[compiler-rt] Revert "[compiler-rt][rtsan] fopencookie support." (PR #121537)

[via llvm-commits]

https://github.com/gulfemsavrun created https://github.com/llvm/llvm-project/pull/121537

Reverts llvm/llvm-project#120864 because it broke building compiler-rt on Mac.
https://luci-milo.appspot.com/ui/p/fuchsia/builders/toolchain.ci/clang-mac-arm64/b8726812736235038609/overview


>From d198e1d914e8bb9522651da345e5aa8ba6917fad Mon Sep 17 00:00:00 2001
From: gulfemsavrun <gulfem at google.com>
Date: Thu, 2 Jan 2025 18:22:29 -0800
Subject: [PATCH] Revert "[compiler-rt][rtsan] fopencookie support. (#120864)"

This reverts commit 4b577830033066cfd1b2acf4fcf39950678b27bd.
---
 .../lib/rtsan/rtsan_interceptors_posix.cpp    |  7 ------
 .../tests/rtsan_test_interceptors_posix.cpp   | 23 -------------------
 2 files changed, 30 deletions(-)

diff --git a/compiler-rt/lib/rtsan/rtsan_interceptors_posix.cpp b/compiler-rt/lib/rtsan/rtsan_interceptors_posix.cpp
index 072923ab35ae0d..4e51f464b57304 100644
--- a/compiler-rt/lib/rtsan/rtsan_interceptors_posix.cpp
+++ b/compiler-rt/lib/rtsan/rtsan_interceptors_posix.cpp
@@ -297,12 +297,6 @@ INTERCEPTOR(FILE *, fdopen, int fd, const char *mode) {
   return REAL(fdopen)(fd, mode);
 }
 
-INTERCEPTOR(FILE *, fopencookie, void *cookie, const char *mode,
-            cookie_io_functions_t funcs) {
-  __rtsan_notify_intercepted_call("fopencookie");
-  return REAL(fopencookie)(cookie, mode, funcs);
-}
-
 #if SANITIZER_INTERCEPT_OPEN_MEMSTREAM
 INTERCEPTOR(FILE *, open_memstream, char **buf, size_t *size) {
   __rtsan_notify_intercepted_call("open_memstream");
@@ -978,7 +972,6 @@ void __rtsan::InitializeInterceptors() {
   INTERCEPT_FUNCTION(fputs);
   INTERCEPT_FUNCTION(fdopen);
   INTERCEPT_FUNCTION(freopen);
-  INTERCEPT_FUNCTION(fopencookie);
   RTSAN_MAYBE_INTERCEPT_OPEN_MEMSTREAM;
   RTSAN_MAYBE_INTERCEPT_FMEMOPEN;
   INTERCEPT_FUNCTION(lseek);
diff --git a/compiler-rt/lib/rtsan/tests/rtsan_test_interceptors_posix.cpp b/compiler-rt/lib/rtsan/tests/rtsan_test_interceptors_posix.cpp
index c9c4d7fc4e99ee..b052dd859dcdf6 100644
--- a/compiler-rt/lib/rtsan/tests/rtsan_test_interceptors_posix.cpp
+++ b/compiler-rt/lib/rtsan/tests/rtsan_test_interceptors_posix.cpp
@@ -353,29 +353,6 @@ TEST_F(RtsanFileTest, FopenDiesWhenRealtime) {
   ExpectNonRealtimeSurvival(Func);
 }
 
-TEST_F(RtsanFileTest, FopenCookieDieWhenRealtime) {
-  FILE *f = fopen(GetTemporaryFilePath(), "w");
-  EXPECT_THAT(f, Ne(nullptr));
-  struct fholder {
-    FILE *fp;
-    size_t read;
-  } fh = {f, 0};
-  auto CookieRead = [this](void *cookie, char *buf, size_t size) {
-    fholder *p = reinterpret_cast<fholder *>(cookie);
-    p->read = fread(static_cast<void *>(buf), 1, size, p->fp);
-    EXPECT_NE(0, p->read);
-  };
-  cookie_io_functions_t funcs = {(cookie_read_function_t *)&CookieRead, nullptr,
-                                 nullptr, nullptr};
-  auto Func = [&fh, &funcs]() {
-    FILE *f = fopencookie(&fh, "w", funcs);
-    EXPECT_THAT(f, Ne(nullptr));
-  };
-
-  ExpectRealtimeDeath(Func, "fopencookie");
-  ExpectNonRealtimeSurvival(Func);
-}
-
 #if SANITIZER_INTERCEPT_OPEN_MEMSTREAM
 TEST_F(RtsanFileTest, OpenMemstreamDiesWhenRealtime) {
   char *buffer;