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
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
|
//===-- asan_suppressions.cpp ---------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file is a part of AddressSanitizer, an address sanity checker.
//
// Issue suppression and suppression-related functions.
//===----------------------------------------------------------------------===//
#include "asan_suppressions.h"
#include "asan_stack.h"
#include "sanitizer_common/sanitizer_placement_new.h"
#include "sanitizer_common/sanitizer_suppressions.h"
#include "sanitizer_common/sanitizer_symbolizer.h"
namespace __asan {
alignas(64) static char suppression_placeholder[sizeof(SuppressionContext)];
static SuppressionContext *suppression_ctx = nullptr;
static const char kInterceptorName[] = "interceptor_name";
static const char kInterceptorViaFunction[] = "interceptor_via_fun";
static const char kInterceptorViaLibrary[] = "interceptor_via_lib";
static const char kODRViolation[] = "odr_violation";
static const char kAllocDeallocMismatch[] = "alloc_dealloc_mismatch";
static const char *kSuppressionTypes[] = {
kInterceptorName, kInterceptorViaFunction, kInterceptorViaLibrary,
kODRViolation, kAllocDeallocMismatch};
SANITIZER_INTERFACE_WEAK_DEF(const char *, __asan_default_suppressions, void) {
return "";
}
void InitializeSuppressions() {
CHECK_EQ(nullptr, suppression_ctx);
suppression_ctx = new (suppression_placeholder)
SuppressionContext(kSuppressionTypes, ARRAY_SIZE(kSuppressionTypes));
suppression_ctx->ParseFromFile(flags()->suppressions);
suppression_ctx->Parse(__asan_default_suppressions());
}
bool IsInterceptorSuppressed(const char *interceptor_name) {
CHECK(suppression_ctx);
Suppression *s;
// Match "interceptor_name" suppressions.
return suppression_ctx->Match(interceptor_name, kInterceptorName, &s);
}
bool HaveStackTraceBasedSuppressions() {
CHECK(suppression_ctx);
return suppression_ctx->HasSuppressionType(kInterceptorViaFunction) ||
suppression_ctx->HasSuppressionType(kInterceptorViaLibrary);
}
bool IsODRViolationSuppressed(const char *global_var_name) {
CHECK(suppression_ctx);
Suppression *s;
// Match "odr_violation" suppressions.
return suppression_ctx->Match(global_var_name, kODRViolation, &s);
}
bool IsAddrSuppressed(const char *suppression, Symbolizer *symbolizer,
uptr addr) {
CHECK(suppression_ctx);
CHECK(suppression_ctx->HasSuppressionType(suppression));
CHECK(symbolizer);
SymbolizedStackHolder symbolized_stack(symbolizer->SymbolizePC(addr));
const SymbolizedStack *frames = symbolized_stack.get();
CHECK(frames);
for (const SymbolizedStack *cur = frames; cur; cur = cur->next) {
const char *function_name = cur->info.function;
if (!function_name) {
continue;
}
// Match suppressions.
Suppression *s;
if (suppression_ctx->Match(function_name, suppression, &s)) {
return true;
}
}
return false;
}
bool IsAllocDeallocMismatchSuppressed(const StackTrace *stack) {
CHECK(suppression_ctx);
if (!suppression_ctx->HasSuppressionType(kAllocDeallocMismatch)) {
return false;
}
Symbolizer *symbolizer = Symbolizer::GetOrInit();
for (uptr i = 0; i < stack->size && stack->trace[i]; i++) {
uptr addr = stack->trace[i];
// Match "alloc_dealloc_mismatch" suppressions.
if (IsAddrSuppressed(kAllocDeallocMismatch, symbolizer, addr)) {
return true;
}
}
return false;
}
bool IsStackTraceSuppressed(const StackTrace *stack) {
if (!HaveStackTraceBasedSuppressions())
return false;
CHECK(suppression_ctx);
Symbolizer *symbolizer = Symbolizer::GetOrInit();
Suppression *s;
for (uptr i = 0; i < stack->size && stack->trace[i]; i++) {
uptr addr = stack->trace[i];
if (suppression_ctx->HasSuppressionType(kInterceptorViaLibrary)) {
// Match "interceptor_via_lib" suppressions.
if (const char *module_name = symbolizer->GetModuleNameForPc(addr))
if (suppression_ctx->Match(module_name, kInterceptorViaLibrary, &s))
return true;
}
if (suppression_ctx->HasSuppressionType(kInterceptorViaFunction)) {
// Match "interceptor_via_func" suppressions.
if (IsAddrSuppressed(kInterceptorViaFunction, symbolizer, addr)) {
return true;
}
}
}
return false;
}
} // namespace __asan
|
