forked from Imagelibrary/binutils-gdb
bf803c840c
At the beginning of a session, gdb may attempt to download debuginfo for all shared libraries associated with the process or core file being debugged. This can be a waste of time and storage space when much of the debuginfo ends up not being used during the session. To reduce the gdb's startup latency and to download only the debuginfo that is really needed, this patch adds on-demand, a.k.a lazy, downloading. When 'set debuginfo enabled lazy' is on, gdb will attempt to download a .gdb_index for each shared library instead of its full debuginfo. Each debuginfo download will be deferred until gdb needs to expand symtabs associated with the debuginfo's index. Additionally, all separate debug objfiles are placed in objfiles_list after their parent, instead of before. This ensures that any deferred debuginfo downloaded during iteration over objfiles_list aren't skipped by the loop. I also modified objfiles_safe so that it returns a safe reverse iterator. Reverse iteration prevents iterator invalidation by ensuring that separate debug objfiles are deleted before their parent objfile.
51 lines
1.6 KiB
C
51 lines
1.6 KiB
C
/* Public API for gdb DWARF reader
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Copyright (C) 2021-2023 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 DWARF2_PUBLIC_H
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#define DWARF2_PUBLIC_H
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extern bool dwarf2_has_info (struct objfile *,
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const struct dwarf2_debug_sections *,
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bool = false);
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/* A DWARF names index variant. */
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enum class dw_index_kind
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{
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/* GDB's own .gdb_index format. */
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GDB_INDEX,
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/* DWARF5 .debug_names. */
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DEBUG_NAMES,
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};
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/* Initialize for reading DWARF for OBJFILE, and push the appropriate
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entry on the objfile's "qf" list. */
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extern void dwarf2_initialize_objfile (struct objfile *objfile);
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extern void dwarf2_build_frame_info (struct objfile *);
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/* Query debuginfod for the .gdb_index associated with OBJFILE. If
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successful, create an objfile to hold the .gdb_index information
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and act as a placeholder until the full debuginfo needs to be
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downloaded. */
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extern bool dwarf2_has_separate_index (struct objfile *);
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#endif /* DWARF2_PUBLIC_H */
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