binutils-gdb/gdb/windows-tdep.h
Hannes Domani c162ed3e66 Cache the text section offset of shared libraries
Each time a dll is loaded, update_solib_list is called.
This in turn calls deep down xfer_partial -> windows_xfer_shared_libraries,
which calls windows_xfer_shared_library for each loaded dll,
and pe_text_section_offset reads the dll for the text section offset.

Also if the data provided by xfer_partial is bigger than 4K,
then all of this is done for each 4K chunk (see target_read_alloc_1).

Caching of the text section offset improves the startup time of
an application with >300 dynamically loaded plugins from 2m10s to 10s.
And the shutdown time improves from 2m to 2s.

gdb/ChangeLog:

2020-01-23  Hannes Domani  <ssbssa@yahoo.de>

	* i386-cygwin-tdep.c (core_process_module_section): Update.
	* windows-nat.c (struct lm_info_windows): Add text_offset.
	(windows_xfer_shared_libraries): Update.
	* windows-tdep.c (windows_xfer_shared_library):
	Add text_offset_cached argument.
	* windows-tdep.h (windows_xfer_shared_library): Update.
2020-01-23 18:44:27 +01:00

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C

/* Copyright (C) 2008-2020 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#ifndef WINDOWS_TDEP_H
#define WINDOWS_TDEP_H
struct obstack;
struct gdbarch;
extern struct cmd_list_element *info_w32_cmdlist;
extern void init_w32_command_list (void);
extern void windows_xfer_shared_library (const char* so_name,
CORE_ADDR load_addr,
CORE_ADDR *text_offset_cached,
struct gdbarch *gdbarch,
struct obstack *obstack);
extern void windows_init_abi (struct gdbarch_info info,
struct gdbarch *gdbarch);
#endif