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[Sanitizers] PGO implements enable/disable SIGKILL on callers on FreeBSD.

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Reviewed By: phosek

Differential Revision: https://reviews.llvm.org/D108867
This commit is contained in:
David Carlier
2021-08-28 22:53:16 +01:00
parent 510e106fa8
commit b35e636e40
1 changed files with 13 additions and 0 deletions
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13
compiler-rt/lib/profile/InstrProfilingUtil.c
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@@ -38,6 +38,11 @@
#include <zircon/syscalls.h>
#endif
#if defined(__FreeBSD__)
#include <signal.h>
#include <sys/procctl.h>
#endif
#include "InstrProfiling.h"
#include "InstrProfilingUtil.h"
@@ -326,6 +331,11 @@ COMPILER_RT_VISIBILITY int lprofSuspendSigKill() {
if (prctl(PR_GET_PDEATHSIG, &PDeachSig) == 0 && PDeachSig == SIGKILL)
prctl(PR_SET_PDEATHSIG, 0);
return (PDeachSig == SIGKILL);
#elif defined(__FreeBSD__)
int PDeachSig = 0, PDisableSig = 0;
if (procctl(P_PID, 0, PROC_PDEATHSIG_STATUS, &PDeachSig) == 0 &&
PDeachSig == SIGKILL)
procctl(P_PID, 0, PROC_PDEATHSIG_CTL, &PDisableSig);
#else
return 0;
#endif
@@ -334,6 +344,9 @@ COMPILER_RT_VISIBILITY int lprofSuspendSigKill() {
COMPILER_RT_VISIBILITY void lprofRestoreSigKill() {
#if defined(__linux__)
prctl(PR_SET_PDEATHSIG, SIGKILL);
#elif defined(__FreeBSD__)
int PEnableSig = SIGKILL;
procctl(P_PID, 0, PROC_PDEATHSIG_CTL, &PEnableSig);
#endif
}