void frame::describe_pd(FrameValues& values, int frame_no) {
for (int w = 0; w < frame::register_save_words; w++) {
values.describe(frame_no, sp() + w, err_msg("register save area word %d", w), 1);
}
if (is_ricochet_frame()) {
MethodHandles::RicochetFrame::describe(this, values, frame_no);
} else if (is_interpreted_frame()) {
DESCRIBE_FP_OFFSET(interpreter_frame_d_scratch_fp);
DESCRIBE_FP_OFFSET(interpreter_frame_l_scratch_fp);
DESCRIBE_FP_OFFSET(interpreter_frame_padding);
DESCRIBE_FP_OFFSET(interpreter_frame_oop_temp);
// esp, according to Lesp (e.g. not depending on bci), if seems valid
intptr_t* esp = *interpreter_frame_esp_addr();
if ((esp >= sp()) && (esp < fp())) {
values.describe(-1, esp, "*Lesp");
}
}
if (!is_compiled_frame()) {
if (frame::callee_aggregate_return_pointer_words != 0) {
values.describe(frame_no, sp() + frame::callee_aggregate_return_pointer_sp_offset, "callee_aggregate_return_pointer_word");
}
for (int w = 0; w < frame::callee_register_argument_save_area_words; w++) {
values.describe(frame_no, sp() + frame::callee_register_argument_save_area_sp_offset + w,
err_msg("callee_register_argument_save_area_words %d", w));
}
}
}
GrowableArray<MonitorInfo*>* javaVFrame::locked_monitors() {
assert(SafepointSynchronize::is_at_safepoint() || JavaThread::current() == thread(),
"must be at safepoint or it's a java frame of the current thread");
GrowableArray<MonitorInfo*>* mons = monitors();
GrowableArray<MonitorInfo*>* result = new GrowableArray<MonitorInfo*>(mons->length());
if (mons->is_empty()) return result;
bool found_first_monitor = false;
ObjectMonitor *pending_monitor = thread()->current_pending_monitor();
ObjectMonitor *waiting_monitor = thread()->current_waiting_monitor();
oop pending_obj = (pending_monitor != NULL ? (oop) pending_monitor->object() : (oop) NULL);
oop waiting_obj = (waiting_monitor != NULL ? (oop) waiting_monitor->object() : (oop) NULL);
for (int index = (mons->length()-1); index >= 0; index--) {
MonitorInfo* monitor = mons->at(index);
if (monitor->eliminated() && is_compiled_frame()) continue; // skip eliminated monitor
oop obj = monitor->owner();
if (obj == NULL) continue; // skip unowned monitor
//
// Skip the monitor that the thread is blocked to enter or waiting on
//
if (!found_first_monitor && (obj == pending_obj || obj == waiting_obj)) {
continue;
}
found_first_monitor = true;
result->append(monitor);
}
return result;
}
void javaVFrame::print() {
ResourceMark rm;
vframe::print();
tty->print("\t");
method()->print_value();
tty->cr();
tty->print_cr("\tbci: %d", bci());
print_stack_values("locals", locals());
print_stack_values("expressions", expressions());
GrowableArray<MonitorInfo*>* list = monitors();
if (list->is_empty()) return;
tty->print_cr("\tmonitor list:");
for (int index = (list->length()-1); index >= 0; index--) {
MonitorInfo* monitor = list->at(index);
tty->print("\t obj\t");
if (monitor->owner_is_scalar_replaced()) {
Klass* k = java_lang_Class::as_Klass(monitor->owner_klass());
tty->print("( is scalar replaced %s)", k->external_name());
} else if (monitor->owner() == NULL) {
tty->print("( null )");
} else {
monitor->owner()->print_value();
tty->print("(" INTPTR_FORMAT ")", (address)monitor->owner());
}
if (monitor->eliminated() && is_compiled_frame())
tty->print(" ( lock is eliminated )");
tty->cr();
tty->print("\t ");
monitor->lock()->print_on(tty);
tty->cr();
}
}
bool javaVFrame::structural_compare(javaVFrame* other) {
// Check static part
if (method() != other->method()) return false;
if (bci() != other->bci()) return false;
// Check locals
StackValueCollection *locs = locals();
StackValueCollection *other_locs = other->locals();
assert(locs->size() == other_locs->size(), "sanity check");
int i;
for(i = 0; i < locs->size(); i++) {
// it might happen the compiler reports a conflict and
// the interpreter reports a bogus int.
if ( is_compiled_frame() && locs->at(i)->type() == T_CONFLICT) continue;
if (other->is_compiled_frame() && other_locs->at(i)->type() == T_CONFLICT) continue;
if (!locs->at(i)->equal(other_locs->at(i)))
return false;
}
// Check expressions
StackValueCollection* exprs = expressions();
StackValueCollection* other_exprs = other->expressions();
assert(exprs->size() == other_exprs->size(), "sanity check");
for(i = 0; i < exprs->size(); i++) {
if (!exprs->at(i)->equal(other_exprs->at(i)))
return false;
}
return true;
}
void frame::follow_roots() {
if (is_interpreted_frame()) {
if (has_interpreted_float_marker() && follow_roots_interpreted_float_frame()) return;
// Follow the roots of the frame
for (oop* p = sp(); p <= temp_addr(0); p++) {
MarkSweep::follow_root(p);
}
MarkSweep::follow_root((oop*)hp_addr());
MarkSweep::follow_root(receiver_addr());
return;
}
if (is_compiled_frame()) {
if (has_compiled_float_marker() && follow_roots_compiled_float_frame()) return;
for (oop* p = sp(); p < (oop*)fp(); p++) MarkSweep::follow_root(p);
return;
}
if (is_entry_frame()) {
for (oop* p = sp(); p < (oop*)fp(); p++) MarkSweep::follow_root(p);
return;
}
if (is_deoptimized_frame()) {
// Expression stack
oop* end = (oop*)fp() + frame_real_sender_sp_offset;
for (oop* p = sp(); p < end; p++) MarkSweep::follow_root(p);
MarkSweep::follow_root((oop*)frame_array_addr());
return;
}
}
void frame::adjust_unextended_sp() {
// If we are returning to a compiled MethodHandle call site, the
// saved_fp will in fact be a saved value of the unextended SP. The
// simplest way to tell whether we are returning to such a call site
// is as follows:
if (is_compiled_frame() && false /*is_at_mh_callsite()*/) { // TODO PPC port
// If the sender PC is a deoptimization point, get the original
// PC. For MethodHandle call site the unextended_sp is stored in
// saved_fp.
_unextended_sp = _fp - _cb->frame_size();
#ifdef ASSERT
nmethod *sender_nm = _cb->as_nmethod_or_null();
assert(sender_nm && *_sp == *_unextended_sp, "backlink changed");
intptr_t* sp = _unextended_sp; // check if stack can be walked from here
for (int x = 0; x < 5; ++x) { // check up to a couple of backlinks
intptr_t* prev_sp = *(intptr_t**)sp;
if (prev_sp == 0) break; // end of stack
assert(prev_sp>sp, "broken stack");
sp = prev_sp;
}
if (sender_nm->is_deopt_mh_entry(_pc)) { // checks for deoptimization
address original_pc = sender_nm->get_original_pc(this);
assert(sender_nm->insts_contains(original_pc), "original PC must be in nmethod");
assert(sender_nm->is_method_handle_return(original_pc), "must be");
}
#endif
}
}
bool frame::should_be_deoptimized() const {
if (!is_compiled_frame()) return false;
nmethod* nm = code();
if (TraceApplyChange) {
std->print("checking (%s) ", nm->is_marked_for_deoptimization() ? "true" : "false");
nm->print_value_on(std);
std->cr();
}
return nm->is_marked_for_deoptimization();
}
intptr_t* frame::real_fp() const {
if (_cb != NULL) {
// use the frame size if valid
int size = _cb->frame_size();
if (size > 0) {
return unextended_sp() + size;
}
}
// else rely on fp()
assert(! is_compiled_frame(), "unknown compiled frame size");
return fp();
}
void frame::print() const {
std->print("[%s frame: fp = %#lx, sp = %#lx, pc = %#lx", print_name(), fp(), sp(), pc());
if (is_compiled_frame()) {
std->print(", nm = %#x", findNMethod(pc()));
} else if (is_interpreted_frame()) {
std->print(", hp = %#x, method = %#x", hp(), method());
}
std->print_cr("]");
if (PrintLongFrames) {
for (oop* p = sp(); p < (oop*)fp(); p++)
std->print_cr(" - 0x%lx: 0x%lx", p, *p);
}
}
void frame::oop_iterate(OopClosure* blk) {
if (is_interpreted_frame()) {
if (has_interpreted_float_marker() && oop_iterate_interpreted_float_frame(blk)) return;
// lprintf("Frame: fp = %#lx, sp = %#lx]\n", fp(), sp());
for (oop* p = sp(); p <= temp_addr(0); p++) {
// lprintf("\t[%#lx]: ", p);
// (*p)->short_print();
// lprintf("\n");
blk->do_oop(p);
}
// lprintf("\t{%#lx}: ", receiver_addr());
// (*receiver_addr())->short_print();
// lprintf("\n");
blk->do_oop(receiver_addr());
return;
}
if (is_compiled_frame()) {
if (has_compiled_float_marker() && oop_iterate_compiled_float_frame(blk)) return;
// All oops are [sp..fp[
for (oop* p = sp(); p < (oop*)fp(); p++) {
blk->do_oop(p);
}
return;
}
if (is_entry_frame()) {
// All oops are [sp..fp[
for (oop* p = sp(); p < (oop*)fp(); p++) {
blk->do_oop(p);
}
return;
}
if (is_deoptimized_frame()) {
// Expression stack
oop* end = (oop*)fp() + frame_real_sender_sp_offset;
// All oops are [sp..end[
for (oop* p = sp(); p < end; p++) {
blk->do_oop(p);
}
blk->do_oop((oop*)frame_array_addr());
return;
}
}
IC_Iterator* frame::current_ic_iterator() const {
if (is_interpreted_frame()) {
InterpretedIC* ic = current_interpretedIC();
if (ic && !Bytecodes::is_send_code(ic->send_code())) return NULL;
return ic ? new InterpretedIC_Iterator(ic) : NULL;
}
if (is_compiled_frame()) {
CompiledIC* ic = current_compiledIC();
return ic->inlineCache()
? new CompiledIC_Iterator(ic)
: NULL; // a perform, not a send
}
// entry or deoptimized frame
return NULL;
}
nmethod* frame::code() const {
assert(is_compiled_frame(), "no code");
return findNMethod(pc());
}
CompiledIC* frame::current_compiledIC() const {
return is_compiled_frame()
? CompiledIC_from_return_addr(pc()) // may fail if current frame isn't at a send -- caller must know
: NULL;
}
char* frame::print_name() const {
if (is_interpreted_frame()) return "interpreted";
if (is_compiled_frame()) return "compiled";
if (is_deoptimized_frame()) return "deoptimized";
return "C";
}
void javaVFrame::print_lock_info_on(outputStream* st, int frame_count) {
ResourceMark rm;
// If this is the first frame, and java.lang.Object.wait(...) then print out the receiver.
if (frame_count == 0) {
if (method()->name() == vmSymbols::wait_name() &&
method()->method_holder()->name() == vmSymbols::java_lang_Object()) {
StackValueCollection* locs = locals();
if (!locs->is_empty()) {
StackValue* sv = locs->at(0);
if (sv->type() == T_OBJECT) {
Handle o = locs->at(0)->get_obj();
print_locked_object_class_name(st, o, "waiting on");
}
}
} else if (thread()->current_park_blocker() != NULL) {
oop obj = thread()->current_park_blocker();
Klass* k = obj->klass();
st->print_cr("\t- %s <" INTPTR_FORMAT "> (a %s)", "parking to wait for ", (address)obj, k->external_name());
}
}
// Print out all monitors that we have locked or are trying to lock
GrowableArray<MonitorInfo*>* mons = monitors();
if (!mons->is_empty()) {
bool found_first_monitor = false;
for (int index = (mons->length()-1); index >= 0; index--) {
MonitorInfo* monitor = mons->at(index);
if (monitor->eliminated() && is_compiled_frame()) { // Eliminated in compiled code
if (monitor->owner_is_scalar_replaced()) {
Klass* k = java_lang_Class::as_Klass(monitor->owner_klass());
st->print("\t- eliminated <owner is scalar replaced> (a %s)", k->external_name());
} else {
oop obj = monitor->owner();
if (obj != NULL) {
print_locked_object_class_name(st, obj, "eliminated");
}
}
continue;
}
if (monitor->owner() != NULL) {
// First, assume we have the monitor locked. If we haven't found an
// owned monitor before and this is the first frame, then we need to
// see if we have completed the lock or we are blocked trying to
// acquire it - we can only be blocked if the monitor is inflated
const char *lock_state = "locked"; // assume we have the monitor locked
if (!found_first_monitor && frame_count == 0) {
markOop mark = monitor->owner()->mark();
if (mark->has_monitor() &&
mark->monitor() == thread()->current_pending_monitor()) {
lock_state = "waiting to lock";
}
}
found_first_monitor = true;
print_locked_object_class_name(st, monitor->owner(), lock_state);
}
}
}
}
void frame::print_for_deoptimization(outputStream* st) {
ResourceMark rm;
st->print(" - ");
if (is_interpreted_frame()) {
st->print("I ");
interpretedVFrame* vf = (interpretedVFrame*) vframe::new_vframe(this);
vf->method()->print_value_on(st);
if (ActivationShowBCI) {
st->print(" bci=%d ", vf->bci());
}
std->print_cr(" @ 0x%lx", fp());
print_context_chain(vf->interpreter_context(), st);
if (ActivationShowExpressionStack) {
GrowableArray<oop>* stack = vf->expression_stack();
for (int index = 0; index < stack->length(); index++) {
st->print(" %3d: ", index);
stack->at(index)->print_value_on(st);
st->cr();
}
}
return;
}
if (is_compiled_frame()) {
st->print("C ");
compiledVFrame* vf = (compiledVFrame*) vframe::new_vframe(this);
assert(vf->is_compiled_frame(), "should be compiled vframe");
vf->code()->print_value_on(st);
std->print_cr(" @ 0x%lx", fp());
while (true) {
st->print(" ");
vf->method()->print_value_on(st);
std->print_cr(" @ %d", vf->scope()->offset());
print_context_chain(vf->compiled_context(), st);
if (vf->is_top()) break;
vf = (compiledVFrame*) vf->sender();
assert(vf->is_compiled_frame(), "should be compiled vframe");
}
return;
}
if (is_deoptimized_frame()) {
st->print("D ");
frame_array()->print_value();
std->print_cr(" @ 0x%lx", fp());
deoptimizedVFrame* vf = (deoptimizedVFrame*) vframe::new_vframe(this);
assert(vf->is_deoptimized_frame(), "should be deoptimized vframe");
while (true) {
st->print(" ");
vf->method()->print_value_on(st);
std->cr();
print_context_chain(vf->deoptimized_context(), st);
if (vf->is_top()) break;
vf = (deoptimizedVFrame*) vf->sender();
assert(vf->is_deoptimized_frame(), "should be deoptimized vframe");
}
return;
}
st->print("E foreign frame @ 0x%lx", fp());
}
inline bool frame::is_known_frame() const { return is_interpreted_frame() || is_native_frame() || is_compiled_frame(); }
inline bool frame::is_java_frame() const { return is_interpreted_frame() || is_compiled_frame(); }
bool is_delta_frame() const { return is_interpreted_frame() || is_compiled_frame(); }