svn commit: r338382 - in vendor/compiler-rt/dist-release_70: lib/lsan test/lsan/TestCases/Linux

[Dimitry Andric]

Author: dim
Date: Wed Aug 29 17:50:55 2018
New Revision: 338382
URL: https://svnweb.freebsd.org/changeset/base/338382

Log:
  Vendor import of compiler-rt release_70 branch r340910:
  https://llvm.org/svn/llvm-project/compiler-rt/branches/release_70@340910

Added:
  vendor/compiler-rt/dist-release_70/test/lsan/TestCases/Linux/fork_and_leak.cc   (contents, props changed)
Deleted:
  vendor/compiler-rt/dist-release_70/test/lsan/TestCases/Linux/fork_with_threads.cc
Modified:
  vendor/compiler-rt/dist-release_70/lib/lsan/lsan_common.cc

Modified: vendor/compiler-rt/dist-release_70/lib/lsan/lsan_common.cc
==============================================================================
--- vendor/compiler-rt/dist-release_70/lib/lsan/lsan_common.cc	Wed Aug 29 17:50:52 2018	(r338381)
+++ vendor/compiler-rt/dist-release_70/lib/lsan/lsan_common.cc	Wed Aug 29 17:50:55 2018	(r338382)
@@ -100,8 +100,6 @@ static SuppressionContext *GetSuppressionContext() {
 
 static InternalMmapVector<RootRegion> *root_regions;
 
-static uptr initialized_for_pid;
-
 InternalMmapVector<RootRegion> const *GetRootRegions() { return root_regions; }
 
 void InitializeRootRegions() {
@@ -115,7 +113,6 @@ const char *MaybeCallLsanDefaultOptions() {
 }
 
 void InitCommonLsan() {
-  initialized_for_pid = internal_getpid();
   InitializeRootRegions();
   if (common_flags()->detect_leaks) {
     // Initialization which can fail or print warnings should only be done if
@@ -571,12 +568,6 @@ static void CheckForLeaksCallback(const SuspendedThrea
 static bool CheckForLeaks() {
   if (&__lsan_is_turned_off && __lsan_is_turned_off())
       return false;
-  if (initialized_for_pid != internal_getpid()) {
-    // If process was forked and it had threads we fail to detect references
-    // from other threads.
-    Report("WARNING: LeakSanitizer is disabled in forked process.\n");
-    return false;
-  }
   EnsureMainThreadIDIsCorrect();
   CheckForLeaksParam param;
   param.success = false;

Added: vendor/compiler-rt/dist-release_70/test/lsan/TestCases/Linux/fork_and_leak.cc
==============================================================================
--- /dev/null	00:00:00 1970	(empty, because file is newly added)
+++ vendor/compiler-rt/dist-release_70/test/lsan/TestCases/Linux/fork_and_leak.cc	Wed Aug 29 17:50:55 2018	(r338382)
@@ -0,0 +1,23 @@
+// Test that leaks detected after forking without exec().
+// RUN: %clangxx_lsan %s -o %t && not %run %t 2>&1 | FileCheck %s
+
+#include <assert.h>
+#include <stdlib.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+int main() {
+  pid_t pid = fork();
+  assert(pid >= 0);
+  if (pid > 0) {
+    int status = 0;
+    waitpid(pid, &status, 0);
+    assert(WIFEXITED(status));
+    return WEXITSTATUS(status);
+  } else {
+    malloc(1337);
+    // CHECK: LeakSanitizer: detected memory leaks
+  }
+  return 0;
+}
+