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9018be22e0
This patch started by changing target_read_alloc_1 to return a byte_vector, to avoid manual memory management (in target_read_alloc_1 and in the callers). To communicate failures to the callers, it actually returns a gdb::optional<gdb::byte_vector>. Adjusting target_read_stralloc was a bit more tricky, since it wants to return a buffer of char, and not gdb_byte. Since you can't just cast a gdb::byte_vector into a gdb::def_vector<char>, I made target_read_alloc_1 templated, so both versions (that return vectors of gdb_byte and char) are generated. Since target_read_stralloc now returns a gdb::char_vector instead of a gdb::unique_xmalloc_ptr<char>, a few callers need to be adjusted. gdb/ChangeLog: * common/byte-vector.h (char_vector): New type. * target.h (target_read_alloc): Return gdb::optional<byte_vector>. (target_read_stralloc): Return gdb::optional<char_vector>. (target_get_osdata): Return gdb::optional<char_vector>. * target.c (target_read_alloc_1): Templatize. Replacement manual memory management with vector. (target_read_alloc): Change return type, adjust. (target_read_stralloc): Change return type, adjust. (target_get_osdata): Change return type, adjust. * auxv.c (struct auxv_info) <length>: Remove. <data>: Change type to gdb::optional<byte_vector>. (auxv_inferior_data_cleanup): Free auxv_info with delete. (get_auxv_inferior_data): Allocate auxv_info with new, adjust. (target_auxv_search): Adjust. (fprint_target_auxv): Adjust. * avr-tdep.c (avr_io_reg_read_command): Adjust. * linux-tdep.c (linux_spu_make_corefile_notes): Adjust. (linux_make_corefile_notes): Adjust. * osdata.c (get_osdata): Adjust. * remote.c (remote_get_threads_with_qxfer): Adjust. (remote_memory_map): Adjust. (remote_traceframe_info): Adjust. (btrace_read_config): Adjust. (remote_read_btrace): Adjust. (remote_pid_to_exec_file): Adjust. * solib-aix.c (solib_aix_get_library_list): Adjust. * solib-dsbt.c (decode_loadmap): Don't free buf. (dsbt_get_initial_loadmaps): Adjust. * solib-svr4.c (svr4_current_sos_via_xfer_libraries): Adjust. * solib-target.c (solib_target_current_sos): Adjust. * tracepoint.c (sdata_make_value): Adjust. * xml-support.c (xinclude_start_include): Adjust. (xml_fetch_content_from_file): Adjust. * xml-support.h (xml_fetch_another): Change return type. (xml_fetch_content_from_file): Change return type. * xml-syscall.c (xml_init_syscalls_info): Adjust. * xml-tdesc.c (file_read_description_xml): Adjust. (fetch_available_features_from_target): Change return type. (target_fetch_description_xml): Adjust. (target_read_description_xml): Adjust.
64 lines
2.2 KiB
C++
64 lines
2.2 KiB
C++
/* Copyright (C) 2017-2018 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#ifndef COMMON_BYTE_VECTOR_H
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#define COMMON_BYTE_VECTOR_H
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#include "common/def-vector.h"
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namespace gdb {
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/* byte_vector is a gdb_byte std::vector with a custom allocator that
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unlike std::vector<gdb_byte> does not zero-initialize new elements
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by default when the vector is created/resized. This is what you
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usually want when working with byte buffers, since if you're
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creating or growing a buffer you'll most surely want to fill it in
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with data, in which case zero-initialization would be a
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pessimization. For example:
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gdb::byte_vector buf (some_large_size);
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fill_with_data (buf.data (), buf.size ());
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On the odd case you do need zero initialization, then you can still
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call the overloads that specify an explicit value, like:
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gdb::byte_vector buf (some_initial_size, 0);
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buf.resize (a_bigger_size, 0);
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(Or use std::vector<gdb_byte> instead.)
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Note that unlike std::vector<gdb_byte>, function local
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gdb::byte_vector objects constructed with an initial size like:
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gdb::byte_vector buf (some_size);
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fill_with_data (buf.data (), buf.size ());
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usually compile down to the exact same as:
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std::unique_ptr<byte[]> buf (new gdb_byte[some_size]);
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fill_with_data (buf.get (), some_size);
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with the former having the advantage of being a bit more readable,
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and providing the whole std::vector API, if you end up needing it.
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*/
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using byte_vector = gdb::def_vector<gdb_byte>;
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using char_vector = gdb::def_vector<char>;
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} /* namespace gdb */
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#endif /* COMMON_DEF_VECTOR_H */
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