1 /* Copyright (C) 2016 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 "ti_allocator.h"
33
34 #if defined(__APPLE__)
35 // Apple doesn't have malloc.h. Just give this function a non-functional definition.
36 #define malloc_usable_size(P) 0
37 #else
38 #include <malloc.h>
39 #endif
40
41 #include <atomic>
42
43 #include "art_jvmti.h"
44 #include "base/enums.h"
45
46 namespace openjdkjvmti {
47
48 std::atomic<jlong> AllocUtil::allocated;
49
GetGlobalJvmtiAllocationState(jvmtiEnv * env ATTRIBUTE_UNUSED,jlong * allocated_ptr)50 jvmtiError AllocUtil::GetGlobalJvmtiAllocationState(jvmtiEnv* env ATTRIBUTE_UNUSED,
51 jlong* allocated_ptr) {
52 if (allocated_ptr == nullptr) {
53 return ERR(NULL_POINTER);
54 }
55 *allocated_ptr = allocated.load();
56 return OK;
57 }
58
Allocate(jvmtiEnv * env ATTRIBUTE_UNUSED,jlong size,unsigned char ** mem_ptr)59 jvmtiError AllocUtil::Allocate(jvmtiEnv* env ATTRIBUTE_UNUSED,
60 jlong size,
61 unsigned char** mem_ptr) {
62 if (size < 0) {
63 return ERR(ILLEGAL_ARGUMENT);
64 } else if (size == 0) {
65 *mem_ptr = nullptr;
66 return OK;
67 }
68 *mem_ptr = AllocateImpl(size);
69 if (UNLIKELY(*mem_ptr == nullptr)) {
70 return ERR(OUT_OF_MEMORY);
71 }
72 return OK;
73 }
74
AllocateImpl(jlong size)75 unsigned char* AllocUtil::AllocateImpl(jlong size) {
76 unsigned char* ret = size != 0 ? reinterpret_cast<unsigned char*>(malloc(size)) : nullptr;
77 if (LIKELY(ret != nullptr)) {
78 allocated += malloc_usable_size(ret);
79 }
80 return ret;
81 }
82
Deallocate(jvmtiEnv * env ATTRIBUTE_UNUSED,unsigned char * mem)83 jvmtiError AllocUtil::Deallocate(jvmtiEnv* env ATTRIBUTE_UNUSED, unsigned char* mem) {
84 DeallocateImpl(mem);
85 return OK;
86 }
87
DeallocateImpl(unsigned char * mem)88 void AllocUtil::DeallocateImpl(unsigned char* mem) {
89 if (mem != nullptr) {
90 allocated -= malloc_usable_size(mem);
91 free(mem);
92 }
93 }
94
95 } // namespace openjdkjvmti
96