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  1. JDK
  2. JDK-8247502

PhaseStringOpts crashes while optimising effectively dead code


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    • Resolved In Build:
    • Verification:
      Not verified



        The following test failed in the JDK15 CI:


        Here's a snippet from the log file:

        Test 30 parameters: tinv=0, tvis=4, inv=0, vis=0, Arepeats=true, BDrepeats=false, ABmix=false, retention: RUNTIME, anno2: TYPE,FIELD,METHOD,PARAMETER,CONSTRUCTOR,LOCAL_VARIABLE, src=src6
        Testing classfile: Test30
        MCODE: test, RuntimeVisibleTypeAnnotations: 4

        Test 31 parameters: tinv=2, tvis=0, inv=2, vis=0, Arepeats=true, BDrepeats=false, ABmix=false, retention: CLASS, anno2: TYPE,FIELD,METHOD,PARAMETER,CONSTRUCTOR,LOCAL_VARIAB
        # A fatal error has been detected by the Java Runtime Environment:
        # EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x00007ff83d58f1fd, pid=8788, tid=4020
        # JRE version: Java(TM) SE Runtime Environment (15.0+28) (build 15-ea+28-1379)
        # Java VM: Java HotSpot(TM) 64-Bit Server VM (15-ea+28-1379, mixed mode, tiered, compressed oops, g1 gc, windows-amd64)
        # Problematic frame:
        # V [jvm.dll+0x6bf1fd] PhaseStringOpts::replace_string_concat+0x12bd
        # Core dump will be written. Default location: T:\\testoutput\\test-support\\jtreg_open_test_langtools_tier1\\scratch\\2\\hs_err_pid8788.mdmp
        # An error report file with more information is saved as:
        # T:\\testoutput\\test-support\\jtreg_open_test_langtools_tier1\\scratch\\2\\hs_err_pid8788.log
        # Compiler replay data is saved as:
        # T:\\testoutput\\test-support\\jtreg_open_test_langtools_tier1\\scratch\\2\\replay_pid8788.log
        # If you would like to submit a bug report, please visit:
        # https://bugreport.java.com/bugreport/crash.jsp
        result: Error. Agent communication error: java.net.SocketException: Connection reset; check console log for any additional details

        test result: Error. Agent communication error: java.net.SocketException: Connection reset; check console log for any additional details

        Here's the crashing thread's stack:

        --------------- T H R E A D ---------------

        Current thread (0x00000240b9513060): JavaThread "C2 CompilerThread2" daemon [_thread_in_native, id=4020, stack(0x000000b6a1400000,0x000000b6a1500000)]

        Current CompileTask:
        C2: 265338 18627 4 com.sun.tools.javac.main.Arguments::processArgs (46 bytes)

        Stack: [0x000000b6a1400000,0x000000b6a1500000], sp=0x000000b6a14facc0, free space=1003k
        Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
        V [jvm.dll+0x6bf1fd] PhaseStringOpts::replace_string_concat+0x12bd (stringopts.cpp:1832)
        V [jvm.dll+0x6b96b0] PhaseStringOpts::PhaseStringOpts+0x4f0 (stringopts.cpp:667)
        V [jvm.dll+0x1f1b56] Compile::inline_string_calls+0x106 (compile.cpp:1826)
        V [jvm.dll+0x1f14d5] Compile::inline_incrementally+0x455 (compile.cpp:1956)
        V [jvm.dll+0x1eb0e3] Compile::Optimize+0x243 (compile.cpp:2048)
        V [jvm.dll+0x1e8e17] Compile::Compile+0xd17 (compile.cpp:738)
        V [jvm.dll+0x177d97] C2Compiler::compile_method+0xc7 (c2compiler.cpp:115)
        V [jvm.dll+0x1f8865] CompileBroker::invoke_compiler_on_method+0x765 (compileBroker.cpp:2223)
        V [jvm.dll+0x1f690c] CompileBroker::compiler_thread_loop+0x28c (compileBroker.cpp:1900)
        V [jvm.dll+0x742fad] JavaThread::run+0x12d (thread.cpp:1946)
        V [jvm.dll+0x73bdba] Thread::call_run+0x8a (thread.cpp:403)
        V [jvm.dll+0x628086] thread_native_entry+0xd6 (os_windows.cpp:466)
        C [ucrtbase.dll+0x1f4a0]
        C [KERNEL32.DLL+0x84d4]
        C [ntdll.dll+0x6e8b1]

        Since this is a Tier1 failure, I'm starting this bug off
        as a P2 for initial triage.


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                • Assignee:
                  vlivanov Vladimir Ivanov
                  dcubed Daniel Daugherty
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