diff options
Diffstat (limited to 'llvm/lib/Support/PrettyStackTrace.cpp')
| -rw-r--r-- | llvm/lib/Support/PrettyStackTrace.cpp | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/llvm/lib/Support/PrettyStackTrace.cpp b/llvm/lib/Support/PrettyStackTrace.cpp index bf7b150b842..3f3b9d4d45f 100644 --- a/llvm/lib/Support/PrettyStackTrace.cpp +++ b/llvm/lib/Support/PrettyStackTrace.cpp @@ -27,6 +27,11 @@ using namespace llvm; +// If backtrace support is not enabled, compile out support for pretty stack +// traces. This has the secondary effect of not requiring thread local storage +// when backtrace support is disabled. +#if ENABLE_BACKTRACE + // We need a thread local pointer to manage the stack of our stack trace // objects, but we *really* cannot tolerate destructors running and do not want // to pay any overhead of synchronizing. As a consequence, we use a raw @@ -103,16 +108,23 @@ static void CrashHandler(void *) { #endif } +// ENABLE_BACKTRACE +#endif + PrettyStackTraceEntry::PrettyStackTraceEntry() { +#if ENABLE_BACKTRACE // Link ourselves. NextEntry = PrettyStackTraceHead; PrettyStackTraceHead = this; +#endif } PrettyStackTraceEntry::~PrettyStackTraceEntry() { +#if ENABLE_BACKTRACE assert(PrettyStackTraceHead == this && "Pretty stack trace entry destruction is out of order"); PrettyStackTraceHead = getNextEntry(); +#endif } void PrettyStackTraceString::print(raw_ostream &OS) const { @@ -127,15 +139,19 @@ void PrettyStackTraceProgram::print(raw_ostream &OS) const { OS << '\n'; } +#if ENABLE_BACKTRACE static bool RegisterCrashPrinter() { sys::AddSignalHandler(CrashHandler, nullptr); return false; } +#endif void llvm::EnablePrettyStackTrace() { +#if ENABLE_BACKTRACE // The first time this is called, we register the crash printer. static bool HandlerRegistered = RegisterCrashPrinter(); (void)HandlerRegistered; +#endif } void LLVMEnablePrettyStackTrace() { |
