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-rw-r--r--gdb/skip.c602
1 files changed, 602 insertions, 0 deletions
diff --git a/gdb/skip.c b/gdb/skip.c
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+++ b/gdb/skip.c
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+/* Skipping uninteresting files and functions while stepping.
+
+ Copyright (C) 2011 Free Software Foundation, Inc.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+#include "defs.h"
+#include "skip.h"
+#include "value.h"
+#include "valprint.h"
+#include "ui-out.h"
+#include "gdb_string.h"
+#include "symtab.h"
+#include "gdbcmd.h"
+#include "command.h"
+#include "completer.h"
+#include "stack.h"
+#include "cli/cli-utils.h"
+#include "arch-utils.h"
+#include "linespec.h"
+#include "objfiles.h"
+#include "exceptions.h"
+#include "breakpoint.h" /* for get_sal_arch () */
+
+struct skiplist_entry
+{
+ int number;
+
+ /* NULL if this isn't a skiplist entry for an entire file.
+ The skiplist entry owns this pointer. */
+ char *filename;
+
+ /* The name of the marked-for-skip function, if this is a skiplist
+ entry for a function. Note that this might be non-null even if
+ the pc is 0 if the entry is pending a shared library load.
+
+ The skiplist entry owns this pointer. */
+ char *function_name;
+
+ /* 0 if this is a skiplist entry for an entire file, or if this
+ entry will be on a function, pending a shared library load. */
+ CORE_ADDR pc;
+
+ /* Architecture we used to create the skiplist entry. May be null
+ if the entry is pending a shared library load. */
+ struct gdbarch *gdbarch;
+
+ int enabled;
+ int pending;
+
+ struct skiplist_entry *next;
+};
+
+static void skip_function_command (char *arg, int from_tty);
+static void skip_file_command (char *arg, int from_tty);
+static void skip_info (char *arg, int from_tty);
+
+static void add_skiplist_entry (struct skiplist_entry *e);
+static void skip_function_pc (CORE_ADDR pc, char *name,
+ struct gdbarch *arch,
+ int pending);
+
+static struct skiplist_entry *skiplist_entry_chain;
+static int skiplist_entry_count;
+
+#define ALL_SKIPLIST_ENTRIES(E) \
+ for (E = skiplist_entry_chain; E; E = E->next)
+
+#define ALL_SKIPLIST_ENTRIES_SAFE(E,TMP) \
+ for (E = skiplist_entry_chain; \
+ E ? (TMP = E->next, 1) : 0; \
+ E = TMP)
+
+static void
+skip_file_command (char *arg, int from_tty)
+{
+ struct skiplist_entry *e;
+ struct symtab *symtab;
+ int pending = 0;
+ char *filename = 0;
+
+ /* If no argument was given, try to default to the last
+ displayed codepoint. */
+ if (arg == 0)
+ {
+ symtab = get_last_displayed_symtab ();
+ if (symtab == 0)
+ error (_("No default file now."));
+ else
+ filename = symtab->filename;
+ }
+ else
+ {
+ symtab = lookup_symtab (arg);
+ if (symtab == 0)
+ {
+ fprintf_filtered (gdb_stderr, _("No source file named %s.\n"), arg);
+ if (!nquery (_("\
+Ignore file pending future shared library load? ")))
+ return;
+
+ pending = 1;
+ filename = arg;
+ }
+ else
+ filename = symtab->filename;
+ }
+
+ e = XZALLOC (struct skiplist_entry);
+ e->filename = xstrdup (filename);
+ e->enabled = 1;
+ e->pending = pending;
+ if (symtab != 0)
+ e->gdbarch = get_objfile_arch (symtab->objfile);
+
+ add_skiplist_entry (e);
+
+ printf_filtered (_("File %s will be skipped when stepping.\n"), filename);
+}
+
+static void
+skip_function_command (char *arg, int from_tty)
+{
+ CORE_ADDR func_pc;
+ char *name = NULL;
+
+ /* Default to the current function if no argument is given. */
+ if (arg == 0)
+ {
+ CORE_ADDR pc;
+ if (!last_displayed_sal_is_valid ())
+ error (_("No default function now."));
+
+ pc = get_last_displayed_addr ();
+ if (!find_pc_partial_function (pc, &name, &func_pc, 0))
+ {
+ error (_("No function found containing current program point %s."),
+ paddress (get_current_arch (), pc));
+ }
+ skip_function_pc (func_pc, name, get_current_arch (), 0);
+ }
+ else
+ {
+ /* Decode arg. We set funfirstline=1 so decode_line_1 will give us the
+ first line of the function specified, if it can, and so that we'll
+ reject variable names and the like. */
+
+ int i;
+ int pending = 0;
+ char *orig_arg = arg; /* decode_line_1 modifies the arg pointer. */
+ volatile struct gdb_exception decode_exception;
+ struct symtabs_and_lines sals;
+
+ TRY_CATCH (decode_exception, RETURN_MASK_ERROR)
+ {
+ sals = decode_line_1 (&arg, 1, 0, 0, 0);
+ }
+
+ if (decode_exception.reason < 0)
+ {
+ if (decode_exception.error != NOT_FOUND_ERROR)
+ throw_exception (decode_exception);
+
+ fprintf_filtered (gdb_stderr,
+ _("No function found named %s.\n"), orig_arg);
+
+ if (nquery (_("\
+Ignore function pending future shared library load? ")))
+ {
+ /* Add the pending skiplist entry. */
+ skip_function_pc (0, orig_arg, 0, 1);
+ }
+
+ return;
+ }
+
+ if (sals.nelts > 1)
+ error (_("Specify just one function at a time."));
+ if (strlen (arg) != 0)
+ error (_("Junk at end of arguments."));
+
+ /* The pc decode_line_1 gives us is the first line of the function,
+ but we actually want the line before that. The call to
+ find_pc_partial_function gets us the value we actually want. */
+ {
+ struct symtab_and_line sal = sals.sals[0];
+ CORE_ADDR pc = sal.pc;
+ CORE_ADDR func_start = 0;
+ struct gdbarch *arch = get_sal_arch (sal);
+
+ if (!find_pc_partial_function (pc, &name, &func_start, 0))
+ {
+ error (_("No function found containing program point %s."),
+ paddress (arch, pc));
+ }
+
+ skip_function_pc (func_start, name, arch, 0);
+ }
+ }
+}
+
+static void
+skip_info (char *arg, int from_tty)
+{
+ struct skiplist_entry *e;
+ int num_printable_entries = 0;
+ int address_width = 10;
+ struct value_print_options opts;
+ struct cleanup *tbl_chain;
+
+ get_user_print_options (&opts);
+
+ /* Count the number of rows in the table and see if we need space for a
+ 64-bit address anywhere. */
+ ALL_SKIPLIST_ENTRIES (e)
+ if (arg == 0 || number_is_in_list (arg, e->number))
+ {
+ num_printable_entries++;
+ if (e->gdbarch && gdbarch_addr_bit (e->gdbarch) > 32)
+ address_width = 18;
+ }
+
+ if (num_printable_entries == 0)
+ {
+ if (arg == 0)
+ ui_out_message (current_uiout, 0, _("\
+Not skipping any files or functions.\n"));
+ else
+ ui_out_message (current_uiout, 0,
+ _("No skiplist entries found with number %s.\n"), arg);
+
+ return;
+ }
+
+ if (opts.addressprint)
+ tbl_chain = make_cleanup_ui_out_table_begin_end (current_uiout, 5,
+ num_printable_entries,
+ "SkiplistTable");
+ else
+ tbl_chain
+ = make_cleanup_ui_out_table_begin_end (current_uiout, 4,
+ num_printable_entries,
+ "SkiplistTable");
+
+ ui_out_table_header (current_uiout, 7, ui_left, "number", "Num"); /* 1 */
+ ui_out_table_header (current_uiout, 14, ui_left, "type", "Type"); /* 2 */
+ ui_out_table_header (current_uiout, 3, ui_left, "enabled", "Enb"); /* 3 */
+ if (opts.addressprint)
+ {
+ ui_out_table_header (current_uiout, address_width, ui_left,
+ "addr", "Address"); /* 4 */
+ }
+ ui_out_table_header (current_uiout, 40, ui_noalign, "what", "What"); /* 5 */
+ ui_out_table_body (current_uiout);
+
+ ALL_SKIPLIST_ENTRIES (e)
+ {
+ struct cleanup *entry_chain;
+
+ QUIT;
+ if (arg != 0 && !number_is_in_list (arg, e->number))
+ continue;
+
+ entry_chain = make_cleanup_ui_out_tuple_begin_end (current_uiout,
+ "blklst-entry");
+ ui_out_field_int (current_uiout, "number", e->number); /* 1 */
+
+ if (e->function_name != 0)
+ ui_out_field_string (current_uiout, "type", "function"); /* 2 */
+ else if (e->filename != 0)
+ ui_out_field_string (current_uiout, "type", "file"); /* 2 */
+ else
+ internal_error (__FILE__, __LINE__, _("\
+Skiplist entry should have either a filename or a function name."));
+
+ if (e->enabled)
+ ui_out_field_string (current_uiout, "enabled", "y"); /* 3 */
+ else
+ ui_out_field_string (current_uiout, "enabled", "n"); /* 3 */
+
+ if (opts.addressprint)
+ {
+ if (e->pc != 0)
+ ui_out_field_core_addr (current_uiout, "addr",
+ e->gdbarch, e->pc); /* 4 */
+ else
+ ui_out_field_string (current_uiout, "addr", ""); /* 4 */
+ }
+
+ if (!e->pending && e->function_name != 0)
+ {
+ struct symbol *sym;
+
+ gdb_assert (e->pc != 0);
+ sym = find_pc_function (e->pc);
+ if (sym)
+ ui_out_field_fmt (current_uiout, "what", "%s at %s:%d",
+ sym->ginfo.name,
+ sym->symtab->filename,
+ sym->line);
+ else
+ ui_out_field_string (current_uiout, "what", "?");
+ }
+ else if (e->pending && e->function_name != 0)
+ {
+ ui_out_field_fmt (current_uiout, "what", "%s (PENDING)",
+ e->function_name);
+ }
+ else if (!e->pending && e->filename != 0)
+ ui_out_field_string (current_uiout, "what", e->filename);
+ else if (e->pending && e->filename != 0)
+ ui_out_field_fmt (current_uiout, "what", "%s (PENDING)",
+ e->filename);
+
+ ui_out_text (current_uiout, "\n");
+ do_cleanups (entry_chain);
+ }
+
+ do_cleanups (tbl_chain);
+}
+
+static void
+skip_enable_command (char *arg, int from_tty)
+{
+ struct skiplist_entry *e;
+ int found = 0;
+
+ ALL_SKIPLIST_ENTRIES (e)
+ if (arg == 0 || number_is_in_list (arg, e->number))
+ {
+ e->enabled = 1;
+ found = 1;
+ }
+
+ if (!found)
+ error (_("No skiplist entries found with number %s."), arg);
+}
+
+static void
+skip_disable_command (char *arg, int from_tty)
+{
+ struct skiplist_entry *e;
+ int found = 0;
+
+ ALL_SKIPLIST_ENTRIES (e)
+ if (arg == 0 || number_is_in_list (arg, e->number))
+ {
+ e->enabled = 0;
+ found = 1;
+ }
+
+ if (!found)
+ error (_("No skiplist entries found with number %s."), arg);
+}
+
+static void
+skip_delete_command (char *arg, int from_tty)
+{
+ struct skiplist_entry *e, *temp, *b_prev;
+ int found = 0;
+
+ b_prev = 0;
+ ALL_SKIPLIST_ENTRIES_SAFE (e, temp)
+ if (arg == 0 || number_is_in_list (arg, e->number))
+ {
+ if (b_prev != 0)
+ b_prev->next = e->next;
+ else
+ skiplist_entry_chain = e->next;
+
+ xfree (e->function_name);
+ xfree (e->filename);
+ xfree (e);
+ found = 1;
+ }
+ else
+ {
+ b_prev = e;
+ }
+
+ if (!found)
+ error (_("No skiplist entries found with number %s."), arg);
+}
+
+/* Create a skiplist entry for the given pc corresponding to the given
+ function name and add it to the list. */
+
+static void
+skip_function_pc (CORE_ADDR pc, char *name, struct gdbarch *arch,
+ int pending)
+{
+ struct skiplist_entry *e = XZALLOC (struct skiplist_entry);
+
+ e->pc = pc;
+ e->gdbarch = arch;
+ e->enabled = 1;
+ e->pending = pending;
+ e->function_name = xstrdup (name);
+
+ add_skiplist_entry (e);
+
+ if (!pending)
+ printf_filtered (_("Function %s at %s will be skipped when stepping.\n"),
+ name, paddress (get_current_arch (), pc));
+ else
+ printf_filtered (_("Function %s will be skipped when stepping, "
+ "pending shared library load.\n"),
+ name);
+}
+
+/* Add the given skiplist entry to our list, and set the entry's number. */
+
+static void
+add_skiplist_entry (struct skiplist_entry *e)
+{
+ struct skiplist_entry *e1;
+
+ e->number = ++skiplist_entry_count;
+
+ /* Add to the end of the chain so that the list of
+ skiplist entries will be in numerical order. */
+
+ e1 = skiplist_entry_chain;
+ if (e1 == 0)
+ skiplist_entry_chain = e;
+ else
+ {
+ while (e1->next)
+ e1 = e1->next;
+ e1->next = e;
+ }
+}
+
+/* Does the given pc correspond to the beginning of a skipped function? */
+
+int
+function_pc_is_marked_for_skip (CORE_ADDR pc)
+{
+ int searched_for_sal = 0;
+ struct symtab_and_line sal;
+ char *filename = NULL;
+ struct skiplist_entry *e;
+
+ ALL_SKIPLIST_ENTRIES (e)
+ {
+ if (!e->enabled || e->pending)
+ continue;
+
+ /* Does the pc we're stepping into match e's stored pc? */
+ if (e->pc != 0 && pc == e->pc)
+ return 1;
+
+ if (e->filename != 0)
+ {
+ /* Get the filename corresponding to this pc, if we haven't
+ * yet. */
+ if (!searched_for_sal)
+ {
+ sal = find_pc_line (pc, 0);
+ if (sal.symtab != 0)
+ filename = sal.symtab->filename;
+ searched_for_sal = 1;
+ }
+ if (filename != 0 && strcmp (filename, e->filename) == 0)
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
+/* Re-set the skip list after symbols have been re-loaded. */
+void
+skip_re_set (void)
+{
+ struct skiplist_entry *e;
+
+ ALL_SKIPLIST_ENTRIES (e)
+ {
+ if (e->filename != 0)
+ {
+ /* If it's an entry telling us to skip a file, but the entry is
+ currently pending a solib load, let's see if we now know
+ about the file. */
+ struct symtab *symtab = lookup_symtab (e->filename);
+ if (symtab != 0)
+ {
+ xfree (e->filename);
+ e->filename = xstrdup (symtab->filename);
+ e->gdbarch = get_objfile_arch (symtab->objfile);
+ e->pending = 0;
+ }
+ else
+ {
+ e->pending = 1;
+ }
+ }
+ else if (e->function_name != 0)
+ {
+ char *func_name = e->function_name;
+ struct symtabs_and_lines sals;
+ volatile struct gdb_exception decode_exception;
+
+ TRY_CATCH (decode_exception, RETURN_MASK_ERROR)
+ {
+ sals = decode_line_1 (&func_name, 1, 0, 0, 0);
+ }
+
+ if (decode_exception.reason >= 0
+ && sals.nelts == 1 && strlen (func_name) == 0)
+ {
+ struct symtab_and_line sal = sals.sals[0];
+ CORE_ADDR pc = sal.pc;
+ CORE_ADDR func_start = 0;
+ struct gdbarch *arch = get_sal_arch (sal);
+ char *func_name;
+
+ if (find_pc_partial_function (pc, &func_name, &func_start, 0))
+ {
+ e->pending = 0;
+ e->function_name = xstrdup (func_name);
+ e->pc = func_start;
+ e->gdbarch = arch;
+ }
+ }
+ else
+ {
+ e->pending = 1;
+ }
+ }
+ }
+}
+
+void
+_initialize_step_skip (void)
+{
+ struct cmd_list_element *c;
+
+ skiplist_entry_chain = 0;
+ skiplist_entry_count = 0;
+
+ add_prefix_cmd ("skip", class_breakpoint, skip_function_command, _("\
+Ignore a function while stepping.\n\
+Usage: skip [FUNCTION NAME]\n\
+If no function name is given, ignore the current function."),
+ &skiplist, "skip ", 1, &cmdlist);
+
+ c = add_cmd ("file", class_breakpoint, skip_file_command, _("\
+Ignore a file while stepping.\n\
+Usage: skip file [FILENAME]\n\
+If no filename is given, ignore the current file."),
+ &skiplist);
+ set_cmd_completer (c, filename_completer);
+
+ c = add_cmd ("function", class_breakpoint, skip_function_command, _("\
+Ignore a function while stepping.\n\
+Usage: skip function [FUNCTION NAME]\n\
+If no function name is given, skip the current function."),
+ &skiplist);
+ set_cmd_completer (c, location_completer);
+
+ add_cmd ("enable", class_breakpoint, skip_enable_command, _("\
+Enable skip entries. You can specify numbers (e.g. \"skip enable 1 3\"), \
+ranges (e.g. \"skip enable 4-8\"), or both (e.g. \"skip enable 1 3 4-8\").\n\n\
+If you don't specify any numbers or ranges, we'll enable all skip entries.\n\n\
+Usage: skip enable [NUMBERS AND/OR RANGES]"),
+ &skiplist);
+
+ add_cmd ("disable", class_breakpoint, skip_disable_command, _("\
+Disable skip entries. You can specify numbers (e.g. \"skip disable 1 3\"), \
+ranges (e.g. \"skip disable 4-8\"), or both (e.g. \"skip disable 1 3 4-8\").\n\n\
+If you don't specify any numbers or ranges, we'll disable all skip entries.\n\n\
+Usage: skip disable [NUMBERS AND/OR RANGES]"),
+ &skiplist);
+
+ add_cmd ("delete", class_breakpoint, skip_delete_command, _("\
+Delete skip entries. You can specify numbers (e.g. \"skip delete 1 3\"), \
+ranges (e.g. \"skip delete 4-8\"), or both (e.g. \"skip delete 1 3 4-8\").\n\n\
+If you don't specify any numbers or ranges, we'll delete all skip entries.\n\n\
+Usage: skip delete [NUMBERS AND/OR RANGES]"),
+ &skiplist);
+
+ add_info ("skip", skip_info, _("\
+Display the status of skips. You can specify numbers (e.g. \"skip info 1 3\"), \
+ranges (e.g. \"skip info 4-8\"), or both (e.g. \"skip info 1 3 4-8\").\n\n\
+If you don't specify any numbers or ranges, we'll show all skips.\n\n\
+Usage: skip info [NUMBERS AND/OR RANGES]\n\
+The \"Type\" column indicates one of:\n\
+\tfile - ignored file\n\
+\tfunction - ignored function"));
+}