[src/trunk]: src/external/gpl3/gcc/dist/libsanitizer Add __lsan::ScopedInterc...

[kamil <kamil%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/a09d11dcd425
branches:  trunk
changeset: 954776:a09d11dcd425
user:      kamil <kamil%NetBSD.org@localhost>
date:      Fri Sep 11 01:03:31 2020 +0000

description:
Add __lsan::ScopedInterceptorDisabler for strerror(3)

Cherry-pick and adapt:

commit 1b58389428ed07a7322ba9c2bcaeec99807f9457
Author: Kamil Rytarowski <n54%gmx.com@localhost>
Date:   Sat Sep 21 07:45:02 2019 +0000

    Add __lsan::ScopedInterceptorDisabler for strerror(3)

    Summary:
    strerror(3) on NetBSD uses internally TSD with a destructor that is never
    fired for exit(3). It's correctly called for pthread_exit(3) scenarios.

    This is a case when a leak on exit(3) is expected, unavoidable and harmless.

    Reviewers: joerg, vitalybuka, dvyukov, mgorny

    Reviewed By: vitalybuka

    Subscribers: dmgreen, kristof.beyls, jfb, llvm-commits, #sanitizers

    Tags: #sanitizers, #llvm

    Differential Revision: https://reviews.llvm.org/D67337

    llvm-svn: 372461

diffstat:

 external/gpl3/gcc/dist/libsanitizer/asan/asan_interceptors.cc                          |   5 ++++
 external/gpl3/gcc/dist/libsanitizer/lsan/lsan_interceptors.cc                          |  12 ++++++++++
 external/gpl3/gcc/dist/libsanitizer/sanitizer_common/sanitizer_common_interceptors.inc |   6 +++++
 3 files changed, 23 insertions(+), 0 deletions(-)

diffs (74 lines):

diff -r 3047d27f4846 -r a09d11dcd425 external/gpl3/gcc/dist/libsanitizer/asan/asan_interceptors.cc
--- a/external/gpl3/gcc/dist/libsanitizer/asan/asan_interceptors.cc     Fri Sep 11 01:01:14 2020 +0000
+++ b/external/gpl3/gcc/dist/libsanitizer/asan/asan_interceptors.cc     Fri Sep 11 01:03:31 2020 +0000
@@ -163,6 +163,11 @@
     ASAN_MEMSET_IMPL(ctx, block, c, size);                  \
   } while (false)
 
+#if CAN_SANITIZE_LEAKS
+#define COMMON_INTERCEPTOR_STRERROR()                       \
+  __lsan::ScopedInterceptorDisabler disabler
+#endif
+
 #include "sanitizer_common/sanitizer_common_interceptors.inc"
 #include "sanitizer_common/sanitizer_signal_interceptors.inc"
 
diff -r 3047d27f4846 -r a09d11dcd425 external/gpl3/gcc/dist/libsanitizer/lsan/lsan_interceptors.cc
--- a/external/gpl3/gcc/dist/libsanitizer/lsan/lsan_interceptors.cc     Fri Sep 11 01:01:14 2020 +0000
+++ b/external/gpl3/gcc/dist/libsanitizer/lsan/lsan_interceptors.cc     Fri Sep 11 01:03:31 2020 +0000
@@ -338,6 +338,16 @@
 #define LSAN_MAYBE_INTERCEPT_THR_EXIT
 #endif
 
+#if SANITIZER_INTERCEPT_STRERROR
+INTERCEPTOR(char *, strerror, int errnum) {
+  __lsan::ScopedInterceptorDisabler disabler;
+  return REAL(strerror)(errnum);
+}
+#define LSAN_MAYBE_INTERCEPT_STRERROR INTERCEPT_FUNCTION(strerror)
+#else
+#define LSAN_MAYBE_INTERCEPT_STRERROR
+#endif
+
 struct ThreadParam {
   void *(*callback)(void *arg);
   void *param;
@@ -447,6 +457,8 @@
   LSAN_MAYBE_INTERCEPT__LWP_EXIT;
   LSAN_MAYBE_INTERCEPT_THR_EXIT;
 
+  LSAN_MAYBE_INTERCEPT_STRERROR;
+
 #if !SANITIZER_NETBSD && !SANITIZER_FREEBSD
   if (pthread_key_create(&g_thread_finalize_key, &thread_finalize)) {
     Report("LeakSanitizer: failed to create thread key.\n");
diff -r 3047d27f4846 -r a09d11dcd425 external/gpl3/gcc/dist/libsanitizer/sanitizer_common/sanitizer_common_interceptors.inc
--- a/external/gpl3/gcc/dist/libsanitizer/sanitizer_common/sanitizer_common_interceptors.inc    Fri Sep 11 01:01:14 2020 +0000
+++ b/external/gpl3/gcc/dist/libsanitizer/sanitizer_common/sanitizer_common_interceptors.inc    Fri Sep 11 01:03:31 2020 +0000
@@ -35,6 +35,7 @@
 //   COMMON_INTERCEPTOR_MMAP_IMPL
 //   COMMON_INTERCEPTOR_COPY_STRING
 //   COMMON_INTERCEPTOR_STRNDUP_IMPL
+//   COMMON_INTERCEPTOR_STRERROR
 //===----------------------------------------------------------------------===//
 
 #include "interception/interception.h"
@@ -290,6 +291,10 @@
   return new_mem;
 #endif
 
+#ifndef COMMON_INTERCEPTOR_STRERROR
+#define COMMON_INTERCEPTOR_STRERROR() {}
+#endif
+
 struct FileMetadata {
   // For open_memstream().
   char **addr;
@@ -3631,6 +3636,7 @@
 INTERCEPTOR(char *, strerror, int errnum) {
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, strerror, errnum);
+  COMMON_INTERCEPTOR_STRERROR();
   char *res = REAL(strerror)(errnum);
   if (res) COMMON_INTERCEPTOR_INITIALIZE_RANGE(res, REAL(strlen)(res) + 1);
   return res;