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Add plugin functionality for link-time optimization (LTO).
include/: * plugin-api.h: New file. gold/: * configure.ac (plugins): Add --enable-plugins option. * configure: Regenerate. * config.in: Regenerate. * Makefile.am (LIBDL): New variable. (CCFILES): Add plugin.cc. (HFILES): Add plugin.h. (ldadd_var): Add LIBDL. * Makefile.in: Regenerate. * archive.cc: Include "plugin.h". (Archive::setup): Don't preread archive symbols when using a plugin. (Archive::get_file_and_offset): Add memsize parameter. Change callers. (Archive::get_elf_object_for_member): Call plugin hooks for claiming files. (Archive::include_member): Add symbols from plugin objects. * archive.h (Archive::get_file_and_offset): Add memsize parameter. * descriptors.cc (Descriptors::open): Check for file descriptors abandoned by plugins. (Descriptors::claim_for_plugin): New function. * descriptors.h (Descriptors::claim_for_plugin): New function. (Open_descriptor::is_claimed): New field. (claim_descriptor_for_plugin): New function. * fileread.cc (File_read::claim_for_plugin): New function. * fileread.h (File_read::claim_for_plugin): New function. (File_read::descriptor): New function. * gold.cc: Include "plugin.h". (queue_initial_tasks): Add task to call plugin hooks for generating new object files. * main.cc: Include "plugin.h". (main): Load plugin libraries. * object.h (Pluginobj): Declare. (Object::pluginobj): New function. (Object::do_pluginobj): New function. (Object::set_target): New function. * options.cc: Include "plugin.h". (General_options::parse_plugin): New function. (General_options::General_options): Initialize plugins_ field. (General_options::add_plugin): New function. * options.h (Plugin_manager): Declare. (General_options): Add --plugin option. (General_options::has_plugins): New function. (General_options::plugins): New function. (General_options::add_plugin): New function. (General_options::plugins_): New field. * plugin.cc: New file. * plugin.h: New file. * readsyms.cc: Include "plugin.h". (Read_symbols::do_read_symbols): Check for archive before checking for ELF file. Call plugin hooks to claim files. * resolve.cc (Symbol_table::resolve): Record when symbol is referenced from a real object file; force override when processing replacement files. * symtab.cc (Symbol::init_fields): Initialize in_real_elf_ field. (Symbol::init_base_object): Likewise. (Symbol::init_base_output_data): Likewise. (Symbol::init_base_output_segment): Likewise. (Symbol::init_base_constant): Likewise. (Symbol::init_base_undefined): Likewise. (Symbol::output_section): Assert that object is not a plugin. (Symbol_table::add_from_pluginobj): New function. (Symbol_table::sized_finalize_symbol): Treat symbols from plugins as undefined. (Symbol_table::sized_write_globals): Likewise. (Symbol_table::add_from_pluginobj): Instantiate template. * symtab.h (Sized_pluginobj): Declare. (Symbol::in_real_elf): New function. (Symbol::set_in_real_elf): New function. (Symbol::in_real_elf_): New field. (Symbol_table::add_from_pluginobj): New function. * testsuite/Makefile.am (AM_CFLAGS): New variable. (LIBDL): New variable. (LDADD): Add LIBDL. (check_PROGRAMS): Add plugin_test_1 and plugin_test_2. (check_SCRIPTS): Add plugin_test_1.sh and plugin_test_2.sh. (check_DATA): Add plugin_test_1.err and plugin_test_2.err. (MOSTLYCLEANFILES): Likewise. * testsuite/Makefile.in: Regenerate. * testsuite/plugin_test.c: New file. * testsuite/plugin_test_1.sh: New file. * testsuite/plugin_test_2.sh: New file.
This commit is contained in:
Cary Coutant
@ -1,3 +1,88 @@
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2008-09-19 Cary Coutant <ccoutant@google.com>
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Add plugin functionality for link-time optimization (LTO).
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* configure.ac (plugins): Add --enable-plugins option.
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* configure: Regenerate.
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* config.in: Regenerate.
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* Makefile.am (LIBDL): New variable.
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(CCFILES): Add plugin.cc.
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(HFILES): Add plugin.h.
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(ldadd_var): Add LIBDL.
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* Makefile.in: Regenerate.
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* archive.cc: Include "plugin.h".
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(Archive::setup): Don't preread archive symbols when using a plugin.
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(Archive::get_file_and_offset): Add memsize parameter. Change callers.
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(Archive::get_elf_object_for_member): Call plugin hooks for claiming
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files.
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(Archive::include_member): Add symbols from plugin objects.
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* archive.h (Archive::get_file_and_offset): Add memsize parameter.
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* descriptors.cc (Descriptors::open): Check for file descriptors
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abandoned by plugins.
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(Descriptors::claim_for_plugin): New function.
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* descriptors.h (Descriptors::claim_for_plugin): New function.
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(Open_descriptor::is_claimed): New field.
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(claim_descriptor_for_plugin): New function.
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* fileread.cc (File_read::claim_for_plugin): New function.
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* fileread.h (File_read::claim_for_plugin): New function.
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(File_read::descriptor): New function.
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* gold.cc: Include "plugin.h".
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(queue_initial_tasks): Add task to call plugin hooks for generating
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new object files.
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* main.cc: Include "plugin.h".
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(main): Load plugin libraries.
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* object.h (Pluginobj): Declare.
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(Object::pluginobj): New function.
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(Object::do_pluginobj): New function.
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(Object::set_target): New function.
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* options.cc: Include "plugin.h".
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(General_options::parse_plugin): New function.
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(General_options::General_options): Initialize plugins_ field.
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(General_options::add_plugin): New function.
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* options.h (Plugin_manager): Declare.
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(General_options): Add --plugin option.
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(General_options::has_plugins): New function.
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(General_options::plugins): New function.
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(General_options::add_plugin): New function.
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(General_options::plugins_): New field.
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* plugin.cc: New file.
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* plugin.h: New file.
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* readsyms.cc: Include "plugin.h".
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(Read_symbols::do_read_symbols): Check for archive before checking
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for ELF file. Call plugin hooks to claim files.
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* resolve.cc (Symbol_table::resolve): Record when symbol is referenced
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from a real object file; force override when processing replacement
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files.
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* symtab.cc (Symbol::init_fields): Initialize in_real_elf_ field.
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(Symbol::init_base_object): Likewise.
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(Symbol::init_base_output_data): Likewise.
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(Symbol::init_base_output_segment): Likewise.
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(Symbol::init_base_constant): Likewise.
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(Symbol::init_base_undefined): Likewise.
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(Symbol::output_section): Assert that object is not a plugin.
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(Symbol_table::add_from_pluginobj): New function.
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(Symbol_table::sized_finalize_symbol): Treat symbols from plugins as
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undefined.
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(Symbol_table::sized_write_globals): Likewise.
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(Symbol_table::add_from_pluginobj): Instantiate template.
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* symtab.h (Sized_pluginobj): Declare.
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(Symbol::in_real_elf): New function.
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(Symbol::set_in_real_elf): New function.
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(Symbol::in_real_elf_): New field.
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(Symbol_table::add_from_pluginobj): New function.
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* testsuite/Makefile.am (AM_CFLAGS): New variable.
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(LIBDL): New variable.
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(LDADD): Add LIBDL.
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(check_PROGRAMS): Add plugin_test_1 and plugin_test_2.
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(check_SCRIPTS): Add plugin_test_1.sh and plugin_test_2.sh.
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(check_DATA): Add plugin_test_1.err and plugin_test_2.err.
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(MOSTLYCLEANFILES): Likewise.
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* testsuite/Makefile.in: Regenerate.
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* testsuite/plugin_test.c: New file.
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* testsuite/plugin_test_1.sh: New file.
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* testsuite/plugin_test_2.sh: New file.
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2008-09-16 Ian Lance Taylor <iant@google.com>
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* target-reloc.h (relocate_section): Check whether a symbol is
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