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| author | Richard Smith <richard-llvm@metafoo.co.uk> | 2016-05-20 21:26:00 +0000 |
|---|---|---|
| committer | Richard Smith <richard-llvm@metafoo.co.uk> | 2016-05-20 21:26:00 +0000 |
| commit | abab5d236dc453f7804dc00155c611da860274d5 (patch) | |
| tree | 03dca309de68f10f3bcc72ed0ee55d831fcc9da7 /llvm/lib/Support/Unix | |
| parent | ebed1fe0de88ef664f9f51d079f5b22eb7f996fe (diff) | |
| download | bcm5719-llvm-abab5d236dc453f7804dc00155c611da860274d5.tar.gz bcm5719-llvm-abab5d236dc453f7804dc00155c611da860274d5.zip | |
Add a configure-time check for the existence of sigaltstack. It seems that some
systems provide a <signal.h> that doesn't declare it.
llvm-svn: 270278
Diffstat (limited to 'llvm/lib/Support/Unix')
| -rw-r--r-- | llvm/lib/Support/Unix/Signals.inc | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/llvm/lib/Support/Unix/Signals.inc b/llvm/lib/Support/Unix/Signals.inc index cf621c0cf76..5d4a07a0a52 100644 --- a/llvm/lib/Support/Unix/Signals.inc +++ b/llvm/lib/Support/Unix/Signals.inc @@ -28,8 +28,6 @@ # include <execinfo.h> // For backtrace(). #endif #if HAVE_SIGNAL_H -// FIXME: We unconditionally use symbols from this header below. Do we really -// need a configure-time check for a POSIX-mandated header in lib/Support/Unix? #include <signal.h> #endif #if HAVE_SYS_STAT_H @@ -119,6 +117,7 @@ static void RegisterHandler(int Signal) { ++NumRegisteredSignals; } +#if defined(HAVE_SIGALTSTACK) // Hold onto the old alternate signal stack so that it's not reported as a leak. // We don't make any attempt to remove our alt signal stack if we remove our // signal handlers; that can't be done reliably if someone else is also trying @@ -143,6 +142,9 @@ static void CreateSigAltStack() { if (sigaltstack(&AltStack, &OldAltStack) != 0) free(AltStack.ss_sp); } +#else +static void CreateSigAltStack() {} +#endif static void RegisterHandlers() { // We need to dereference the signals mutex during handler registration so |
