diff options
Diffstat (limited to 'gdb/reverse.c')
| -rw-r--r-- | gdb/reverse.c | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/gdb/reverse.c b/gdb/reverse.c index ee59cf3..d301160 100644 --- a/gdb/reverse.c +++ b/gdb/reverse.c @@ -24,6 +24,7 @@ #include "cli/cli-cmds.h" #include "cli/cli-decode.h" #include "inferior.h" +#include "regcache.h" /* User interface: reverse-step, reverse-next etc. */ @@ -101,6 +102,220 @@ reverse_finish (char *args, int from_tty) exec_reverse_once ("finish", args, from_tty); } +/* Data structures for a bookmark list. */ + +struct bookmark { + struct bookmark *next; + int number; + CORE_ADDR pc; + struct symtab_and_line sal; + gdb_byte *opaque_data; +}; + +static struct bookmark *bookmark_chain; +static int bookmark_count; + +#define ALL_BOOKMARKS(B) for ((B) = bookmark_chain; (B); (B) = (B)->next) + +#define ALL_BOOKMARKS_SAFE(B,TMP) \ + for ((B) = bookmark_chain; \ + (B) ? ((TMP) = (B)->next, 1) : 0; \ + (B) = (TMP)) + +/* save_bookmark_command -- implement "bookmark" command. + Call target method to get a bookmark identifier. + Insert bookmark identifier into list. + + Identifier will be a malloc string (gdb_byte *). + Up to us to free it as required. */ + +static void +save_bookmark_command (char *args, int from_tty) +{ + /* Get target's idea of a bookmark. */ + gdb_byte *bookmark_id = target_get_bookmark (args, from_tty); + struct bookmark *b, *b1; + struct gdbarch *gdbarch = get_regcache_arch (get_current_regcache ()); + + /* CR should not cause another identical bookmark. */ + dont_repeat (); + + if (bookmark_id == NULL) + error (_("target_get_bookmark failed.")); + + /* Set up a bookmark struct. */ + b = xcalloc (1, sizeof (struct bookmark)); + b->number = ++bookmark_count; + init_sal (&b->sal); + b->pc = regcache_read_pc (get_current_regcache ()); + b->sal = find_pc_line (b->pc, 0); + b->sal.pspace = get_frame_program_space (get_current_frame ()); + b->opaque_data = bookmark_id; + b->next = NULL; + + /* Add this bookmark to the end of the chain, so that a list + of bookmarks will come out in order of increasing numbers. */ + + b1 = bookmark_chain; + if (b1 == 0) + bookmark_chain = b; + else + { + while (b1->next) + b1 = b1->next; + b1->next = b; + } + printf_filtered (_("Saved bookmark %d at %s\n"), b->number, + paddress (gdbarch, b->sal.pc)); +} + +/* Implement "delete bookmark" command. */ + +static int +delete_one_bookmark (struct bookmark *b) +{ + struct bookmark *b1; + + /* Special case, first item in list. */ + if (b == bookmark_chain) + bookmark_chain = b->next; + + /* Find bookmark preceeding "marked" one, so we can unlink. */ + if (b) + { + ALL_BOOKMARKS (b1) + if (b1->next == b) + { + /* Found designated bookmark. Unlink and delete. */ + b1->next = b->next; + break; + } + xfree (b->opaque_data); + xfree (b); + return 1; /* success */ + } + return 0; /* failure */ +} + +static void +delete_all_bookmarks (void) +{ + struct bookmark *b, *b1; + + ALL_BOOKMARKS_SAFE (b, b1) + { + xfree (b->opaque_data); + xfree (b); + } + bookmark_chain = NULL; +} + +static void +delete_bookmark_command (char *args, int from_tty) +{ + struct bookmark *b, *b1; + unsigned long num; + + if (bookmark_chain == NULL) + { + warning (_("No bookmarks.")); + return; + } + + if (args == NULL || args[0] == '\0') + { + if (from_tty && !query (_("Delete all bookmarks? "))) + return; + delete_all_bookmarks (); + return; + } + + num = strtoul (args, NULL, 0); + /* Find bookmark with corresponding number. */ + ALL_BOOKMARKS (b) + if (b->number == num) + break; + + if (!delete_one_bookmark (b)) + /* Not found. */ + error (_("delete bookmark: no bookmark found for '%s'."), args); +} + +/* Implement "goto-bookmark" command. */ + +static void +goto_bookmark_command (char *args, int from_tty) +{ + struct bookmark *b; + unsigned long num; + + if (args == NULL || args[0] == '\0') + error (_("Command requires an argument.")); + + if (strncmp (args, "start", strlen ("start")) == 0 + || strncmp (args, "begin", strlen ("begin")) == 0 + || strncmp (args, "end", strlen ("end")) == 0) + { + /* Special case. Give target opportunity to handle. */ + target_goto_bookmark (args, from_tty); + return; + } + + if (args[0] == '\'' || args[0] == '\"') + { + /* Special case -- quoted string. Pass on to target. */ + if (args[strlen (args) - 1] != args[0]) + error (_("Unbalanced quotes: %s"), args); + target_goto_bookmark (args, from_tty); + return; + } + + /* General case. Bookmark identified by bookmark number. */ + num = strtoul (args, NULL, 0); + ALL_BOOKMARKS (b) + if (b->number == num) + break; + + if (b) + { + /* Found. Send to target method. */ + target_goto_bookmark (b->opaque_data, from_tty); + return; + } + /* Not found. */ + error (_("goto-bookmark: no bookmark found for '%s'."), args); +} + +/* Implement "info bookmarks" command. */ + +static void +bookmarks_info (char *args, int from_tty) +{ + struct bookmark *b; + int bnum = -1; + struct gdbarch *gdbarch; + + if (args) + bnum = parse_and_eval_long (args); + + if (!bookmark_chain) + { + printf_filtered (_("No bookmarks.\n")); + return; + } + + gdbarch = get_regcache_arch (get_current_regcache ()); + printf_filtered (_("Bookmark Address Opaque\n")); + printf_filtered (_(" ID Data \n")); + + ALL_BOOKMARKS (b) + printf_filtered (" %d %s '%s'\n", + b->number, + paddress (gdbarch, b->pc), + b->opaque_data); +} + + /* Provide a prototype to silence -Wmissing-prototypes. */ extern initialize_file_ftype _initialize_reverse; @@ -142,4 +357,24 @@ the breakpoint won't break until the Nth time it is reached).")); add_com ("reverse-finish", class_run, reverse_finish, _("\ Execute backward until just before selected stack frame is called.")); + + add_com ("bookmark", class_bookmark, save_bookmark_command, _("\ +Set a bookmark in the program's execution history.\n\ +A bookmark represents a point in the execution history \n\ +that can be returned to at a later point in the debug session.")); + add_info ("bookmarks", bookmarks_info, _("\ +Status of user-settable bookmarks.\n\ +Bookmarks are user-settable markers representing a point in the \n\ +execution history that can be returned to later in the same debug \n\ +session.")); + add_cmd ("bookmark", class_bookmark, delete_bookmark_command, _("\ +Delete a bookmark from the bookmark list.\n\ +Argument is a bookmark number, or no argument to delete all bookmarks.\n"), + &deletelist); + add_com ("goto-bookmark", class_bookmark, goto_bookmark_command, _("\ +Go to an earlier-bookmarked point in the program's execution history.\n\ +Argument is the bookmark number of a bookmark saved earlier by using \n\ +the 'bookmark' command, or the special arguments:\n\ + start (beginning of recording)\n\ + end (end of recording)\n")); } |