1 /*
2 * Copyright (c) 2022 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 /* This files contains process dump header. */
17 #include "dfx_symbols_cache.h"
18
19 #include <algorithm>
20 #include <cstdlib>
21 #include <cstring>
22 #include <cxxabi.h>
23 #include <string>
24 #include <vector>
25 #include "dfx_define.h"
26 #include "libunwind_i-ohos.h"
27
28 #ifdef __cplusplus
29 extern "C" {
30 #endif
SymbolComparator(DfxSymbol s1,DfxSymbol s2)31 bool SymbolComparator(DfxSymbol s1, DfxSymbol s2)
32 {
33 return (s1.start < s2.start);
34 };
35 #ifdef __cplusplus
36 };
37 #endif
38
39 namespace OHOS {
40 namespace HiviewDFX {
GetNameAndOffsetByPc(struct unw_addr_space * as,uint64_t pc,std::string & name,uint64_t & offset)41 bool DfxSymbolsCache::GetNameAndOffsetByPc(struct unw_addr_space *as,
42 uint64_t pc, std::string& name, uint64_t& offset)
43 {
44 if (GetNameAndOffsetByPc(pc, name, offset)) {
45 return true;
46 }
47
48 char buf[LOG_BUF_LEN] { 0 };
49 DfxSymbol symbol;
50 if (unw_get_symbol_info_by_pc(as, pc, LOG_BUF_LEN, buf, &symbol.start, &symbol.end) != 0) {
51 return false;
52 }
53
54 if (strlen(buf) >= LOG_BUF_LEN - 1) {
55 return false;
56 }
57
58 int status = 0;
59 auto funcName = abi::__cxa_demangle(buf, nullptr, nullptr, &status);
60 if (funcName != nullptr) {
61 symbol.funcName = std::string(funcName);
62 std::free(funcName);
63 } else {
64 symbol.funcName = std::string(buf, strlen(buf));
65 }
66 offset = pc - symbol.start;
67 name = symbol.funcName;
68 cachedSymbols_.push_back(symbol);
69 std::sort(cachedSymbols_.begin(), cachedSymbols_.end(), SymbolComparator);
70 return true;
71 }
72
GetNameAndOffsetByPc(uint64_t pc,std::string & name,uint64_t & offset)73 bool DfxSymbolsCache::GetNameAndOffsetByPc(uint64_t pc, std::string& name, uint64_t& offset)
74 {
75 size_t begin = 0;
76 size_t end = cachedSymbols_.size();
77 while (begin < end) {
78 size_t mid = begin + (end - begin) / 2;
79 DfxSymbol& symbol = cachedSymbols_[mid];
80 if (pc < symbol.start) {
81 end = mid;
82 } else if (pc <= symbol.end) {
83 offset = pc - symbol.start;
84 name = symbol.funcName;
85 return true;
86 } else {
87 begin = mid + 1;
88 }
89 }
90 return false;
91 }
92 } // namespace HiviewDFX
93 } // namespace OHOS
94