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29
30// static_contained_range_map-inl.h: Hierarchically-organized range map,
31// i.e., StaticContainedRangeMap implementation.
32//
33// See static_contained_range_map.h for documentation.
34//
35// Author: Siyang Xie (lambxsy@google.com)
36
37#ifndef PROCESSOR_STATIC_CONTAINED_RANGE_MAP_INL_H__
38#define PROCESSOR_STATIC_CONTAINED_RANGE_MAP_INL_H__
39
40#include "processor/static_contained_range_map.h"
41#include "processor/logging.h"
42
43namespace google_breakpad {
44
45template<typename AddressType, typename EntryType>
46StaticContainedRangeMap<AddressType, EntryType>::StaticContainedRangeMap(
47 const char *base)
48 : base_(*(reinterpret_cast<const AddressType*>(base))),
49 entry_size_(*(reinterpret_cast<const uint32_t*>(base + sizeof(base_)))),
50 entry_ptr_(reinterpret_cast<const EntryType*>(
51 base + sizeof(base_) + sizeof(entry_size_))),
52 map_(base + sizeof(base_) + sizeof(entry_size_) + entry_size_) {
53 if (entry_size_ == 0)
54 entry_ptr_ = NULL;
55}
56
57
58template<typename AddressType, typename EntryType>
59bool StaticContainedRangeMap<AddressType, EntryType>::RetrieveRange(
60 const AddressType& address, const EntryType*& entry) const {
61
62 // Get an iterator to the child range whose high address is equal to or
63 // greater than the supplied address. If the supplied address is higher
64 // than all of the high addresses in the range, then this range does not
65 // contain a child at address, so return false. If the supplied address
66 // is lower than the base address of the child range, then it is not within
67 // the child range, so return false.
68 MapConstIterator iterator = map_.lower_bound(address);
69
70 if (iterator == map_.end())
71 return false;
72
73 const char *memory_child =
74 reinterpret_cast<const char*>(iterator.GetValuePtr());
75
76 StaticContainedRangeMap child_map(memory_child);
77
78 if (address < child_map.base_)
79 return false;
80
81 // The child in iterator->second contains the specified address. Find out
82 // if it has a more-specific descendant that also contains it. If it does,
83 // it will set |entry| appropriately. If not, set |entry| to the child.
84 if (!child_map.RetrieveRange(address, entry))
85 entry = child_map.entry_ptr_;
86
87 return true;
88}
89
90template <typename AddressType, typename EntryType>
91bool StaticContainedRangeMap<AddressType, EntryType>::RetrieveRanges(
92 const AddressType& address,
93 std::vector<const EntryType*>& entries) const {
94 MapConstIterator iterator = map_.lower_bound(address);
95 if (iterator == map_.end())
96 return false;
97 const char* memory_child =
98 reinterpret_cast<const char*>(iterator.GetValuePtr());
99 StaticContainedRangeMap child_map(memory_child);
100 if (address < child_map.base_)
101 return false;
102 child_map.RetrieveRanges(address, entries);
103 entries.push_back(child_map.entry_ptr_);
104 return true;
105}
106
107} // namespace google_breakpad
108
109#endif // PROCESSOR_STATIC_CONTAINED_RANGE_MAP_INL_H__
110