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Restore PrettyStackTrace state on crash. 

Last part of PR11974.

llvm-svn: 244339
This commit is contained in:
Nico Weber 2015-08-07 17:48:57 +00:00
parent af3f242016
commit 6362745a76
1 changed files with 17 additions and 0 deletions
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17
clang/lib/Parse/ParseAST.cpp
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@ -30,6 +30,21 @@ using namespace clang;
namespace {
/// Resets LLVM's pretty stack state so that stack traces are printed correctly
/// when there are nested CrashRecoveryContexts and the inner one recovers from
/// a crash.
class ResetStackCleanup
: public llvm::CrashRecoveryContextCleanupBase<ResetStackCleanup,
const void> {
public:
ResetStackCleanup(llvm::CrashRecoveryContext *Context, const void *Top)
: llvm::CrashRecoveryContextCleanupBase<ResetStackCleanup, const void>(
Context, Top) {}
void recoverResources() override {
llvm::RestorePrettyStackState(resource);
}
};
/// If a crash happens while the parser is active, an entry is printed for it.
class PrettyStackTraceParserEntry : public llvm::PrettyStackTraceEntry {
const Parser &P;
@ -113,6 +128,8 @@ void clang::ParseAST(Sema &S, bool PrintStats, bool SkipFunctionBodies) {
new Parser(S.getPreprocessor(), S, SkipFunctionBodies));
Parser &P = *ParseOP.get();
llvm::CrashRecoveryContextCleanupRegistrar<const void, ResetStackCleanup>
CleanupPrettyStack(llvm::SavePrettyStackState());
PrettyStackTraceParserEntry CrashInfo(P);
// Recover resources if we crash before exiting this method.