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[3.7] bpo-35214: Initial clang MemorySanitizer support (GH-10479) #10492

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Merged
gpshead merged 3 commits into from
Nov 12, 2018
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[3.7] bpo-35214: Initial clang MemorySanitizer support (GH-10479) #10492

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bpo-35214: Initial clang MemorySanitizer support (GH-10479)
gpshead Nov 12, 2018
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[3.7] bpo-35214: Initial clang MemorySanitizer support (GH-10479)
gpshead Nov 12, 2018
3555211
Move the define about the pyatomic.h include.
gpshead Nov 12, 2018
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[3.7] bpo-35214: Initial clang MemorySanitizer support (GH-10479) 
Adds configure flags for msan and ubsan builds to make it easier to enable.
These also encode the detail that address sanitizer and memory sanitizer
should disable pymalloc.

Define MEMORY_SANITIZER when appropriate at build time and adds workarounds
to existing code to mark things as initialized where the sanitizer is otherwise unable to
determine that.  This lets our build succeed under the memory sanitizer.  not all tests
pass without sanitizer failures yet but we're in pretty good shape after this..
(cherry picked from commit 1584a00)

Co-authored-by: Gregory P. Smith <greg@krypto.org>
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gpshead committed Nov 12, 2018
commit ecd00fbbd89caae572040143e5452c575c396ae2

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