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bpo-35214: Initial clang MemorySanitizer support (GH-10479)

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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.
This commit is contained in:
Gregory P. Smith 2018-11-12 12:07:14 -08:00 • committed by GitHub
parent a9655b7f71
commit 1584a00815
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9 changed files with 115 additions and 4 deletions
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45
configure vendored
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@ -819,6 +819,8 @@ enable_optimizations
with_lto
with_hash_algorithm
with_address_sanitizer
with_memory_sanitizer
with_undefined_behavior_sanitizer
with_libs
with_system_expat
with_system_ffi
@ -1515,7 +1517,10 @@ Optional Packages:
--with-hash-algorithm=[fnv|siphash24]
select hash algorithm
--with-address-sanitizer
enable AddressSanitizer
enable AddressSanitizer (asan)
--with-memory-sanitizer enable MemorySanitizer (msan)
--with-undefined-behavior-sanitizer
enable UndefinedBehaviorSanitizer (ubsan)
--with-libs='lib1 ...' link against additional libs
--with-system-expat build pyexpat module using an installed expat
library
@ -10038,6 +10043,44 @@ if test "${with_address_sanitizer+set}" = set; then :
$as_echo "$withval" >&6; }
BASECFLAGS="-fsanitize=address -fno-omit-frame-pointer $BASECFLAGS"
LDFLAGS="-fsanitize=address $LDFLAGS"
# ASan works by controlling memory allocation, our own malloc interferes.
with_pymalloc="no"
else
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
$as_echo "no" >&6; }
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for --with-memory-sanitizer" >&5
$as_echo_n "checking for --with-memory-sanitizer... " >&6; }
# Check whether --with-memory_sanitizer was given.
if test "${with_memory_sanitizer+set}" = set; then :
withval=$with_memory_sanitizer;
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $withval" >&5
$as_echo "$withval" >&6; }
BASECFLAGS="-fsanitize=memory -fsanitize-memory-track-origins=2 -fno-omit-frame-pointer $BASECFLAGS"
LDFLAGS="-fsanitize=memory -fsanitize-memory-track-origins=2 $LDFLAGS"
# MSan works by controlling memory allocation, our own malloc interferes.
with_pymalloc="no"
else
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
$as_echo "no" >&6; }
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for --with-undefined-behavior-sanitizer" >&5
$as_echo_n "checking for --with-undefined-behavior-sanitizer... " >&6; }
# Check whether --with-undefined_behavior_sanitizer was given.
if test "${with_undefined_behavior_sanitizer+set}" = set; then :
withval=$with_undefined_behavior_sanitizer;
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $withval" >&5
$as_echo "$withval" >&6; }
BASECFLAGS="-fsanitize=undefined $BASECFLAGS"
LDFLAGS="-fsanitize=undefined $LDFLAGS"
else
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5