зеркало из https://github.com/mozilla/moz-skia.git
Gate CrashHandler with SK_CRASH_HANDLER.
BUG=skia: R=bsalomon@google.com, mtklein@google.com Author: mtklein@chromium.org Review URL: https://codereview.chromium.org/364033002
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mtklein
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0e3fac215d
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@ -4,169 +4,178 @@
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#include <stdlib.h>
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#if defined(SK_BUILD_FOR_MAC)
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// We only use local unwinding, so we can define this to select a faster implementation.
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#define UNW_LOCAL_ONLY
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#include <libunwind.h>
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#include <cxxabi.h>
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static void handler(int sig) {
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unw_context_t context;
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unw_getcontext(&context);
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unw_cursor_t cursor;
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unw_init_local(&cursor, &context);
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SkDebugf("\nSignal %d:\n", sig);
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while (unw_step(&cursor) > 0) {
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static const size_t kMax = 256;
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char mangled[kMax], demangled[kMax];
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unw_word_t offset;
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unw_get_proc_name(&cursor, mangled, kMax, &offset);
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int ok;
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size_t len = kMax;
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abi::__cxa_demangle(mangled, demangled, &len, &ok);
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SkDebugf("%s (+0x%zx)\n", ok == 0 ? demangled : mangled, (size_t)offset);
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}
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SkDebugf("\n");
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// Exit NOW. Don't notify other threads, don't call anything registered with atexit().
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_Exit(sig);
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}
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#elif defined(SK_BUILD_FOR_UNIX) && !defined(SK_BUILD_FOR_NACL) // NACL doesn't have backtrace().
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// We'd use libunwind here too, but it's a pain to get installed for both 32 and 64 bit on bots.
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// Doesn't matter much: catchsegv is best anyway.
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#include <execinfo.h>
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static void handler(int sig) {
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static const int kMax = 64;
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void* stack[kMax];
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const int count = backtrace(stack, kMax);
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SkDebugf("\nSignal %d [%s]:\n", sig, strsignal(sig));
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backtrace_symbols_fd(stack, count, 2/*stderr*/);
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// Exit NOW. Don't notify other threads, don't call anything registered with atexit().
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_Exit(sig);
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}
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#endif
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#if defined(SK_BUILD_FOR_MAC) || (defined(SK_BUILD_FOR_UNIX) && !defined(SK_BUILD_FOR_NACL))
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#include <signal.h>
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void SetupCrashHandler() {
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static const int kSignals[] = {
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SIGABRT,
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SIGBUS,
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SIGFPE,
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SIGILL,
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SIGSEGV,
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};
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for (size_t i = 0; i < sizeof(kSignals) / sizeof(kSignals[0]); i++) {
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// Register our signal handler unless something's already done so (e.g. catchsegv).
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void (*prev)(int) = signal(kSignals[i], handler);
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if (prev != SIG_DFL) {
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signal(kSignals[i], prev);
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}
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}
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}
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#elif defined(SK_BUILD_FOR_WIN)
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#include <DbgHelp.h>
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static const struct {
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const char* name;
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int code;
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} kExceptions[] = {
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#define _(E) {#E, E}
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_(EXCEPTION_ACCESS_VIOLATION),
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_(EXCEPTION_BREAKPOINT),
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_(EXCEPTION_INT_DIVIDE_BY_ZERO),
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_(EXCEPTION_STACK_OVERFLOW),
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// TODO: more?
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#undef _
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};
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static LONG WINAPI handler(EXCEPTION_POINTERS* e) {
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const DWORD code = e->ExceptionRecord->ExceptionCode;
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SkDebugf("\nCaught exception %u", code);
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for (size_t i = 0; i < SK_ARRAY_COUNT(kExceptions); i++) {
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if (kExceptions[i].code == code) {
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SkDebugf(" %s", kExceptions[i].name);
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}
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}
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SkDebugf("\n");
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// We need to run SymInitialize before doing any of the stack walking below.
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HANDLE hProcess = GetCurrentProcess();
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SymInitialize(hProcess, 0, true);
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STACKFRAME64 frame;
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sk_bzero(&frame, sizeof(frame));
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// Start frame off from the frame that triggered the exception.
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CONTEXT* c = e->ContextRecord;
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frame.AddrPC.Mode = AddrModeFlat;
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frame.AddrStack.Mode = AddrModeFlat;
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frame.AddrFrame.Mode = AddrModeFlat;
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#if defined(_X86_)
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frame.AddrPC.Offset = c->Eip;
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frame.AddrStack.Offset = c->Esp;
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frame.AddrFrame.Offset = c->Ebp;
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const DWORD machineType = IMAGE_FILE_MACHINE_I386;
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#elif defined(_AMD64_)
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frame.AddrPC.Offset = c->Rip;
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frame.AddrStack.Offset = c->Rsp;
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frame.AddrFrame.Offset = c->Rbp;
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const DWORD machineType = IMAGE_FILE_MACHINE_AMD64;
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#endif
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while (StackWalk64(machineType,
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GetCurrentProcess(),
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GetCurrentThread(),
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&frame,
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c,
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NULL,
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SymFunctionTableAccess64,
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SymGetModuleBase64,
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NULL)) {
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// Buffer to store symbol name in.
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static const int kMaxNameLength = 1024;
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uint8_t buffer[sizeof(IMAGEHLP_SYMBOL64) + kMaxNameLength];
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sk_bzero(buffer, sizeof(buffer));
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// We have to place IMAGEHLP_SYMBOL64 at the front, and fill in how much space it can use.
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IMAGEHLP_SYMBOL64* symbol = reinterpret_cast<IMAGEHLP_SYMBOL64*>(&buffer);
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symbol->SizeOfStruct = sizeof(IMAGEHLP_SYMBOL64);
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symbol->MaxNameLength = kMaxNameLength - 1;
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// Translate the current PC into a symbol and byte offset from the symbol.
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DWORD64 offset;
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SymGetSymFromAddr64(hProcess, frame.AddrPC.Offset, &offset, symbol);
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SkDebugf("%s +%x\n", symbol->Name, offset);
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}
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// Exit NOW. Don't notify other threads, don't call anything registered with atexit().
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_exit(1);
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// The compiler wants us to return something. This is what we'd do if we didn't _exit().
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return EXCEPTION_EXECUTE_HANDLER;
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}
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void SetupCrashHandler() {
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SetUnhandledExceptionFilter(handler);
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}
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// Disable SetupCrashHandler() unless SK_CRASH_HANDLER is defined.
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#ifndef SK_CRASH_HANDLER
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void SetupCrashHandler() { }
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#else
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void SetupCrashHandler() { }
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#if defined(SK_BUILD_FOR_MAC)
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#endif
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// We only use local unwinding, so we can define this to select a faster implementation.
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#define UNW_LOCAL_ONLY
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#include <libunwind.h>
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#include <cxxabi.h>
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static void handler(int sig) {
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unw_context_t context;
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unw_getcontext(&context);
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unw_cursor_t cursor;
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unw_init_local(&cursor, &context);
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SkDebugf("\nSignal %d:\n", sig);
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while (unw_step(&cursor) > 0) {
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static const size_t kMax = 256;
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char mangled[kMax], demangled[kMax];
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unw_word_t offset;
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unw_get_proc_name(&cursor, mangled, kMax, &offset);
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int ok;
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size_t len = kMax;
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abi::__cxa_demangle(mangled, demangled, &len, &ok);
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SkDebugf("%s (+0x%zx)\n", ok == 0 ? demangled : mangled, (size_t)offset);
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}
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SkDebugf("\n");
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// Exit NOW. Don't notify other threads, don't call anything registered with atexit().
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_Exit(sig);
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}
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#elif defined(SK_BUILD_FOR_UNIX) && !defined(SK_BUILD_FOR_NACL) // NACL doesn't have backtrace.
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// We'd use libunwind here too, but it's a pain to get installed for
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// both 32 and 64 bit on bots. Doesn't matter much: catchsegv is best anyway.
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#include <execinfo.h>
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static void handler(int sig) {
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static const int kMax = 64;
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void* stack[kMax];
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const int count = backtrace(stack, kMax);
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SkDebugf("\nSignal %d [%s]:\n", sig, strsignal(sig));
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backtrace_symbols_fd(stack, count, 2/*stderr*/);
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// Exit NOW. Don't notify other threads, don't call anything registered with atexit().
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_Exit(sig);
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}
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#endif
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#if (defined(SK_BUILD_FOR_MAC) || (defined(SK_BUILD_FOR_UNIX) && !defined(SK_BUILD_FOR_NACL)))
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#include <signal.h>
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void SetupCrashHandler() {
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static const int kSignals[] = {
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SIGABRT,
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SIGBUS,
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SIGFPE,
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SIGILL,
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SIGSEGV,
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};
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for (size_t i = 0; i < sizeof(kSignals) / sizeof(kSignals[0]); i++) {
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// Register our signal handler unless something's already done so (e.g. catchsegv).
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void (*prev)(int) = signal(kSignals[i], handler);
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if (prev != SIG_DFL) {
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signal(kSignals[i], prev);
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}
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}
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}
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#elif defined(SK_CRASH_HANDLER) && defined(SK_BUILD_FOR_WIN)
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#include <DbgHelp.h>
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static const struct {
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const char* name;
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int code;
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} kExceptions[] = {
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#define _(E) {#E, E}
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_(EXCEPTION_ACCESS_VIOLATION),
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_(EXCEPTION_BREAKPOINT),
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_(EXCEPTION_INT_DIVIDE_BY_ZERO),
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_(EXCEPTION_STACK_OVERFLOW),
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// TODO: more?
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#undef _
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};
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static LONG WINAPI handler(EXCEPTION_POINTERS* e) {
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const DWORD code = e->ExceptionRecord->ExceptionCode;
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SkDebugf("\nCaught exception %u", code);
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for (size_t i = 0; i < SK_ARRAY_COUNT(kExceptions); i++) {
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if (kExceptions[i].code == code) {
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SkDebugf(" %s", kExceptions[i].name);
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}
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}
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SkDebugf("\n");
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// We need to run SymInitialize before doing any of the stack walking below.
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HANDLE hProcess = GetCurrentProcess();
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SymInitialize(hProcess, 0, true);
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STACKFRAME64 frame;
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sk_bzero(&frame, sizeof(frame));
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// Start frame off from the frame that triggered the exception.
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CONTEXT* c = e->ContextRecord;
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frame.AddrPC.Mode = AddrModeFlat;
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frame.AddrStack.Mode = AddrModeFlat;
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frame.AddrFrame.Mode = AddrModeFlat;
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#if defined(_X86_)
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frame.AddrPC.Offset = c->Eip;
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frame.AddrStack.Offset = c->Esp;
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frame.AddrFrame.Offset = c->Ebp;
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const DWORD machineType = IMAGE_FILE_MACHINE_I386;
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#elif defined(_AMD64_)
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frame.AddrPC.Offset = c->Rip;
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frame.AddrStack.Offset = c->Rsp;
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frame.AddrFrame.Offset = c->Rbp;
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const DWORD machineType = IMAGE_FILE_MACHINE_AMD64;
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#endif
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while (StackWalk64(machineType,
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GetCurrentProcess(),
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GetCurrentThread(),
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&frame,
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c,
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NULL,
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SymFunctionTableAccess64,
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SymGetModuleBase64,
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NULL)) {
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// Buffer to store symbol name in.
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static const int kMaxNameLength = 1024;
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uint8_t buffer[sizeof(IMAGEHLP_SYMBOL64) + kMaxNameLength];
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sk_bzero(buffer, sizeof(buffer));
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// We have to place IMAGEHLP_SYMBOL64 at the front, and fill in
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// how much space it can use.
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IMAGEHLP_SYMBOL64* symbol = reinterpret_cast<IMAGEHLP_SYMBOL64*>(&buffer);
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symbol->SizeOfStruct = sizeof(IMAGEHLP_SYMBOL64);
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symbol->MaxNameLength = kMaxNameLength - 1;
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// Translate the current PC into a symbol and byte offset from the symbol.
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DWORD64 offset;
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SymGetSymFromAddr64(hProcess, frame.AddrPC.Offset, &offset, symbol);
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SkDebugf("%s +%x\n", symbol->Name, offset);
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}
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// Exit NOW. Don't notify other threads, don't call anything registered with atexit().
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_exit(1);
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// The compiler wants us to return something. This is what we'd do
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// if we didn't _exit().
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return EXCEPTION_EXECUTE_HANDLER;
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}
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void SetupCrashHandler() {
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SetUnhandledExceptionFilter(handler);
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}
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#else // We asked for SK_CRASH_HANDLER, but it's not Mac, Linux, or Windows. Sorry!
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void SetupCrashHandler() { }
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#endif
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#endif // SK_CRASH_HANDLER
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@ -1,9 +1,11 @@
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#ifndef CrashHandler_DEFINED
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#define CrashHandler_DEFINED
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// If possible (and not already done) register a handler for a stack trace when we crash.
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// Currently this works on Linux and Mac, hopefully Windows soon.
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// On Linux, you will get much better results than we can deliver by running "catchsegv <program>".
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// If possible (and not already done), and SK_CRASH_HANDLER is defined,
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// register a handler for a stack trace when we crash.
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//
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// Currently this works on Linux and Mac and Windows, but on Linux, you will
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// get much better results than we can deliver by running "catchsegv <program>".
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void SetupCrashHandler();
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#endif//CrashHandler_DEFINED
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