[llvm] r292862 - [sanitizer-coverage] emit __sanitizer_cov_trace_pc_guard w/o a preceding 'if' by default. Update the docs, also add deprecation notes around other parts of sanitizer coverage

Tue Jan 24 16:09:48 PST 2017

r292994 disables the failing parts of the test, still investigating.

On Tue, Jan 24, 2017 at 3:56 PM, Kostya Serebryany <kcc at google.com> wrote:

> yes, give me 30 minutes.
>
> On Tue, Jan 24, 2017 at 3:50 PM, Chandler Carruth <chandlerc at google.com>
> wrote:
>
>> So, we've lost over a day of build bot coverage on PPC.
>>
>> Kostya, before detailed investigation, can you at least let the bots
>> return to green? I don't really care between revert and disable on PPC. I
>> just want these bots to go green:
>> http://lab.llvm.org:8011/builders/clang-ppc64be-linux-lnt
>> http://lab.llvm.org:8011/builders/clang-ppc64le-linux-lnt
>> http://lab.llvm.org:8011/builders/clang-ppc64be-linux-multistage
>> http://lab.llvm.org:8011/builders/clang-ppc64le-linux-multistage
>> http://lab.llvm.org:8011/builders/clang-ppc64be-linux
>> http://lab.llvm.org:8011/builders/clang-ppc64le-linux
>>
>>
>> On Tue, Jan 24, 2017 at 3:48 PM Kostya Serebryany via llvm-commits <
>> llvm-commits at lists.llvm.org> wrote:
>>
>>> turns out one of the x86 bots is failing too (gcc build fails, clang
>>> build passes).
>>> http://lab.llvm.org:8011/builders/sanitizer-x86_64-linux/
>>> builds/721/steps/check-asan%20in%20gcc%20build/logs/stdio
>>> This gives me a way to reproduce, looking.
>>>
>>>
>>> On Tue, Jan 24, 2017 at 1:43 PM, Eric Christopher <echristo at gmail.com>
>>> wrote:
>>>
>>>
>>>
>>> On Tue, Jan 24, 2017 at 1:37 PM Kostya Serebryany <kcc at google.com>
>>> wrote:
>>>
>>> On Tue, Jan 24, 2017 at 1:34 PM, Eric Christopher <echristo at gmail.com>
>>> wrote:
>>>
>>>
>>>
>>> On Tue, Jan 24, 2017 at 1:23 PM Kostya Serebryany <kcc at google.com>
>>> wrote:
>>>
>>> On Tue, Jan 24, 2017 at 1:17 PM, Eric Christopher <echristo at gmail.com>
>>> wrote:
>>>
>>>
>>>
>>> On Tue, Jan 24, 2017 at 11:49 AM Kostya Serebryany <kcc at google.com>
>>> wrote:
>>>
>>> On Tue, Jan 24, 2017 at 11:45 AM, Eric Christopher <echristo at gmail.com>
>>> wrote:
>>>
>>> This seems problematic in general - we have a bot that is failing due to
>>> a particular test. Is this patch necessary for correctness somewhere else?
>>>
>>>
>>> Correctness -- no. Performance -- yes, and in some cases very
>>> significant.
>>>
>>>
>>> OK. Thanks.
>>>
>>>
>>>
>>>
>>> Can it be reverted until we can figure out what's going on?
>>>
>>>
>>> Sure we can revert it, but who is going to analyze the problem and how
>>> soon?
>>>
>>>
>>> I'm hoping someone at IBM can take a look at it. I've got limited
>>> ability to debug it myself at the moment.
>>>
>>> Kit: Would you mind terribly?
>>> Kostya: It might be nice to revert in the mean time if you don't mind?
>>>
>>>
>>> I do mind, sorry.
>>> Again, this functionality is not used by anyone on PPC (afaict) but is
>>> important for libFuzzer users on x86 side.
>>>
>>>
>>> I believe this could be causing problems not just in libFuzzer and so
>>> affect anyone trying to use the sanitizer on ppc at all?
>>>
>>>
>>> I doubt so. This change affects sanitizer coverage (
>>> https://clang.llvm.org/docs/SanitizerCoverage.html),
>>> which is usually used together with *san and libFuzzer.
>>>
>>>
>>> OK. Thanks for the clarification.
>>>
>>> In general, we have a revert first policy and so this should probably
>>> have fallen under there without letting people know what the plan was for
>>> making sure the bots come back - it's important that we continue to get bot
>>> testing for asan in general.
>>>
>>> Thanks!
>>>
>>> -eric
>>>
>>>
>>>
>>>
>>>
>>> If not, can you explain the scope of this a bit better - especially as
>>> it's now a flaky failure?
>>>
>>> -eric
>>>
>>>
>>>
>>>
>>>
>>> Thanks!
>>>
>>> -eric
>>>
>>>
>>> Note that the functionality tested in this test is not the core asan,
>>> but the coverage instrumentation used by libFuzzer,
>>> and afaict there are no users of libFuzzer on PPC, so we can just
>>> disable the test on PPC and no users will be harmed.
>>>
>>>
>>>
>>> -eric
>>>
>>> On Tue, Jan 24, 2017 at 11:29 AM Kostya Serebryany via llvm-commits <
>>> llvm-commits at lists.llvm.org> wrote:
>>>
>>> Hi Bill,
>>>
>>> thanks for the report.
>>> Unfortunately, I don't have anyone working on the PPC side at the moment
>>> and the test passes on x86.
>>> So, the only thing I can propose now is to disable this test on PPC.
>>> (Maybe it's not that bad, I was going to kill at least some of the
>>> related code this year).
>>>
>>> --kcc
>>>
>>> On Tue, Jan 24, 2017 at 8:44 AM, Bill Seurer <seurer at linux.vnet.ibm.com>
>>> wrote:
>>>
>>> This broke the powerpc sanitizers.
>>>
>>> updatellvm 292861
>>> ninja
>>> ninja check-asan
>>> Testing Time: 29.65s
>>>   Expected Passes    : 457
>>>   Expected Failures  : 1
>>>   Unsupported Tests  : 157
>>>
>>> updatellvm 292862
>>> ninja
>>> ninja check-asan
>>>
>>> FAIL: AddressSanitizer-powerpc64le-linux ::
>>> TestCases/Posix/coverage-direct.cc (528 of 615)
>>> ******************** TEST 'AddressSanitizer-powerpc64le-linux ::
>>> TestCases/Posix/coverage-direct.cc' FAILED ********************
>>> Script:
>>> --
>>> /home/seurer/llvm/build/llvm-test2/./bin/clang --driver-mode=g++
>>> -fsanitize=address -mno-omit-leaf-frame-pointer -fno-omit-frame-pointer
>>> -fno-optimize-sibling-calls -gline-tables-only -m64
>>> -fsanitize-coverage=func -DSHARED /home/seurer/llvm/llvm-test2/p
>>> rojects/compiler-rt/test/asan/TestCases/Posix/coverage-direct.cc
>>> -shared -o /home/seurer/llvm/build/llvm-test2/projects/compiler-rt/test
>>> /asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/lib$(basename
>>> /home/seurer/llvm/build/llvm-test2/projects/compiler-rt/test
>>> /asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/coverage-direct.cc.tmp).dynamic.so
>>> -fPIC
>>> /home/seurer/llvm/build/llvm-test2/./bin/clang --driver-mode=g++
>>> -fsanitize=address -mno-omit-leaf-frame-pointer -fno-omit-frame-pointer
>>> -fno-optimize-sibling-calls -gline-tables-only -m64
>>> -fsanitize-coverage=func /home/seurer/llvm/llvm-test2/p
>>> rojects/compiler-rt/test/asan/TestCases/Posix/coverage-direct.cc -ldl
>>> -o /home/seurer/llvm/build/llvm-test2/projects/compiler-rt/test
>>> /asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/coverage
>>> -direct.cc.tmp
>>> rm -rf /home/seurer/llvm/build/llvm-test2/projects/compiler-rt/test
>>> /asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/coverage-direct
>>> mkdir -p /home/seurer/llvm/build/llvm-test2/projects/compiler-rt/test
>>> /asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/coverage
>>> -direct/normal
>>> env ASAN_OPTIONS=coverage=1:coverage_direct=0:coverage_dir=/
>>> home/seurer/llvm/build/llvm-test2/projects/compiler-rt/
>>> test/asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/coverage-direct/normal:verbosity=1
>>>
>>> /home/seurer/llvm/build/llvm-test2/projects/compiler-rt/test
>>> /asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/coverage-direct.cc.tmp
>>> /home/seurer/llvm/build/llvm-test2/projects/compiler-rt/test
>>> /asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/lib$(basename
>>> /home/seurer/llvm/build/llvm-test2/projects/compiler-rt/test
>>> /asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/coverage
>>> -direct.cc.tmp).dynamic.so
>>> /usr/bin/python2.7 /home/seurer/llvm/llvm-test2/p
>>> rojects/compiler-rt/lib/sanitizer_common/scripts/sancov.py print
>>> /home/seurer/llvm/build/llvm-test2/projects/compiler-rt/test
>>> /asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/coverage-direct/normal/*.sancov
>>> >/home/seurer/llvm/build/llvm-test2/projects/compiler-rt/tes
>>> t/asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/coverag
>>> e-direct/normal/out.txt
>>> mkdir -p /home/seurer/llvm/build/llvm-test2/projects/compiler-rt/test
>>> /asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/coverage
>>> -direct/direct
>>> env ASAN_OPTIONS=coverage=1:coverage_direct=1:coverage_dir=/
>>> home/seurer/llvm/build/llvm-test2/projects/compiler-rt/
>>> test/asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/coverage-direct/direct:verbosity=1
>>>
>>> /home/seurer/llvm/build/llvm-test2/projects/compiler-rt/test
>>> /asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/coverage-direct.cc.tmp
>>> /home/seurer/llvm/build/llvm-test2/projects/compiler-rt/test
>>> /asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/lib$(basename
>>> /home/seurer/llvm/build/llvm-test2/projects/compiler-rt/test
>>> /asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/coverage
>>> -direct.cc.tmp).dynamic.so
>>> cd /home/seurer/llvm/build/llvm-test2/projects/compiler-rt/test
>>> /asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/coverage
>>> -direct/direct
>>> /usr/bin/python2.7 /home/seurer/llvm/llvm-test2/p
>>> rojects/compiler-rt/lib/sanitizer_common/scripts/sancov.py rawunpack
>>> *.sancov.raw
>>> /usr/bin/python2.7 /home/seurer/llvm/llvm-test2/p
>>> rojects/compiler-rt/lib/sanitizer_common/scripts/sancov.py print
>>> *.sancov >out.txt
>>> cd ../..
>>> diff -u coverage-direct/normal/out.txt coverage-direct/direct/out.txt
>>> /home/seurer/llvm/build/llvm-test2/./bin/clang --driver-mode=g++
>>> -fsanitize=address -mno-omit-leaf-frame-pointer -fno-omit-frame-pointer
>>> -fno-optimize-sibling-calls -gline-tables-only -m64 -fsanitize-coverage=bb
>>> -DSHARED /home/seurer/llvm/llvm-test2/projects/compiler-rt/test/asan/
>>> TestCases/Posix/coverage-direct.cc -shared -o
>>> /home/seurer/llvm/build/llvm-test2/projects/compiler-rt/test
>>> /asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/lib$(basename
>>> /home/seurer/llvm/build/llvm-test2/projects/compiler-rt/test
>>> /asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/coverage-direct.cc.tmp).dynamic.so
>>> -fPIC
>>> /home/seurer/llvm/build/llvm-test2/./bin/clang --driver-mode=g++
>>> -fsanitize=address -mno-omit-leaf-frame-pointer -fno-omit-frame-pointer
>>> -fno-optimize-sibling-calls -gline-tables-only -m64 -fsanitize-coverage=bb
>>> -DSO_DIR=\"/home/seurer/llvm/build/llvm-test2/projects/compi
>>> ler-rt/test/asan/POWERPC64LELinuxConfig/TestCases/Posix/Output\"
>>> /home/seurer/llvm/llvm-test2/projects/compiler-rt/test/asan/
>>> TestCases/Posix/coverage-direct.cc -ldl -o
>>> /home/seurer/llvm/build/llvm-test2/projects/compiler-rt/test
>>> /asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/coverage
>>> -direct.cc.tmp
>>> rm -rf /home/seurer/llvm/build/llvm-test2/projects/compiler-rt/test
>>> /asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/coverage-direct
>>> mkdir -p /home/seurer/llvm/build/llvm-test2/projects/compiler-rt/test
>>> /asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/coverage
>>> -direct/normal
>>> env ASAN_OPTIONS=coverage=1:coverage_direct=0:coverage_dir=/
>>> home/seurer/llvm/build/llvm-test2/projects/compiler-rt/
>>> test/asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/coverage-direct/normal:verbosity=1
>>>
>>> /home/seurer/llvm/build/llvm-test2/projects/compiler-rt/test
>>> /asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/coverage-direct.cc.tmp
>>> /home/seurer/llvm/build/llvm-test2/projects/compiler-rt/test
>>> /asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/lib$(basename
>>> /home/seurer/llvm/build/llvm-test2/projects/compiler-rt/test
>>> /asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/coverage
>>> -direct.cc.tmp).dynamic.so
>>> /usr/bin/python2.7 /home/seurer/llvm/llvm-test2/p
>>> rojects/compiler-rt/lib/sanitizer_common/scripts/sancov.py print
>>> /home/seurer/llvm/build/llvm-test2/projects/compiler-rt/test
>>> /asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/coverage-direct/normal/*.sancov
>>> >/home/seurer/llvm/build/llvm-test2/projects/compiler-rt/tes
>>> t/asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/coverag
>>> e-direct/normal/out.txt
>>> mkdir -p /home/seurer/llvm/build/llvm-test2/projects/compiler-rt/test
>>> /asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/coverage
>>> -direct/direct
>>> env ASAN_OPTIONS=coverage=1:coverage_direct=1:coverage_dir=/
>>> home/seurer/llvm/build/llvm-test2/projects/compiler-rt/
>>> test/asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/coverage-direct/direct:verbosity=1
>>>
>>> /home/seurer/llvm/build/llvm-test2/projects/compiler-rt/test
>>> /asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/coverage-direct.cc.tmp
>>> /home/seurer/llvm/build/llvm-test2/projects/compiler-rt/test
>>> /asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/lib$(basename
>>> /home/seurer/llvm/build/llvm-test2/projects/compiler-rt/test
>>> /asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/coverage
>>> -direct.cc.tmp).dynamic.so
>>> cd /home/seurer/llvm/build/llvm-test2/projects/compiler-rt/test
>>> /asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/coverage
>>> -direct/direct
>>> /usr/bin/python2.7 /home/seurer/llvm/llvm-test2/p
>>> rojects/compiler-rt/lib/sanitizer_common/scripts/sancov.py rawunpack
>>> *.sancov.raw
>>> /usr/bin/python2.7 /home/seurer/llvm/llvm-test2/p
>>> rojects/compiler-rt/lib/sanitizer_common/scripts/sancov.py print
>>> *.sancov >out.txt
>>> cd ../..
>>> diff -u coverage-direct/normal/out.txt coverage-direct/direct/out.txt
>>> /home/seurer/llvm/build/llvm-test2/./bin/clang --driver-mode=g++
>>> -fsanitize=address -mno-omit-leaf-frame-pointer -fno-omit-frame-pointer
>>> -fno-optimize-sibling-calls -gline-tables-only -m64
>>> -fsanitize-coverage=edge -DSHARED /home/seurer/llvm/llvm-test2/p
>>> rojects/compiler-rt/test/asan/TestCases/Posix/coverage-direct.cc
>>> -shared -o /home/seurer/llvm/build/llvm-test2/projects/compiler-rt/test
>>> /asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/lib$(basename
>>> /home/seurer/llvm/build/llvm-test2/projects/compiler-rt/test
>>> /asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/coverage-direct.cc.tmp).dynamic.so
>>> -fPIC
>>> /home/seurer/llvm/build/llvm-test2/./bin/clang --driver-mode=g++
>>> -fsanitize=address -mno-omit-leaf-frame-pointer -fno-omit-frame-pointer
>>> -fno-optimize-sibling-calls -gline-tables-only -m64
>>> -fsanitize-coverage=edge -DSO_DIR=\"/home/seurer/llvm/b
>>> uild/llvm-test2/projects/compiler-rt/test/asan/POWERPC64LELi
>>> nuxConfig/TestCases/Posix/Output\" /home/seurer/llvm/llvm-test2/p
>>> rojects/compiler-rt/test/asan/TestCases/Posix/coverage-direct.cc -ldl
>>> -o /home/seurer/llvm/build/llvm-test2/projects/compiler-rt/test
>>> /asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/coverage
>>> -direct.cc.tmp
>>> rm -rf /home/seurer/llvm/build/llvm-test2/projects/compiler-rt/test
>>> /asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/coverage-direct
>>> mkdir -p /home/seurer/llvm/build/llvm-test2/projects/compiler-rt/test
>>> /asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/coverage
>>> -direct/normal
>>> env ASAN_OPTIONS=coverage=1:coverage_direct=0:coverage_dir=/
>>> home/seurer/llvm/build/llvm-test2/projects/compiler-rt/
>>> test/asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/coverage-direct/normal:verbosity=1
>>>
>>> /home/seurer/llvm/build/llvm-test2/projects/compiler-rt/test
>>> /asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/coverage-direct.cc.tmp
>>> /home/seurer/llvm/build/llvm-test2/projects/compiler-rt/test
>>> /asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/lib$(basename
>>> /home/seurer/llvm/build/llvm-test2/projects/compiler-rt/test
>>> /asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/coverage
>>> -direct.cc.tmp).dynamic.so
>>> /usr/bin/python2.7 /home/seurer/llvm/llvm-test2/p
>>> rojects/compiler-rt/lib/sanitizer_common/scripts/sancov.py print
>>> /home/seurer/llvm/build/llvm-test2/projects/compiler-rt/test
>>> /asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/coverage-direct/normal/*.sancov
>>> >/home/seurer/llvm/build/llvm-test2/projects/compiler-rt/tes
>>> t/asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/coverag
>>> e-direct/normal/out.txt
>>> mkdir -p /home/seurer/llvm/build/llvm-test2/projects/compiler-rt/test
>>> /asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/coverage
>>> -direct/direct
>>> env ASAN_OPTIONS=coverage=1:coverage_direct=1:coverage_dir=/
>>> home/seurer/llvm/build/llvm-test2/projects/compiler-rt/
>>> test/asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/coverage-direct/direct:verbosity=1
>>>
>>> /home/seurer/llvm/build/llvm-test2/projects/compiler-rt/test
>>> /asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/coverage-direct.cc.tmp
>>> /home/seurer/llvm/build/llvm-test2/projects/compiler-rt/test
>>> /asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/lib$(basename
>>> /home/seurer/llvm/build/llvm-test2/projects/compiler-rt/test
>>> /asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/coverage
>>> -direct.cc.tmp).dynamic.so
>>> cd /home/seurer/llvm/build/llvm-test2/projects/compiler-rt/test
>>> /asan/POWERPC64LELinuxConfig/TestCases/Posix/Output/coverage
>>> -direct/direct
>>> /usr/bin/python2.7 /home/seurer/llvm/llvm-test2/p
>>> rojects/compiler-rt/lib/sanitizer_common/scripts/sancov.py rawunpack
>>> *.sancov.raw
>>> /usr/bin/python2.7 /home/seurer/llvm/llvm-test2/p
>>> rojects/compiler-rt/lib/sanitizer_common/scripts/sancov.py print
>>> *.sancov >out.txt
>>> cd ../..
>>> diff -u coverage-direct/normal/out.txt coverage-direct/direct/out.txt
>>> --
>>> Exit Code: 1
>>>
>>> Command Output (stdout):
>>> --
>>> bar
>>> bar
>>> bar
>>> bar
>>> --- coverage-direct/normal/out.txt      2017-01-24 10:20:41.258917000
>>> -0600
>>> +++ coverage-direct/direct/out.txt      2017-01-24 10:20:41.638917000
>>> -0600
>>> @@ -1 +1,2 @@
>>>  0x10128bb0
>>> +0x10128bb0
>>>
>>> --
>>> Command Output (stderr):
>>> --
>>> ==18701==AddressSanitizer: failed to intercept '__isoc99_printf'
>>> ==18701==AddressSanitizer: failed to intercept '__isoc99_sprintf'
>>> ==18701==AddressSanitizer: failed to intercept '__isoc99_snprintf'
>>> ==18701==AddressSanitizer: failed to intercept '__isoc99_fprintf'
>>> ==18701==AddressSanitizer: failed to intercept '__isoc99_vprintf'
>>> ==18701==AddressSanitizer: failed to intercept '__isoc99_vsprintf'
>>> ==18701==AddressSanitizer: failed to intercept '__isoc99_vsnprintf'
>>> ==18701==AddressSanitizer: failed to intercept '__isoc99_vfprintf'
>>> ==18701==AddressSanitizer: libc interceptors initialized
>>> || `[0x0a0000000000, 0x3fffffffffff]` || HighMem    ||
>>> || `[0x034000000000, 0x09ffffffffff]` || HighShadow ||
>>> || `[0x024000000000, 0x033fffffffff]` || ShadowGap  ||
>>> || `[0x020000000000, 0x023fffffffff]` || LowShadow  ||
>>> || `[0x000000000000, 0x01ffffffffff]` || LowMem     ||
>>> MemToShadow(shadow): 0x024000000000 0x0247ffffffff 0x026800000000
>>> 0x033fffffffff
>>> redzone=16
>>> max_redzone=2048
>>> quarantine_size_mb=256M
>>> thread_local_quarantine_size_kb=1024K
>>> malloc_context_size=30
>>> SHADOW_SCALE: 3
>>> SHADOW_GRANULARITY: 8
>>> SHADOW_OFFSET: 0x20000000000
>>> ==18701==Installed the sigaction for signal 11
>>> ==18701==Installed the sigaction for signal 7
>>> ==18701==Installed the sigaction for signal 8
>>> ==18701==T0: stack [0x3fffdd8c0000,0x3fffde0c0000) size 0x800000;
>>> local=0x3fffde0ba450
>>> ==18701==AddressSanitizer Init done
>>> PID: 18701
>>> ==18701== CovDump: /home/seurer/llvm/build/llvm-t
>>> est2/projects/compiler-rt/test/asan/POWERPC64LELinuxConfig/T
>>> estCases/Posix/Output/coverage-direct/normal/coverage-direct.cc.tmp.18701.sancov:
>>> 1 PCs written
>>> ==18701== CovDump: /home/seurer/llvm/build/llvm-t
>>> est2/projects/compiler-rt/test/asan/POWERPC64LELinuxConfig/T
>>> estCases/Posix/Output/coverage-direct/normal/libcoverage-dir
>>> ect.cc.tmp.dynamic.so.18701.sancov: 1 PCs written
>>> /home/seurer/llvm/llvm-test2/projects/compiler-rt/lib/sanitizer_common/scripts/sancov.py:
>>> read 1 64-bit PCs from /home/seurer/llvm/build/llvm-t
>>> est2/projects/compiler-rt/test/asan/POWERPC64LELinuxConfig/T
>>> estCases/Posix/Output/coverage-direct/normal/coverage-
>>> direct.cc.tmp.18701.sancov
>>> /home/seurer/llvm/llvm-test2/projects/compiler-rt/lib/sanitizer_common/scripts/sancov.py:
>>> read 1 64-bit PCs from /home/seurer/llvm/build/llvm-t
>>> est2/projects/compiler-rt/test/asan/POWERPC64LELinuxConfig/T
>>> estCases/Posix/Output/coverage-direct/normal/libcoverage-dir
>>> ect.cc.tmp.dynamic.so.18701.sancov
>>> /home/seurer/llvm/llvm-test2/projects/compiler-rt/lib/sanitizer_common/scripts/sancov.py:
>>> 2 files merged; 2 PCs total
>>> ==19909==AddressSanitizer: failed to intercept '__isoc99_printf'
>>>
>>>
>
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