//
//===----------------------------------------------------------------------===//
+#include "llvm/Config/config.h"
#include "plugin-api.h"
#include "llvm-c/lto.h"
-#include "llvm/Support/raw_ostream.h"
-#include "llvm/System/Path.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_symbols add_symbols = NULL;
ld_plugin_get_symbols get_symbols = NULL;
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;
- bool generate_api_file = false;
- const char *gcc_path = NULL;
-
struct claimed_file {
- lto_module_t M;
void *handle;
std::vector<ld_plugin_symbol> syms;
};
lto_codegen_model output_type = LTO_CODEGEN_PIC_MODEL_STATIC;
+ std::string output_name = "";
std::list<claimed_file> Modules;
std::vector<sys::Path> Cleanup;
+ lto_code_gen_t code_gen = NULL;
+}
+
+namespace options {
+ enum generate_bc { BC_NO, BC_ALSO, BC_ONLY };
+ static bool generate_api_file = false;
+ static generate_bc generate_bc_file = BC_NO;
+ static std::string bc_path;
+ static std::string obj_path;
+ static std::string extra_library_path;
+ static std::string triple;
+ static std::string mcpu;
+ // Additional options to pass into the code generator.
+ // Note: This array will contain all plugin options which are not claimed
+ // as plugin exclusive to pass to the code generator.
+ // For example, "generate-api-file" and "as"options are for the plugin
+ // use only and will not be passed.
+ static std::vector<std::string> extra;
+
+ static void process_plugin_option(const char* opt_)
+ {
+ if (opt_ == NULL)
+ return;
+ llvm::StringRef opt = opt_;
+
+ if (opt == "generate-api-file") {
+ generate_api_file = true;
+ } else if (opt.startswith("mcpu=")) {
+ mcpu = opt.substr(strlen("mcpu="));
+ } else if (opt.startswith("extra-library-path=")) {
+ extra_library_path = opt.substr(strlen("extra_library_path="));
+ } 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") {
+ generate_bc_file = BC_ALSO;
+ } else if (opt.startswith("also-emit-llvm=")) {
+ llvm::StringRef path = opt.substr(strlen("also-emit-llvm="));
+ generate_bc_file = BC_ALSO;
+ if (!bc_path.empty()) {
+ (*message)(LDPL_WARNING, "Path to the output IL file specified twice. "
+ "Discarding %s", opt_);
+ } else {
+ bc_path = path;
+ }
+ } else {
+ // Save this option to pass to the code generator.
+ extra.push_back(opt);
+ }
+ }
}
-ld_plugin_status claim_file_hook(const ld_plugin_input_file *file,
- int *claimed);
-ld_plugin_status all_symbols_read_hook(void);
-ld_plugin_status cleanup_hook(void);
+static ld_plugin_status claim_file_hook(const ld_plugin_input_file *file,
+ int *claimed);
+static ld_plugin_status all_symbols_read_hook(void);
+static ld_plugin_status cleanup_hook(void);
extern "C" ld_plugin_status onload(ld_plugin_tv *tv);
ld_plugin_status onload(ld_plugin_tv *tv) {
// for services.
bool registeredClaimFile = false;
- bool registeredAllSymbolsRead = false;
- bool registeredCleanup = false;
for (; tv->tv_tag != LDPT_NULL; ++tv) {
switch (tv->tv_tag) {
case LDPT_GOLD_VERSION: // major * 100 + minor
gold_version = tv->tv_u.tv_val;
break;
+ case LDPT_OUTPUT_NAME:
+ output_name = tv->tv_u.tv_string;
+ break;
case LDPT_LINKER_OUTPUT:
switch (tv->tv_u.tv_val) {
case LDPO_REL: // .o
//output_type = LTO_CODEGEN_PIC_MODEL_DYNAMIC_NO_PIC;
break;
case LDPT_OPTION:
- if (strcmp("generate-api-file", tv->tv_u.tv_string) == 0) {
- generate_api_file = true;
- } else if (strncmp("gcc=", tv->tv_u.tv_string, 4) == 0) {
- if (gcc_path) {
- (*message)(LDPL_WARNING, "Path to gcc specified twice. "
- "Discarding %s", tv->tv_u.tv_string);
- } else {
- gcc_path = strdup(tv->tv_u.tv_string + 4);
- }
- } else {
- (*message)(LDPL_WARNING, "Ignoring flag %s", tv->tv_u.tv_string);
- }
+ options::process_plugin_option(tv->tv_u.tv_string);
break;
case LDPT_REGISTER_CLAIM_FILE_HOOK: {
ld_plugin_register_claim_file callback;
if ((*callback)(all_symbols_read_hook) != LDPS_OK)
return LDPS_ERR;
- registeredAllSymbolsRead = true;
+ code_gen = lto_codegen_create();
} break;
case LDPT_REGISTER_CLEANUP_HOOK: {
ld_plugin_register_cleanup callback;
if ((*callback)(cleanup_hook) != LDPS_OK)
return LDPS_ERR;
-
- registeredCleanup = true;
} break;
case LDPT_ADD_SYMBOLS:
add_symbols = tv->tv_u.tv_add_symbols;
case LDPT_ADD_INPUT_FILE:
add_input_file = tv->tv_u.tv_add_input_file;
break;
+ case LDPT_ADD_INPUT_LIBRARY:
+ add_input_library = tv->tv_u.tv_add_input_file;
+ break;
+ 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;
/// claim_file_hook - called by gold to see whether this file is one that
/// our plugin can handle. We'll try to open it and register all the symbols
/// with add_symbol if possible.
-ld_plugin_status claim_file_hook(const ld_plugin_input_file *file,
- int *claimed) {
- void *buf = NULL;
- if (file->offset) {
- // 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, strerror(errno));
- return LDPS_ERR;
- }
- buf = malloc(file->filesize);
- if (!buf) {
- (*message)(LDPL_ERROR,
- "Failed to allocate buffer for archive member of size: %d\n",
- file->filesize);
+static ld_plugin_status claim_file_hook(const ld_plugin_input_file *file,
+ int *claimed) {
+ lto_module_t M;
+
+ if (get_view) {
+ const void *view;
+ if (get_view(file->handle, &view) != LDPS_OK) {
+ (*message)(LDPL_ERROR, "Failed to get a view of %s", file->name);
return LDPS_ERR;
}
- if (read(file->fd, buf, file->filesize) != file->filesize) {
- (*message)(LDPL_ERROR,
- "Failed to read archive member of %s at offset %d: %s\n",
- file->name,
- file->offset,
- strerror(errno));
- free(buf);
+ M = lto_module_create_from_memory(view, file->filesize);
+ } else if (file->offset) {
+ // Gold has found what might be IR part-way inside of a file, such as
+ // an .a archive.
+ M = lto_module_create_from_fd_at_offset(file->fd, file->name, -1,
+ file->filesize, file->offset);
+ } else {
+ M = lto_module_create_from_fd(file->fd, file->name, file->filesize);
+ }
+ if (!M) {
+ if (const char* msg = lto_get_error_message()) {
+ (*message)(LDPL_ERROR, "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(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;
}
/// At this point, we use get_symbols to see if any of our definitions have
/// been overridden by a native object file. Then, perform optimization and
/// codegen.
-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);
-
+static ld_plugin_status all_symbols_read_hook(void) {
std::ofstream api_file;
- if (generate_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()) {
(*message)(LDPL_FATAL, "Unable to open apifile.txt for writing.");
// If we don't preserve any symbols, libLTO will assume that all symbols are
// needed. Keep all symbols unless we're producing a final executable.
- if (output_type == LTO_CODEGEN_PIC_MODEL_STATIC) {
- bool anySymbolsPreserved = false;
- for (std::list<claimed_file>::iterator I = Modules.begin(),
+ bool anySymbolsPreserved = false;
+ for (std::list<claimed_file>::iterator I = Modules.begin(),
E = Modules.end(); I != E; ++I) {
- (*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 ||
- (I->syms[i].def == LDPK_COMMON &&
- I->syms[i].resolution == LDPR_RESOLVED_IR)) {
- lto_codegen_add_must_preserve_symbol(cg, I->syms[i].name);
- anySymbolsPreserved = true;
-
- if (generate_api_file)
- api_file << I->syms[i].name << "\n";
- }
+ 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(code_gen, I->syms[i].name);
+ anySymbolsPreserved = true;
+
+ if (options::generate_api_file)
+ api_file << I->syms[i].name << "\n";
}
}
+ }
- if (generate_api_file)
- api_file.close();
+ if (options::generate_api_file)
+ api_file.close();
- if (!anySymbolsPreserved) {
- // This entire file is unnecessary!
- lto_codegen_dispose(cg);
- return LDPS_OK;
- }
+ if (!anySymbolsPreserved) {
+ // All of the IL is unnecessary!
+ 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 (gcc_path)
- lto_codegen_set_gcc_path(cg, gcc_path);
-
- size_t bufsize = 0;
- const char *buffer = static_cast<const char *>(lto_codegen_compile(cg,
- &bufsize));
+ 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(code_gen, options::mcpu.c_str());
- std::string ErrMsg;
+ // 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(code_gen, (*it).c_str());
+ }
+ }
- sys::Path uniqueObjPath("/tmp/llvmgold.o");
- if (uniqueObjPath.createTemporaryFileOnDisk(true, &ErrMsg)) {
- (*message)(LDPL_ERROR, "%s", ErrMsg.c_str());
- return LDPS_ERR;
+ if (options::generate_bc_file != options::BC_NO) {
+ std::string path;
+ if (options::generate_bc_file == options::BC_ONLY)
+ path = output_name;
+ else if (!options::bc_path.empty())
+ path = options::bc_path;
+ else
+ path = output_name + ".bc";
+ 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);
}
- raw_fd_ostream *objFile = new raw_fd_ostream(uniqueObjPath.c_str(), true,
- ErrMsg);
- if (!ErrMsg.empty()) {
- delete objFile;
- (*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->write(buffer, bufsize);
- objFile->close();
-
- lto_codegen_dispose(cg);
+ 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);
+ }
+ }
- if ((*add_input_file)(const_cast<char*>(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;
+ }
+
+ if (!options::extra_library_path.empty() &&
+ set_extra_library_path(options::extra_library_path.c_str()) != LDPS_OK) {
+ (*message)(LDPL_ERROR, "Unable to set the extra library path.");
return LDPS_ERR;
}
- Cleanup.push_back(uniqueObjPath);
+ if (options::obj_path.empty())
+ Cleanup.push_back(sys::Path(objPath));
return LDPS_OK;
}
-ld_plugin_status cleanup_hook(void) {
+static ld_plugin_status cleanup_hook(void) {
std::string ErrMsg;
for (int i = 0, e = Cleanup.size(); i != e; ++i)
projects / oota-llvm.git / blobdiff