X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=gold%2Fmain.cc;h=db3d1e4430b7835fd51387d2f1951fc56de784e2;hb=8aaaf7577f070c91086533d959ac36a15d1d604f;hp=507e5dd9e6e009b2bba6b327a44bca90b5eaf590;hpb=091244672e9cb571cb7272d491826f85de871ced;p=deliverable%2Fbinutils-gdb.git diff --git a/gold/main.cc b/gold/main.cc index 507e5dd9e6..db3d1e4430 100644 --- a/gold/main.cc +++ b/gold/main.cc @@ -1,6 +1,6 @@ // main.cc -- gold main function. -// Copyright 2006, 2007, 2008 Free Software Foundation, Inc. +// Copyright (C) 2006-2019 Free Software Foundation, Inc. // Written by Ian Lance Taylor . // This file is part of gold. @@ -22,57 +22,183 @@ #include "gold.h" +#include +#include + #ifdef HAVE_MALLINFO #include #endif + #include "libiberty.h" #include "script.h" #include "options.h" +#include "target-select.h" #include "parameters.h" #include "errors.h" +#include "mapfile.h" #include "dirsearch.h" #include "workqueue.h" #include "object.h" +#include "archive.h" #include "symtab.h" #include "layout.h" +#include "plugin.h" +#include "gc.h" +#include "icf.h" +#include "incremental.h" +#include "gdb-index.h" +#include "timer.h" using namespace gold; +// This function emits the commandline to a hard-coded file in temp. +// This is useful for debugging since ld is typically invoked by gcc, +// so its commandline is not always easy to extract. You should be +// able to run 'gcc -B... foo.o -o foo' to invoke this linker the +// first time, and then /tmp/ld-run-foo.sh to invoke it on subsequent +// runes. "/tmp/ld-run-foo.sh debug" will run the linker inside gdb +// (or whatever value the environment variable GDB is set to), for +// even easier debugging. Since this is a debugging-only tool, and +// creates files, it is only turned on when the user explicitly asks +// for it, by compiling with -DDEBUG. Do not do this for release +// versions of the linker! + +#ifdef DEBUG +#include +#include // for chmod() + +static std::string +collect_argv(int argc, char** argv) +{ + // This is used by write_debug_script(), which wants the unedited argv. + std::string args; + for (int i = 0; i < argc; ++i) + { + args.append(" '"); + // Now append argv[i], but with all single-quotes escaped + const char* argpos = argv[i]; + while (1) + { + const int len = strcspn(argpos, "'"); + args.append(argpos, len); + if (argpos[len] == '\0') + break; + args.append("'\"'\"'"); + argpos += len + 1; + } + args.append("'"); + } + return args; +} + +static void +write_debug_script(std::string filename_str, + const char* argv_0, const char* args) +{ + size_t slash = filename_str.rfind('/'); + if (slash != std::string::npos) + filename_str = filename_str.c_str() + slash + 1; + filename_str = std::string("/tmp/ld-run-") + filename_str + ".sh"; + const char* filename = filename_str.c_str(); + FILE* fp = fopen(filename, "w"); + if (fp) + { + fprintf(fp, "[ \"$1\" = debug ]" + " && PREFIX=\"${GDB-gdb} --annotate=3 --fullname %s --args\"" + " && shift\n", + argv_0); + fprintf(fp, "$PREFIX%s $*\n", args); + fclose(fp); + chmod(filename, 0755); + } + else + filename = "[none]"; + fprintf(stderr, "Welcome to gold! Commandline written to %s.\n", filename); + fflush(stderr); +} + +#else // !defined(DEBUG) + +static inline std::string +collect_argv(int, char**) +{ + return ""; +} + +static inline void +write_debug_script(std::string, const char*, const char*) +{ +} + +#endif // !defined(DEBUG) + + int main(int argc, char** argv) { #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES) - setlocale (LC_MESSAGES, ""); + setlocale(LC_MESSAGES, ""); #endif #if defined (HAVE_SETLOCALE) - setlocale (LC_CTYPE, ""); + setlocale(LC_CTYPE, ""); #endif - bindtextdomain (PACKAGE, LOCALEDIR); - textdomain (PACKAGE); + bindtextdomain(PACKAGE, LOCALEDIR); + textdomain(PACKAGE); program_name = argv[0]; + // In libiberty; expands @filename to the args in "filename". + expandargv(&argc, &argv); + + // This is used by write_debug_script(), which wants the unedited argv. + std::string args = collect_argv(argc, argv); + Errors errors(program_name); // Initialize the global parameters, to let random code get to the // errors object. - initialize_parameters(&errors); - - // Options which may be set by the command line or by linker - // scripts. - Script_options script_options; + set_parameters_errors(&errors); // Handle the command line options. - Command_line command_line(&script_options); - command_line.process(argc - 1, argv + 1); + Command_line command_line; + command_line.process(argc - 1, const_cast(argv + 1)); - long start_time = 0; - if (command_line.options().print_stats()) - start_time = get_run_time(); + Timer timer; + if (command_line.options().stats()) + { + timer.start(); + set_parameters_timer(&timer); + } // Store some options in the globally accessible parameters. - set_parameters_from_options(&command_line.options()); + set_parameters_options(&command_line.options()); + + // Do this as early as possible (since it prints a welcome message). + write_debug_script(command_line.options().output_file_name(), + program_name, args.c_str()); + + // If the user asked for a map file, open it. + Mapfile* mapfile = NULL; + if (command_line.options().user_set_Map()) + { + mapfile = new Mapfile(); + if (!mapfile->open(command_line.options().Map())) + { + delete mapfile; + mapfile = NULL; + } + } + + // The GNU linker ignores version scripts when generating + // relocatable output. If we are not compatible, then we break the + // Linux kernel build, which uses a linker script with -r which must + // not force symbols to be local. It would actually be useful to + // permit symbols to be forced local with -r, though, as it would + // permit some linker optimizations. Perhaps we need yet another + // option to control this. FIXME. + if (parameters->options().relocatable()) + command_line.script_options().version_script_info()->clear(); // The work queue. Workqueue workqueue(command_line.options()); @@ -80,44 +206,127 @@ main(int argc, char** argv) // The list of input objects. Input_objects input_objects; + // The Garbage Collection (GC, --gc-sections) Object. + Garbage_collection gc; + + // The Identical Code Folding (ICF, --icf) Object. + Icf icf; + // The symbol table. We're going to guess here how many symbols // we're going to see based on the number of input files. Even when - // this is off, it means at worse we don't quite optimize hashtable - // resizing as well as we could have (perhap using more memory). + // this is off, it means at worst we don't quite optimize hashtable + // resizing as well as we could have (perhaps using more memory). Symbol_table symtab(command_line.number_of_input_files() * 1024, - command_line.options().version_script()); + command_line.version_script()); + + if (parameters->options().gc_sections()) + symtab.set_gc(&gc); + + if (parameters->options().icf_enabled()) + symtab.set_icf(&icf); // The layout object. - Layout layout(command_line.options(), &script_options); + Layout layout(command_line.number_of_input_files(), + &command_line.script_options()); + + if (layout.incremental_inputs() != NULL) + layout.incremental_inputs()->report_command_line(argc, argv); + + if (parameters->options().section_ordering_file()) + layout.read_layout_from_file(); + + // Load plugin libraries. + if (command_line.options().has_plugins()) + command_line.options().plugins()->load_plugins(&layout); // Get the search path from the -L options. Dirsearch search_path; - search_path.initialize(&workqueue, &command_line.options().search_path()); + search_path.initialize(&workqueue, &command_line.options().library_path()); // Queue up the first set of tasks. queue_initial_tasks(command_line.options(), search_path, command_line, &workqueue, &input_objects, - &symtab, &layout); + &symtab, &layout, mapfile); // Run the main task processing loop. workqueue.process(0); - if (command_line.options().print_stats()) + if (command_line.options().print_output_format()) + print_output_format(); + + if (command_line.options().stats()) { - long run_time = get_run_time() - start_time; - fprintf(stderr, _("%s: total run time: %ld.%06ld seconds\n"), - program_name, run_time / 1000000, run_time % 1000000); + timer.stamp(2); + Timer::TimeStats elapsed = timer.get_pass_time(0); + fprintf(stderr, + _("%s: initial tasks run time: " \ + "(user: %ld.%06ld sys: %ld.%06ld wall: %ld.%06ld)\n"), + program_name, + elapsed.user / 1000, (elapsed.user % 1000) * 1000, + elapsed.sys / 1000, (elapsed.sys % 1000) * 1000, + elapsed.wall / 1000, (elapsed.wall % 1000) * 1000); + elapsed = timer.get_pass_time(1); + fprintf(stderr, + _("%s: middle tasks run time: " \ + "(user: %ld.%06ld sys: %ld.%06ld wall: %ld.%06ld)\n"), + program_name, + elapsed.user / 1000, (elapsed.user % 1000) * 1000, + elapsed.sys / 1000, (elapsed.sys % 1000) * 1000, + elapsed.wall / 1000, (elapsed.wall % 1000) * 1000); + elapsed = timer.get_pass_time(2); + fprintf(stderr, + _("%s: final tasks run time: " \ + "(user: %ld.%06ld sys: %ld.%06ld wall: %ld.%06ld)\n"), + program_name, + elapsed.user / 1000, (elapsed.user % 1000) * 1000, + elapsed.sys / 1000, (elapsed.sys % 1000) * 1000, + elapsed.wall / 1000, (elapsed.wall % 1000) * 1000); + elapsed = timer.get_elapsed_time(); + fprintf(stderr, + _("%s: total run time: " \ + "(user: %ld.%06ld sys: %ld.%06ld wall: %ld.%06ld)\n"), + program_name, + elapsed.user / 1000, (elapsed.user % 1000) * 1000, + elapsed.sys / 1000, (elapsed.sys % 1000) * 1000, + elapsed.wall / 1000, (elapsed.wall % 1000) * 1000); + #ifdef HAVE_MALLINFO struct mallinfo m = mallinfo(); - fprintf(stderr, _("%s: total space allocated by malloc: %d bytes\n"), - program_name, m.arena); + fprintf(stderr, _("%s: total space allocated by malloc: %lld bytes\n"), + program_name, static_cast(m.arena)); #endif File_read::print_stats(); + Archive::print_stats(); + Lib_group::print_stats(); fprintf(stderr, _("%s: output file size: %lld bytes\n"), program_name, static_cast(layout.output_file_size())); symtab.print_stats(); layout.print_stats(); + Gdb_index::print_stats(); + Free_list::print_stats(); } - gold_exit(errors.error_count() == 0); + // Issue defined symbol report. + if (command_line.options().user_set_print_symbol_counts()) + input_objects.print_symbol_counts(&symtab); + + // Output cross reference table. + if (command_line.options().cref()) + input_objects.print_cref(&symtab, + mapfile == NULL ? stdout : mapfile->file()); + + if (mapfile != NULL) + mapfile->close(); + + if (parameters->options().fatal_warnings() + && errors.warning_count() > 0 + && errors.error_count() == 0) + gold_error("treating warnings as errors"); + + // If the user used --noinhibit-exec, we force the exit status to be + // successful. This is compatible with GNU ld. + gold_exit((errors.error_count() == 0 + || parameters->options().noinhibit_exec()) + ? GOLD_OK + : GOLD_ERR); }