Swiftdiff options
Diffstat (limited to '3rdParty/Breakpad/src/client/mac/handler/exception_handler.cc')
| -rw-r--r-- | 3rdParty/Breakpad/src/client/mac/handler/exception_handler.cc | 170 |
1 files changed, 100 insertions, 70 deletions
diff --git a/3rdParty/Breakpad/src/client/mac/handler/exception_handler.cc b/3rdParty/Breakpad/src/client/mac/handler/exception_handler.cc index 4043019..2a19d46 100644 --- a/3rdParty/Breakpad/src/client/mac/handler/exception_handler.cc +++ b/3rdParty/Breakpad/src/client/mac/handler/exception_handler.cc @@ -27,19 +27,32 @@ // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. -#include <map> #include <mach/exc.h> #include <mach/mig.h> #include <pthread.h> #include <signal.h> #include <TargetConditionals.h> +#include <map> + #include "client/mac/handler/exception_handler.h" #include "client/mac/handler/minidump_generator.h" #include "common/mac/macho_utilities.h" #include "common/mac/scoped_task_suspend-inl.h" #include "google_breakpad/common/minidump_exception_mac.h" +#ifndef __EXCEPTIONS +// This file uses C++ try/catch (but shouldn't). Duplicate the macros from +// <c++/4.2.1/exception_defines.h> allowing this file to work properly with +// exceptions disabled even when other C++ libraries are used. #undef the try +// and catch macros first in case libstdc++ is in use and has already provided +// its own definitions. +#undef try +#define try if (true) +#undef catch +#define catch(X) if (false) +#endif // __EXCEPTIONS + #ifndef USE_PROTECTED_ALLOCATIONS #if TARGET_OS_IPHONE #define USE_PROTECTED_ALLOCATIONS 1 @@ -61,8 +74,12 @@ namespace google_breakpad { static union { #if USE_PROTECTED_ALLOCATIONS +#if defined PAGE_MAX_SIZE + char protected_buffer[PAGE_MAX_SIZE] __attribute__((aligned(PAGE_MAX_SIZE))); +#else char protected_buffer[PAGE_SIZE] __attribute__((aligned(PAGE_SIZE))); -#endif +#endif // defined PAGE_MAX_SIZE +#endif // USE_PROTECTED_ALLOCATIONS google_breakpad::ExceptionHandler *handler; } gProtectedData; @@ -103,14 +120,13 @@ exception_mask_t s_exception_mask = EXC_MASK_BAD_ACCESS | EXC_MASK_BAD_INSTRUCTION | EXC_MASK_ARITHMETIC | EXC_MASK_BREAKPOINT; #if !TARGET_OS_IPHONE -extern "C" -{ +extern "C" { // Forward declarations for functions that need "C" style compilation - boolean_t exc_server(mach_msg_header_t *request, - mach_msg_header_t *reply); + boolean_t exc_server(mach_msg_header_t* request, + mach_msg_header_t* reply); // This symbol must be visible to dlsym() - see - // http://code.google.com/p/google-breakpad/issues/detail?id=345 for details. + // https://bugs.chromium.org/p/google-breakpad/issues/detail?id=345 for details. kern_return_t catch_exception_raise(mach_port_t target_port, mach_port_t failed_thread, mach_port_t task, @@ -129,19 +145,19 @@ kern_return_t ForwardException(mach_port_t task, #if TARGET_OS_IPHONE // Implementation is based on the implementation generated by mig. -boolean_t breakpad_exc_server(mach_msg_header_t *InHeadP, - mach_msg_header_t *OutHeadP) { - OutHeadP->msgh_bits = - MACH_MSGH_BITS(MACH_MSGH_BITS_REMOTE(InHeadP->msgh_bits), 0); - OutHeadP->msgh_remote_port = InHeadP->msgh_remote_port; - /* Minimal size: routine() will update it if different */ - OutHeadP->msgh_size = (mach_msg_size_t)sizeof(mig_reply_error_t); - OutHeadP->msgh_local_port = MACH_PORT_NULL; - OutHeadP->msgh_id = InHeadP->msgh_id + 100; +boolean_t breakpad_exc_server(mach_msg_header_t* InHeadP, + mach_msg_header_t* OutHeadP) { + OutHeadP->msgh_bits = + MACH_MSGH_BITS(MACH_MSGH_BITS_REMOTE(InHeadP->msgh_bits), 0); + OutHeadP->msgh_remote_port = InHeadP->msgh_remote_port; + /* Minimal size: routine() will update it if different */ + OutHeadP->msgh_size = (mach_msg_size_t)sizeof(mig_reply_error_t); + OutHeadP->msgh_local_port = MACH_PORT_NULL; + OutHeadP->msgh_id = InHeadP->msgh_id + 100; if (InHeadP->msgh_id != 2401) { - ((mig_reply_error_t *)OutHeadP)->NDR = NDR_record; - ((mig_reply_error_t *)OutHeadP)->RetCode = MIG_BAD_ID; + ((mig_reply_error_t*)OutHeadP)->NDR = NDR_record; + ((mig_reply_error_t*)OutHeadP)->RetCode = MIG_BAD_ID; return FALSE; } @@ -171,8 +187,8 @@ boolean_t breakpad_exc_server(mach_msg_header_t *InHeadP, #pragma pack() #endif - Request *In0P = (Request *)InHeadP; - Reply *OutP = (Reply *)OutHeadP; + Request* In0P = (Request*)InHeadP; + Reply* OutP = (Reply*)OutHeadP; if (In0P->task.name != mach_task_self()) { return FALSE; @@ -186,8 +202,8 @@ boolean_t breakpad_exc_server(mach_msg_header_t *InHeadP, return TRUE; } #else -boolean_t breakpad_exc_server(mach_msg_header_t *request, - mach_msg_header_t *reply) { +boolean_t breakpad_exc_server(mach_msg_header_t* request, + mach_msg_header_t* reply) { return exc_server(request, reply); } @@ -207,9 +223,9 @@ kern_return_t catch_exception_raise(mach_port_t port, mach_port_t failed_thread, ExceptionHandler::ExceptionHandler(const string &dump_path, FilterCallback filter, MinidumpCallback callback, - void *callback_context, + void* callback_context, bool install_handler, - const char *port_name) + const char* port_name) : dump_path_(), filter_(filter), callback_(callback), @@ -235,7 +251,7 @@ ExceptionHandler::ExceptionHandler(const string &dump_path, // special constructor if we want to bypass minidump writing and // simply get a callback with the exception information ExceptionHandler::ExceptionHandler(DirectCallback callback, - void *callback_context, + void* callback_context, bool install_handler) : dump_path_(), filter_(NULL), @@ -269,9 +285,13 @@ bool ExceptionHandler::WriteMinidump(bool write_exception_stream) { if (pthread_mutex_lock(&minidump_write_mutex_) == 0) { // Send an empty message to the handle port so that a minidump will // be written - SendMessageToHandlerThread(write_exception_stream ? - kWriteDumpWithExceptionMessage : - kWriteDumpMessage); + bool result = SendMessageToHandlerThread(write_exception_stream ? + kWriteDumpWithExceptionMessage : + kWriteDumpMessage); + if (!result) { + pthread_mutex_unlock(&minidump_write_mutex_); + return false; + } // Wait for the minidump writer to complete its writing. It will unlock // the mutex when completed @@ -287,18 +307,18 @@ bool ExceptionHandler::WriteMinidump(bool write_exception_stream) { bool ExceptionHandler::WriteMinidump(const string &dump_path, bool write_exception_stream, MinidumpCallback callback, - void *callback_context) { + void* callback_context) { ExceptionHandler handler(dump_path, NULL, callback, callback_context, false, - NULL); + NULL); return handler.WriteMinidump(write_exception_stream); } // static bool ExceptionHandler::WriteMinidumpForChild(mach_port_t child, - mach_port_t child_blamed_thread, - const string &dump_path, - MinidumpCallback callback, - void *callback_context) { + mach_port_t child_blamed_thread, + const string &dump_path, + MinidumpCallback callback, + void* callback_context) { ScopedTaskSuspend suspend(child); MinidumpGenerator generator(child, MACH_PORT_NULL); @@ -306,34 +326,41 @@ bool ExceptionHandler::WriteMinidumpForChild(mach_port_t child, string dump_filename = generator.UniqueNameInDirectory(dump_path, &dump_id); generator.SetExceptionInformation(EXC_BREAKPOINT, -#if defined (__i386__) || defined(__x86_64__) - EXC_I386_BPT, -#elif defined (__ppc__) || defined (__ppc64__) - EXC_PPC_BREAKPOINT, -#elif defined (__arm__) - EXC_ARM_BREAKPOINT, +#if defined(__i386__) || defined(__x86_64__) + EXC_I386_BPT, +#elif defined(__ppc__) || defined(__ppc64__) + EXC_PPC_BREAKPOINT, +#elif defined(__arm__) || defined(__aarch64__) + EXC_ARM_BREAKPOINT, #else #error architecture not supported #endif - 0, - child_blamed_thread); + 0, + child_blamed_thread); bool result = generator.Write(dump_filename.c_str()); if (callback) { return callback(dump_path.c_str(), dump_id.c_str(), - callback_context, result); + callback_context, result); } return result; } -bool ExceptionHandler::WriteMinidumpWithException(int exception_type, - int exception_code, - int exception_subcode, - mach_port_t thread_name, - bool exit_after_write, - bool report_current_thread) { +bool ExceptionHandler::WriteMinidumpWithException( + int exception_type, + int exception_code, + int exception_subcode, + breakpad_ucontext_t* task_context, + mach_port_t thread_name, + bool exit_after_write, + bool report_current_thread) { bool result = false; +#if TARGET_OS_IPHONE + // _exit() should never be called on iOS. + exit_after_write = false; +#endif + if (directCallback_) { if (directCallback_(callback_context_, exception_type, @@ -349,12 +376,15 @@ bool ExceptionHandler::WriteMinidumpWithException(int exception_type, // If this is a real exception, give the filter (if any) a chance to // decide if this should be sent. if (filter_ && !filter_(callback_context_)) - return false; - return crash_generation_client_->RequestDumpForException( - exception_type, - exception_code, - exception_subcode, - thread_name); + return false; + result = crash_generation_client_->RequestDumpForException( + exception_type, + exception_code, + exception_subcode, + thread_name); + if (result && exit_after_write) { + _exit(exception_type); + } } #endif } else { @@ -366,6 +396,7 @@ bool ExceptionHandler::WriteMinidumpWithException(int exception_type, MinidumpGenerator md(mach_task_self(), report_current_thread ? MACH_PORT_NULL : mach_thread_self()); + md.SetTaskContext(task_context); if (exception_type && exception_code) { // If this is a real exception, give the filter (if any) a chance to // decide if this should be sent. @@ -432,12 +463,13 @@ kern_return_t ForwardException(mach_port_t task, mach_port_t failed_thread, exception_behavior_t target_behavior = current.behaviors[found]; kern_return_t result; + // TODO: Handle the case where |target_behavior| has MACH_EXCEPTION_CODES + // set. https://bugs.chromium.org/p/google-breakpad/issues/detail?id=551 switch (target_behavior) { case EXCEPTION_DEFAULT: result = exception_raise(target_port, failed_thread, task, exception, code, code_count); break; - default: fprintf(stderr, "** Unknown exception behavior: %d\n", target_behavior); result = KERN_FAILURE; @@ -448,9 +480,9 @@ kern_return_t ForwardException(mach_port_t task, mach_port_t failed_thread, } // static -void *ExceptionHandler::WaitForMessage(void *exception_handler_class) { - ExceptionHandler *self = - reinterpret_cast<ExceptionHandler *>(exception_handler_class); +void* ExceptionHandler::WaitForMessage(void* exception_handler_class) { + ExceptionHandler* self = + reinterpret_cast<ExceptionHandler*>(exception_handler_class); ExceptionMessage receive; // Wait for the exception info @@ -495,11 +527,11 @@ void *ExceptionHandler::WaitForMessage(void *exception_handler_class) { if (receive.header.msgh_id == kWriteDumpWithExceptionMessage) { thread = receive.thread.name; exception_type = EXC_BREAKPOINT; -#if defined (__i386__) || defined(__x86_64__) +#if defined(__i386__) || defined(__x86_64__) exception_code = EXC_I386_BPT; -#elif defined (__ppc__) || defined (__ppc64__) +#elif defined(__ppc__) || defined(__ppc64__) exception_code = EXC_PPC_BREAKPOINT; -#elif defined (__arm__) +#elif defined(__arm__) || defined(__aarch64__) exception_code = EXC_ARM_BREAKPOINT; #else #error architecture not supported @@ -509,7 +541,7 @@ void *ExceptionHandler::WaitForMessage(void *exception_handler_class) { // Write out the dump and save the result for later retrieval self->last_minidump_write_result_ = self->WriteMinidumpWithException(exception_type, exception_code, - 0, thread, + 0, NULL, thread, false, false); #if USE_PROTECTED_ALLOCATIONS @@ -544,8 +576,8 @@ void *ExceptionHandler::WaitForMessage(void *exception_handler_class) { // Generate the minidump with the exception data. self->WriteMinidumpWithException(receive.exception, receive.code[0], - subcode, receive.thread.name, true, - false); + subcode, NULL, receive.thread.name, + true, false); #if USE_PROTECTED_ALLOCATIONS // This may have become protected again within @@ -580,7 +612,7 @@ void *ExceptionHandler::WaitForMessage(void *exception_handler_class) { return NULL; } -//static +// static void ExceptionHandler::SignalHandler(int sig, siginfo_t* info, void* uc) { #if USE_PROTECTED_ALLOCATIONS if (gBreakpadAllocator) @@ -590,6 +622,7 @@ void ExceptionHandler::SignalHandler(int sig, siginfo_t* info, void* uc) { EXC_SOFTWARE, MD_EXCEPTION_CODE_MAC_ABORT, 0, + static_cast<breakpad_ucontext_t*>(uc), mach_thread_self(), true, true); @@ -604,7 +637,6 @@ bool ExceptionHandler::InstallHandler() { if (gProtectedData.handler != NULL) { return false; } -#if TARGET_OS_IPHONE if (!IsOutOfProcess()) { struct sigaction sa; memset(&sa, 0, sizeof(sa)); @@ -624,7 +656,6 @@ bool ExceptionHandler::InstallHandler() { mprotect(gProtectedData.protected_buffer, PAGE_SIZE, PROT_READ); #endif } -#endif try { #if USE_PROTECTED_ALLOCATIONS @@ -633,7 +664,6 @@ bool ExceptionHandler::InstallHandler() { #else previous_ = new ExceptionParameters(); #endif - } catch (std::bad_alloc) { return false; @@ -732,7 +762,7 @@ bool ExceptionHandler::Setup(bool install_handler) { result = thread_create_result ? KERN_FAILURE : KERN_SUCCESS; } - return result == KERN_SUCCESS ? true : false; + return result == KERN_SUCCESS; } bool ExceptionHandler::Teardown() { |