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src/share/vm/prims/stackwalk.cpp
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@@ -35,46 +35,51 @@
#include "runtime/javaCalls.hpp"
#include "runtime/vframe.hpp"
#include "utilities/globalDefinitions.hpp"
// setup and cleanup actions
-void JavaFrameStream::setup_magic_on_entry(objArrayHandle frames_array) {
+void BaseFrameStream::setup_magic_on_entry(objArrayHandle frames_array) {
frames_array->obj_at_put(magic_pos, _thread->threadObj());
_anchor = address_value();
assert(check_magic(frames_array), "invalid magic");
}
-bool JavaFrameStream::check_magic(objArrayHandle frames_array) {
+bool BaseFrameStream::check_magic(objArrayHandle frames_array) {
oop m1 = frames_array->obj_at(magic_pos);
jlong m2 = _anchor;
if (m1 == _thread->threadObj() && m2 == address_value()) return true;
return false;
}
-bool JavaFrameStream::cleanup_magic_on_exit(objArrayHandle frames_array) {
+bool BaseFrameStream::cleanup_magic_on_exit(objArrayHandle frames_array) {
bool ok = check_magic(frames_array);
frames_array->obj_at_put(magic_pos, NULL);
_anchor = 0L;
return ok;
}
-// Returns JavaFrameStream for the current stack being traversed.
+JavaFrameStream::JavaFrameStream(JavaThread* thread, int mode)
+ : BaseFrameStream(thread), _vfst(thread) {
+ _need_method_info = StackWalk::need_method_info(mode);
+}
+
+// Returns the BaseFrameStream for the current stack being traversed.
//
// Parameters:
// thread Current Java thread.
// magic Magic value used for each stack walking
// frames_array User-supplied buffers. The 0th element is reserved
-// to this JavaFrameStream to use
+// for this BaseFrameStream to use
//
-JavaFrameStream* JavaFrameStream::from_current(JavaThread* thread, jlong magic,
+BaseFrameStream* BaseFrameStream::from_current(JavaThread* thread, jlong magic,
objArrayHandle frames_array)
{
assert(thread != NULL && thread->is_Java_thread(), "");
oop m1 = frames_array->obj_at(magic_pos);
if (m1 != thread->threadObj()) return NULL;
if (magic == 0L) return NULL;
- JavaFrameStream* stream = (JavaFrameStream*) (intptr_t) magic;
+ BaseFrameStream* stream = (BaseFrameStream*) (intptr_t) magic;
if (!stream->is_valid_in(thread, frames_array)) return NULL;
return stream;
}
// Unpacks one or more frames into user-supplied buffers.
@@ -83,22 +88,22 @@
// Do not call vfst.next to advance over the last returned value.
// In other words, do not leave any stale data in the vfst.
//
// Parameters:
// mode Restrict which frames to be decoded.
-// JavaFrameStream stream of javaVFrames
+// BaseFrameStream stream of frames
// max_nframes Maximum number of frames to be filled.
// start_index Start index to the user-supplied buffers.
// frames_array Buffer to store Class or StackFrame in, starting at start_index.
// frames array is a Class<?>[] array when only getting caller
// reference, and a StackFrameInfo[] array (or derivative)
// otherwise. It should never be null.
// end_index End index to the user-supplied buffers with unpacked frames.
//
// Returns the number of frames whose information was transferred into the buffers.
//
-int StackWalk::fill_in_frames(jlong mode, JavaFrameStream& stream,
+int StackWalk::fill_in_frames(jlong mode, BaseFrameStream& stream,
int max_nframes, int start_index,
objArrayHandle frames_array,
int& end_index, TRAPS) {
if (TraceStackWalk) {
tty->print_cr("fill_in_frames limit=%d start=%d frames length=%d",
@@ -108,11 +113,10 @@
assert(start_index + max_nframes <= frames_array->length(), "oob");
int frames_decoded = 0;
for (; !stream.at_end(); stream.next()) {
Method* method = stream.method();
- int bci = stream.bci();
if (method == NULL) continue;
// skip hidden frames for default StackWalker option (i.e. SHOW_HIDDEN_FRAMES
// not set) and when StackWalker::getCallerClass is called
@@ -127,39 +131,46 @@
}
int index = end_index++;
if (TraceStackWalk) {
tty->print(" %d: frame method: ", index); method->print_short_name();
- tty->print_cr(" bci=%d", bci);
+ tty->print_cr(" bci=%d", stream.bci());
}
- // fill in StackFrameInfo and initialize MemberName
- if (live_frame_info(mode)) {
- assert (use_frames_array(mode), "Bad mode for get live frame");
- Handle stackFrame(frames_array->obj_at(index));
- fill_live_stackframe(stackFrame, method, bci, stream.java_frame(), CHECK_0);
- } else if (need_method_info(mode)) {
- assert (use_frames_array(mode), "Bad mode for get stack frame");
- Handle stackFrame(frames_array->obj_at(index));
- fill_stackframe(stackFrame, method, bci);
- } else {
- assert (use_frames_array(mode) == false, "Bad mode for filling in Class object");
- if (get_caller_class(mode) && index == start_index && method->caller_sensitive()) {
+ if (!need_method_info(mode) && get_caller_class(mode) &&
+ index == start_index && method->caller_sensitive()) {
ResourceMark rm(THREAD);
THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(),
err_msg("StackWalker::getCallerClass called from @CallerSensitive %s method",
method->name_and_sig_as_C_string()));
}
-
- frames_array->obj_at_put(index, method->method_holder()->java_mirror());
- }
+ // fill in StackFrameInfo and initialize MemberName
+ stream.fill_frame(index, frames_array, method, CHECK_0);
if (++frames_decoded >= max_nframes) break;
}
return frames_decoded;
}
-static oop create_primitive_value_instance(StackValueCollection* values, int i, TRAPS) {
+// Fill in the LiveStackFrameInfo at the given index in frames_array
+void LiveFrameStream::fill_frame(int index, objArrayHandle frames_array,
+ const methodHandle& method, TRAPS) {
+ Handle stackFrame(THREAD, frames_array->obj_at(index));
+ fill_live_stackframe(stackFrame, method, CHECK);
+}
+
+// Fill in the StackFrameInfo at the given index in frames_array
+void JavaFrameStream::fill_frame(int index, objArrayHandle frames_array,
+ const methodHandle& method, TRAPS) {
+ if (_need_method_info) {
+ Handle stackFrame(THREAD, frames_array->obj_at(index));
+ fill_stackframe(stackFrame, method);
+ } else {
+ frames_array->obj_at_put(index, method->method_holder()->java_mirror());
+ }
+}
+
+oop LiveFrameStream::create_primitive_value_instance(StackValueCollection* values, int i, TRAPS) {
Klass* k = SystemDictionary::resolve_or_null(vmSymbols::java_lang_LiveStackFrameInfo(), CHECK_NULL);
instanceKlassHandle ik (THREAD, k);
JavaValue result(T_OBJECT);
JavaCallArguments args;
@@ -226,11 +237,11 @@
&args,
CHECK_NULL);
return (instanceOop) result.get_jobject();
}
-static objArrayHandle values_to_object_array(StackValueCollection* values, TRAPS) {
+objArrayHandle LiveFrameStream::values_to_object_array(StackValueCollection* values, TRAPS) {
objArrayHandle empty;
int length = values->size();
objArrayOop array_oop = oopFactory::new_objArray(SystemDictionary::Object_klass(),
length, CHECK_(empty));
objArrayHandle array_h(THREAD, array_oop);
@@ -241,11 +252,11 @@
array_h->obj_at_put(i, obj);
}
return array_h;
}
-static objArrayHandle monitors_to_object_array(GrowableArray<MonitorInfo*>* monitors, TRAPS) {
+objArrayHandle LiveFrameStream::monitors_to_object_array(GrowableArray<MonitorInfo*>* monitors, TRAPS) {
int length = monitors->length();
objArrayOop array_oop = oopFactory::new_objArray(SystemDictionary::Object_klass(),
length, CHECK_(objArrayHandle()));
objArrayHandle array_h(THREAD, array_oop);
for (int i = 0; i < length; i++) {
@@ -254,23 +265,23 @@
}
return array_h;
}
// Fill StackFrameInfo with declaringClass and bci and initialize memberName
-void StackWalk::fill_stackframe(Handle stackFrame, const methodHandle& method, int bci) {
+void BaseFrameStream::fill_stackframe(Handle stackFrame, const methodHandle& method) {
java_lang_StackFrameInfo::set_declaringClass(stackFrame(), method->method_holder()->java_mirror());
- java_lang_StackFrameInfo::set_method_and_bci(stackFrame(), method, bci);
+ java_lang_StackFrameInfo::set_method_and_bci(stackFrame(), method, bci());
}
// Fill LiveStackFrameInfo with locals, monitors, and expressions
-void StackWalk::fill_live_stackframe(Handle stackFrame, const methodHandle& method,
- int bci, javaVFrame* jvf, TRAPS) {
- fill_stackframe(stackFrame, method, bci);
- if (jvf != NULL) {
- StackValueCollection* locals = jvf->locals();
- StackValueCollection* expressions = jvf->expressions();
- GrowableArray<MonitorInfo*>* monitors = jvf->monitors();
+void LiveFrameStream::fill_live_stackframe(Handle stackFrame,
+ const methodHandle& method, TRAPS) {
+ fill_stackframe(stackFrame, method);
+ if (_jvf != NULL) {
+ StackValueCollection* locals = _jvf->locals();
+ StackValueCollection* expressions = _jvf->expressions();
+ GrowableArray<MonitorInfo*>* monitors = _jvf->monitors();
if (!locals->is_empty()) {
objArrayHandle locals_h = values_to_object_array(locals, CHECK);
java_lang_LiveStackFrameInfo::set_locals(stackFrame(), locals_h());
}
@@ -313,19 +324,30 @@
if (frames_array.is_null()) {
THROW_MSG_(vmSymbols::java_lang_NullPointerException(), "frames_array is NULL", NULL);
}
- Klass* stackWalker_klass = SystemDictionary::StackWalker_klass();
- Klass* abstractStackWalker_klass = SystemDictionary::AbstractStackWalker_klass();
+ // Setup traversal onto my stack.
+ if (live_frame_info(mode)) {
+ assert (use_frames_array(mode), "Bad mode for get live frame");
+ RegisterMap regMap(jt, true);
+ LiveFrameStream stream(jt, ®Map);
+ return fetchFirstBatch(stream, stackStream, mode, skip_frames, frame_count, start_index, frames_array, CHECK_NULL);
+ } else {
+ JavaFrameStream stream(jt, mode);
+ return fetchFirstBatch(stream, stackStream, mode, skip_frames, frame_count, start_index, frames_array, CHECK_NULL);
+ }
+}
+oop StackWalk::fetchFirstBatch(BaseFrameStream& stream, Handle stackStream,
+ jlong mode, int skip_frames, int frame_count,
+ int start_index, objArrayHandle frames_array, TRAPS) {
methodHandle m_doStackWalk(THREAD, Universe::do_stack_walk_method());
- // Setup traversal onto my stack.
- RegisterMap regMap(jt, true);
- JavaFrameStream stream(jt, ®Map);
{
+ Klass* stackWalker_klass = SystemDictionary::StackWalker_klass();
+ Klass* abstractStackWalker_klass = SystemDictionary::AbstractStackWalker_klass();
while (!stream.at_end()) {
InstanceKlass* ik = stream.method()->method_holder();
if (ik != stackWalker_klass &&
ik != abstractStackWalker_klass && ik->super() != abstractStackWalker_klass) {
break;
@@ -339,14 +361,11 @@
// stack frame has been traversed individually and resume stack walk
// from the stack frame at depth == skip_frames.
for (int n=0; n < skip_frames && !stream.at_end(); stream.next(), n++) {
if (TraceStackWalk) {
- tty->print(" skip "); stream.method()->print_short_name();
- tty->print_cr(" frame id: " PTR_FORMAT " pc: " PTR_FORMAT,
- p2i(stream.java_frame()->fr().id()),
- p2i(stream.java_frame()->fr().pc()));
+ tty->print(" skip "); stream.method()->print_short_name(); tty->cr();
}
}
}
int end_index = start_index;
@@ -400,38 +419,38 @@
// start_index Start index to the user-supplied buffers.
// frames_array Buffer to store StackFrame in, starting at start_index.
//
// Returns the end index of frame filled in the buffer.
//
-jint StackWalk::moreFrames(Handle stackStream, jlong mode, jlong magic,
+jint StackWalk::fetchNextBatch(Handle stackStream, jlong mode, jlong magic,
int frame_count, int start_index,
objArrayHandle frames_array,
TRAPS)
{
JavaThread* jt = (JavaThread*)THREAD;
- JavaFrameStream* existing_stream = JavaFrameStream::from_current(jt, magic, frames_array);
+ BaseFrameStream* existing_stream = BaseFrameStream::from_current(jt, magic, frames_array);
if (existing_stream == NULL) {
THROW_MSG_(vmSymbols::java_lang_InternalError(), "doStackWalk: corrupted buffers", 0L);
}
if (frames_array.is_null()) {
THROW_MSG_(vmSymbols::java_lang_NullPointerException(), "frames_array is NULL", 0L);
}
if (TraceStackWalk) {
- tty->print_cr("StackWalk::moreFrames frame_count %d existing_stream " PTR_FORMAT " start %d frames %d",
+ tty->print_cr("StackWalk::fetchNextBatch frame_count %d existing_stream " PTR_FORMAT " start %d frames %d",
frame_count, p2i(existing_stream), start_index, frames_array->length());
}
int end_index = start_index;
if (frame_count <= 0) {
return end_index; // No operation.
}
int count = frame_count + start_index;
assert (frames_array->length() >= count, "not enough space in buffers");
- JavaFrameStream& stream = (*existing_stream);
+ BaseFrameStream& stream = (*existing_stream);
if (!stream.at_end()) {
stream.next(); // advance past the last frame decoded in previous batch
if (!stream.at_end()) {
int n = fill_in_frames(mode, stream, frame_count, start_index,
frames_array, end_index, CHECK_0);
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