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move some code to gracefully handle the case when a handler crashes.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66171 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2009-03-05 18:22:14 +00:00
parent 5049600672
commit 0f6290d698
1 changed files with 6 additions and 4 deletions
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10
lib/System/Unix/Signals.inc
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@ -57,6 +57,12 @@ static const int *const KillSigsEnd =
// SignalHandler - The signal handler that runs... // SignalHandler - The signal handler that runs...
static RETSIGTYPE SignalHandler(int Sig) { static RETSIGTYPE SignalHandler(int Sig) {
// Restore the signal behavior to default, so that the program actually
// crashes when we return and the signal reissues. This also ensures that if
// we crash in our signal handler that the program will terminate immediately
// instead of recursing in the signal handler.
signal(Sig, SIG_DFL);
if (FilesToRemove != 0) if (FilesToRemove != 0)
while (!FilesToRemove->empty()) { while (!FilesToRemove->empty()) {
FilesToRemove->back().eraseFromDisk(true); FilesToRemove->back().eraseFromDisk(true);
@ -77,10 +83,6 @@ static RETSIGTYPE SignalHandler(int Sig) {
if (CallBacksToRun) if (CallBacksToRun)
for (unsigned i = 0, e = CallBacksToRun->size(); i != e; ++i) for (unsigned i = 0, e = CallBacksToRun->size(); i != e; ++i)
(*CallBacksToRun)[i].first((*CallBacksToRun)[i].second); (*CallBacksToRun)[i].first((*CallBacksToRun)[i].second);
// Restore the signal behavior to default, so that the program actually
// crashes when we return and the signal reissues.
signal(Sig, SIG_DFL);
} }
// Just call signal // Just call signal