;
Thread* t = ThreadLocalStorage::get_thread_slow();
// Must do this before SignalHandlerMark, if crash protection installed we will longjmp away
// (no destructors can be run)
os::WatcherThreadCrashProtection::check_crash_protection(sig, t);
SignalHandlerMark shm(t);
// Note: it's not uncommon that JNI code uses signal/sigset to install
// then restore certain signal handler (e.g. to temporarily block SIGPIPE,
// or have a SIGILL handler when detecting CPU type). When that happens,
// JVM_handle_linux_signal() might be invoked with junk info/ucVoid. To
// avoid unnecessary crash when libjsig is not preloaded, try handle signals
// that do not require siginfo/ucontext first.
if (sig == SIGPIPE || sig == SIGXFSZ) {
// allow chained handler to go first
if (os::Linux::chained_handler(sig, info, ucVoid)) {
return true;
} else {
if (PrintMiscellaneous && (WizardMode || Verbose)) {
char buf[64];
warning("Ignoring %s - see bugs 4229104 or 646499219",
os::exception_name(sig, buf, sizeof(buf)));
}
return true;
}
}
JavaThread* thread = NULL;
VMThread* vmthread = NULL;
if (os::Linux::signal_handlers_are_installed) {
if (t != NULL ){
if(t->is_Java_thread()) {
thread = (JavaThread*)t;
}
else if(t->is_VM_thread()){
vmthread = (VMThread *)t;
}
}
}
/*
NOTE: does not seem to work on linux.
if (info == NULL || info->si_code <= 0 || info->si_code == SI_NOINFO) {
// can't decode this kind of signal
info = NULL;
} else {
assert(sig == info->si_signo, "bad siginfo");
}
*/
// decide if this trap can be handled by a stub
address stub = NULL;
address pc = NULL;
//%note os_trap_1
if (info != NULL && uc != NULL && thread != NULL) {
pc = (address) os::Linux::ucontext_get_pc(uc);
#ifdef BUILTIN_SIM
if (pc == (address) Fetch32PFI) {
uc->uc_mcontext.gregs[REG_PC] = intptr_t(Fetch32Resume) ;
return 1 ;
}
if (pc == (address) FetchNPFI) {
uc->uc_mcontext.gregs[REG_PC] = intptr_t (FetchNResume) ;
return 1 ;
}
#else
if (StubRoutines::is_safefetch_fault(pc)) {
uc->uc_mcontext.pc = intptr_t(StubRoutines::continuation_for_safefetch_fault(pc));
return 1;
}
#endif
#ifndef AMD64
// Halt if SI_KERNEL before more crashes get misdiagnosed as Java bugs
// This can happen in any running code (currently more frequently in
// interpreter code but has been seen in compiled code)
if (sig == SIGSEGV && info->si_addr == 0 && info->si_code == SI_KERNEL) {
fatal("An irrecoverable SI_KERNEL SIGSEGV has occurred due "
"to unstable signal handling in this distribution.");
}
#endif // AMD64
// Handle ALL stack overflow variations here
if (sig == SIGSEGV) {
address addr = (address) info->si_addr;
// check if fault address is within thread stack
if (addr < thread->stack_base() &&
addr >= thread->stack_base() - thread->stack_size()) {
// stack overflow
if (thread->in_stack_yellow_zone(addr)) {
thread->disable_stack_yellow_zone();
if (thread->thread_state() == _thread_in_Java) {
// Throw a stack overflow exception. Guard pages will be reenabled
// while unwinding the stack.
stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW);
} else {
// Thread was in the vm or native code. Return and try to finish.
return 1;
}
} else if (thread->in_stack_red_zone(addr)) {
// Fatal red zone violation. Disable the guard pages and fall through
// to handle_unexpected_exception way down below.
thread->disable_stack_red_zone();
tty->print_raw_cr("An irrecoverable stack overflow has occurred.");
// This is a likely cause, but hard to verify. Let's just print
// it as a hint.
tty->print_raw_cr("Please check if any of your loaded .so files has "
"enabled executable stack (see man page execstack(8))");
} else {
// Accessing stack address below sp may cause SEGV if current
// thread has MAP_GROWSDOWN stack. This should only happen when
// current thread was created by user code with MAP_GROWSDOWN flag
// and then attached to VM. See notes in os_linux.cpp.
if (thread->osthread()->expanding_stack() == 0) {
thread->osthread()->set_expanding_stack();
if (os::Linux::manually_expand_stack(thread, addr)) {
thread->osthread()->clear_expanding_stack();
return 1;
}
thread->osthread()->clear_expanding_stack();
} else {
fatal("recursive segv. expanding stack.");
}
}
}
}
if (thread->thread_state() == _thread_in_Java) {
// Java thread running in Java code => find exception handler if any
// a fault inside compiled code, the interpreter, or a stub
// Handle signal from NativeJump::patch_verified_entry().
if ((sig == SIGILL || sig == SIGTRAP)
&& nativeInstruction_at(pc)->is_sigill_zombie_not_entrant()) {
if (TraceTraps) {
tty->print_cr("trap: zombie_not_entrant (%s)", (sig == SIGTRAP) ? "SIGTRAP" : "SIGILL");
}
stub = SharedRuntime::get_handle_wrong_method_stub();
} else if (sig == SIGSEGV && os::is_poll_address((address)info->si_addr)) {
stub = SharedRuntime::get_poll_stub(pc);
} else if (sig == SIGBUS /* && info->si_code == BUS_OBJERR */) {
// BugId 4454115: A read from a MappedByteBuffer can fault
// here if the underlying file has been truncated.
// Do not crash the VM in such a case.
CodeBlob* cb = CodeCache::find_blob_unsafe(pc);
nmethod* nm = (cb != NULL && cb->is_nmethod()) ? (nmethod*)cb : NULL;
if (nm != NULL && nm->has_unsafe_access()) {
stub = handle_unsafe_access(thread, pc);
}
}
else
if (sig == SIGFPE &&
(info->si_code == FPE_INTDIV || info->si_code == FPE_FLTDIV)) {
stub =
SharedRuntime::
continuation_for_implicit_exception(thread,
pc,
SharedRuntime::
IMPLICIT_DIVIDE_BY_ZERO);
} else if (sig == SIGSEGV &&
!MacroAssembler::needs_explicit_null_check((intptr_t)info->si_addr)) {
// Determination of interpreter/vtable stub/compiled code null exception
stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL);
}
} else if (thread->thread_state() == _thread_in_vm &&
sig == SIGBUS && /* info->si_code == BUS_OBJERR && */
thread->doing_unsafe_access()) {
stub = handle_unsafe_access(thread, pc);
}
// jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks in
// and the heap gets shrunk before the field access.
if ((sig == SIGSEGV) || (sig == SIGBUS)) {
address addr = JNI_FastGetField::find_slowcase_pc(pc);
if (addr != (address)-1) {
stub = addr;
}
}
// Check to see if we caught the safepoint code in the
// process of write protecting the memory serialization page.
// It write enables the page immediately after protecting it
// so we can just return to retry the write.
if ((sig == SIGSEGV) &&
os::is_memory_serialize_page(thread, (address) info->si_addr)) {
// Block current thread until the memory serialize page permission restored.
os::block_on_serialize_page_trap();
return true;
}
}
if (stub != NULL) {
// save all thread context in case we need to restore it
if (thread != NULL) thread->set_saved_exception_pc(pc);
#ifdef BUILTIN_SIM
uc->uc_mcontext.gregs[REG_PC] = (greg_t)stub;
#else
uc->uc_mcontext.pc = (__u64)stub;
#endif
return true;
}
// signal-chaining
if (os::Linux::chained_handler(sig, info, ucVoid)) {
return true;
}
if (!abort_if_unrecognized) {
// caller wants another chance, so give it to him
return false;
}
if (pc == NULL && uc != NULL) {
pc = os::Linux::ucontext_get_pc(uc);
}
// unmask current signal
sigset_t newset;
sigemptyset(&newset);
sigaddset(&newset, sig);
sigprocmask(SIG_UNBLOCK, &newset, NULL);
VMError err(t, sig, pc, info, ucVoid);
err.report_and_die();
ShouldNotReachHere();
}
