diff options
Diffstat (limited to 'lib/Support/CrashRecoveryContext.cpp')
-rw-r--r-- | lib/Support/CrashRecoveryContext.cpp | 23 |
1 files changed, 21 insertions, 2 deletions
diff --git a/lib/Support/CrashRecoveryContext.cpp b/lib/Support/CrashRecoveryContext.cpp index 016c805cc7..9b0e44339d 100644 --- a/lib/Support/CrashRecoveryContext.cpp +++ b/lib/Support/CrashRecoveryContext.cpp @@ -332,12 +332,26 @@ const std::string &CrashRecoveryContext::getBacktrace() const { return CRC->Backtrace; } -// +// FIXME: Portability. +static void setThreadBackgroundPriority() { +#ifdef __APPLE__ + setpriority(PRIO_DARWIN_THREAD, 0, PRIO_DARWIN_BG); +#endif +} + +static bool hasThreadBackgroundPriority() { +#ifdef __APPLE__ + return getpriority(PRIO_DARWIN_THREAD, 0) == 1; +#else + return false; +#endif +} namespace { struct RunSafelyOnThreadInfo { function_ref<void()> Fn; CrashRecoveryContext *CRC; + bool UseBackgroundPriority; bool Result; }; } @@ -345,11 +359,16 @@ struct RunSafelyOnThreadInfo { static void RunSafelyOnThread_Dispatch(void *UserData) { RunSafelyOnThreadInfo *Info = reinterpret_cast<RunSafelyOnThreadInfo*>(UserData); + + if (Info->UseBackgroundPriority) + setThreadBackgroundPriority(); + Info->Result = Info->CRC->RunSafely(Info->Fn); } bool CrashRecoveryContext::RunSafelyOnThread(function_ref<void()> Fn, unsigned RequestedStackSize) { - RunSafelyOnThreadInfo Info = { Fn, this, false }; + bool UseBackgroundPriority = hasThreadBackgroundPriority(); + RunSafelyOnThreadInfo Info = { Fn, this, UseBackgroundPriority, false }; llvm_execute_on_thread(RunSafelyOnThread_Dispatch, &Info, RequestedStackSize); if (CrashRecoveryContextImpl *CRC = (CrashRecoveryContextImpl *)Impl) CRC->setSwitchedThread(); |