[compiler-rt] 8b7b434 - [test][asan] Use posix_memalign for stacks

[Vitaly Buka via llvm-commits]

Author: Vitaly Buka
Date: 2023-08-15T23:47:15-07:00
New Revision: 8b7b434087cc4dc85e64632ae2780300c3c5d332

URL: https://github.com/llvm/llvm-project/commit/8b7b434087cc4dc85e64632ae2780300c3c5d332
DIFF: https://github.com/llvm/llvm-project/commit/8b7b434087cc4dc85e64632ae2780300c3c5d332.diff

LOG: [test][asan] Use posix_memalign for stacks

Looks Android and Darwin fail because of alignment.

Added: 
    

Modified: 
    compiler-rt/test/asan/TestCases/Posix/fake_stack_gc.cpp

Removed: 
    


################################################################################
diff  --git a/compiler-rt/test/asan/TestCases/Posix/fake_stack_gc.cpp b/compiler-rt/test/asan/TestCases/Posix/fake_stack_gc.cpp
index 82ad64eef36c1a..696d75ae7e1a84 100644
--- a/compiler-rt/test/asan/TestCases/Posix/fake_stack_gc.cpp
+++ b/compiler-rt/test/asan/TestCases/Posix/fake_stack_gc.cpp
@@ -11,6 +11,7 @@
 #include <signal.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <unistd.h>
 
 const size_t kStackSize = 0x100000;
 
@@ -62,8 +63,11 @@ void *Thread(void *arg) {
 
 int main(void) {
   // Allocate main and alt stack for future thread.
-  void *main_stack = malloc(kStackSize);
-  void *alt_stack = malloc(kStackSize);
+  void *main_stack;
+  void *alt_stack;
+  size_t const kPageSize = sysconf(_SC_PAGESIZE);
+  assert(posix_memalign(&main_stack, kPageSize, kStackSize) == 0);
+  assert(posix_memalign(&alt_stack, kPageSize, kStackSize) == 0);
 
   // Pick the lower stack as the main stack, as we want to trigger GC in
   // FakeStack from alt stack in a such way that main stack is allocated below.