//
//===----------------------------------------------------------------------===//
-#include "llvm/Config/config.h"
+#include "llvm/Config/config.h" // plugin-api.h requires HAVE_STDINT_H
#include "plugin-api.h"
#include "llvm-c/lto.h"
-#include "llvm/Support/raw_ostream.h"
-#include "llvm/System/Errno.h"
-#include "llvm/System/Path.h"
-#include "llvm/System/Program.h"
+#include "llvm/ADT/OwningPtr.h"
+#include "llvm/Support/system_error.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/ToolOutputFile.h"
+#include "llvm/Support/Errno.h"
+#include "llvm/Support/Path.h"
+#include "llvm/Support/Program.h"
#include <cerrno>
#include <cstdlib>
#include <list>
#include <vector>
+// Support Windows/MinGW crazyness.
+#ifdef _WIN32
+# include <io.h>
+# define lseek _lseek
+# define read _read
+#endif
+
using namespace llvm;
namespace {
ld_plugin_add_input_file add_input_file = NULL;
ld_plugin_add_input_library add_input_library = NULL;
ld_plugin_set_extra_library_path set_extra_library_path = NULL;
+ ld_plugin_get_view get_view = NULL;
ld_plugin_message message = discard_message;
int api_version = 0;
int gold_version = 0;
struct claimed_file {
- lto_module_t M;
void *handle;
std::vector<ld_plugin_symbol> syms;
};
std::string output_name = "";
std::list<claimed_file> Modules;
std::vector<sys::Path> Cleanup;
+ lto_code_gen_t code_gen = NULL;
}
namespace options {
static bool generate_api_file = false;
static generate_bc generate_bc_file = BC_NO;
static std::string bc_path;
- static std::string as_path;
- static std::vector<std::string> as_args;
- static std::vector<std::string> pass_through;
+ static std::string obj_path;
static std::string extra_library_path;
static std::string triple;
static std::string mcpu;
generate_api_file = true;
} else if (opt.startswith("mcpu=")) {
mcpu = opt.substr(strlen("mcpu="));
- } else if (opt.startswith("as=")) {
- if (!as_path.empty()) {
- (*message)(LDPL_WARNING, "Path to as specified twice. "
- "Discarding %s", opt_);
- } else {
- as_path = opt.substr(strlen("as="));
- }
- } else if (opt.startswith("as-arg=")) {
- llvm::StringRef item = opt.substr(strlen("as-arg="));
- as_args.push_back(item.str());
} else if (opt.startswith("extra-library-path=")) {
extra_library_path = opt.substr(strlen("extra_library_path="));
- } else if (opt.startswith("pass-through=")) {
- llvm::StringRef item = opt.substr(strlen("pass-through="));
- pass_through.push_back(item.str());
} else if (opt.startswith("mtriple=")) {
triple = opt.substr(strlen("mtriple="));
+ } else if (opt.startswith("obj-path=")) {
+ obj_path = opt.substr(strlen("obj-path="));
} else if (opt == "emit-llvm") {
generate_bc_file = BC_ONLY;
} else if (opt == "also-emit-llvm") {
if ((*callback)(all_symbols_read_hook) != LDPS_OK)
return LDPS_ERR;
+
+ code_gen = lto_codegen_create();
} break;
case LDPT_REGISTER_CLEANUP_HOOK: {
ld_plugin_register_cleanup callback;
case LDPT_SET_EXTRA_LIBRARY_PATH:
set_extra_library_path = tv->tv_u.tv_set_extra_library_path;
break;
+ case LDPT_GET_VIEW:
+ get_view = tv->tv_u.tv_get_view;
+ break;
case LDPT_MESSAGE:
message = tv->tv_u.tv_message;
break;
/// with add_symbol if possible.
static ld_plugin_status claim_file_hook(const ld_plugin_input_file *file,
int *claimed) {
- void *buf = NULL;
- if (file->offset) {
+ lto_module_t M;
+ const void *view;
+ OwningPtr<MemoryBuffer> buffer;
+ if (get_view) {
+ if (get_view(file->handle, &view) != LDPS_OK) {
+ (*message)(LDPL_ERROR, "Failed to get a view of %s", file->name);
+ return LDPS_ERR;
+ }
+ } else {
+ int64_t offset = 0;
// Gold has found what might be IR part-way inside of a file, such as
// an .a archive.
- if (lseek(file->fd, file->offset, SEEK_SET) == -1) {
- (*message)(LDPL_ERROR,
- "Failed to seek to archive member of %s at offset %d: %s\n",
- file->name,
- file->offset, sys::StrError(errno).c_str());
- return LDPS_ERR;
+ if (file->offset) {
+ offset = file->offset;
}
- buf = malloc(file->filesize);
- if (!buf) {
- (*message)(LDPL_ERROR,
- "Failed to allocate buffer for archive member of size: %d\n",
- file->filesize);
+ if (error_code ec =
+ MemoryBuffer::getOpenFile(file->fd, file->name, buffer, file->filesize,
+ -1, offset, false)) {
+ (*message)(LDPL_ERROR, ec.message().c_str());
return LDPS_ERR;
}
- if (read(file->fd, buf, file->filesize) != file->filesize) {
+ view = buffer->getBufferStart();
+ }
+
+ if (!lto_module_is_object_file_in_memory(view, file->filesize))
+ return LDPS_OK;
+
+ M = lto_module_create_from_memory(view, file->filesize);
+ if (!M) {
+ if (const char* msg = lto_get_error_message()) {
(*message)(LDPL_ERROR,
- "Failed to read archive member of %s at offset %d: %s\n",
- file->name,
- file->offset,
- sys::StrError(errno).c_str());
- free(buf);
+ "LLVM gold plugin has failed to create LTO module: %s",
+ msg);
return LDPS_ERR;
}
- if (!lto_module_is_object_file_in_memory(buf, file->filesize)) {
- free(buf);
- return LDPS_OK;
- }
- } else if (!lto_module_is_object_file(file->name))
return LDPS_OK;
+ }
*claimed = 1;
Modules.resize(Modules.size() + 1);
claimed_file &cf = Modules.back();
- cf.M = buf ? lto_module_create_from_memory(buf, file->filesize) :
- lto_module_create(file->name);
- free(buf);
- if (!cf.M) {
- (*message)(LDPL_ERROR, "Failed to create LLVM module: %s",
- lto_get_error_message());
- return LDPS_ERR;
- }
-
if (!options::triple.empty())
- lto_module_set_target_triple(cf.M, options::triple.c_str());
+ lto_module_set_target_triple(M, options::triple.c_str());
cf.handle = file->handle;
- unsigned sym_count = lto_module_get_num_symbols(cf.M);
+ unsigned sym_count = lto_module_get_num_symbols(M);
cf.syms.reserve(sym_count);
for (unsigned i = 0; i != sym_count; ++i) {
- lto_symbol_attributes attrs = lto_module_get_symbol_attribute(cf.M, i);
+ lto_symbol_attributes attrs = lto_module_get_symbol_attribute(M, i);
if ((attrs & LTO_SYMBOL_SCOPE_MASK) == LTO_SYMBOL_SCOPE_INTERNAL)
continue;
cf.syms.push_back(ld_plugin_symbol());
ld_plugin_symbol &sym = cf.syms.back();
- sym.name = const_cast<char *>(lto_module_get_symbol_name(cf.M, i));
+ sym.name = const_cast<char *>(lto_module_get_symbol_name(M, i));
+ sym.name = strdup(sym.name);
sym.version = NULL;
int scope = attrs & LTO_SYMBOL_SCOPE_MASK;
}
int definition = attrs & LTO_SYMBOL_DEFINITION_MASK;
+ sym.comdat_key = NULL;
switch (definition) {
case LTO_SYMBOL_DEFINITION_REGULAR:
sym.def = LDPK_DEF;
sym.def = LDPK_COMMON;
break;
case LTO_SYMBOL_DEFINITION_WEAK:
+ sym.comdat_key = sym.name;
sym.def = LDPK_WEAKDEF;
break;
case LTO_SYMBOL_DEFINITION_WEAKUNDEF:
return LDPS_ERR;
}
- // LLVM never emits COMDAT.
sym.size = 0;
- sym.comdat_key = NULL;
sym.resolution = LDPR_UNKNOWN;
}
}
}
+ if (code_gen)
+ lto_codegen_add_module(code_gen, M);
+
+ lto_module_dispose(M);
+
return LDPS_OK;
}
/// been overridden by a native object file. Then, perform optimization and
/// codegen.
static ld_plugin_status all_symbols_read_hook(void) {
- lto_code_gen_t cg = lto_codegen_create();
-
- for (std::list<claimed_file>::iterator I = Modules.begin(),
- E = Modules.end(); I != E; ++I)
- lto_codegen_add_module(cg, I->M);
-
std::ofstream api_file;
+ assert(code_gen);
+
if (options::generate_api_file) {
api_file.open("apifile.txt", std::ofstream::out | std::ofstream::trunc);
if (!api_file.is_open()) {
bool anySymbolsPreserved = false;
for (std::list<claimed_file>::iterator I = Modules.begin(),
E = Modules.end(); I != E; ++I) {
+ if (I->syms.empty())
+ continue;
(*get_symbols)(I->handle, I->syms.size(), &I->syms[0]);
for (unsigned i = 0, e = I->syms.size(); i != e; i++) {
if (I->syms[i].resolution == LDPR_PREVAILING_DEF) {
- lto_codegen_add_must_preserve_symbol(cg, I->syms[i].name);
+ lto_codegen_add_must_preserve_symbol(code_gen, I->syms[i].name);
anySymbolsPreserved = true;
if (options::generate_api_file)
if (!anySymbolsPreserved) {
// All of the IL is unnecessary!
- lto_codegen_dispose(cg);
+ lto_codegen_dispose(code_gen);
return LDPS_OK;
}
- lto_codegen_set_pic_model(cg, output_type);
- lto_codegen_set_debug_model(cg, LTO_DEBUG_MODEL_DWARF);
- if (!options::as_path.empty()) {
- sys::Path p = sys::Program::FindProgramByName(options::as_path);
- lto_codegen_set_assembler_path(cg, p.c_str());
- }
- if (!options::as_args.empty()) {
- std::vector<const char *> as_args_p;
- for (std::vector<std::string>::iterator I = options::as_args.begin(),
- E = options::as_args.end(); I != E; ++I) {
- as_args_p.push_back(I->c_str());
- }
- lto_codegen_set_assembler_args(cg, &as_args_p[0], as_args_p.size());
- }
+ lto_codegen_set_pic_model(code_gen, output_type);
+ lto_codegen_set_debug_model(code_gen, LTO_DEBUG_MODEL_DWARF);
if (!options::mcpu.empty())
- lto_codegen_set_cpu(cg, options::mcpu.c_str());
+ lto_codegen_set_cpu(code_gen, options::mcpu.c_str());
// Pass through extra options to the code generator.
if (!options::extra.empty()) {
for (std::vector<std::string>::iterator it = options::extra.begin();
it != options::extra.end(); ++it) {
- lto_codegen_debug_options(cg, (*it).c_str());
+ lto_codegen_debug_options(code_gen, (*it).c_str());
}
}
-
if (options::generate_bc_file != options::BC_NO) {
std::string path;
if (options::generate_bc_file == options::BC_ONLY)
path = options::bc_path;
else
path = output_name + ".bc";
- bool err = lto_codegen_write_merged_modules(cg, path.c_str());
+ bool err = lto_codegen_write_merged_modules(code_gen, path.c_str());
if (err)
(*message)(LDPL_FATAL, "Failed to write the output file.");
if (options::generate_bc_file == options::BC_ONLY)
exit(0);
}
- size_t bufsize = 0;
- const char *buffer = static_cast<const char *>(lto_codegen_compile(cg,
- &bufsize));
-
- std::string ErrMsg;
-
- sys::Path uniqueObjPath("/tmp/llvmgold.o");
- if (uniqueObjPath.createTemporaryFileOnDisk(true, &ErrMsg)) {
- (*message)(LDPL_ERROR, "%s", ErrMsg.c_str());
- return LDPS_ERR;
- }
- tool_output_file objFile(uniqueObjPath.c_str(), ErrMsg,
- raw_fd_ostream::F_Binary);
- if (!ErrMsg.empty()) {
- (*message)(LDPL_ERROR, "%s", ErrMsg.c_str());
- return LDPS_ERR;
+ const char *objPath;
+ if (lto_codegen_compile_to_file(code_gen, &objPath)) {
+ (*message)(LDPL_ERROR, "Could not produce a combined object file\n");
}
- objFile.os().write(buffer, bufsize);
- objFile.os().close();
- if (objFile.os().has_error()) {
- (*message)(LDPL_ERROR, "Error writing output file '%s'",
- uniqueObjPath.c_str());
- objFile.os().clear_error();
- return LDPS_ERR;
+ lto_codegen_dispose(code_gen);
+ for (std::list<claimed_file>::iterator I = Modules.begin(),
+ E = Modules.end(); I != E; ++I) {
+ for (unsigned i = 0; i != I->syms.size(); ++i) {
+ ld_plugin_symbol &sym = I->syms[i];
+ free(sym.name);
+ }
}
- objFile.keep();
- lto_codegen_dispose(cg);
-
- if ((*add_input_file)(uniqueObjPath.c_str()) != LDPS_OK) {
+ if ((*add_input_file)(objPath) != LDPS_OK) {
(*message)(LDPL_ERROR, "Unable to add .o file to the link.");
- (*message)(LDPL_ERROR, "File left behind in: %s", uniqueObjPath.c_str());
+ (*message)(LDPL_ERROR, "File left behind in: %s", objPath);
return LDPS_ERR;
}
return LDPS_ERR;
}
- for (std::vector<std::string>::iterator i = options::pass_through.begin(),
- e = options::pass_through.end();
- i != e; ++i) {
- std::string &item = *i;
- const char *item_p = item.c_str();
- if (llvm::StringRef(item).startswith("-l")) {
- if (add_input_library(item_p + 2) != LDPS_OK) {
- (*message)(LDPL_ERROR, "Unable to add library to the link.");
- return LDPS_ERR;
- }
- } else {
- if (add_input_file(item_p) != LDPS_OK) {
- (*message)(LDPL_ERROR, "Unable to add .o file to the link.");
- return LDPS_ERR;
- }
- }
- }
-
- Cleanup.push_back(uniqueObjPath);
+ if (options::obj_path.empty())
+ Cleanup.push_back(sys::Path(objPath));
return LDPS_OK;
}
projects / oota-llvm.git / blobdiff