8377395: serviceability/sa/TestJhsdbJstackMixedCore.java fails due to NPE because "because "this.cfa" is null"

Reviewed-by: cjplummer, kevinw

Author: YaSuenag

src/jdk.hotspot.agent/linux/native/libsaproc/libproc_impl.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2003, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -187,9 +187,8 @@ static bool fill_addr_info(lib_info* lib) {
   lib->exec_end = (uintptr_t)-1L;
   for (ph = phbuf, cnt = 0; cnt < ehdr.e_phnum; cnt++, ph++) {
     if (ph->p_type == PT_LOAD) {
-      uintptr_t unaligned_start = lib->base + ph->p_vaddr;
-      uintptr_t aligned_start = align_down(unaligned_start, ph->p_align);
-      uintptr_t aligned_end = align_up(unaligned_start + ph->p_memsz, ph->p_align);
+      uintptr_t aligned_start = lib->base + align_down(ph->p_vaddr, ph->p_align);
+      uintptr_t aligned_end = aligned_start + align_up(ph->p_memsz, ph->p_align);
       if ((lib->end == (uintptr_t)-1L) || (lib->end < aligned_end)) {
         lib->end = aligned_end;
       }

test/hotspot/jtreg/ProblemList.txt

@@ -140,7 +140,6 @@ serviceability/sa/TestJmapCore.java               8318754 macosx-aarch64
 serviceability/sa/TestJmapCoreMetaspace.java      8318754 macosx-aarch64
 
 serviceability/sa/ClhsdbThreadContext.java        8356704 windows-x64
-serviceability/sa/TestJhsdbJstackMixedCore.java   8377395 linux-x64
 
 serviceability/jvmti/stress/StackTrace/NotSuspended/GetStackTraceNotSuspendedStressTest.java 8315980 linux-all,windows-x64
 

test/hotspot/jtreg/serviceability/sa/TestJhsdbJstackMixedCore.java

@@ -37,7 +37,7 @@
 
 /**
  * @test
- * @bug 8374482 8376264 8376284
+ * @bug 8374482 8376264 8376284 8377395
  * @requires (os.family == "linux") & (vm.hasSA)
  * @requires os.arch == "amd64"
  * @library /test/lib
@@ -66,7 +66,7 @@ private static void runJstackMixed(String coreFileName) throws Exception {
 
         out.shouldContain("__restore_rt <signal trampoline>");
         out.shouldContain("Java_jdk_test_lib_apps_LingeredApp_crash");
-        out.shouldContain("* jdk.test.lib.apps.LingeredApp.crash()");
+        out.shouldContain("jdk.test.lib.apps.LingeredApp.crash()");
     }
 
     public static void main(String... args) throws Throwable {