* NEWS: Document new options "set/show use-deprecated-index-sections",
and delete reference to --use-deprecated-index-sections. * symfile.h (use_deprecated_index_sections): Delete. * dwarf2read.c (use_deprecated_index_sections): Make static. (read_index_from_section): Update wording of how to load deprecated index sections. (_initialize_dwarf2_read): New options "set/show use-deprecated-index-sections". * main.c (captured_main): Delete --use-deprecated-index-sections. doc/ * gdb.texinfo (Mode Options): Delete --use-deprecated-index-sections. (Index Files): Document how to control the use of deprecated index sections. (Index Section Format): Replace --use-deprecated-index-sections with "set use-deprecated-index-sections on".
This commit is contained in:
Doug Evans
parent
64776a0b2d
commit
e615022aba
7 changed files with 71 additions and 23 deletions
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@ -1,3 +1,15 @@
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2012-07-20 Doug Evans <dje@google.com>
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* NEWS: Document new options "set/show use-deprecated-index-sections",
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and delete reference to --use-deprecated-index-sections.
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* symfile.h (use_deprecated_index_sections): Delete.
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* dwarf2read.c (use_deprecated_index_sections): Make static.
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(read_index_from_section): Update wording of how to load
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deprecated index sections.
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(_initialize_dwarf2_read): New options
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"set/show use-deprecated-index-sections".
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* main.c (captured_main): Delete --use-deprecated-index-sections.
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2012-07-20 Pedro Alves <palves@redhat.com>
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PR threads/11692
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14
gdb/NEWS
14
gdb/NEWS
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@ -114,11 +114,11 @@
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* The .gdb_index section has been updated to include symbols for
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inlined functions. GDB will ignore older .gdb_index sections by
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default, which could cause symbol files to be loaded more slowly
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until their .gdb_index sections can be recreated. The new option
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--use-deprecated-index-sections will cause GDB to use any older
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.gdb_index sections it finds. This will restore performance, but
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the ability to set breakpoints on inlined functions will be lost
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in symbol files with older .gdb_index sections.
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until their .gdb_index sections can be recreated. The new command
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"set use-deprecated-index-sections on" will cause GDB to use any older
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.gdb_index sections it finds. This will restore performance, but the
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ability to set breakpoints on inlined functions will be lost in symbol
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files with older .gdb_index sections.
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The .gdb_index section has also been updated to record more information
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about each symbol. This speeds up the "info variables", "info functions"
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@ -139,6 +139,10 @@
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* New commands
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** "set use-deprecated-index-sections on|off"
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"show use-deprecated-index-sections on|off"
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Controls the use of deprecated .gdb_index sections.
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** "catch load" and "catch unload" can be used to stop when a shared
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library is loaded or unloaded, respectively.
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@ -1,3 +1,11 @@
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2012-07-20 Doug Evans <dje@google.com>
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* gdb.texinfo (Mode Options): Delete --use-deprecated-index-sections.
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(Index Files): Document how to control the use of deprecated index
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sections.
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(Index Section Format): Replace --use-deprecated-index-sections with
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"set use-deprecated-index-sections on".
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2012-07-12 Eli Zaretskii <eliz@gnu.org>
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* gdbint.texinfo: Remove @syncodeindex directives that put all the
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@ -1247,13 +1247,6 @@ memory usage after it completes each command and returns to the prompt.
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This option causes @value{GDBN} to print its version number and
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no-warranty blurb, and exit.
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@item -use-deprecated-index-sections
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@cindex @code{--use-deprecated-index-sections}
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This option causes @value{GDBN} to read and use deprecated
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@samp{.gdb_index} sections from symbol files. This can speed up
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startup, but may result in some functionality being lost.
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@xref{Index Section Format}.
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@end table
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@node Startup
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@ -16753,6 +16746,28 @@ $ objcopy --add-section .gdb_index=symfile.gdb-index \
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--set-section-flags .gdb_index=readonly symfile symfile
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@end smallexample
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@value{GDBN} will normally ignore older versions of @file{.gdb_index}
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sections that have been deprecated. Usually they are deprecated because
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they are missing a new feature or have performance issues.
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To tell @value{GDBN} to use a deprecated index section anyway
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specify @code{set use-deprecated-index-sections on}.
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The default is @code{off}.
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This can speed up startup, but may result in some functionality being lost.
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@xref{Index Section Format}.
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@emph{Warning:} Setting @code{use-deprecated-index-sections} to @code{on}
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must be done before gdb reads the file. The following will not work:
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@smallexample
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$ gdb -ex "set use-deprecated-index-sections on" <program>
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@end smallexample
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Instead you must do, for example,
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@smallexample
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$ gdb -iex "set use-deprecated-index-sections on" <program>
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@end smallexample
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There are currently some limitation on indices. They only work when
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for DWARF debugging information, not stabs. And, they do not
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currently work for programs using Ada.
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@ -40408,7 +40423,7 @@ Version 4 uses a different hashing function from versions 5 and 6.
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Version 6 includes symbols for inlined functions, whereas versions 4
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and 5 do not. Version 7 adds attributes to the CU indices in the
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symbol table. @value{GDBN} will only read version 4, 5, or 6 indices
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if the @code{--use-deprecated-index-sections} option is used.
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by specifying @code{set use-deprecated-index-sections on}.
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@item
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The offset, from the start of the file, of the CU list.
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@ -85,7 +85,7 @@ static int dwarf2_die_debug = 0;
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static int check_physname = 0;
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/* When non-zero, do not reject deprecated .gdb_index sections. */
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int use_deprecated_index_sections = 0;
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static int use_deprecated_index_sections = 0;
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/* When set, the file that we're processing is known to have debugging
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info for C++ namespaces. GCC 3.3.x did not produce this information,
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@ -2611,15 +2611,17 @@ read_index_from_section (struct objfile *objfile,
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Versions earlier than 6 did not emit psymbols for inlined
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functions. Using these files will cause GDB not to be able to
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set breakpoints on inlined functions by name, so we ignore these
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indices unless the --use-deprecated-index-sections command line
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option was supplied. */
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indices unless the user has done
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"set use-deprecated-index-sections on". */
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if (version < 6 && !deprecated_ok)
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{
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static int warning_printed = 0;
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if (!warning_printed)
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{
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warning (_("Skipping deprecated .gdb_index section in %s, pass "
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"--use-deprecated-index-sections to use them anyway"),
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warning (_("\
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Skipping deprecated .gdb_index section in %s.\n\
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Do \"set use-deprecated-index-sections on\" before the file is read\n\
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to use the section anyway."),
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filename);
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warning_printed = 1;
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}
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@ -19655,6 +19657,18 @@ the demangler."),
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NULL, show_check_physname,
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&setdebuglist, &showdebuglist);
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add_setshow_boolean_cmd ("use-deprecated-index-sections",
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no_class, &use_deprecated_index_sections, _("\
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Set whether to use deprecated gdb_index sections."), _("\
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Show whether to use deprecated gdb_index sections."), _("\
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When enabled, deprecated .gdb_index sections are used anyway.\n\
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Normally they are ignored either because of a missing feature or\n\
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performance issue.\n\
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Warning: This option must be enabled before gdb reads the file."),
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NULL,
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NULL,
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&setlist, &showlist);
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c = add_cmd ("gdb-index", class_files, save_gdb_index_command,
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_("\
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Save a gdb-index file.\n\
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@ -471,8 +471,6 @@ captured_main (void *data)
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{"args", no_argument, &set_args, 1},
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{"l", required_argument, 0, 'l'},
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{"return-child-result", no_argument, &return_child_result, 1},
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{"use-deprecated-index-sections", no_argument,
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&use_deprecated_index_sections, 1},
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{0, no_argument, 0, 0}
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};
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@ -673,9 +673,6 @@ extern void dwarf2_build_frame_info (struct objfile *);
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void dwarf2_free_objfile (struct objfile *);
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/* Whether to use deprecated .gdb_index sections. */
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extern int use_deprecated_index_sections;
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/* From mdebugread.c */
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/* Hack to force structures to exist before use in parameter list. */
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