JDK-8269746 : C2: assert(!in->is_CFG()) failed: CFG Node with no controlling input?
- Type: Bug
- Component: hotspot
- Sub-Component: compiler
- Affected Version: 17,18
- Priority: P3
- Status: Resolved
- Resolution: Fixed
- Submitted: 2021-07-01
- Updated: 2021-08-10
- Resolved: 2021-07-08
The Version table provides details related to the release that this issue/RFE will be addressed.
Unresolved : Release in which this issue/RFE will be addressed.
Resolved: Release in which this issue/RFE has been resolved.
Fixed : Release in which this issue/RFE has been fixed. The release containing this fix may be available for download as an Early Access Release or a General Availability Release.
To download the current JDK release, click here.
Unresolved : Release in which this issue/RFE will be addressed.
Resolved: Release in which this issue/RFE has been resolved.
Fixed : Release in which this issue/RFE has been fixed. The release containing this fix may be available for download as an Early Access Release or a General Availability Release.
To download the current JDK release, click here.
| JDK 17 | JDK 18 |
|---|---|
17 b31Fixed  |
18Fixed |
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Description
The attached Java Fuzzer test starts to fail after JDK-8264649 (but seems to just reveal an existing issue) with the following assertion failure: To reproduce: $ java -Xcomp -XX:-TieredCompilation -XX:CompileOnly=Test Test.java $ java -Xcomp -XX:-TieredCompilation -XX:CompileOnly=Reduced Reduced.java # # A fatal error has been detected by the Java Runtime Environment: # # Internal Error (/opt/mach5/mesos/work_dir/slaves/35546316-ed70-4084-8244-d672e7734fd1-S57035/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/41fc080c-d2db-43a6-87b0-daa1149175bc/runs/ea6bcc43-d159-4998-ab37-df1970ab9b47/workspace/open/src/hotspot/share/opto/loopnode.cpp:4763), pid=18026, tid=18040 # assert(!in->is_CFG()) failed: CFG Node with no controlling input? # # JRE version: Java(TM) SE Runtime Environment (17.0+28) (fastdebug build 17-ea+28-LTS-2534) # Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug 17-ea+28-LTS-2534, compiled mode, sharing, compressed oops, compressed class ptrs, g1 gc, linux-amd64) # Problematic frame: # V [libjvm.so+0x12fef24] PhaseIdealLoop::build_loop_early(VectorSet&, Node_List&, Node_Stack&)+0x6d4 ............ Command Line: -Xmx1G -Xcomp -Xbatch -XX:-TieredCompilation -XX:CompileOnly=Test -XX:CompileCommand=quiet Test ............ Current thread (0x00007fd65047fc40): JavaThread "C2 CompilerThread0" daemon [_thread_in_native, id=18040, stack(0x00007fd6443cb000,0x00007fd6444cc000)] Current CompileTask: C2: 309 8 % b Test::mainTest @ 229 (669 bytes) Stack: [0x00007fd6443cb000,0x00007fd6444cc000], sp=0x00007fd6444c6320, free space=1004k Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code) V [libjvm.so+0x12fef24] PhaseIdealLoop::build_loop_early(VectorSet&, Node_List&, Node_Stack&)+0x6d4 V [libjvm.so+0x130841a] PhaseIdealLoop::build_and_optimize(LoopOptsMode)+0x49a V [libjvm.so+0xa2b300] PhaseIdealLoop::verify(PhaseIterGVN&)+0x2f0 V [libjvm.so+0xa261a8] Compile::Optimize()+0x6d8 V [libjvm.so+0xa28b48] Compile::Compile(ciEnv*, ciMethod*, int, bool, bool, bool, bool, bool, DirectiveSet*)+0x1618 V [libjvm.so+0x849aa6] C2Compiler::compile_method(ciEnv*, ciMethod*, int, bool, DirectiveSet*)+0x646 V [libjvm.so+0xa397a9] CompileBroker::invoke_compiler_on_method(CompileTask*)+0xfb9 V [libjvm.so+0xa3a518] CompileBroker::compiler_thread_loop()+0x5a8 V [libjvm.so+0x18b8251] JavaThread::thread_main_inner()+0x271 V [libjvm.so+0x18bff70] Thread::call_run()+0x100 V [libjvm.so+0x158c7c4] thread_native_entry(Thread*)+0x104
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