SIGSEGV crash in Dictionary::lookup when profiling with Pyroscope

Hello：

We are experiencing intermittent JVM crashes (SIGSEGV) on a small number of container instances when using async-profiler via Pyroscope. The crash occurs in the native Dictionary::lookup function. Most containers run fine — only a few pods are affected, which suggests a possible race condition or memory corruption issue.

How Pyroscope is started: We enable CPU, ALLOC, and LOCK profiling simultaneously via the Pyroscope Java agent: java -javaagent:pyroscope.jar -Dpyroscope.application.name=*** -Dpyroscope.server.address=*** -Dpyroscope.profiler.event=CPU -Dpyroscope.profiler.alloc=4096k -Dpyroscope.profiler.lock=20ms -jar app.jar

Environment: OS: Linux (amd64), containerized (Kubernetes)

• JRE: Java(TM) SE Runtime Environment 17.0.10+11-LTS-240
• JVM: Java HotSpot(TM) 64-Bit Server VM (mixed mode, sharing, tiered, compressed oops, compressed class ptrs, G1 GC)
• async-profiler version: 4.5.0.0
• Pyroscope version: 2.9.1
• Container base image: <e.g., oracle/graalvm-ce:17, eclipse-temurin:17, etc.>

Crash details: A fatal error has been detected by the Java Runtime Environment: SIGSEGV (0xb) at pc=0x00007f3bf4e08965, pid=1, tid=596 JRE version: Java(TM) SE Runtime Environment (17.0.10+11) (build 17.0.10+11-LTS-240) Java VM: Java HotSpot(TM) 64-Bit Server VM (17.0.10+11-LTS-240, mixed mode, sharing, tiered, compressed oops, compressed class ptrs, g1 gc, linux-amd64) Problematic frame: C [libasyncProfiler-linux-x64-94af16d95b27e7e3346a51e8d43e744de92a62a3.so+0xd965] Dictionary::lookup(char const*, unsigned long)+0x65 An error report file with more information is saved as:

If you would like to submit a bug report, please visit: https://bugreport.java.com/bugreport/crash.jsp The crash happened outside the Java Virtual Machine in native code. See problematic frame for where to report the bug.

[error occurred during error reporting (), id 0xb, SIGSEGV (0xb) at pc=0x00007f44abbdabc7] [error occurred during error reporting (), id 0xb, SIGSEGV (0xb) at pc=0x00007f44abbdabc7] [error occurred during error reporting (), id 0xb, SIGSEGV (0xb) at pc=0x00007f44abbdabc7] [error occurred during error reporting (), id 0xb, SIGSEGV (0xb) at pc=0x00007f44abbdabc7] [error occurred during error reporting (), id 0xb, SIGSEGV (0xb) at pc=0x00007f44abbdabc7] [error occurred during error reporting (), id 0xb, SIGSEGV (0xb) at pc=0x00007f44abbdabc7]