[NFC][sanitizer] Remove calls to __asan_get_current_fake_stack

Unnecessary with -fsanitize-address-use-after-return=never.

for issue: google/sanitizers#1394

Reviewed By: vitalybuka

Differential Revision: https://reviews.llvm.org/D104154

Author: kda

compiler-rt/test/asan/TestCases/Posix/stack-overflow.cpp

@@ -31,7 +31,7 @@ volatile char x;
 volatile int y = 1;
 volatile int z0, z1, z2, z3, z4, z5, z6, z7, z8, z9, z10, z11, z12, z13;
 
-void recursive_func(char *p) {
+void recursive_func(uintptr_t parent_frame_address) {
 #if defined(SMALL_FRAME)
   char *buf = 0;
 #elif defined(SAVE_ALL_THE_REGISTERS)
@@ -69,14 +69,13 @@ void recursive_func(char *p) {
 #else
   char buf[BS];
   // Check that the stack grows in the righ direction, unless we use fake stack.
-  if (p && !__asan_get_current_fake_stack())
-    assert(p - buf >= BS);
+  assert(parent_frame_address > (uintptr_t)__builtin_frame_address(0));
   buf[rand() % BS] = 1;
   buf[rand() % BS] = 2;
   x = buf[rand() % BS];
 #endif
   if (y)
-    recursive_func(buf);
+    recursive_func((uintptr_t)__builtin_frame_address(0));
   x = 1; // prevent tail call optimization
   // CHECK: {{stack-overflow on address 0x.* \(pc 0x.* bp 0x.* sp 0x.* T.*\)}}
   // If stack overflow happens during function prologue, stack trace may be
@@ -85,7 +84,7 @@ void recursive_func(char *p) {
 }
 
 void *ThreadFn(void* unused) {
-  recursive_func(0);
+  recursive_func((uintptr_t)__builtin_frame_address(0));
   return 0;
 }
 
@@ -110,7 +109,7 @@ int main(int argc, char **argv) {
   pthread_create(&t, 0, ThreadFn, 0);
   pthread_join(t, 0);
 #else
-  recursive_func(0);
+  recursive_func((uintptr_t)__builtin_frame_address(0));
 #endif
   return 0;
 }

compiler-rt/test/asan/TestCases/contiguous_container.cpp

@@ -65,11 +65,7 @@ void TestThrow() {
   assert(__asan_address_is_poisoned(x + 14));
   ThrowAndCatch();
   assert(!__asan_address_is_poisoned(x + 13));
-  // FIXME: invert the assertion below once we fix
-  // https://code.google.com/p/address-sanitizer/issues/detail?id=258
-  // This assertion works only w/o UAR.
-  if (!__asan_get_current_fake_stack())
-    assert(!__asan_address_is_poisoned(x + 14));
+  assert(!__asan_address_is_poisoned(x + 14));
   __sanitizer_annotate_contiguous_container(x, x + 32, x + 14, x + 32);
   assert(!__asan_address_is_poisoned(x + 13));
   assert(!__asan_address_is_poisoned(x + 14));

compiler-rt/test/asan/TestCases/longjmp.cpp

@@ -1,4 +1,4 @@
-// RUN: %clangxx_asan -O %s -o %t && %run %t
+// RUN: %clangxx_asan -fsanitize-address-use-after-return=never -O %s -o %t && %run %t
 
 #include <assert.h>
 #include <setjmp.h>
@@ -17,9 +17,5 @@ int main() {
     longjmp(buf, 1);
   fprintf(stderr, "After:  %p poisoned: %d\n",  &x,
           __asan_address_is_poisoned(x + 32));
-  // FIXME: Invert this assertion once we fix
-  // https://code.google.com/p/address-sanitizer/issues/detail?id=258
-  // This assertion works only w/o UAR.
-  if (!__asan_get_current_fake_stack())
-    assert(!__asan_address_is_poisoned(x + 32));
+  assert(!__asan_address_is_poisoned(x + 32));
 }

compiler-rt/test/asan/TestCases/throw_catch.cpp

@@ -1,4 +1,4 @@
-// RUN: %clangxx_asan -O %s -o %t && %run %t
+// RUN: %clangxx_asan -fsanitize-address-use-after-return=never -O %s -o %t && %run %t
 
 #include <assert.h>
 #include <stdio.h>
@@ -30,11 +30,7 @@ void TestThrow() {
   ThrowAndCatch();
   fprintf(stderr, "After:  %p poisoned: %d\n",  &x,
           __asan_address_is_poisoned(x + 32));
-  // FIXME: Invert this assertion once we fix
-  // https://code.google.com/p/address-sanitizer/issues/detail?id=258
-  // This assertion works only w/o UAR.
-  if (!__asan_get_current_fake_stack())
-    assert(!__asan_address_is_poisoned(x + 32));
+  assert(!__asan_address_is_poisoned(x + 32));
 }
 
 __attribute__((noinline))
@@ -50,11 +46,7 @@ void TestThrowInline() {
   }
   fprintf(stderr, "After:  %p poisoned: %d\n",  &x,
           __asan_address_is_poisoned(x + 32));
-  // FIXME: Invert this assertion once we fix
-  // https://code.google.com/p/address-sanitizer/issues/detail?id=258
-  // This assertion works only w/o UAR.
-  if (!__asan_get_current_fake_stack())
-    assert(!__asan_address_is_poisoned(x + 32));
+  assert(!__asan_address_is_poisoned(x + 32));
 }
 
 int main(int argc, char **argv) {