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[ELF][LTO] Recognize IR files generated by GCC 11

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This commit is contained in:
Rui Ueyama 2022-02-12 16:28:38 +09:00
parent 1dcd20b401
commit c1963ce2ac
2 changed files with 5 additions and 8 deletions
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6
elf/lto.cc
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@ -251,8 +251,6 @@ static int phase = 0;
static void *dlopen_handle;
static std::vector<PluginSymbol> plugin_symbols;
static std::vector<std::unique_ptr<PluginInputFile>> plugin_files;
static ClaimFileHandler *claim_file_hook;
static AllSymbolsReadHandler *all_symbols_read_hook;
static CleanupHandler *cleanup_hook;
@ -336,10 +334,6 @@ get_input_file(const void *handle, struct PluginInputFile *file) {
template <typename E>
static PluginStatus release_input_file(const void *handle) {
LOG << "release_input_file\n";
i64 idx = (i64)handle;
if (idx < 0 || plugin_files.size() <= idx)
return LDPS_BAD_HANDLE;
close(plugin_files[idx]->fd);
return LDPS_OK;
}

7
filetype.h
View File

@ -43,11 +43,14 @@ inline bool is_gcc_lto_obj(MappedFile<C> *mf) {
std::span<ElfSym<E>> elf_syms{(ElfSym<E> *)(data + sec.sh_offset),
sec.sh_size / sizeof(ElfSym<E>)};
auto skip = [](u8 type) {
return type == STT_NOTYPE || type == STT_FILE || type == STT_SECTION;
};
// GCC LTO object contains only sections symbols followed by a common
// symbol whose name is `__gnu_lto_v1` or `__gnu_lto_slim`.
i64 i = 1;
while (i < elf_syms.size() &&
(elf_syms[i].st_type == STT_FILE || elf_syms[i].st_type == STT_SECTION))
while (i < elf_syms.size() && skip(elf_syms[i].st_type))
i++;
if (i < elf_syms.size() && elf_syms[i].st_shndx == SHN_COMMON) {