vendor/compiler-rt/compiler-rt-trunk-r300422

1 files changed, 23 insertions, 0 deletions

diff --git a/lib/profile/InstrProfilingUtil.c b/lib/profile/InstrProfilingUtil.c
index 321c7192cc60f..fb68f30a5e1fe 100644
--- a/lib/profile/InstrProfilingUtil.c
+++ b/lib/profile/InstrProfilingUtil.c
@@ -29,6 +29,11 @@
 #include <stdlib.h>
 #include <string.h>
 
+#if defined(__linux__)
+#include <signal.h>
+#include <sys/prctl.h>
+#endif
+
 COMPILER_RT_VISIBILITY
 void __llvm_profile_recursive_mkdir(char *path) {
   int i;
@@ -219,3 +224,21 @@ COMPILER_RT_VISIBILITY const char *lprofFindLastDirSeparator(const char *Path) {
 #endif
   return Sep;
 }
+
+COMPILER_RT_VISIBILITY int lprofSuspendSigKill() {
+#if defined(__linux__)
+  int PDeachSig = 0;
+  /* Temporarily suspend getting SIGKILL upon exit of the parent process. */
+  if (prctl(PR_GET_PDEATHSIG, &PDeachSig) == 0 && PDeachSig == SIGKILL)
+    prctl(PR_SET_PDEATHSIG, 0);
+  return (PDeachSig == SIGKILL);
+#else
+  return 0;
+#endif
+}
+
+COMPILER_RT_VISIBILITY void lprofRestoreSigKill() {
+#if defined(__linux__)
+  prctl(PR_SET_PDEATHSIG, SIGKILL);
+#endif
+}