blob: ebaa29fbaeb0b568c9133826c8b95d44c65b656c (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
|
// Copyright 2020 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "src/heap/code-object-registry.h"
#include <algorithm>
#include "src/base/logging.h"
namespace v8 {
namespace internal {
void CodeObjectRegistry::RegisterNewlyAllocatedCodeObject(Address code) {
auto result = code_object_registry_newly_allocated_.insert(code);
USE(result);
DCHECK(result.second);
}
void CodeObjectRegistry::RegisterAlreadyExistingCodeObject(Address code) {
code_object_registry_already_existing_.push_back(code);
}
void CodeObjectRegistry::Clear() {
code_object_registry_already_existing_.clear();
code_object_registry_newly_allocated_.clear();
}
void CodeObjectRegistry::Finalize() {
code_object_registry_already_existing_.shrink_to_fit();
}
bool CodeObjectRegistry::Contains(Address object) const {
return (code_object_registry_newly_allocated_.find(object) !=
code_object_registry_newly_allocated_.end()) ||
(std::binary_search(code_object_registry_already_existing_.begin(),
code_object_registry_already_existing_.end(),
object));
}
Address CodeObjectRegistry::GetCodeObjectStartFromInnerAddress(
Address address) const {
// Let's first find the object which comes right before address in the vector
// of already existing code objects.
Address already_existing_set_ = 0;
Address newly_allocated_set_ = 0;
if (!code_object_registry_already_existing_.empty()) {
auto it =
std::upper_bound(code_object_registry_already_existing_.begin(),
code_object_registry_already_existing_.end(), address);
if (it != code_object_registry_already_existing_.begin()) {
already_existing_set_ = *(--it);
}
}
// Next, let's find the object which comes right before address in the set
// of newly allocated code objects.
if (!code_object_registry_newly_allocated_.empty()) {
auto it = code_object_registry_newly_allocated_.upper_bound(address);
if (it != code_object_registry_newly_allocated_.begin()) {
newly_allocated_set_ = *(--it);
}
}
// The code objects which contains address has to be in one of the two
// data structures.
DCHECK(already_existing_set_ != 0 || newly_allocated_set_ != 0);
// The address which is closest to the given address is the code object.
return already_existing_set_ > newly_allocated_set_ ? already_existing_set_
: newly_allocated_set_;
}
} // namespace internal
} // namespace v8
|
