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author | Argyrios Kyrtzidis <akyrtzi@gmail.com> | 2014-06-25 23:54:50 +0000 |
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committer | Argyrios Kyrtzidis <akyrtzi@gmail.com> | 2014-06-25 23:54:50 +0000 |
commit | ce6e7c7a59e8595ea3f30d87cbad4af278cb5ef3 (patch) | |
tree | 2a8c3b6028d94986af960d3e09d3848e15a4c3eb /lib/Support | |
parent | f36f20ae7a191f42a4ef63dd68a6a6545d02695b (diff) | |
download | llvm-ce6e7c7a59e8595ea3f30d87cbad4af278cb5ef3.tar.gz llvm-ce6e7c7a59e8595ea3f30d87cbad4af278cb5ef3.tar.bz2 llvm-ce6e7c7a59e8595ea3f30d87cbad4af278cb5ef3.tar.xz |
For CrashRecoveryContext::RunSafelyOnThread, propagate Darwin's PRIO_DARWIN_BG to the new thread if it is
set on the calling thread.
This allows libclang's indexing threads to propagate their priority to the clang module building threads.
rdar://17459872
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211747 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Support')
-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(); |