1 /* Copyright (C) 2017 The Android Open Source Project
2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
3 *
4 * This file implements interfaces from the file jvmti.h. This implementation
5 * is licensed under the same terms as the file jvmti.h. The
6 * copyright and license information for the file jvmti.h follows.
7 *
8 * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved.
9 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
10 *
11 * This code is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License version 2 only, as
13 * published by the Free Software Foundation. Oracle designates this
14 * particular file as subject to the "Classpath" exception as provided
15 * by Oracle in the LICENSE file that accompanied this code.
16 *
17 * This code is distributed in the hope that it will be useful, but WITHOUT
18 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
19 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
20 * version 2 for more details (a copy is included in the LICENSE file that
21 * accompanied this code).
22 *
23 * You should have received a copy of the GNU General Public License version
24 * 2 along with this work; if not, write to the Free Software Foundation,
25 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
26 *
27 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
28 * or visit www.oracle.com if you need additional information or have any
29 * questions.
30 */
31
32 #include <functional>
33
34 #include "ti_breakpoint.h"
35
36 #include "art_jvmti.h"
37 #include "art_method-inl.h"
38 #include "base/enums.h"
39 #include "base/mutex-inl.h"
40 #include "deopt_manager.h"
41 #include "dex/dex_file_annotations.h"
42 #include "dex/modifiers.h"
43 #include "events-inl.h"
44 #include "jni/jni_internal.h"
45 #include "mirror/class-inl.h"
46 #include "mirror/object_array-inl.h"
47 #include "nativehelper/scoped_local_ref.h"
48 #include "runtime_callbacks.h"
49 #include "scoped_thread_state_change-inl.h"
50 #include "thread-current-inl.h"
51 #include "thread_list.h"
52 #include "ti_phase.h"
53
54 namespace openjdkjvmti {
55
hash() const56 size_t Breakpoint::hash() const {
57 return std::hash<uintptr_t> {}(reinterpret_cast<uintptr_t>(method_))
58 ^ std::hash<jlocation> {}(location_);
59 }
60
Breakpoint(art::ArtMethod * m,jlocation loc)61 Breakpoint::Breakpoint(art::ArtMethod* m, jlocation loc) : method_(m), location_(loc) {
62 DCHECK(!m->IsDefault() || !m->IsCopied() || !m->IsInvokable())
63 << "Flags are: 0x" << std::hex << m->GetAccessFlags();
64 }
65
RemoveBreakpointsInClass(ArtJvmTiEnv * env,art::mirror::Class * klass)66 void BreakpointUtil::RemoveBreakpointsInClass(ArtJvmTiEnv* env, art::mirror::Class* klass) {
67 std::vector<Breakpoint> to_remove;
68 {
69 art::WriterMutexLock lk(art::Thread::Current(), env->event_info_mutex_);
70 for (const Breakpoint& b : env->breakpoints) {
71 if (b.GetMethod()->GetDeclaringClass() == klass) {
72 to_remove.push_back(b);
73 }
74 }
75 for (const Breakpoint& b : to_remove) {
76 auto it = env->breakpoints.find(b);
77 DCHECK(it != env->breakpoints.end());
78 env->breakpoints.erase(it);
79 }
80 }
81 DeoptManager* deopt = DeoptManager::Get();
82 for (const Breakpoint& b : to_remove) {
83 // TODO It might be good to send these all at once instead.
84 deopt->RemoveMethodBreakpoint(b.GetMethod());
85 }
86 }
87
SetBreakpoint(jvmtiEnv * jenv,jmethodID method,jlocation location)88 jvmtiError BreakpointUtil::SetBreakpoint(jvmtiEnv* jenv, jmethodID method, jlocation location) {
89 ArtJvmTiEnv* env = ArtJvmTiEnv::AsArtJvmTiEnv(jenv);
90 if (method == nullptr) {
91 return ERR(INVALID_METHODID);
92 }
93 art::ScopedObjectAccess soa(art::Thread::Current());
94 art::ArtMethod* art_method = art::jni::DecodeArtMethod(method)->GetCanonicalMethod();
95 if (location < 0 || static_cast<uint32_t>(location) >=
96 art_method->DexInstructions().InsnsSizeInCodeUnits()) {
97 return ERR(INVALID_LOCATION);
98 }
99 DeoptManager::Get()->AddMethodBreakpoint(art_method);
100 {
101 art::WriterMutexLock lk(art::Thread::Current(), env->event_info_mutex_);
102 auto res_pair = env->breakpoints.insert(/* Breakpoint */ {art_method, location});
103 if (LIKELY(res_pair.second)) {
104 return OK;
105 }
106 }
107 // Didn't get inserted because it's already present!
108 DeoptManager::Get()->RemoveMethodBreakpoint(art_method);
109 return ERR(DUPLICATE);
110 }
111
ClearBreakpoint(jvmtiEnv * jenv,jmethodID method,jlocation location)112 jvmtiError BreakpointUtil::ClearBreakpoint(jvmtiEnv* jenv, jmethodID method, jlocation location) {
113 ArtJvmTiEnv* env = ArtJvmTiEnv::AsArtJvmTiEnv(jenv);
114 if (method == nullptr) {
115 return ERR(INVALID_METHODID);
116 }
117 art::ScopedObjectAccess soa(art::Thread::Current());
118 art::ArtMethod* art_method = art::jni::DecodeArtMethod(method)->GetCanonicalMethod();
119 {
120 art::WriterMutexLock lk(art::Thread::Current(), env->event_info_mutex_);
121 auto pos = env->breakpoints.find(/* Breakpoint */ {art_method, location});
122 if (pos == env->breakpoints.end()) {
123 return ERR(NOT_FOUND);
124 }
125 env->breakpoints.erase(pos);
126 }
127 DeoptManager::Get()->RemoveMethodBreakpoint(art_method);
128 return OK;
129 }
130
131 } // namespace openjdkjvmti
132