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  1. JDK
  2. JDK-8260709

C2: assert(false) failed: unscheduable graph

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    • Subcomponent:
    • Introduced In Build:
      b31
    • Introduced In Version:
      16
    • Resolved In Build:
      b00

      Backports

        Description

        The attached fuzzer test starts to fail after JDK-8258393 with the following assertion:

        To reproduce (could only reproduce it with the replay file):
        java -Xmx1G -XX:+ReplayCompiles -XX:ReplayDataFile=replay_pid5517.log -XX:+ReplayIgnoreInitErrors

        #
        # A fatal error has been detected by the Java Runtime Environment:
        #
        # Internal Error (/opt/mach5/mesos/work_dir/slaves/983c483a-6907-44e0-ad29-98c7183575e2-S14607/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/eb38ced5-f547-47f5-8cdb-5f862460886e/runs/be7bd1d1-1006-4697-88a2-7187c1776884/workspace/open/src/hotspot/share/opto/gcm.cpp:276), pid=5517, tid=5544
        # assert(false) failed: unscheduable graph
        #
        # JRE version: Java(TM) SE Runtime Environment (16.0+34) (fastdebug build 16-ea+34-2216)
        # Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug 16-ea+34-2216, mixed mode, sharing, tiered, compressed oops, g1 gc, linux-amd64)
        # Problematic frame:
        # V [libjvm.so+0xd101b2] assert_dom(Block*, Block*, Node*, PhaseCFG const*)+0x1b2
        ..........
        Command Line: -Xmx1G Test
        ..........
        Current thread (0x00007fe54c494520): JavaThread "C2 CompilerThread0" daemon [_thread_in_native, id=5544, stack(0x00007fe51b6ff000,0x00007fe51b800000)]


        Current CompileTask:
        C2: 6110 271 4 Test::mainTest (768 bytes)

        Stack: [0x00007fe51b6ff000,0x00007fe51b800000], sp=0x00007fe51b7fadb0, free space=1007k
        Native frames: (J=compiled Java code, A=aot compiled Java code, j=interpreted, Vv=VM code, C=native code)
        V [libjvm.so+0xd101b2] assert_dom(Block*, Block*, Node*, PhaseCFG const*)+0x1b2
        V [libjvm.so+0xd11928] PhaseCFG::schedule_early(VectorSet&, Node_Stack&)+0x588
        V [libjvm.so+0xd1a561] PhaseCFG::global_code_motion()+0x281
        V [libjvm.so+0xd1e5f1] PhaseCFG::do_global_code_motion()+0x51
        V [libjvm.so+0xa0eb40] Compile::Code_Gen()+0x290
        V [libjvm.so+0xa19b77] Compile::Compile(ciEnv*, ciMethod*, int, bool, bool, bool, bool, DirectiveSet*)+0x1917
        V [libjvm.so+0x849c2c] C2Compiler::compile_method(ciEnv*, ciMethod*, int, bool, DirectiveSet*)+0x1dc
        V [libjvm.so+0xa298e8] CompileBroker::invoke_compiler_on_method(CompileTask*)+0xe88
        V [libjvm.so+0xa2a538] CompileBroker::compiler_thread_loop()+0x5a8
        V [libjvm.so+0x18bb1e6] JavaThread::thread_main_inner()+0x256
        V [libjvm.so+0x18c1b60] Thread::call_run()+0x100
        V [libjvm.so+0x15a39b6] thread_native_entry(Thread*)+0x116

        Other failure mode:
        # Internal Error (/oracle/valhalla/open/src/hotspot/share/opto/gcm.cpp:744), pid=610421, tid=610439
        # assert(!LCA_orig->dominates(pred_block) || early->dominates(pred_block)) failed: early is high enough

          Attachments

          1. FuzzerUtils.java
            13 kB
          2. hs_err_pid5517.log
            179 kB
          3. replay_pid5517.log
            193 kB
          4. Test.java
            7 kB

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                Assignee:
                roland Roland Westrelin
                Reporter:
                chagedorn Christian Hagedorn
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                  Dates

                  Created:
                  Updated:
                  Resolved: