[llvm-dev] Temporary disable ASan's allocator check

Jonas Devlieghere via llvm-dev llvm-dev at lists.llvm.org
Wed Sep 6 14:42:55 PDT 2017

> On Sep 6, 2017, at 9:14 PM, Kostya Serebryany <kcc at google.com> wrote:
> On Wed, Sep 6, 2017 at 8:43 AM, Jonas Devlieghere via llvm-dev <llvm-dev at lists.llvm.org <mailto:llvm-dev at lists.llvm.org>> wrote:
> Hi all,
> Is it possible to change the value of ASan's allocator_may_return_null at runtime or somehow disable this check temporarily? If I install an LLVM bad_alloc_error_handler, ASan's allocator wrapper detects this first and terminates the process instead of returning 0, preventing the custom handler from being called.
> Is this question related to "r312582 - Revert "[Decompression] Fail gracefully when out of memory”"?

It is! Though even if we don't need it, I’d still be interested to know whether this is possible. If the answer is no, I wonder how useful error handler is (which isn't currently used, at least not upstream). 

> Thanks,
> Jonas
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