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  1. JDK
  2. JDK-8269088

C2 fails with assert(!n->is_Store() && !n->is_LoadStore()) failed: no node with a side effect

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    • Subcomponent:
    • Resolved In Build:
      b30
    • Verification:
      Verified

      Backports

        Description

        Unpack the Fuzzer testcase from here:
          https://cr.openjdk.java.net/~shade/8269088/09634.tar.gz

        Run:

        $ linux-x86_64-server-fastdebug/images/jdk/bin/java -Xcomp -XX:CompileOnly=Test -XX:CompileCommand=quiet -XX:+UseSerialGC -Xmx256m Test
        ...

        #
        # A fatal error has been detected by the Java Runtime Environment:
        #
        # Internal Error (/home/shade/trunks/jdk/src/hotspot/share/opto/loopopts.cpp:1443), pid=792969, tid=792991
        # assert(!n->is_Store() && !n->is_LoadStore()) failed: no node with a side effect
        #
        # JRE version: OpenJDK Runtime Environment (18.0) (fastdebug build 18-internal+0-adhoc.shade.jdk)
        # Java VM: OpenJDK 64-Bit Server VM (fastdebug 18-internal+0-adhoc.shade.jdk, compiled mode, sharing, tiered, compressed oops, compressed class ptrs, serial gc, linux-amd64)
        # Problematic frame:
        # V [libjvm.so+0x12fd8a9] PhaseIdealLoop::try_sink_out_of_loop(Node*)+0xa69
        #
        # Core dump will be written. Default location: Core dumps may be processed with "/usr/share/apport/apport %p %s %c %d %P %E" (or dumping to /home/shade/trunks/jdk/build/linux-x86_64-server-fastdebug/test-support/jtreg_test_hotspot_jtreg_applications_fuzzer/scratch/22/core.792969)
        #
        # If you would like to submit a bug report, please visit:
        # https://bugreport.java.com/bugreport/crash.jsp
        #

        --------------- S U M M A R Y ------------

        Command Line: -XX:MaxRAMPercentage=0.78125 -Djava.io.tmpdir=/home/shade/trunks/jdk/build/linux-x86_64-server-fastdebug/test-support/jtreg_test_hotspot_jtreg_applications_fuzzer/tmp -Xcomp -XX:CompileOnly=Test -XX:CompileCommand=quiet -XX:+UseSerialGC -Xmx256m Test

        Host: shade-desktop, AMD Ryzen Threadripper 3970X 32-Core Processor, 64 cores, 125G, Ubuntu 20.04.2 LTS
        Time: Mon Jun 21 15:27:08 2021 CEST elapsed time: 0.559349 seconds (0d 0h 0m 0s)

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

        Current thread (0x00007f3b181248e0): JavaThread "C2 CompilerThread0" daemon [_thread_in_native, id=792991, stack(0x00007f3b1c133000,0x00007f3b1c234000)]


        Current CompileTask:
        C2: 559 20 !b 4 Test::mainTest (911 bytes)

        Stack: [0x00007f3b1c133000,0x00007f3b1c234000], sp=0x00007f3b1c22e150, free space=1004k
        Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
        V [libjvm.so+0x12fd8a9] PhaseIdealLoop::try_sink_out_of_loop(Node*)+0xa69
        V [libjvm.so+0x12fda5b] PhaseIdealLoop::split_if_with_blocks_post(Node*)+0x6b
        V [libjvm.so+0x12fe891] PhaseIdealLoop::split_if_with_blocks(VectorSet&, Node_Stack&)+0x201
        V [libjvm.so+0x12f0d4a] PhaseIdealLoop::build_and_optimize(LoopOptsMode)+0x12ca
        V [libjvm.so+0xa40b95] PhaseIdealLoop::optimize(PhaseIterGVN&, LoopOptsMode)+0x2d5
        V [libjvm.so+0xa3de9f] Compile::Optimize()+0x101f
        V [libjvm.so+0xa3f760] Compile::Compile(ciEnv*, ciMethod*, int, bool, bool, bool, bool, bool, DirectiveSet*)+0x12f0
        V [libjvm.so+0x872a56] C2Compiler::compile_method(ciEnv*, ciMethod*, int, bool, DirectiveSet*)+0x646
        V [libjvm.so+0xa511c9] CompileBroker::invoke_compiler_on_method(CompileTask*)+0xf19
        V [libjvm.so+0xa51f58] CompileBroker::compiler_thread_loop()+0x658
        V [libjvm.so+0x19e7e51] JavaThread::thread_main_inner()+0x281
        V [libjvm.so+0x19ef5c4] Thread::call_run()+0x104
        V [libjvm.so+0x15698fc] thread_native_entry(Thread*)+0x10c

        The assert seems to be added by JDK-8252372.

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                Assignee:
                roland Roland Westrelin
                Reporter:
                shade Aleksey Shipilev
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                  Updated:
                  Resolved: