Mercurial > hg > graal-compiler
view src/share/vm/utilities/vmError.cpp @ 477:24fda36852ce
6727377: VM stack guard pages on Windows should PAGE_READWRITE not PAGE_EXECUTE_READWRITE
Summary: Make reguard_stack change access to RW, not execute and use os::protect_memory with the new parameter when change needed to X.
Reviewed-by: acorn, jcoomes
author | coleenp |
---|---|
date | Wed, 10 Dec 2008 15:14:29 -0800 |
parents | 3ad2b8576c4a |
children | dabd8d202164 |
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/* * Copyright 2003-2008 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.cpp.incl" // 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 "LD_LIBRARY_PATH", "LD_PRELOAD", "SHELL", "DISPLAY", "HOSTTYPE", "OSTYPE", "ARCH", "MACHTYPE", // defined on Linux "LD_ASSUME_KERNEL", "_JAVA_SR_SIGNUM", // 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, 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 = ""; _filename = NULL; _lineno = 0; _size = 0; } // Constructor for internal errors VMError::VMError(Thread* thread, const char* message, const char* filename, int lineno) { _thread = thread; _id = internal_error; // set it to a value that's not an OS exception/signal _filename = filename; _lineno = lineno; _message = message; _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, size_t size, const char* message, const char* filename, int lineno) { _thread = thread; _id = oom_error; // set it to a value that's not an OS exception/signal _filename = filename; _lineno = lineno; _message = message; _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; // set it to a value that's not an OS exception/signal _filename = NULL; _lineno = 0; _message = message; _verbose = false; _current_step = 0; _current_step_info = NULL; _pc = NULL; _siginfo = NULL; _context = NULL; _size = 0; } // -XX:OnError=<string>, where <string> 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("#"); } // 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); jio_snprintf(buf, buflen, "Internal Error at %s:%d, pid=%d, tid=" UINTX_FORMAT " \nError: %s", p ? p + 1 : _filename, _lineno, os::current_process_id(), os::current_thread_id(), _message ? _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; } // 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("#"); st->print_cr("# A fatal error has been detected by the Java Runtime Environment:"); STEP(15, "(printing type of error)") switch(_id) { case oom_error: st->print_cr("#"); st->print("# java.lang.OutOfMemoryError: "); if (_size) { st->print("requested "); sprintf(buf,SIZE_FORMAT,_size); st->print(buf); st->print(" bytes"); if (_message != NULL) { st->print(" for "); st->print(_message); } st->print_cr(". Out of swap space?"); } else { if (_message != NULL) st->print_cr(_message); } 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 { st->print("Internal 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, ":" SIZE_FORMAT, _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)") // error message if (_message && _message[0] != '\0') { 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(65, "(printing bug submit message)") if (_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(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()); st->print(", free space=%dk", ((intptr_t)fr.sp() - (intptr_t)stack_bottom) >> 10); } 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()) { JavaThread* jt = (JavaThread*)_thread; 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, sizeof(buf)); st->cr(); } } } 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 Universe::print_on(st); st->cr(); } STEP(200, "(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_and_die() { // Don't allocate large buffer on stack static char buffer[O_BUFLEN]; // First error, and its thread id. We must be able to handle native thread, // so use thread id instead of Thread* to identify thread. static VMError* first_error; static jlong first_error_tid; // 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. static fdStream out(defaultStream::output_fd()); // 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 fdStream log; // error log 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) { 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; } // reset signal handlers or exception filter; make sure recursive crashes // are handled properly. reset_signal_handlers(); } else { // 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) { jio_snprintf(buffer, sizeof(buffer), "[thread " INT64_FORMAT " also had an error]", mytid); out.print_raw_cr(buffer); // 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 = -1; if (ErrorFile != NULL) { bool copy_ok = Arguments::copy_expand_pid(ErrorFile, strlen(ErrorFile), buffer, sizeof(buffer)); if (copy_ok) { fd = open(buffer, O_WRONLY | O_CREAT | O_TRUNC, 0666); } } if (fd == -1) { const char *cwd = os::get_current_directory(buffer, sizeof(buffer)); size_t len = strlen(cwd); // either user didn't specify, or the user's location failed, // so use the default name in the current directory jio_snprintf(&buffer[len], sizeof(buffer)-len, "%shs_err_pid%u.log", os::file_separator(), os::current_process_id()); fd = open(buffer, O_WRONLY | O_CREAT | O_TRUNC, 0666); } if (fd == -1) { // try temp directory const char * tmpdir = os::get_temp_directory(); jio_snprintf(buffer, sizeof(buffer), "%shs_err_pid%u.log", (tmpdir ? tmpdir : ""), os::current_process_id()); fd = open(buffer, O_WRONLY | O_CREAT | O_TRUNC, 0666); } 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()); } } 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 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) 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_bug_url = false; 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; os::abort(); } // 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); } }