From 0d3abd8cc936360f8c46502135edd2e646473438 Mon Sep 17 00:00:00 2001 From: Andrew Burgess Date: Wed, 12 Jun 2019 22:34:26 +0100 Subject: [PATCH] gdb: Remove an update of current_source_line and current_source_symtab While reviewing some of the annotation code I noticed that identify_source_line (in source.c) sets current_source_line, current_source_symtab, and also calls clear_lines_listed_range. This seems a little strange, identify_source_line is really a wrapper around annotate_source, and is only called when annotation_level is greater than 0 (so annotations are turned on). It seems weird (to me) that when annotations are on we update GDB's idea of the "current" line/symtab, but when they are off we don't, given that annotations are really about communicating GDB's state to a user (GUI) and surely shouldn't be changing GDB's behaviour. This commit removes from identify_source_line all of the setting of current line/symtab and the call to clear_lines_listed_range, after doing this GDB still passes all tests, so I don't believe these lines were actually required. With this code removed identify_source_line is only a wrapper around annotate_source, so I moved identify_source_line to annotate.c and renamed it to annotate_source_line. gdb/ChangeLog: * annotate.c: Add 'source.h' and 'objfiles.h' includes. (annotate_source): Make static. (annotate_source_line): Moved from source.c and renamed from identify_source_line. Update the return type. * annotate.h (annotate_source): Delete declaration. (annotate_source_line): Declaration moved from source.h, and renamed from identify_source_line. Return type updated. * source.c (identify_source_line): Moved to annotate.c and renamed to annotate_source_line. (info_line_command): Remove check of annotation_level. * source.h (identify_source_line): Move declaration to annotate.h and rename to annotate_source_line. * stack.c: Add 'annotate.h' include. (print_frame_info): Remove check of annotation_level before calling annotate_source_line. --- gdb/ChangeLog | 18 ++++++++++++++++++ gdb/annotate.c | 29 ++++++++++++++++++++++++++++- gdb/annotate.h | 13 +++++++++++-- gdb/source.c | 27 ++------------------------- gdb/source.h | 11 ----------- gdb/stack.c | 7 +++---- 6 files changed, 62 insertions(+), 43 deletions(-) diff --git a/gdb/ChangeLog b/gdb/ChangeLog index cb81983..f0489df 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,5 +1,23 @@ 2019-06-15 Andrew Burgess + * annotate.c: Add 'source.h' and 'objfiles.h' includes. + (annotate_source): Make static. + (annotate_source_line): Moved from source.c and renamed from + identify_source_line. Update the return type. + * annotate.h (annotate_source): Delete declaration. + (annotate_source_line): Declaration moved from source.h, and + renamed from identify_source_line. Return type updated. + * source.c (identify_source_line): Moved to annotate.c and renamed + to annotate_source_line. + (info_line_command): Remove check of annotation_level. + * source.h (identify_source_line): Move declaration to annotate.h + and rename to annotate_source_line. + * stack.c: Add 'annotate.h' include. + (print_frame_info): Remove check of annotation_level before + calling annotate_source_line. + +2019-06-15 Andrew Burgess + * source-cache.c (source_cache::get_plain_source_lines): Use open_source_file_with_line_charpos instead of just open_source_file, remove call to find_source_lines. diff --git a/gdb/annotate.c b/gdb/annotate.c index 84940ff..84f8129 100644 --- a/gdb/annotate.c +++ b/gdb/annotate.c @@ -26,6 +26,8 @@ #include "inferior.h" #include "infrun.h" #include "top.h" +#include "source.h" +#include "objfiles.h" /* Prototypes for local functions. */ @@ -417,7 +419,7 @@ annotate_arg_end (void) printf_filtered (("\n\032\032arg-end\n")); } -void +static void annotate_source (const char *filename, int line, int character, int mid, struct gdbarch *gdbarch, CORE_ADDR pc) { @@ -430,6 +432,31 @@ annotate_source (const char *filename, int line, int character, int mid, mid ? "middle" : "beg", paddress (gdbarch, pc)); } +/* See annotate.h. */ + +bool +annotate_source_line (struct symtab *s, int line, int mid_statement, + CORE_ADDR pc) +{ + if (annotation_level > 0) + { + if (s->line_charpos == nullptr) + open_source_file_with_line_charpos (s); + if (s->fullname == nullptr) + return false; + /* Don't index off the end of the line_charpos array. */ + if (line > s->nlines) + return false; + + annotate_source (s->fullname, line, s->line_charpos[line - 1], + mid_statement, get_objfile_arch (SYMTAB_OBJFILE (s)), + pc); + return true; + } + return false; +} + + void annotate_frame_begin (int level, struct gdbarch *gdbarch, CORE_ADDR pc) { diff --git a/gdb/annotate.h b/gdb/annotate.h index ff10d45..9683b7e 100644 --- a/gdb/annotate.h +++ b/gdb/annotate.h @@ -87,8 +87,17 @@ struct annotate_arg_emitter DISABLE_COPY_AND_ASSIGN (annotate_arg_emitter); }; -extern void annotate_source (const char *, int, int, int, - struct gdbarch *, CORE_ADDR); +/* If annotations are turned on then print annotation describing the full + name of the source file S and the line number LINE and its corresponding + character position. + + MID_STATEMENT is nonzero if the PC is not at the beginning of that + line. + + Return true if successful, false if the file could not be found or + annotations are turned off. */ +extern bool annotate_source_line (struct symtab *s, int line, + int mid_statement, CORE_ADDR pc); extern void annotate_frame_begin (int, struct gdbarch *, CORE_ADDR); extern void annotate_function_call (void); diff --git a/gdb/source.c b/gdb/source.c index dae1801c..dec5a2f 100644 --- a/gdb/source.c +++ b/gdb/source.c @@ -1212,29 +1212,6 @@ open_source_file_with_line_charpos (struct symtab *s) -/* See source.h. */ - -int -identify_source_line (struct symtab *s, int line, int mid_statement, - CORE_ADDR pc) -{ - if (s->line_charpos == nullptr) - open_source_file_with_line_charpos (s); - if (s->fullname == 0) - return 0; - if (line > s->nlines) - /* Don't index off the end of the line_charpos array. */ - return 0; - annotate_source (s->fullname, line, s->line_charpos[line - 1], - mid_statement, get_objfile_arch (SYMTAB_OBJFILE (s)), pc); - - current_source_line = line; - current_source_symtab = s; - clear_lines_listed_range (); - return 1; -} - - /* Print source lines from the file of symtab S, starting with line number LINE and stopping before line number STOPLINE. */ @@ -1519,8 +1496,8 @@ info_line_command (const char *arg, int from_tty) /* If this is the only line, show the source code. If it could not find the file, don't do anything special. */ - if (annotation_level && sals.size () == 1) - identify_source_line (sal.symtab, sal.line, 0, start_pc); + if (sals.size () == 1) + annotate_source_line (sal.symtab, sal.line, 0, start_pc); } else /* Is there any case in which we get here, and have an address diff --git a/gdb/source.h b/gdb/source.h index 7ea826a..1c45405 100644 --- a/gdb/source.h +++ b/gdb/source.h @@ -127,17 +127,6 @@ extern void clear_current_source_symtab_and_line (void); /* Add a source path substitution rule. */ extern void add_substitute_path_rule (char *, char *); -/* Print text describing the full name of the source file S - and the line number LINE and its corresponding character position. - The text starts with two Ctrl-z so that the Emacs-GDB interface - can easily find it. - - MID_STATEMENT is nonzero if the PC is not at the beginning of that line. - - Return 1 if successful, 0 if could not find the file. */ -extern int identify_source_line (struct symtab *s, int line, - int mid_statement, CORE_ADDR pc); - /* Flags passed as 4th argument to print_source_lines. */ enum print_source_lines_flag { diff --git a/gdb/stack.c b/gdb/stack.c index 547e82b..f471efe 100644 --- a/gdb/stack.c +++ b/gdb/stack.c @@ -47,6 +47,7 @@ #include "linespec.h" #include "cli/cli-utils.h" #include "objfiles.h" +#include "annotate.h" #include "symfile.h" #include "extension.h" @@ -962,13 +963,11 @@ print_frame_info (const frame_print_options &fp_opts, if (source_print && sal.symtab) { - int done = 0; int mid_statement = ((print_what == SRC_LINE) && frame_show_address (frame, sal)); + bool done = annotate_source_line (sal.symtab, sal.line, mid_statement, + get_frame_pc (frame)); - if (annotation_level) - done = identify_source_line (sal.symtab, sal.line, mid_statement, - get_frame_pc (frame)); if (!done) { if (deprecated_print_frame_info_listing_hook) -- 2.7.4