1 files changed, 35 insertions, 0 deletions
diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_linux_libcdep.cc b/compiler-rt/lib/sanitizer_common/sanitizer_linux_libcdep.cc
index 7859557c82d..84da23e3fad 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_linux_libcdep.cc
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_linux_libcdep.cc
@@ -23,6 +23,7 @@
 #include "sanitizer_file.h"
 #include "sanitizer_flags.h"
 #include "sanitizer_freebsd.h"
+#include "sanitizer_getauxval.h"
 #include "sanitizer_linux.h"
 #include "sanitizer_placement_new.h"
 #include "sanitizer_procmaps.h"
@@ -806,6 +807,40 @@ u64 MonotonicNanoTime() {
 }
 #endif  // SANITIZER_LINUX && !SANITIZER_GO
 
+#if !SANITIZER_OPENBSD
+void ReExec() {
+  const char *pathname = "/proc/self/exe";
+
+#if SANITIZER_NETBSD
+  static const int name[] = {
+      CTL_KERN,
+      KERN_PROC_ARGS,
+      -1,
+      KERN_PROC_PATHNAME,
+  };
+  char path[400];
+  uptr len;
+
+  len = sizeof(path);
+  if (internal_sysctl(name, ARRAY_SIZE(name), path, &len, NULL, 0) != -1)
+    pathname = path;
+#elif SANITIZER_SOLARIS
+  pathname = getexecname();
+  CHECK_NE(pathname, NULL);
+#elif SANITIZER_USE_GETAUXVAL
+  // Calling execve with /proc/self/exe sets that as $EXEC_ORIGIN. Binaries that
+  // rely on that will fail to load shared libraries. Query AT_EXECFN instead.
+  pathname = reinterpret_cast<const char *>(getauxval(AT_EXECFN));
+#endif
+
+  uptr rv = internal_execve(pathname, GetArgv(), GetEnviron());
+  int rverrno;
+  CHECK_EQ(internal_iserror(rv, &rverrno), true);
+  Printf("execve failed, errno %d\n", rverrno);
+  Die();
+}
+#endif  // !SANITIZER_OPENBSD
+
 } // namespace __sanitizer
 
 #endif