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/*
- * Copyright (c) 2011, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2011, 2026, 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
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
+ #include "code/debugInfoRec.hpp"
+ #include "code/nmethod.hpp"
+ #include "code/pcDesc.hpp"
+ #include "jfr/periodic/sampling/jfrSampleRequest.hpp"
#include "jfr/recorder/checkpoint/jfrCheckpointWriter.hpp"
#include "jfr/recorder/checkpoint/types/traceid/jfrTraceId.inline.hpp"
#include "jfr/recorder/repository/jfrChunkWriter.hpp"
#include "jfr/recorder/stacktrace/jfrStackTrace.hpp"
#include "jfr/recorder/stacktrace/jfrVframeStream.inline.hpp"
static inline bool is_in_continuation(const frame& frame, JavaThread* jt) {
return JfrThreadLocal::is_vthread(jt) &&
(Continuation::is_frame_in_continuation(jt, frame) || Continuation::is_continuation_enterSpecial(frame));
}
- static inline bool is_interpreter(const JfrSampleRequest& request) {
- return request._sample_bcp != nullptr;
+ inline void JfrStackTrace::record_frame(const Method* method, int bci, u1 frame_type) {
+ assert(method != nullptr, "invariant");
+ const traceid mid = JfrTraceId::load(method);
+ _hash = (_hash * 31) + mid;
+ _hash = (_hash * 31) + bci;
+ _hash = (_hash * 31) + frame_type;
+ _frames->append(JfrStackFrame(mid, bci, frame_type, method->method_holder()));
+ _count++;
}
void JfrStackTrace::record_interpreter_top_frame(const JfrSampleRequest& request) {
assert(_hash == 0, "invariant");
assert(_count == 0, "invariant");
assert(_frames != nullptr, "invariant");
assert(_frames->length() == 0, "invariant");
_hash = 1;
const Method* method = reinterpret_cast<Method*>(request._sample_pc);
assert(method != nullptr, "invariant");
- const traceid mid = JfrTraceId::load(method);
const int bci = method->is_native() ? 0 : method->bci_from(reinterpret_cast<address>(request._sample_bcp));
const u1 type = method->is_native() ? JfrStackFrame::FRAME_NATIVE : JfrStackFrame::FRAME_INTERPRETER;
- _hash = (_hash * 31) + mid;
- _hash = (_hash * 31) + bci;
- _hash = (_hash * 31) + type;
- _frames->append(JfrStackFrame(mid, bci, type, method->method_holder()));
- _count++;
+ record_frame(method, bci, type);
+ }
+
+ class JfrUnpackNeedStackRepair {
+ private:
+ const PcDesc* const _pc_desc;
+ const nmethod* const _nm;
+ const Method* _method;
+ int _decode_offset;
+ int _bci;
+
+ public:
+ JfrUnpackNeedStackRepair(const PcDesc* pc_desc, const nmethod* nm) : _pc_desc(pc_desc),
+ _nm(nm),
+ _method(nullptr),
+ _decode_offset(_pc_desc->scope_decode_offset()),
+ _bci(0) {
+ assert(_pc_desc != nullptr, "invariant");
+ assert(_nm != nullptr, "invariant");
+ assert(_nm->needs_stack_repair(), "invariant");
+ assert(!_nm->is_native_method(), "invariant");
+ assert(_decode_offset != DebugInformationRecorder::serialized_null, "invariant");
+ }
+
+ bool has_next() const {
+ return _decode_offset != DebugInformationRecorder::serialized_null;
+ }
+
+ void next() {
+ assert(has_next(), "invariant");
+ DebugInfoReadStream reader(_nm, _decode_offset);
+ _decode_offset = reader.read_int();
+ _method = reader.read_method();
+ _bci = reader.read_bci();
+ }
+
+ const Method* method() const {
+ return _method;
+ }
+
+ int normalized_bci() const {
+ return _bci == InvocationEntryBci ? 0 : _bci;
+ }
+ };
+
+ void JfrStackTrace::record_stack_repair_top_frame(const JfrSampleRequest& request) {
+ assert(p2i(request._sample_bcp) == JfrSampleRequestFrameType::NEEDS_STACK_REPAIR, "invariant");
+ assert(_hash == 0, "invariant");
+ assert(_count == 0, "invariant");
+ assert(_frames != nullptr, "invariant");
+ assert(_frames->length() == 0, "invariant");
+ _hash = 1;
+ JfrUnpackNeedStackRepair unpack(static_cast<PcDesc*>(request._sample_pc),
+ static_cast<nmethod*>(request._sample_sp));
+ while (unpack.has_next()) {
+ unpack.next();
+ record_frame(unpack.method(), unpack.normalized_bci(), unpack.has_next() ? JfrStackFrame::FRAME_INLINE : JfrStackFrame::FRAME_JIT);
+ }
+ }
+
+ static inline JfrSampleRequestFrameType frame_type(const JfrSampleRequest& request) {
+ const intptr_t value = p2i(request._sample_bcp);
+ if (value == 0) {
+ return JfrSampleRequestFrameType::NONE;
+ }
+ return value == JfrSampleRequestFrameType::NEEDS_STACK_REPAIR ? JfrSampleRequestFrameType::NEEDS_STACK_REPAIR :
+ JfrSampleRequestFrameType::INTERPRETER;
}
bool JfrStackTrace::record(JavaThread* jt, const frame& frame, bool in_continuation, const JfrSampleRequest& request) {
- if (is_interpreter(request)) {
+ const JfrSampleRequestFrameType ft = frame_type(request);
+ if (ft == JfrSampleRequestFrameType::NONE) {
+ return record(jt, frame, in_continuation, 0);
+ }
+ if (ft == JfrSampleRequestFrameType::INTERPRETER) {
record_interpreter_top_frame(request);
- if (frame.pc() == nullptr) {
- // No sender frame. Done.
- return true;
- }
+ } else {
+ assert(ft == JfrSampleRequestFrameType::NEEDS_STACK_REPAIR, "invariant");
+ record_stack_repair_top_frame(request);
+ }
+ if (frame.pc() == nullptr) {
+ // No sender frame. Done.
+ return true;
}
return record(jt, frame, in_continuation, 0);
}
bool JfrStackTrace::record(JavaThread* jt, int skip, int64_t stack_filter_id) {
bool JfrStackTrace::record_inner(JavaThread* jt, const frame& frame, bool in_continuation, int skip, int64_t stack_filter_id /* -1 */) {
assert(jt != nullptr, "invariant");
assert(!_lineno, "invariant");
assert(_frames != nullptr, "invariant");
- assert(_frames->length() == 0 || _frames->length() == 1, "invariant");
assert(!in_continuation || is_in_continuation(frame, jt), "invariant");
Thread* const current_thread = Thread::current();
HandleMark hm(current_thread); // RegisterMap uses Handles to support continuations.
JfrVframeStream vfs(jt, frame, in_continuation, false);
_reached_root = true;
if (stack_filter->match(method)) {
vfs.next_vframe();
continue;
}
}
- const traceid mid = JfrTraceId::load(method);
u1 type = vfs.is_interpreted_frame() ? JfrStackFrame::FRAME_INTERPRETER : JfrStackFrame::FRAME_JIT;
int bci = 0;
if (method->is_native()) {
type = JfrStackFrame::FRAME_NATIVE;
} else {
- bci = vfs.bci();
+ bci = vfs.normalized_bci();
}
const intptr_t* const frame_id = vfs.frame_id();
vfs.next_vframe();
if (type == JfrStackFrame::FRAME_JIT && !vfs.at_end() && frame_id == vfs.frame_id()) {
// This frame and the caller frame are both the same physical
// frame, so this frame is inlined into the caller.
type = JfrStackFrame::FRAME_INLINE;
}
- _hash = (_hash * 31) + mid;
- _hash = (_hash * 31) + bci;
- _hash = (_hash * 31) + type;
- _frames->append(JfrStackFrame(mid, bci, type, method->method_holder()));
- _count++;
+ record_frame(method, bci, type);
}
return _count > 0;
}
void JfrStackTrace::resolve_linenos() const {
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