diff options
Diffstat (limited to 'src/common/linux')
| -rw-r--r-- | src/common/linux/dump_symbols.cc | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/src/common/linux/dump_symbols.cc b/src/common/linux/dump_symbols.cc index 660f133e..e561ad94 100644 --- a/src/common/linux/dump_symbols.cc +++ b/src/common/linux/dump_symbols.cc @@ -182,6 +182,23 @@ typename ElfClass::Addr GetLoadingAddress( return 0; } +// Find the set of address ranges for all PT_LOAD segments. +template <typename ElfClass> +vector<Module::Range> GetPtLoadSegmentRanges( + const typename ElfClass::Phdr* program_headers, + int nheader) { + typedef typename ElfClass::Phdr Phdr; + vector<Module::Range> ranges; + + for (int i = 0; i < nheader; ++i) { + const Phdr& header = program_headers[i]; + if (header.p_type == PT_LOAD) { + ranges.push_back(Module::Range(header.p_vaddr, header.p_memsz)); + } + } + return ranges; +} + #ifndef NO_STABS_SUPPORT template<typename ElfClass> bool LoadStabs(const typename ElfClass::Ehdr* elf_header, @@ -649,6 +666,14 @@ bool LoadSymbols(const string& obj_file, module->SetLoadAddress(loading_addr); info->set_loading_addr(loading_addr, obj_file); + // Allow filtering of extraneous debug information in partitioned libraries. + // Such libraries contain debug information for all libraries extracted from + // the same combined library, implying extensive duplication. + vector<Module::Range> address_ranges = GetPtLoadSegmentRanges<ElfClass>( + GetOffset<ElfClass, Phdr>(elf_header, elf_header->e_phoff), + elf_header->e_phnum); + module->SetAddressRanges(address_ranges); + const Shdr* sections = GetOffset<ElfClass, Shdr>(elf_header, elf_header->e_shoff); const Shdr* section_names = sections + elf_header->e_shstrndx; |