RFR: 8342823: Ubsan: ciEnv.cpp:1614:65: runtime error: member call on null pointer of type 'struct CompileTask'

[Matthias Baesken]

When running with ubsanized binaries on Linux x86_64,
hs jtreg test compiler/startup/StartupOutput.java
showed this issue

jdk/src/hotspot/share/ci/ciEnv.cpp:1614:65: runtime error: member call on null pointer of type 'struct CompileTask'
    #0 0x7fcea0810117 in ciEnv::dump_replay_data_helper(outputStream*) src/hotspot/share/ci/ciEnv.cpp:1614
    #1 0x7fcea3123577 in VMError::report_and_die(int, char const*, char const*, __va_list_tag*, Thread*, unsigned char*, void*, void*, char const*, int, unsigned long) src/hotspot/share/utilities/vmError.cpp:1872
    #2 0x7fcea0c01499 in report_fatal(VMErrorType, char const*, int, char const*, ...) src/hotspot/share/utilities/debug.cpp:214
    #3 0x7fcea09e9d85 in RuntimeStub::new_runtime_stub(char const*, CodeBuffer*, short, int, OopMapSet*, bool, bool) src/hotspot/share/code/codeBlob.cpp:413
    #4 0x7fcea066da1d in Runtime1::generate_blob(BufferBlob*, C1StubId, char const*, bool, StubAssemblerCodeGenClosure*) src/hotspot/share/c1/c1_Runtime1.cpp:233
    #5 0x7fcea066dfb0 in Runtime1::generate_blob_for(BufferBlob*, C1StubId) src/hotspot/share/c1/c1_Runtime1.cpp:262
    #6 0x7fcea066dfb0 in Runtime1::initialize(BufferBlob*) src/hotspot/share/c1/c1_Runtime1.cpp:272
    #7 0x7fcea03d2be1 in Compiler::init_c1_runtime() src/hotspot/share/c1/c1_Compiler.cpp:53
    #8 0x7fcea03d2be1 in Compiler::initialize() src/hotspot/share/c1/c1_Compiler.cpp:74
    #9 0x7fcea0acc0c2 in CompileBroker::init_compiler_runtime() src/hotspot/share/compiler/compileBroker.cpp:1771
    #10 0x7fcea0ad9a3f in CompileBroker::compiler_thread_loop() src/hotspot/share/compiler/compileBroker.cpp:1913
    #11 0x7fcea161264a in JavaThread::thread_main_inner() src/hotspot/share/runtime/javaThread.cpp:759
    #12 0x7fcea2ec739a in Thread::call_run() src/hotspot/share/runtime/thread.cpp:234
    #13 0x7fcea251e1d2 in thread_native_entry src/hotspot/os/linux/os_linux.cpp:858
    #14 0x7fcea7c6c6e9 in start_thread (/lib64/libpthread.so.0+0xa6e9) (BuildId: 1b515766201d47a183932ba0c8c8bd0d9ee8755b)
    #15 0x7fcea730f58e in clone (/lib64/libc.so.6+0x11858e) (BuildId: 448a3ddd22596e1adb8fb3dec8921ed5b9d54dc2)

So a nullptr check should be better added .

-------------

Commit messages:
 - JDK-8342823

Changes: https://git.openjdk.org/jdk/pull/21684/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=21684&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8342823
  Stats: 3 lines in 1 file changed: 2 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/21684.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21684/head:pull/21684

PR: https://git.openjdk.org/jdk/pull/21684