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Add RAII wrapper for gold plugin file management 

Suggested in review of r255256.

llvm-svn: 255779
This commit is contained in:
Teresa Johnson 2015-12-16 16:34:06 +00:00
parent fb3f4907c0
commit cb15b739ef
1 changed files with 31 additions and 23 deletions
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54
llvm/tools/gold/gold-plugin.cpp
View File

@ -57,12 +57,38 @@
using namespace llvm;
static ld_plugin_status discard_message(int level, const char *format, ...) {
// Die loudly. Recent versions of Gold pass ld_plugin_message as the first
// callback in the transfer vector. This should never be called.
abort();
}
static ld_plugin_release_input_file release_input_file = nullptr;
static ld_plugin_get_input_file get_input_file = nullptr;
static ld_plugin_message message = discard_message;
namespace {
struct claimed_file {
void *handle;
std::vector<ld_plugin_symbol> syms;
};
/// RAII wrapper to manage opening and releasing of a ld_plugin_input_file.
struct PluginInputFile {
void *handle;
ld_plugin_input_file File;
PluginInputFile(void *handle) : handle(handle) {
if (get_input_file(handle, &File) != LDPS_OK)
message(LDPL_FATAL, "Failed to get file information");
}
~PluginInputFile() {
if (release_input_file(handle) != LDPS_OK)
message(LDPL_FATAL, "Failed to release file information");
}
ld_plugin_input_file &file() { return File; }
};
struct ResolutionInfo {
bool IsLinkonceOdr = true;
bool UnnamedAddr = true;
@ -75,20 +101,11 @@ struct ResolutionInfo {
};
}
static ld_plugin_status discard_message(int level, const char *format, ...) {
// Die loudly. Recent versions of Gold pass ld_plugin_message as the first
// callback in the transfer vector. This should never be called.
abort();
}
static ld_plugin_get_input_file get_input_file = nullptr;
static ld_plugin_release_input_file release_input_file = nullptr;
static ld_plugin_add_symbols add_symbols = nullptr;
static ld_plugin_get_symbols get_symbols = nullptr;
static ld_plugin_add_input_file add_input_file = nullptr;
static ld_plugin_set_extra_library_path set_extra_library_path = nullptr;
static ld_plugin_get_view get_view = nullptr;
static ld_plugin_message message = discard_message;
static Reloc::Model RelocationModel = Reloc::Default;
static std::string output_name = "";
static std::list<claimed_file> Modules;
@ -847,19 +864,14 @@ static ld_plugin_status allSymbolsReadHook(raw_fd_ostream *ApiFile) {
FunctionInfoIndex CombinedIndex;
uint64_t NextModuleId = 0;
for (claimed_file &F : Modules) {
ld_plugin_input_file File;
if (get_input_file(F.handle, &File) != LDPS_OK)
message(LDPL_FATAL, "Failed to get file information");
PluginInputFile InputFile(F.handle);
std::unique_ptr<FunctionInfoIndex> Index =
getFunctionIndexForFile(F, File);
getFunctionIndexForFile(F, InputFile.file());
// Skip files without a function summary.
if (Index)
CombinedIndex.mergeFrom(std::move(Index), ++NextModuleId);
if (release_input_file(F.handle) != LDPS_OK)
message(LDPL_FATAL, "Failed to release file information");
}
std::error_code EC;
@ -886,12 +898,10 @@ static ld_plugin_status allSymbolsReadHook(raw_fd_ostream *ApiFile) {
StringSet<> Internalize;
StringSet<> Maybe;
for (claimed_file &F : Modules) {
ld_plugin_input_file File;
if (get_input_file(F.handle, &File) != LDPS_OK)
message(LDPL_FATAL, "Failed to get file information");
PluginInputFile InputFile(F.handle);
std::vector<GlobalValue *> Keep;
std::unique_ptr<Module> M =
getModuleForFile(Context, F, File, ApiFile, Internalize, Maybe, Keep);
std::unique_ptr<Module> M = getModuleForFile(
Context, F, InputFile.file(), ApiFile, Internalize, Maybe, Keep);
if (!options::triple.empty())
M->setTargetTriple(options::triple.c_str());
else if (M->getTargetTriple().empty())
@ -899,8 +909,6 @@ static ld_plugin_status allSymbolsReadHook(raw_fd_ostream *ApiFile) {
if (L.move(*M, Keep, [](GlobalValue &, IRMover::ValueAdder) {}))
message(LDPL_FATAL, "Failed to link module");
if (release_input_file(F.handle) != LDPS_OK)
message(LDPL_FATAL, "Failed to release file information");
}
for (const auto &Name : Internalize) {