1 // Copyright (c) 2006, Google Inc.
2 // All rights reserved.
3 //
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5 // modification, are permitted provided that the following conditions are
6 // met:
7 //
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9 // notice, this list of conditions and the following disclaimer.
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11 // copyright notice, this list of conditions and the following disclaimer
12 // in the documentation and/or other materials provided with the
13 // distribution.
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16 // this software without specific prior written permission.
17 //
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25 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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28 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29
30 // basic_code_modules.cc: Contains all of the CodeModule objects that
31 // were loaded into a single process.
32 //
33 // See basic_code_modules.h for documentation.
34 //
35 // Author: Mark Mentovai
36
37 #include "processor/basic_code_modules.h"
38
39 #include <assert.h>
40
41 #include "google_breakpad/processor/code_module.h"
42 #include "processor/linked_ptr.h"
43 #include "processor/logging.h"
44 #include "processor/range_map-inl.h"
45
46 namespace google_breakpad {
47
BasicCodeModules(const CodeModules * that)48 BasicCodeModules::BasicCodeModules(const CodeModules *that)
49 : main_address_(0),
50 map_(new RangeMap<uint64_t, linked_ptr<const CodeModule> >()) {
51 BPLOG_IF(ERROR, !that) << "BasicCodeModules::BasicCodeModules requires "
52 "|that|";
53 assert(that);
54
55 const CodeModule *main_module = that->GetMainModule();
56 if (main_module)
57 main_address_ = main_module->base_address();
58
59 unsigned int count = that->module_count();
60 for (unsigned int module_sequence = 0;
61 module_sequence < count;
62 ++module_sequence) {
63 // Make a copy of the module and insert it into the map. Use
64 // GetModuleAtIndex because ordering is unimportant when slurping the
65 // entire list, and GetModuleAtIndex may be faster than
66 // GetModuleAtSequence.
67 linked_ptr<const CodeModule> module(
68 that->GetModuleAtIndex(module_sequence)->Copy());
69 if (!map_->StoreRange(module->base_address(), module->size(), module)) {
70 BPLOG(ERROR) << "Module " << module->code_file() <<
71 " could not be stored";
72 }
73 }
74 }
75
BasicCodeModules()76 BasicCodeModules::BasicCodeModules()
77 : main_address_(0),
78 map_(new RangeMap<uint64_t, linked_ptr<const CodeModule> >()) {
79 }
80
~BasicCodeModules()81 BasicCodeModules::~BasicCodeModules() {
82 delete map_;
83 }
84
module_count() const85 unsigned int BasicCodeModules::module_count() const {
86 return map_->GetCount();
87 }
88
GetModuleForAddress(uint64_t address) const89 const CodeModule* BasicCodeModules::GetModuleForAddress(
90 uint64_t address) const {
91 linked_ptr<const CodeModule> module;
92 if (!map_->RetrieveRange(address, &module, NULL, NULL)) {
93 BPLOG(INFO) << "No module at " << HexString(address);
94 return NULL;
95 }
96
97 return module.get();
98 }
99
GetMainModule() const100 const CodeModule* BasicCodeModules::GetMainModule() const {
101 return GetModuleForAddress(main_address_);
102 }
103
GetModuleAtSequence(unsigned int sequence) const104 const CodeModule* BasicCodeModules::GetModuleAtSequence(
105 unsigned int sequence) const {
106 linked_ptr<const CodeModule> module;
107 if (!map_->RetrieveRangeAtIndex(sequence, &module, NULL, NULL)) {
108 BPLOG(ERROR) << "RetrieveRangeAtIndex failed for sequence " << sequence;
109 return NULL;
110 }
111
112 return module.get();
113 }
114
GetModuleAtIndex(unsigned int index) const115 const CodeModule* BasicCodeModules::GetModuleAtIndex(
116 unsigned int index) const {
117 // This class stores everything in a RangeMap, without any more-efficient
118 // way to walk the list of CodeModule objects. Implement GetModuleAtIndex
119 // using GetModuleAtSequence, which meets all of the requirements, and
120 // in addition, guarantees ordering.
121 return GetModuleAtSequence(index);
122 }
123
Copy() const124 const CodeModules* BasicCodeModules::Copy() const {
125 return new BasicCodeModules(this);
126 }
127
128 } // namespace google_breakpad
129