本文整理汇总了C++中CollectedHeap::is_valid_method方法的典型用法代码示例。如果您正苦于以下问题：C++ CollectedHeap::is_valid_method方法的具体用法？C++ CollectedHeap::is_valid_method怎么用？C++ CollectedHeap::is_valid_method使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类CollectedHeap的用法示例。
在下文中一共展示了CollectedHeap::is_valid_method方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: forte_fill_call_trace_given_top
static void forte_fill_call_trace_given_top(JavaThread* thd,
ASGCT_CallTrace* trace,
int depth,
frame top_frame) {
NoHandleMark nhm;
frame initial_Java_frame;
methodOop method;
int bci;
int count;
count = 0;
assert(trace->frames != NULL, "trace->frames must be non-NULL");
bool fully_decipherable = find_initial_Java_frame(thd, &top_frame, &initial_Java_frame, &method, &bci);
// The frame might not be walkable but still recovered a method
// (e.g. an nmethod with no scope info for the pc
if (method == NULL) return;
CollectedHeap* ch = Universe::heap();
// The method is not stored GC safe so see if GC became active
// after we entered AsyncGetCallTrace() and before we try to
// use the methodOop.
// Yes, there is still a window after this check and before
// we use methodOop below, but we can't lock out GC so that
// has to be an acceptable risk.
if (!ch->is_valid_method(method)) {
trace->num_frames = ticks_GC_active; // -2
return;
}
// We got a Java frame however it isn't fully decipherable
// so it won't necessarily be safe to use it for the
// initial frame in the vframe stream.
if (!fully_decipherable) {
// Take whatever method the top-frame decoder managed to scrape up.
// We look further at the top frame only if non-safepoint
// debugging information is available.
count++;
trace->num_frames = count;
trace->frames[0].method_id = method->find_jmethod_id_or_null();
if (!method->is_native()) {
trace->frames[0].lineno = bci;
} else {
trace->frames[0].lineno = -3;
}
if (!initial_Java_frame.safe_for_sender(thd)) return;
RegisterMap map(thd, false);
initial_Java_frame = initial_Java_frame.sender(&map);
}
vframeStreamForte st(thd, initial_Java_frame, false);
for (; !st.at_end() && count < depth; st.forte_next(), count++) {
bci = st.bci();
method = st.method();
// The method is not stored GC safe so see if GC became active
// after we entered AsyncGetCallTrace() and before we try to
// use the methodOop.
// Yes, there is still a window after this check and before
// we use methodOop below, but we can't lock out GC so that
// has to be an acceptable risk.
if (!ch->is_valid_method(method)) {
// we throw away everything we've gathered in this sample since
// none of it is safe
trace->num_frames = ticks_GC_active; // -2
return;
}
trace->frames[count].method_id = method->find_jmethod_id_or_null();
if (!method->is_native()) {
trace->frames[count].lineno = bci;
} else {
trace->frames[count].lineno = -3;
}
}
trace->num_frames = count;
return;
}