diff options
Diffstat (limited to 'base/message_loop.cc')
| -rw-r--r-- | base/message_loop.cc | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/base/message_loop.cc b/base/message_loop.cc index 059cdc25..e6b49ac8 100644 --- a/base/message_loop.cc +++ b/base/message_loop.cc @@ -8,6 +8,7 @@ #include "base/bind.h" #include "base/compiler_specific.h" +#include "base/debug/alias.h" #include "base/lazy_instance.h" #include "base/logging.h" #include "base/message_pump_default.h" @@ -467,6 +468,14 @@ void MessageLoop::RunTask(const PendingTask& pending_task) { // Execute the task and assume the worst: It is probably not reentrant. nestable_tasks_allowed_ = false; + // Before running the task, store the program counter where it was posted + // and deliberately alias it to ensure it is on the stack if the task + // crashes. Be careful not to assume that the variable itself will have the + // expected value when displayed by the optimizer in an optimized build. + // Look at a memory dump of the stack. + const void* program_counter = pending_task.birth_program_counter; + base::debug::Alias(&program_counter); + HistogramEvent(kTaskRunEvent); FOR_EACH_OBSERVER(TaskObserver, task_observers_, WillProcessTask(pending_task.time_posted)); @@ -766,7 +775,8 @@ MessageLoop::PendingTask::PendingTask( time_posted(TimeTicks::Now()), delayed_run_time(delayed_run_time), sequence_num(0), - nestable(nestable) { + nestable(nestable), + birth_program_counter(posted_from.program_counter()) { #if defined(TRACK_ALL_TASK_OBJECTS) if (tracked_objects::ThreadData::IsActive()) { tracked_objects::ThreadData* current_thread_data = |