http://llvm.org/bugs/show_bug.cgi?id=22026
Bug ID: 22026
Summary: LargeMmapAllocator crashes the process on OOM even if
allocator_may_return_null=1
Product: compiler-rt
Version: unspecified
Hardware: PC
OS: Windows NT
Status: NEW
Severity: normal
Priority: P
Component: compiler-rt
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
This hits us on Chromium on Win32 (32-bit):
[ RUN ] DiscardableMemoryTests/DiscardableMemoryTest.AddressSpace/0
==8508==ERROR: AddressSanitizer failed to allocate 0x408000 (4227072) bytes of
LargeMmapAllocator (error code: 8)
==8508==AddressSanitizer CHECK failed:
D:\src\chr_trunk\src\third_party\llvm\projects\compiler-rt\lib\sanitizer_common\sanitizer_win.cc:89
"(("unable to mmap" && 0)) != (0)" (0x0, 0x0)
Looking at the LargeMmapAllocator code, it unconditionally does MmapOrDie, so
this is not OOM-friendly.
It's likely we haven't seen this earlier because it's much harder to OOM on x64
:)
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