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[tsan] Extract sigaction_impl and signal_impl 

Preparation for switching to sanitizer_signal_interceptors.inc

Part of https://github.com/google/sanitizers/issues/637

llvm-svn: 317913
This commit is contained in:
Vitaly Buka 2017-11-10 19:22:51 +00:00
parent 014af0cbd4
commit 01a7e4ca6b
1 changed files with 13 additions and 0 deletions
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13
compiler-rt/lib/tsan/rtl/tsan_interceptors.cc
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@ -1950,8 +1950,17 @@ static void rtl_sigaction(int sig, __sanitizer_siginfo *info, void *ctx) {
rtl_generic_sighandler(true, sig, info, ctx);
}
static int sigaction_impl(int sig, __sanitizer_sigaction *act,
__sanitizer_sigaction *old);
static sighandler_t signal_impl(int sig, sighandler_t h);
TSAN_INTERCEPTOR(int, sigaction, int sig, __sanitizer_sigaction *act,
__sanitizer_sigaction *old) {
return sigaction_impl(sig, act, old);
}
int sigaction_impl(int sig, __sanitizer_sigaction *act,
__sanitizer_sigaction *old) {
// Note: if we call REAL(sigaction) directly for any reason without proxying
// the signal handler through rtl_sigaction, very bad things will happen.
// The handler will run synchronously and corrupt tsan per-thread state.
@ -1989,6 +1998,10 @@ TSAN_INTERCEPTOR(int, sigaction, int sig, __sanitizer_sigaction *act,
}
TSAN_INTERCEPTOR(sighandler_t, signal, int sig, sighandler_t h) {
return signal_impl(sig, h);
}
static sighandler_t signal_impl(int sig, sighandler_t h) {
__sanitizer_sigaction act;
act.handler = h;
internal_memset(&act.sa_mask, -1, sizeof(act.sa_mask));