Bug ID: JDK-8336726 C2: assert(!do_asserts || projs->fallthrough

JDK-8336726 : C2: assert(!do_asserts || projs->fallthrough_ioproj != nullptr) failed: must be found

Type: Bug
Component: hotspot
Sub-Component: compiler
Affected Version: 16,17,21,23,24

Priority: P3
Status: Resolved
Resolution: Fixed

Submitted: 2024-07-18
Updated: 2025-06-23
Resolved: 2024-10-14

Versions (Unresolved/Resolved/Fixed)

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.

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JDK 24
24 b20Fixed

Related Reports

Relates :	JDK-8230397 - [lworld] C2 compilation fails with assert(projs->fallthrough_proj != __null) failed: must be found
Relates :	JDK-8360035 - JDK 11 HotSpot C2 Compiler Crash in PhaseIterGVN with Infinite Loop Optimization
Relates :	JDK-8257211 - C2: Enable call devirtualization during post-parse phase

Description

Looks similar to JDK-8230397 (different projection though) that was fixed in Valhalla and assumed to be Valhalla specific.

Only seems to reproduce with replay file, and only on JDK22.0.1

Other versions are probably affected, but the replay file does not work with them. Once the bug is better understood, hopefully we can find a reproducer that triggers on other versions as well.

emanuel@emanuel-oracle:/oracle-work/triage/current$ /oracle-work/jdk-22.0.1/fastdebug/bin/java -XX:+ReplayCompiles -XX:+ReplayIgnoreInitErrors -XX:ReplayDataFile=replay_pid63846.log -XX:TypeProfileLevel=222
Resolving klass jdk/internal/reflect/Reflection at 153
Resolving klass jdk/internal/reflect/ReflectionFactory at 306
Resolving klass java/lang/Class$ReflectionData at 414
Resolving klass java/lang/PublicMethods$MethodList at 690
Resolving klass java/lang/Class$Atomic at 883
Resolving klass jdk/internal/reflect/ReflectionFactory$GetReflectionFactoryAction at 1040
Resolving klass java/util/Objects at 79
Resolving klass java/nio/charset/Charset at 84
Resolving klass sun/nio/cs/UTF_8 at 87
Resolving klass java/lang/StringCoding at 93
Resolving klass java/lang/Object at 4
Resolving klass java/lang/System at 18
Resolving klass java/io/PrintStream at 26
Resolving klass TypeConfusionAndErrorHandlingInPolymorphism$Cat at 7
Resolving klass TypeConfusionAndErrorHandlingInPolymorphism$Dog at 9
Resolving klass TypeConfusionAndErrorHandlingInPolymorphism$Animal at 11
Resolving klass java/lang/Object at 4
#
# A fatal error has been detected by the Java Runtime Environment:
#
#  Internal Error (/opt/mach5/mesos/work_dir/slaves/0db9c48f-6638-40d0-9a4b-bd9cc7533eb8-S9823/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/d7a39ecb-8e74-462f-9377-5fdd29fc3ad4/runs/e53d9f60-7204-454a-984d-c6ce345ab850/workspace/open/src/hotspot/share/opto/callnode.cpp:967), pid=299318, tid=299332
#  assert(!do_asserts || projs->fallthrough_ioproj != nullptr) failed: must be found
#
# JRE version: Java(TM) SE Runtime Environment (22.0.1+7) (fastdebug build 22.0.1+7-15)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug 22.0.1+7-15, mixed mode, sharing, tiered, compressed oops, compressed class ptrs, g1 gc, linux-amd64)
# Problematic frame:
# V  [libjvm.so+0x84fb81]  CallNode::extract_projections(CallProjections*, bool, bool)+0x6d1
#
# Core dump will be written. Default location: Core dumps may be processed with "/usr/share/apport/apport -p%p -s%s -c%c -d%d -P%P -u%u -g%g -- %E" (or dumping to /oracle-work/triage/current/core.299318)
#
# An error report file with more information is saved as:
# /oracle-work/triage/current/hs_err_pid299318.log
#
# If you would like to submit a bug report, please visit:
#   https://bugreport.java.com/bugreport/crash.jsp
#
Aborted (core dumped)


Current CompileTask:
C2:152    1   !b  4       TypeConfusionAndErrorHandlingInPolymorphism::main (75 bytes)

Stack: [0x00007fecc8707000,0x00007fecc8808000],  sp=0x00007fecc88031b0,  free space=1008k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
V  [libjvm.so+0x84fb81]  CallNode::extract_projections(CallProjections*, bool, bool)+0x6d1  (callnode.cpp:967)
V  [libjvm.so+0x843705]  CallGenerator::do_late_inline_helper()+0x425
V  [libjvm.so+0x9e8e74]  Compile::inline_incrementally_one()+0xd4
V  [libjvm.so+0x9e9748]  Compile::process_late_inline_calls_no_inline(PhaseIterGVN&)+0x78
V  [libjvm.so+0x9ec84e]  Compile::Optimize()+0xffe
V  [libjvm.so+0x9efd7b]  Compile::Compile(ciEnv*, ciMethod*, int, Options, DirectiveSet*)+0x1beb
V  [libjvm.so+0x83bbd7]  C2Compiler::compile_method(ciEnv*, ciMethod*, int, bool, DirectiveSet*)+0x1e7
V  [libjvm.so+0x9fb6ec]  CompileBroker::invoke_compiler_on_method(CompileTask*)+0x92c
V  [libjvm.so+0x9fc378]  CompileBroker::compiler_thread_loop()+0x468
V  [libjvm.so+0xeba3bc]  JavaThread::thread_main_inner()+0xcc
V  [libjvm.so+0x17a0de6]  Thread::call_run()+0xb6
V  [libjvm.so+0x14ab017]  thread_native_entry(Thread*)+0x127



PRODUCT:

emanuel@emanuel-oracle:/oracle-work/triage/current$ /oracle-work/jdk-22/bin/java -XX:+UnlockDiagnosticVMOptions -XX:+ReplayCompiles -XX:+ReplayIgnoreInitErrors -XX:ReplayDataFile=replay_pid63846.log -XX:TypeProfileLevel=222
java.lang.NoClassDefFoundError: jdk/internal/misc/MethodFinder
Error while parsing line 328 at position 41: constant pool length mismatch: wrong class files?

Error while parsing line 340 at position 56: constant pool length mismatch: wrong class files?

Warning: entry was unresolved in the replay data: java/lang/Throwable
Error while parsing line 352 at position 44: constant pool length mismatch: wrong class files?

Error while parsing line 363 at position 42: constant pool length mismatch: wrong class files?

Error while parsing line 371 at position 39: constant pool length mismatch: wrong class files?

Error while parsing line 430 at position 42: constant pool length mismatch: wrong class files?

Error while parsing line 436 at position 333: tag mismatch: wrong class files?

Error while parsing line 460 at position 48: constant pool length mismatch: wrong class files?

Error while parsing line 472 at position 450: tag mismatch: wrong class files?

Error while parsing line 473 at position 61: constant pool length mismatch: wrong class files?

Error while parsing line 518 at position 53: constant pool length mismatch: wrong class files?

Warning: entry was unresolved in the replay data: java/lang/Exception
Error while parsing line 577 at position 46: constant pool length mismatch: wrong class files?

Warning: entry was unresolved in the replay data: java/io/ObjectStreamField
Warning: entry was unresolved in the replay data: java/lang/LinkageError
Error while parsing line 644 at position 66: constant pool length mismatch: wrong class files?

Error while parsing line 657 at position 52: constant pool length mismatch: wrong class files?

Resolving klass java/lang/Object at 4
Resolving klass java/lang/System at 18
Resolving klass java/io/PrintStream at 26
Resolving klass TypeConfusionAndErrorHandlingInPolymorphism$Cat at 7
Resolving klass TypeConfusionAndErrorHandlingInPolymorphism$Dog at 9
Resolving klass TypeConfusionAndErrorHandlingInPolymorphism$Animal at 11
Resolving klass java/lang/Object at 4
#
# A fatal error has been detected by the Java Runtime Environment:
#
#  SIGSEGV (0xb) at pc=0x00007f1ee5159e9c, pid=302481, tid=302495
#
# JRE version: Java(TM) SE Runtime Environment (22.0+19) (build 22-ea+19-1460)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (22-ea+19-1460, mixed mode, sharing, tiered, compressed oops, compressed class ptrs, g1 gc, linux-amd64)
# Problematic frame:
# V  [libjvm.so+0x5b4e9c]  ciInstanceKlass::compute_transitive_interfaces()+0x24c
#
# Core dump will be written. Default location: Core dumps may be processed with "/usr/share/apport/apport -p%p -s%s -c%c -d%d -P%P -u%u -g%g -- %E" (or dumping to /oracle-work/triage/current/core.302481)
#
# An error report file with more information is saved as:
# /oracle-work/triage/current/hs_err_pid302481.log
#
# If you would like to submit a bug report, please visit:
#   https://bugreport.java.com/bugreport/crash.jsp
#
Aborted (core dumped)

Current CompileTask:
C2:94    1   !b  4       TypeConfusionAndErrorHandlingInPolymorphism::main (75 bytes)

Stack: [0x00007f1eaea51000,0x00007f1eaeb52000],  sp=0x00007f1eaeb4e950,  free space=1014k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
V  [libjvm.so+0x5b4e9c]  ciInstanceKlass::compute_transitive_interfaces()+0x24c
V  [libjvm.so+0x5b51a1]  ciInstanceKlass::transitive_interfaces() const+0x21
V  [libjvm.so+0xebc2f4]  TypePtr::InterfaceSet::eq(ciInstanceKlass*) const+0x14
V  [libjvm.so+0xec2223]  TypePtr::InterfaceSet::InterfaceSet(GrowableArray<ciInstanceKlass*>*)+0x1d3
V  [libjvm.so+0xec2315]  TypePtr::interfaces(ciKlass*&, bool, bool, bool, Type::InterfaceHandling)+0x65
V  [libjvm.so+0xec2689]  TypeOopPtr::make_from_klass_common(ciKlass*, bool, bool, Type::InterfaceHandling)+0xb9
V  [libjvm.so+0xd0ec5f]  Parse::do_get_xxx(Node*, ciField*, bool)+0x48f
V  [libjvm.so+0xd0f37a]  Parse::do_field_access(bool, bool)+0x15a
V  [libjvm.so+0xcfd6f0]  Parse::do_one_block()+0x210
V  [libjvm.so+0xcfdae5]  Parse::do_all_blocks()+0xe5
V  [libjvm.so+0xd001b5]  Parse::Parse(JVMState*, ciMethod*, float)+0x725
V  [libjvm.so+0x577b0b]  ParseGenerator::generate(JVMState*)+0x8b
V  [libjvm.so+0x64b5e6]  Compile::Compile(ciEnv*, ciMethod*, int, Options, DirectiveSet*)+0xd16
V  [libjvm.so+0x57690b]  C2Compiler::compile_method(ciEnv*, ciMethod*, int, bool, DirectiveSet*)+0x17b
V  [libjvm.so+0x65135e]  CompileBroker::invoke_compiler_on_method(CompileTask*)+0xa9e
V  [libjvm.so+0x654468]  CompileBroker::compiler_thread_loop()+0x4b8
V  [libjvm.so+0x8fd238]  JavaThread::thread_main_inner() [clone .part.0]+0xb8
V  [libjvm.so+0xea4588]  Thread::call_run()+0xa8
V  [libjvm.so+0xccb8ea]  thread_native_entry(Thread*)+0xda

Comments

Changeset: 8d0975a2 Branch: master Author: Tobias Hartmann <thartmann@openjdk.org> Date: 2024-10-14 05:26:48 +0000 URL: https://git.openjdk.org/jdk/commit/8d0975a27d826f7aa487a612131827586abaefd5
14-10-2024
A pull request was submitted for review. Branch: master URL: https://git.openjdk.org/jdk/pull/21450 Date: 2024-10-10 13:29:11 +0000
11-10-2024
Reproduces with JDK 23 and JDK 24 as well, just needs -XX:-AlwaysRecordEvolDependencies (otherwise we hit "assert(!_can_hotswap_or_post_breakpoint \|\| on) failed: sanity check"): java -XX:+UnlockDiagnosticVMOptions -XX:+ReplayCompiles -XX:+ReplayIgnoreInitErrors -XX:ReplayDataFile=replay_pid63846.log -XX:TypeProfileLevel=222 -XX:+UnlockExperimentalVMOptions -XX:-AlwaysRecordEvolDependencies # A fatal error has been detected by the Java Runtime Environment: # # Internal Error (/workspace/open/src/hotspot/share/opto/callnode.cpp:967), pid=3913531, tid=3913545 # assert(!do_asserts \|\| projs->fallthrough_ioproj != nullptr) failed: must be found # # JRE version: Java(TM) SE Runtime Environment (23.0.1+4) (fastdebug build 23.0.1+4-27) # Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug 23.0.1+4-27, mixed mode, sharing, tiered, compressed oops, compressed class ptrs, g1 gc, linux-amd64) # Problematic frame: # V [libjvm.so+0x855c21] CallNode::extract_projections(CallProjections*, bool, bool)+0x6d1 The SIGSEGV in ciInstanceKlass::compute_transitive_interfaces also reproduces with latest JDK 24 when using "-XX:+UnlockExperimentalVMOptions -XX:-AlwaysRecordEvolDependencies -XX:-ProfileExceptionHandlers". It looks like an issue with using a replay file from a debug build with a release build. I think it can be safely ignored.
10-10-2024
(rr) p this->dump(-1) 563 CallDynamicJava === 848 818 525 8 1 (88 1 785 28 1 88 789 ) [[ 564 565 566 576 ]] # Dynamic TypeConfusionAndErrorHandlingInPolymorphism$Animal::speak void ( java/lang/Object:NotNull * ) TypeConfusionAndErrorHandlingInPolymorphism::main @ bci:51 (line 23) !jvms: TypeConfusionAndErrorHandlingInPolymorphism::main @ bci:51 (line 23) 564 Proj === 563 [[ 569 ]] #0 !jvms: TypeConfusionAndErrorHandlingInPolymorphism::main @ bci:51 (line 23) 565 Proj === 563 [[ 574 569 95 657 ]] #1 (i_o_use) !orig=649 !jvms: TypeConfusionAndErrorHandlingInPolymorphism::main @ bci:51 (line 23) 566 Proj === 563 [[ 96 97 657 ]] #2 (i_o_use) Memory: @BotPTR +bot, idx=Bot; !orig=[650] !jvms: TypeConfusionAndErrorHandlingInPolymorphism::main @ bci:51 (line 23) 576 Proj === 563 [[ 648 643 ]] #2 Memory: @BotPTR +bot, idx=Bot; !orig=[607],[640] !jvms: TypeConfusionAndErrorHandlingInPolymorphism::main @ bci:51 (line 23) Seems to be an issue with post-parse call devirtualization (JDK-8257211), workaround is -XX:-IncrementalInlineVirtual The problem is that the fallthrough_ioproj (568 Proj) is missing. When the virtual call was created, it was still there but had no uses: 563 CallDynamicJava === 558 520 525 8 1 (562 1 63 524 1 ) [[ 564 565 566 568 575 576 ]] # Dynamic TypeConfusionAndErrorHandlingInPolymorphism$Animal::speak void ( java/lang/Object:NotNull * ) TypeConfusionAndErrorHandlingInPolymorphism::main @ bci:51 (line 23) !jvms: TypeConfusionAndErrorHandlingInPolymorphism::main @ bci:51 (line 23) 564 Proj === 563 [[ 569 ]] #0 !jvms: TypeConfusionAndErrorHandlingInPolymorphism::main @ bci:51 (line 23) 565 Proj === 563 [[ 574 569 573 ]] #1 (i_o_use) !jvms: TypeConfusionAndErrorHandlingInPolymorphism::main @ bci:51 (line 23) 566 Proj === 563 [[ 567 572 ]] #2 (i_o_use) Memory: @BotPTR +bot, idx=Bot; !jvms: TypeConfusionAndErrorHandlingInPolymorphism::main @ bci:51 (line 23) 568 Proj === 563 [[ ]] #1 (i_o_use) !jvms: TypeConfusionAndErrorHandlingInPolymorphism::main @ bci:51 (line 23) 575 Proj === 563 [[ 526 ]] #1 !jvms: TypeConfusionAndErrorHandlingInPolymorphism::main @ bci:51 (line 23) 576 Proj === 563 [[ 577 ]] #2 Memory: @BotPTR +bot, idx=Bot; !jvms: TypeConfusionAndErrorHandlingInPolymorphism::main @ bci:51 (line 23) I think the problem is that we have an endless loop after the call so IO is not used anymore and therefore the projection node is removed.
10-10-2024
Attached Test.java reproduces the issue since JDK-8257211 in JDK 16 b28 and with latest JDK 24: java -XX:-TieredCompilation -Xcomp -XX:CompileCommand=quiet -XX:CompileCommand=compileonly,Test::test Test.java
10-10-2024
ILW = Assert during C2 compilation, intermittent but reproducible with replay file, disable incremental inlining or compilation of affected method = HLM = P3
18-07-2024