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8319876: Reduce memory consumption of VM_ThreadDump::doit #4006

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8319876: Reduce memory consumption of VM_ThreadDump::doit #4006

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backport of 8ec6b8de3bb3d7aeebdcb45d761b18cce3bab75e
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@elifaslan1
elifaslan1 committed Sep 30, 2025
commit adef3e3e4b47435d9eae2575b569b54b193e2b14
2 changes: 0 additions & 2 deletions src/hotspot/share/runtime/vmOperations.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -229,7 +229,6 @@ VM_ThreadDump::VM_ThreadDump(ThreadDumpResult* result,
_result = result;
_num_threads = 0; // 0 indicates all threads
_threads = NULL;
_result = result;
_max_depth = max_depth;
_with_locked_monitors = with_locked_monitors;
_with_locked_synchronizers = with_locked_synchronizers;
Expand All @@ -244,7 +243,6 @@ VM_ThreadDump::VM_ThreadDump(ThreadDumpResult* result,
_result = result;
_num_threads = num_threads;
_threads = threads;
_result = result;
_max_depth = max_depth;
_with_locked_monitors = with_locked_monitors;
_with_locked_synchronizers = with_locked_synchronizers;
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1 change: 1 addition & 0 deletions src/hotspot/share/services/threadService.cpp
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Expand Up @@ -673,6 +673,7 @@ void ThreadStackTrace::dump_stack_at_safepoint(int maxDepth) {

if (_thread->has_last_Java_frame()) {
RegisterMap reg_map(_thread);
ResourceMark rm;
vframe* start_vf = _thread->last_java_vframe(&reg_map);
int count = 0;
for (vframe* f = start_vf; f; f = f->sender() ) {
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