Status: New
Owner: ----
CC: [email protected], [email protected], [email protected],
[email protected]
Labels: Type-Bug Priority-Medium
New issue 3150 by [email protected]: NaCl: Mysterious test failures which
boil down to not being able to pass v8::internal::Vector as a param
http://code.google.com/p/v8/issues/detail?id=3150
Example failure:
http://build.chromium.org/p/client.v8/builders/NaCl%20V8%20Linux64%20-%20stable/builds/1587/steps/Check/logs/stdio
=== cctest/test-api/PreCompileInvalidPreparseDataError ===
--- stderr ---
DEBUG MODE ENABLED (bypass acl)
DEBUG MODE ENABLED (skip validator)
[1185,4071294784:02:55:16.749217] BYPASSING ALL ACL CHECKS
[1185,4071294784:02:55:16.749877] Native Client module will be loaded at
base address 0x000040cc00000000
[1185,4071294784:02:55:16.750188] VALIDATION SKIPPED.
[1185,4071294784:02:55:16.750644] VALIDATION SKIPPED.
[1185,4071065344:02:55:16.925423] NaClHostDescOpen: file type 0x21b6, not
regular
** Signal 11 from untrusted code: pc=40cc01edbf84
I can repro this locally; it reproes 100% of the runs. It only happens in
release mode and only for NaCl. I debugged this by adding debug prints like
here:
https://codereview.chromium.org/159653005/
What happens:
- Parser::ReportInvalidPreparseData is called
- It constructs Vector<const char*> for the arguments. Its length is sane
(1).
- And passes it to ParserBase::ReportMessage.
- But now, the length of the vector is insane (some arbitrary number,
varies between runs).
More information:
- Doing something that requires the address of the vector, e.g., printing
out the address of the vector in Parser::ReportInvalidPreparseData or in
ParserBase::ReportMessage, makes the bug go away. (Now 100% of the runs
pass.)
- Theory: The vector is not really created, only stored in registers,
unless we really need its address for something. And then passing it as
param fails.
- I'm using pepper version 32.
- I'm running the test like this: tools/run-tests.py -j28 --arch=nacl_x64
--mode=release --report --no-presubmit --command-prefix tools/nacl-run.py
cctest/test-api/PreCompileInvalidPreparseDataError
- nacl_run.py runs this command line:
/myhome/nacl_sdk/pepper_32/tools/sel_ldr_x86_64 -c -c -a -B
/myhome/nacl_sdk/pepper_32/tools/irt_core_x86_64.nexe --
/myhome/nacl_sdk/pepper_32/toolchain/linux_x86_glibc/x86_64-nacl/lib64/runnable-ld.so
--library-path
/myhome/nacl_sdk/pepper_32/toolchain/linux_x86_glibc/x86_64-nacl/lib64 "/media/ssdvol/v8-bleeding-edge/out/nacl_x64.release/cctest"
--nocrankshaft "test-api/PreCompileInvalidPreparseDataError"
--nobreak-on-abort --nodead-code-elimination
--nofold-constants "--testing_serialization_file=/media/ssdvol/v8-bleeding-edge/out/.serdes/serdes_PreCompileInvalidPreparseDataError__nocrankshaft"
Example printout with the debug prints:
ReportInvalidPreparseData
constructed args array, length is 1
ParserBase::ReportMessage invalid_preparser_data, args len 30643
ParserTraits::ReportMessageAt
message invalid_preparser_data, args len 30643
looping 0 bar
looping 1 (null)
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