From 00df30ae1ea6db8f3693cad8a499f55f1d66e913 Mon Sep 17 00:00:00 2001 From: Andrew Burgess Date: Fri, 14 Jun 2019 22:16:52 +0100 Subject: [PATCH] gdb: New function to open source file and compute line charpos data Every place that a symtab's line_charpos data is loaded always follows the same pattern, so create a new function to contain this logic and make use of it throughout GDB. There should be no user visible changes after this commit. gdb/ChangeLog: * 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. (source_cache::get_source_lines): Likewise. * source.c (find_source_lines): Make static. (get_filename_and_charpos): Renamed into... (open_source_file_with_line_charpos): ..this along with changes to return a scoped_fd, and some other minor clean ups. (identify_source_line): Use open_source_file_with_line_charpos. (search_command_helper): Use open_source_file_with_line_charpos instead of just open_source_file, remove call to find_source_lines. * source.h (open_source_file_with_line_charpos): Declare new function. (find_source_lines): Delete declaration. --- gdb/ChangeLog | 18 ++++++++++++++++++ gdb/source-cache.c | 8 ++------ gdb/source.c | 33 ++++++++++++++++----------------- gdb/source.h | 11 +++++------ 4 files changed, 41 insertions(+), 29 deletions(-) diff --git a/gdb/ChangeLog b/gdb/ChangeLog index 83916ef..cb81983 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,5 +1,23 @@ 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. + (source_cache::get_source_lines): Likewise. + * source.c (find_source_lines): Make static. + (get_filename_and_charpos): Renamed into... + (open_source_file_with_line_charpos): ..this along with changes to + return a scoped_fd, and some other minor clean ups. + (identify_source_line): Use open_source_file_with_line_charpos. + (search_command_helper): Use open_source_file_with_line_charpos + instead of just open_source_file, remove call to + find_source_lines. + * source.h (open_source_file_with_line_charpos): Declare new + function. + (find_source_lines): Delete declaration. + +2019-06-15 Andrew Burgess + * source.c (get_filename_and_charpos): Remove fullname parameter. (identify_source_line): Update call to get_filename_and_charpos. diff --git a/gdb/source-cache.c b/gdb/source-cache.c index d2fb4b8..2d5b549 100644 --- a/gdb/source-cache.c +++ b/gdb/source-cache.c @@ -49,13 +49,10 @@ bool source_cache::get_plain_source_lines (struct symtab *s, int first_line, int last_line, std::string *lines) { - scoped_fd desc (open_source_file (s)); + scoped_fd desc (open_source_file_with_line_charpos (s)); if (desc.get () < 0) return false; - if (s->line_charpos == 0) - find_source_lines (s, desc.get ()); - if (first_line < 1 || first_line > s->nlines || last_line < 1) return false; @@ -202,10 +199,9 @@ source_cache::get_source_lines (struct symtab *s, int first_line, { if (s->line_charpos == 0) { - scoped_fd desc = open_source_file (s); + scoped_fd desc (open_source_file_with_line_charpos (s)); if (desc.get () < 0) return false; - find_source_lines (s, desc.get ()); /* FULLNAME points to a value owned by the symtab (symtab::fullname). Calling open_source_file reallocates diff --git a/gdb/source.c b/gdb/source.c index 5fa55e2..dae1801c 100644 --- a/gdb/source.c +++ b/gdb/source.c @@ -1129,7 +1129,7 @@ symtab_to_filename_for_display (struct symtab *symtab) to be open on descriptor DESC. All set S->nlines to the number of such lines. */ -void +static void find_source_lines (struct symtab *s, int desc) { struct stat st; @@ -1196,28 +1196,30 @@ find_source_lines (struct symtab *s, int desc) -/* Get full pathname and line number positions for a symtab. - Set *FULLNAME to actual name of the file as found by `openp', - or to 0 if the file is not found. */ +/* See source.h. */ -static void -get_filename_and_charpos (struct symtab *s) +scoped_fd +open_source_file_with_line_charpos (struct symtab *s) { - scoped_fd desc = open_source_file (s); - if (desc.get () < 0) - return; - if (s->line_charpos == 0) - find_source_lines (s, desc.get ()); + scoped_fd fd (open_source_file (s)); + if (fd.get () < 0) + return fd; + + if (s->line_charpos == nullptr) + find_source_lines (s, fd.get ()); + return fd; } + + /* See source.h. */ int identify_source_line (struct symtab *s, int line, int mid_statement, CORE_ADDR pc) { - if (s->line_charpos == 0) - get_filename_and_charpos (s); + if (s->line_charpos == nullptr) + open_source_file_with_line_charpos (s); if (s->fullname == 0) return 0; if (line > s->nlines) @@ -1545,13 +1547,10 @@ search_command_helper (const char *regex, int from_tty, bool forward) if (current_source_symtab == 0) select_source_symtab (0); - scoped_fd desc = open_source_file (current_source_symtab); + scoped_fd desc (open_source_file_with_line_charpos (current_source_symtab)); if (desc.get () < 0) perror_with_name (symtab_to_filename_for_display (current_source_symtab)); - if (current_source_symtab->line_charpos == 0) - find_source_lines (current_source_symtab, desc.get ()); - int line = (forward ? last_line_listed + 1 : last_line_listed - 1); diff --git a/gdb/source.h b/gdb/source.h index f1b5f6e..7ea826a 100644 --- a/gdb/source.h +++ b/gdb/source.h @@ -76,6 +76,11 @@ extern scoped_fd find_and_open_source (const char *filename, negative number for error. */ extern scoped_fd open_source_file (struct symtab *s); +/* Open a source file given a symtab S (by calling open_source_file), then + ensure the line_charpos data is initialised for symtab S before + returning. */ +extern scoped_fd open_source_file_with_line_charpos (struct symtab *s); + extern gdb::unique_xmalloc_ptr rewrite_source_path (const char *path); extern const char *symtab_to_fullname (struct symtab *s); @@ -84,12 +89,6 @@ extern const char *symtab_to_fullname (struct symtab *s); filename. It depends on 'set filename-display' value. */ extern const char *symtab_to_filename_for_display (struct symtab *symtab); -/* Create and initialize the table S->line_charpos that records the - positions of the lines in the source file, which is assumed to be - open on descriptor DESC. All set S->nlines to the number of such - lines. */ -extern void find_source_lines (struct symtab *s, int desc); - /* Return the first line listed by print_source_lines. Used by command interpreters to request listing from a previous point. If 0, then no source lines have yet been listed since the last time -- 2.7.4