Method findExecFn

src/pystack/_pystack/corefile.cpp:416–464

}

uintptr_t
CoreFileExtractor::findExecFn() const
{
    LOG(DEBUG) << "Extracting ExecFn information";
    // If we have section headers, look for SHT_NOTE sections.
    // In a core file, the program headers may not be reliable.

    Elf* elf = d_analyzer->d_elf.get();
    uintptr_t result = 0;
    size_t shnum;

    if (elf_getshdrnum(elf, &shnum) < 0) {
        LOG(ERROR) << "Cannot determine the number of sections in the ELF file";
        return (uintptr_t) nullptr;
    }

    LOG(DEBUG) << "Found " << shnum << " sections in the ELF file";

    if (shnum != 0) {
        Elf_Scn* scn = nullptr;
        while ((scn = elf_nextscn(elf, scn)) != nullptr) {
            GElf_Shdr shdr_mem;
            GElf_Shdr* shdr = gelf_getshdr(scn, &shdr_mem);
            if (shdr == nullptr || shdr->sh_type != SHT_NOTE) {
                continue;
            }
            LOG(DEBUG) << "Valid SHT_NOTE segment found with offset " << std::hex << std::showbase
                       << shdr->sh_offset << ". Attempting to get ExecDn structure";
            Elf_Data* data = elf_getdata(scn, nullptr);
            const NoteData note_data{elf, data, shdr->sh_offset};
            if (parseCoreExecfn(note_data, &result) != StatusCode::ERROR) {
                LOG(DEBUG) << "ExecFn structure found";
                return result;
            }
        }
    }

    LOG(DEBUG) << "Failed to locate the NOTE section via section headers";
    LOG(DEBUG) << "Attempting to get ExecFn from auxiliary vector";

    for (const auto& note_data : getNoteData(elf, NT_AUXV, ELF_T_AUXV)) {
        if (parseCoreExecfn(note_data, &result) != StatusCode::ERROR) {
            LOG(DEBUG) << "ExecFn structure found";
            return result;
        }
    }
    LOG(ERROR) << "Failed to extract the ExecFn information from the core file";
    return (uintptr_t) nullptr;
}
std::vector<std::string>
CoreFileExtractor::missingModules() const
{