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had accidentally removed the check the the address isn't past the mapping's end address

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This commit is contained in:
Benoit Jacob 2020-11-19 22:18:12 -05:00
parent 76a7428afd
commit 33b08b3160
1 changed files with 5 additions and 6 deletions
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11
client/TracyProfiler.cpp
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@ -2979,22 +2979,21 @@ std::vector<MappingInfo> ParseMappings()
// the address isn't in `mappings`.
MappingInfo* LookUpMapping(std::vector<MappingInfo>& mappings, uintptr_t address)
{
// Find the first mapping containing the requested address.
// We assume mappings to be sorted by address, as /proc/self/maps seems to be.
// Construct a MappingInfo just for the purpose of using std::lower_bound.
// (It's an abuse of MappingInfo since this address range is not necessarily
// one mapping).
MappingInfo address_range;
address_range.start_address = address;
address_range.end_address = address;
MappingInfo needle;
needle.start_address = address;
needle.end_address = address;
// Comparison function for std::lower_bound. Returns true if all addresses in `m1`
// are lower than all addresses in `m2`.
auto Compare = []( const MappingInfo& m1, const MappingInfo& m2 ) {
// '<=' because the address ranges are half-open intervals, [start, end).
return m1.end_address <= m2.start_address;
};
auto iter = std::lower_bound( mappings.begin(), mappings.end(), address_range, Compare );
if( iter == mappings.end() ) {
auto iter = std::lower_bound( mappings.begin(), mappings.end(), needle, Compare );
if( iter == mappings.end() || iter->end_address <= address) {
return nullptr;
}
return &*iter;