From 2ec5c69b6872b8b474f3d37b9125d3d57d144d1b Mon Sep 17 00:00:00 2001
From: Florian Mayer <fmayer@google.com>
Date: Fri, 25 Oct 2024 09:42:01 -0700
Subject: [PATCH] Revert "[Sanitizers] Intercept timer_create" (#113710)

Reverts llvm/llvm-project#112285
---
 .../lib/hwasan/hwasan_platform_interceptors.h |  3 ---
 compiler-rt/lib/msan/tests/msan_test.cpp      | 23 -------------------
 .../sanitizer_common_interceptors.inc         | 19 ---------------
 .../sanitizer_platform_interceptors.h         |  3 ---
 .../sanitizer_platform_limits_posix.h         |  4 ----
 5 files changed, 52 deletions(-)

diff --git a/compiler-rt/lib/hwasan/hwasan_platform_interceptors.h b/compiler-rt/lib/hwasan/hwasan_platform_interceptors.h
index e8011014c2331d..d92b5105219427 100644
--- a/compiler-rt/lib/hwasan/hwasan_platform_interceptors.h
+++ b/compiler-rt/lib/hwasan/hwasan_platform_interceptors.h
@@ -200,9 +200,6 @@
 #undef SANITIZER_INTERCEPT_CLOCK_GETCPUCLOCKID
 #define SANITIZER_INTERCEPT_CLOCK_GETCPUCLOCKID 0
 
-#undef SANITIZER_INTERCEPT_TIMER_CREATE
-#define SANITIZER_INTERCEPT_TIMER_CREATE 0
-
 #undef SANITIZER_INTERCEPT_GETITIMER
 #define SANITIZER_INTERCEPT_GETITIMER 0
 
diff --git a/compiler-rt/lib/msan/tests/msan_test.cpp b/compiler-rt/lib/msan/tests/msan_test.cpp
index ad265acf4c1e39..41b99fabe84f47 100644
--- a/compiler-rt/lib/msan/tests/msan_test.cpp
+++ b/compiler-rt/lib/msan/tests/msan_test.cpp
@@ -4881,27 +4881,4 @@ TEST(MemorySanitizer, throw_catch) {
     // pass
   }
 }
-
-#if defined(__linux__)
-TEST(MemorySanitizer, timer_create) {
-  timer_t timer;
-  EXPECT_POISONED(timer);
-  int res = timer_create(CLOCK_REALTIME, nullptr, &timer);
-  ASSERT_EQ(0, res);
-  EXPECT_NOT_POISONED(timer);
-
-  // Make sure the timer is usable.
-  struct itimerspec cur_value {};
-  cur_value.it_value.tv_sec = 1;
-  EXPECT_EQ(0, timer_settime(timer, 0, &cur_value, nullptr));
-
-  timer_t timer2;
-  EXPECT_POISONED(timer2);
-  // Use an invalid clock_id to make timer_create fail.
-  res = timer_create(INT_MAX, nullptr, &timer2);
-  ASSERT_EQ(-1, res);
-  EXPECT_POISONED(timer2);
-  timer_delete(timer);
-}
-#endif
 } // namespace
diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors.inc b/compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors.inc
index 211f9f70d7e4c6..b8627f8557afe2 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors.inc
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors.inc
@@ -2289,24 +2289,6 @@ INTERCEPTOR(int, pthread_getcpuclockid, uptr thread,
 #define INIT_CLOCK_GETCPUCLOCKID
 #endif
 
-#if SANITIZER_INTERCEPT_TIMER_CREATE
-INTERCEPTOR(int, timer_create, __sanitizer_clockid_t clockid, void *sevp,
-            __sanitizer_timer_t *timer) {
-  void *ctx;
-  COMMON_INTERCEPTOR_ENTER(ctx, timer_create, clockid, sevp, timer);
-  int res = REAL(timer_create)(clockid, sevp, timer);
-  if (!res && timer) {
-    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, timer, sizeof *timer);
-  }
-  return res;
-}
-
-#  define INIT_TIMER_CREATE \
-    COMMON_INTERCEPT_FUNCTION_GLIBC_VER_MIN(timer_create, "GLIBC_2.3.3");
-#else
-#  define INIT_TIMER_CREATE
-#endif
-
 #if SANITIZER_INTERCEPT_GETITIMER
 INTERCEPTOR(int, getitimer, int which, void *curr_value) {
   void *ctx;
@@ -10284,7 +10266,6 @@ static void InitializeCommonInterceptors() {
   INIT_SETPWENT;
   INIT_CLOCK_GETTIME;
   INIT_CLOCK_GETCPUCLOCKID;
-  INIT_TIMER_CREATE;
   INIT_GETITIMER;
   INIT_TIME;
   INIT_GLOB;
diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_platform_interceptors.h b/compiler-rt/lib/sanitizer_common/sanitizer_platform_interceptors.h
index 36fafdc642642b..6959a6d52d604e 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_platform_interceptors.h
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_platform_interceptors.h
@@ -237,9 +237,6 @@
   (SI_FREEBSD || SI_NETBSD || SI_LINUX || SI_SOLARIS)
 #define SANITIZER_INTERCEPT_CLOCK_GETCPUCLOCKID \
   (SI_LINUX || SI_FREEBSD || SI_NETBSD)
-// TODO: This should be SI_POSIX, adding Linux first until I have time
-// to verify all timer_t typedefs on other platforms.
-#define SANITIZER_INTERCEPT_TIMER_CREATE SI_LINUX
 #define SANITIZER_INTERCEPT_GETITIMER SI_POSIX
 #define SANITIZER_INTERCEPT_TIME SI_POSIX
 #define SANITIZER_INTERCEPT_GLOB (SI_GLIBC || SI_SOLARIS)
diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_posix.h b/compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_posix.h
index b4ccf7b3d7bef4..e8c81aa8e28163 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_posix.h
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_posix.h
@@ -1517,10 +1517,6 @@ extern const int si_SEGV_ACCERR;
 
 #define SIGACTION_SYMNAME sigaction
 
-#  if SANITIZER_LINUX
-typedef void *__sanitizer_timer_t;
-#  endif
-
 #endif  // SANITIZER_LINUX || SANITIZER_APPLE
 
 #endif