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8034249: need more workarounds for suspend equivalent condition issue

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Collect data at safepoint, do not rely on thread suspension

Reviewed-by: dcubed, dholmes
This commit is contained in:
Serguei Spitsyn 2014-02-18 06:19:49 -08:00 • committed by Serguei Spitsyn
parent 43b711ea78
commit 95cdf53e75
2 changed files with 29 additions and 15 deletions
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24
hotspot/src/share/vm/prims/jvmtiEnv.cpp
View file

@ -1,5 +1,5 @@
/*
* Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2003, 2014, 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
@ -999,8 +999,9 @@ JvmtiEnv::GetOwnedMonitorInfo(JavaThread* java_thread, jint* owned_monitor_count
GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list =
new (ResourceObj::C_HEAP, mtInternal) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true);
uint32_t debug_bits = 0;
if (is_thread_fully_suspended(java_thread, true, &debug_bits)) {
// It is only safe to perform the direct operation on the current
// thread. All other usage needs to use a vm-safepoint-op for safety.
if (java_thread == calling_thread) {
err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list);
} else {
// JVMTI get monitors info at safepoint. Do not require target thread to
@ -1044,8 +1045,9 @@ JvmtiEnv::GetOwnedMonitorStackDepthInfo(JavaThread* java_thread, jint* monitor_i
GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list =
new (ResourceObj::C_HEAP, mtInternal) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true);
uint32_t debug_bits = 0;
if (is_thread_fully_suspended(java_thread, true, &debug_bits)) {
// It is only safe to perform the direct operation on the current
// thread. All other usage needs to use a vm-safepoint-op for safety.
if (java_thread == calling_thread) {
err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list);
} else {
// JVMTI get owned monitors info at safepoint. Do not require target thread to
@ -1086,9 +1088,11 @@ JvmtiEnv::GetOwnedMonitorStackDepthInfo(JavaThread* java_thread, jint* monitor_i
jvmtiError
JvmtiEnv::GetCurrentContendedMonitor(JavaThread* java_thread, jobject* monitor_ptr) {
jvmtiError err = JVMTI_ERROR_NONE;
uint32_t debug_bits = 0;
JavaThread* calling_thread = JavaThread::current();
if (is_thread_fully_suspended(java_thread, true, &debug_bits)) {
// It is only safe to perform the direct operation on the current
// thread. All other usage needs to use a vm-safepoint-op for safety.
if (java_thread == calling_thread) {
err = get_current_contended_monitor(calling_thread, java_thread, monitor_ptr);
} else {
// get contended monitor information at safepoint.
@ -1297,8 +1301,10 @@ JvmtiEnv::GetThreadGroupChildren(jthreadGroup group, jint* thread_count_ptr, jth
jvmtiError
JvmtiEnv::GetStackTrace(JavaThread* java_thread, jint start_depth, jint max_frame_count, jvmtiFrameInfo* frame_buffer, jint* count_ptr) {
jvmtiError err = JVMTI_ERROR_NONE;
uint32_t debug_bits = 0;
if (is_thread_fully_suspended(java_thread, true, &debug_bits)) {
// It is only safe to perform the direct operation on the current
// thread. All other usage needs to use a vm-safepoint-op for safety.
if (java_thread == JavaThread::current()) {
err = get_stack_trace(java_thread, start_depth, max_frame_count, frame_buffer, count_ptr);
} else {
// JVMTI get stack trace at safepoint. Do not require target thread to

12
hotspot/src/share/vm/prims/jvmtiEnvBase.hpp
View file

@ -1,5 +1,5 @@
/*
* Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2003, 2014, 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
@ -356,9 +356,13 @@ public:
}
VMOp_Type type() const { return VMOp_GetOwnedMonitorInfo; }
void doit() {
((JvmtiEnvBase *)_env)->get_owned_monitors(_calling_thread, _java_thread,
_result = JVMTI_ERROR_THREAD_NOT_ALIVE;
if (Threads::includes(_java_thread) && !_java_thread->is_exiting()
&& _java_thread->threadObj() != NULL) {
_result = ((JvmtiEnvBase *)_env)->get_owned_monitors(_calling_thread, _java_thread,
_owned_monitors_list);
}
}
jvmtiError result() { return _result; }
};
@ -439,10 +443,14 @@ public:
jvmtiError result() { return _result; }
VMOp_Type type() const { return VMOp_GetStackTrace; }
void doit() {
_result = JVMTI_ERROR_THREAD_NOT_ALIVE;
if (Threads::includes(_java_thread) && !_java_thread->is_exiting()
&& _java_thread->threadObj() != NULL) {
_result = ((JvmtiEnvBase *)_env)->get_stack_trace(_java_thread,
_start_depth, _max_count,
_frame_buffer, _count_ptr);
}
}
};
// forward declaration