[hwasan] Remove system allocator fallback.

Summary:
This has been an experiment with late malloc interposition, made
possible by a non-standard feature of the Android dynamic loader.

Reviewers: pcc, mmalcomson

Subscribers: srhines, #sanitizers, llvm-commits

Tags: #sanitizers, #llvm

Differential Revision: https://reviews.llvm.org/D69199

llvm-svn: 375296

1 files changed, 0 insertions, 54 deletions

diff --git a/compiler-rt/test/hwasan/TestCases/Posix/system-allocator-fallback.cpp b/compiler-rt/test/hwasan/TestCases/Posix/system-allocator-fallback.cpp
deleted file mode 100644
index 8678d906dae..00000000000
--- a/compiler-rt/test/hwasan/TestCases/Posix/system-allocator-fallback.cpp
+++ /dev/null
@@ -1,54 +0,0 @@
-// RUN: %clangxx %s -o %t -ldl
-// RUN: %clangxx_hwasan -shared %s -o %t.so -DSHARED_LIB -shared-libsan -Wl,-rpath,%compiler_rt_libdir
-// RUN: %env_hwasan_opts=disable_allocator_tagging=0 %run %t
-
-// The dynamic loader on Android O appears to have a bug where it crashes when
-// dlopening DF_1_GLOBAL libraries.
-// REQUIRES: android-28
-
-#include <stddef.h>
-
-// Test that allocations made by the system allocator can be realloc'd and freed
-// by the hwasan allocator.
-
-typedef void run_test_fn(void *(*system_malloc)(size_t size));
-
-#ifdef SHARED_LIB
-
-// Call the __sanitizer_ versions of these functions so that the test
-// doesn't require the Android dynamic loader.
-extern "C" void *__sanitizer_realloc(void *ptr, size_t size);
-extern "C" void __sanitizer_free(void *ptr);
-
-extern "C" run_test_fn run_test;
-void run_test(void *(*system_malloc)(size_t size)) {
-  void *mem = system_malloc(64);
-  mem = __sanitizer_realloc(mem, 128);
-  __sanitizer_free(mem);
-}
-
-#else
-
-#include <dlfcn.h>
-#include <stdlib.h>
-#include <string>
-
-int main(int argc, char **argv) {
-  std::string path = argv[0];
-  path += ".so";
-  void *lib = dlopen(path.c_str(), RTLD_NOW);
-  if (!lib) {
-    printf("error in dlopen(): %s\n", dlerror());
-    return 1;
-  }
-
-  auto run_test = reinterpret_cast<run_test_fn *>(dlsym(lib, "run_test"));
-  if (!run_test) {
-    printf("failed dlsym\n");
-    return 1;
-  }
-
-  run_test(malloc);
-}
-
-#endif