Status: New
Owner: [email protected]
Labels: Type-Defect Priority-Medium
New issue 357 by [email protected]: Uninstrumented linked-only
executables fail to initialize ASan before main
https://code.google.com/p/address-sanitizer/issues/detail?id=357
On OS X 10.10, when you have an uninstrumented executable that only links
to the ASan dylib, ASan doesn't get initialized before main(). This means
that calling __asan_region_is_poisoned will crash because there is no
shadow memory. See the attached test case, which currently fails on OS X.
I noticed that the Posix/start-deactivated.cc testcase occasionally
randomly fails with a segfault, see
http://lab.llvm.org:8080/green/job/clang-stage1-cmake-RA-incremental_checkall/85/console ,
and I reduced the bug into this.
When there is any instrumented module, __asan_init will get called from the
module constructor, but when we only link to the dylib, it doesn't get
called before main. We should probably explicitly invoke __asan_init in a
constructor within ASan runtime.
Attachments:
linked_only.cc 696 bytes
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