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  1. Core Server
  2. SERVER-35646

MozJSImplScope::buildStackString() segfaults when using clang-6.0

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    • Type: Icon: Bug Bug
    • Resolution: Gone away
    • Priority: Icon: Major - P3 Major - P3
    • None
    • Affects Version/s: None
    • Component/s: Build, JavaScript
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      # Compile the mongo shell using clang-6.0. This line was adapted from the "compile_flags" expansion
# of the Enterprise Ubuntu 18.04 (System clang 6.0 C++17 libc++ DEBUG) builder. Note that neither
# --libc++ nor --cxx-std=17 are necessary to make the mongo shell segfault when the
# MozJSImplScope::buildStackString() function is called.
/opt/mongodbtoolchain/v2/bin/python2 buildscripts/scons.py --dbg=on --opt=on --ssl -j$(grep -c ^processor /proc/cpuinfo) CC=clang-6.0 CXX=clang++-6.0 --disable-warnings-as-errors --allocator=system CPPDEFINES=_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR CXXFLAGS="-Wno-register" mongo

# Run the mongodb-javascript-stack GDB command.
/opt/mongodbtoolchain/v2/bin/python2 buildscripts/hang_analyzer.py
      Show
      # Compile the mongo shell using clang-6.0. This line was adapted from the "compile_flags" expansion # of the Enterprise Ubuntu 18.04 (System clang 6.0 C++17 libc++ DEBUG) builder. Note that neither # --libc++ nor --cxx-std=17 are necessary to make the mongo shell segfault when the # MozJSImplScope::buildStackString() function is called. /opt/mongodbtoolchain/v2/bin/python2 buildscripts/scons.py --dbg=on --opt=on --ssl -j$(grep -c ^processor /proc/cpuinfo) CC=clang-6.0 CXX=clang++-6.0 --disable-warnings-as-errors --allocator=system CPPDEFINES=_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR CXXFLAGS="-Wno-register" mongo # Run the mongodb-javascript-stack GDB command. /opt/mongodbtoolchain/v2/bin/python2 buildscripts/hang_analyzer.py
    • Dev Tools 2018-12-31, Dev Tools 2019-01-14, Dev Tools 2019-01-28, Dev Tools 2019-02-11
    • 45

      The MozJSImplScope::buildStackString() function is used to make the hang_analyzer.py script log the JavaScript stacktrace at the time the test has hung. We shouldn't upgrade the MongoDB toolchain to clang-6.0 if it is going to reduce the diagnostics that are available to a Server engineer when an Evergreen task times out.

      [JSTest:0] 2018-06-16T17:57:06.460+0000 2018-06-16T17:57:06.460+0000 F -        [js] Invalid access at address: 0x8528
[JSTest:0] 2018-06-16T17:57:06.464+0000 2018-06-16T17:57:06.464+0000 F -        [js] Got signal: 11 (Segmentation fault).
[JSTest:0] 2018-06-16T17:57:06.464+0000  0x5632e1bd2378 0x5632e1bd1ebb 0x7fcaec17d890 0x5632e139b7b4 0x5632e136cc7d 0x5632e0fda03f 0x5632e0ff6de4 0x5632e0fe9856 0x7fcae9016caf
[JSTest:0] 2018-06-16T17:57:06.464+0000 ----- BEGIN BACKTRACE -----
[JSTest:0] 2018-06-16T17:57:06.464+0000 {"backtrace":[{"b":"5632E08D1000","o":"1301378","s":"_ZN5mongo15printStackTraceERNSt3__113basic_ostreamIcNS0_11char_traitsIcEEEE"},{"b":"5632E08D1000","o":"1300EBB"},{"b":"7FCAEC16B000","o":"12890"},{"b":"5632E08D1000","o":"ACA7B4","s":"_ZN2js18IsAtomsCompartmentEP13JSCompartment"},{"b":"5632E08D1000","o":"A9BC7D","s":"_Z22JS_GetPendingExceptionP9JSContextN2JS13MutableHandleINS1_5ValueEEE"},{"b":"5632E08D1000","o":"70903F","s":"_ZN5mongo5mozjs23throwCurrentJSExceptionEP9JSContextNS_10ErrorCodes5ErrorENS_10StringDataE"},{"b":"5632E08D1000","o":"725DE4","s":"_ZN5mongo5mozjs15JSStringWrapperC1EP9JSContextP8JSString"},{"b":"5632E08D1000","o":"718856","s":"_ZN5mongo5mozjs14MozJSImplScope16buildStackStringEv"},{"b":"0","o":"7FCAE9016CAF"}],"processInfo":{ "mongodbVersion" : "4.1.0-365-g6fb6f415d0", "gitVersion" : "6fb6f415d02017e6588e4a8206de41cc8756f52e", "compiledModules" : [ "enterprise" ], "uname" : { "sysname" : "Linux", "release" : "4.15.0-1007-aws", "version" : "#7-Ubuntu SMP Tue Apr 24 10:56:17 UTC 2018", "machine" : "x86_64" }, "somap" : [ { "b" : "5632E08D1000", "elfType" : 3, "buildId" : "0E3EEBD618CB24BD1194B4CB90094C9C50BE8221" }, { "b" : "7FFCD26BE000", "path" : "linux-vdso.so.1", "elfType" : 3, "buildId" : "59A6FE5AA4F091833EB2933E0A94376880391E63" }, { "b" : "7FCAEDB3C000", "path" : "/usr/lib/x86_64-linux-gnu/libsasl2.so.2", "elfType" : 3, "buildId" : "ABB7E3F40302E6509DAD1F91DFB1F04B6A5FD072" }, { "b" : "7FCAED79E000", "path" : "/lib/x86_64-linux-gnu/libm.so.6", "elfType" : 3, "buildId" : "A33761AB8FB485311B3C85BF4253099D7CABE653" }, { "b" : "7FCAED583000", "path" : "/lib/x86_64-linux-gnu/libresolv.so.2", "elfType" : 3, "buildId" : "390E9CC4C215314B6D8ADE6D6E28F8518418039C" }, { "b" : "7FCAED10B000", "path" : "/usr/lib/x86_64-linux-gnu/libcrypto.so.1.1", "elfType" : 3, "buildId" : "95C6AB96CFE61B3B896F617C963E75A1ABAA99AC" }, { "b" : "7FCAECEA1000", "path" : "/usr/lib/x86_64-linux-gnu/libssl.so.1.1", "elfType" : 3, "buildId" : "9787FF1FFFE8D82268D89F6BFA3AF07B3E9D140F" }, { "b" : "7FCAECC9D000", "path" : "/lib/x86_64-linux-gnu/libdl.so.2", "elfType" : 3, "buildId" : "25AD56E902E23B490A9CCDB08A9744D89CB95BCC" }, { "b" : "7FCAECA95000", "path" : "/lib/x86_64-linux-gnu/librt.so.1", "elfType" : 3, "buildId" : "9826FBDF57ED7D6965131074CB3C08B1009C1CD8" }, { "b" : "7FCAEC7D2000", "path" : "/usr/lib/x86_64-linux-gnu/libc++.so.1", "elfType" : 3 }, { "b" : "7FCAEC5A2000", "path" : "/usr/lib/x86_64-linux-gnu/libc++abi.so.1", "elfType" : 3 }, { "b" : "7FCAEC38A000", "path" : "/lib/x86_64-linux-gnu/libgcc_s.so.1", "elfType" : 3, "buildId" : "039AE85FEF075EC14FE3528762A0645C8CF73B29" }, { "b" : "7FCAEC16B000", "path" : "/lib/x86_64-linux-gnu/libpthread.so.0", "elfType" : 3, "buildId" : "28C6AADE70B2D40D1F0F3D0A1A0CAD1AB816448F" }, { "b" : "7FCAEBD7A000", "path" : "/lib/x86_64-linux-gnu/libc.so.6", "elfType" : 3, "buildId" : "B417C0BA7CC5CF06D1D1BED6652CEDB9253C60D0" }, { "b" : "7FCAEDD57000", "path" : "/lib64/ld-linux-x86-64.so.2", "elfType" : 3, "buildId" : "64DF1B961228382FE18684249ED800AB1DCEAAD4" } ] }}
[JSTest:0] 2018-06-16T17:57:06.464+0000  mongo(_ZN5mongo15printStackTraceERNSt3__113basic_ostreamIcNS0_11char_traitsIcEEEE+0x38) [0x5632e1bd2378]
[JSTest:0] 2018-06-16T17:57:06.465+0000  mongo(+0x1300EBB) [0x5632e1bd1ebb]
[JSTest:0] 2018-06-16T17:57:06.465+0000  libpthread.so.0(+0x12890) [0x7fcaec17d890]
[JSTest:0] 2018-06-16T17:57:06.465+0000  mongo(_ZN2js18IsAtomsCompartmentEP13JSCompartment+0x4) [0x5632e139b7b4]
[JSTest:0] 2018-06-16T17:57:06.465+0000  mongo(_Z22JS_GetPendingExceptionP9JSContextN2JS13MutableHandleINS1_5ValueEEE+0x2D) [0x5632e136cc7d]
[JSTest:0] 2018-06-16T17:57:06.465+0000  mongo(_ZN5mongo5mozjs23throwCurrentJSExceptionEP9JSContextNS_10ErrorCodes5ErrorENS_10StringDataE+0x4F) [0x5632e0fda03f]
[JSTest:0] 2018-06-16T17:57:06.465+0000  mongo(_ZN5mongo5mozjs15JSStringWrapperC1EP9JSContextP8JSString+0xA4) [0x5632e0ff6de4]
[JSTest:0] 2018-06-16T17:57:06.465+0000  mongo(_ZN5mongo5mozjs14MozJSImplScope16buildStackStringEv+0xD6) [0x5632e0fe9856]
[JSTest:0] 2018-06-16T17:57:06.465+0000  ??? [0x7fcae9016caf]
[JSTest:0] 2018-06-16T17:57:06.465+0000 -----  END BACKTRACE  -----

            Assignee:
            andrew.morrow@mongodb.com Andrew Morrow (Inactive)
            Reporter:
            max.hirschhorn@mongodb.com Max Hirschhorn
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              Created:
              Updated:
              Resolved: