[hwasan] Fix suppression of leaks from dlsym

[Enna1]

Header "lsan/lsan_common.h" is not included, CAN_SANITIZE_LEAKS macro is expanded to 0, so suppression of leaks from dlsym doesn't take effect.

[llvmbot]

@llvm/pr-subscribers-compiler-rt-sanitizer

Author: Mingjie Xu (Enna1)

Changes

Header "lsan/lsan_common.h" is not included, CAN_SANITIZE_LEAKS macro is expanded to 0, so suppression of leaks from dlsym doesn't take effect.

---

Full diff: https://github.com/llvm/llvm-project/pull/154073.diff

1 Files Affected:

• (modified) compiler-rt/lib/hwasan/hwasan_allocation_functions.cpp (+1)

diff --git a/compiler-rt/lib/hwasan/hwasan_allocation_functions.cpp b/compiler-rt/lib/hwasan/hwasan_allocation_functions.cpp
index 25ca0a3b0b68e..7609e6cd65b7a 100644
--- a/compiler-rt/lib/hwasan/hwasan_allocation_functions.cpp
+++ b/compiler-rt/lib/hwasan/hwasan_allocation_functions.cpp
@@ -14,6 +14,7 @@
 
 #include "hwasan.h"
 #include "interception/interception.h"
+#include "lsan/lsan_common.h"
 #include "sanitizer_common/sanitizer_allocator_dlsym.h"
 #include "sanitizer_common/sanitizer_allocator_interface.h"
 #include "sanitizer_common/sanitizer_mallinfo.h"

[fmayer]

Can we add a test for this?

[Enna1]

Can we add a test for this?

Sorry, I don't have a test.

This issue is exposed when I add Wundef to compiler flags.

[12/21] Building CXX object compiler-rt/lib/hwasan/CMakeFiles/RTHwasanAliases_dynamic.x86_64.dir/hwasan_allocation_functions.cpp.o
In file included from /data00/home/xumingjie.enna1/llvm-project/compiler-rt/lib/hwasan/hwasan_allocation_functions.cpp:15:
In file included from /data00/home/xumingjie.enna1/llvm-project/compiler-rt/lib/hwasan/hwasan.h:17:
In file included from /data00/home/xumingjie.enna1/llvm-project/compiler-rt/lib/hwasan/hwasan_flags.h:15:
In file included from /data00/home/xumingjie.enna1/llvm-project/compiler-rt/lib/hwasan/../sanitizer_common/sanitizer_internal_defs.h:15:
/data00/home/xumingjie.enna1/llvm-project/compiler-rt/lib/hwasan/../sanitizer_common/sanitizer_platform.h:415:5: warning: 'SANITIZER_GO' is not defined, evaluates to 0 [-Wundef]
415 | #if SANITIZER_GO == 0
| ^
In file included from /data00/home/xumingjie.enna1/llvm-project/compiler-rt/lib/hwasan/hwasan_allocation_functions.cpp:16:
/data00/home/xumingjie.enna1/llvm-project/compiler-rt/lib/hwasan/../interception/interception.h:171:7: warning: 'SANITIZER_AIX' is not defined, evaluates to 0 [-Wundef]
171 | #elif SANITIZER_AIX
| ^
/data00/home/xumingjie.enna1/llvm-project/compiler-rt/lib/hwasan/../interception/interception.h:380:5: warning: 'SANITIZER_AIX' is not defined, evaluates to 0 [-Wundef]
380 | #if SANITIZER_AIX
| ^
/data00/home/xumingjie.enna1/llvm-project/compiler-rt/lib/hwasan/hwasan_allocation_functions.cpp:26:7: warning: 'CAN_SANITIZE_LEAKS' is not defined, evaluates to 0 [-Wundef]
26 | # if CAN_SANITIZE_LEAKS
| ^
/data00/home/xumingjie.enna1/llvm-project/compiler-rt/lib/hwasan/hwasan_allocation_functions.cpp:33:7: warning: 'CAN_SANITIZE_LEAKS' is not defined, evaluates to 0 [-Wundef]
33 | # if CAN_SANITIZE_LEAKS
| ^
5 warnings generated.

[Enna1]

As you can see, there are other undefined marcos also evaluated to 0.
Maybe we should fix them and add -Wundef when compiling compiler-rt...

[vitalybuka]

This probably can be extended as test compiler-rt/test/sanitizer_common/TestCases/dlsym_alloc.c
As is, it does not have consistent leaks, you can try to reproduce without your patch

[vitalybuka]

With or without test it's LGTM
But it could be better with a test.

[vitalybuka]

As you can see, there are other undefined marcos also evaluated to 0. Maybe we should fix them and add -Wundef when compiling compiler-rt...

-Wundef would be nice, but not in this patch