1 /* Tracing functionality for remote targets in custom GDB protocol
2 Copyright 1997 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
23 #include "tracepoint.h"
25 #include "expression.h"
30 #include "gdb_string.h"
35 /* readline include files */
39 /* readline defines this. */
46 /* maximum length of an agent aexpression.
47 this accounts for the fact that packets are limited to 400 bytes
48 (which includes everything -- including the checksum), and assumes
49 the worst case of maximum length for each of the pieces of a
52 NOTE: expressions get mem2hex'ed otherwise this would be twice as
53 large. (400 - 31)/2 == 184 */
54 #define MAX_AGENT_EXPR_LEN 184
57 extern int info_verbose;
58 extern void (*readline_begin_hook) PARAMS ((char *, ...));
59 extern char * (*readline_hook) PARAMS ((char *));
60 extern void (*readline_end_hook) PARAMS ((void));
61 extern void x_command PARAMS ((char *, int));
62 extern int addressprint; /* Print machine addresses? */
64 /* If this definition isn't overridden by the header files, assume
65 that isatty and fileno exist on this system. */
67 #define ISATTY(FP) (isatty (fileno (FP)))
73 This module defines the following debugger commands:
74 trace : set a tracepoint on a function, line, or address.
75 info trace : list all debugger-defined tracepoints.
76 delete trace : delete one or more tracepoints.
77 enable trace : enable one or more tracepoints.
78 disable trace : disable one or more tracepoints.
79 actions : specify actions to be taken at a tracepoint.
80 passcount : specify a pass count for a tracepoint.
81 tstart : start a trace experiment.
82 tstop : stop a trace experiment.
83 tstatus : query the status of a trace experiment.
84 tfind : find a trace frame in the trace buffer.
85 tdump : print everything collected at the current tracepoint.
86 save-tracepoints : write tracepoint setup into a file.
88 This module defines the following user-visible debugger variables:
89 $trace_frame : sequence number of trace frame currently being debugged.
90 $trace_line : source line of trace frame currently being debugged.
91 $trace_file : source file of trace frame currently being debugged.
92 $tracepoint : tracepoint number of trace frame currently being debugged.
96 /* ======= Important global variables: ======= */
98 /* Chain of all tracepoints defined. */
99 struct tracepoint *tracepoint_chain;
101 /* Number of last tracepoint made. */
102 static int tracepoint_count;
104 /* Number of last traceframe collected. */
105 static int traceframe_number;
107 /* Tracepoint for last traceframe collected. */
108 static int tracepoint_number;
110 /* Symbol for function for last traceframe collected */
111 static struct symbol *traceframe_fun;
113 /* Symtab and line for last traceframe collected */
114 static struct symtab_and_line traceframe_sal;
116 /* Tracing command lists */
117 static struct cmd_list_element *tfindlist;
119 /* ======= Important command functions: ======= */
120 static void trace_command PARAMS ((char *, int));
121 static void tracepoints_info PARAMS ((char *, int));
122 static void delete_trace_command PARAMS ((char *, int));
123 static void enable_trace_command PARAMS ((char *, int));
124 static void disable_trace_command PARAMS ((char *, int));
125 static void trace_pass_command PARAMS ((char *, int));
126 static void trace_actions_command PARAMS ((char *, int));
127 static void trace_start_command PARAMS ((char *, int));
128 static void trace_stop_command PARAMS ((char *, int));
129 static void trace_status_command PARAMS ((char *, int));
130 static void trace_find_command PARAMS ((char *, int));
131 static void trace_find_pc_command PARAMS ((char *, int));
132 static void trace_find_tracepoint_command PARAMS ((char *, int));
133 static void trace_find_line_command PARAMS ((char *, int));
134 static void trace_find_range_command PARAMS ((char *, int));
135 static void trace_find_outside_command PARAMS ((char *, int));
136 static void tracepoint_save_command PARAMS ((char *, int));
137 static void trace_dump_command PARAMS ((char *, int));
139 /* support routines */
140 static void trace_mention PARAMS ((struct tracepoint *));
142 struct collection_list;
143 static void add_aexpr PARAMS ((struct collection_list *, struct agent_expr *));
144 static unsigned char *mem2hex(unsigned char *, unsigned char *, int);
146 /* Utility: returns true if "target remote" */
150 if (current_target.to_shortname &&
151 strcmp (current_target.to_shortname, "remote") == 0)
157 /* Utility: generate error from an incoming stub packet. */
163 return; /* not an error msg */
166 case '1': /* malformed packet error */
167 if (*++buf == '0') /* general case: */
168 error ("tracepoint.c: error in outgoing packet.");
170 error ("tracepoint.c: error in outgoing packet at field #%d.",
171 strtol (buf, NULL, 16));
173 error ("trace API error 0x%s.", ++buf);
175 error ("Target returns error code '%s'.", buf);
179 /* Utility: wait for reply from stub, while accepting "O" packets */
181 remote_get_noisy_reply (buf)
184 do /* loop on reply from remote stub */
186 QUIT; /* allow user to bail out with ^C */
189 error ("Target does not support this command.");
190 else if (buf[0] == 'E')
192 else if (buf[0] == 'O' &&
194 remote_console_output (buf + 1); /* 'O' message from stub */
196 return buf; /* here's the actual reply */
200 /* Set tracepoint count to NUM. */
202 set_tracepoint_count (num)
205 tracepoint_count = num;
206 set_internalvar (lookup_internalvar ("tpnum"),
207 value_from_longest (builtin_type_int, (LONGEST) num));
210 /* Set traceframe number to NUM. */
212 set_traceframe_num (num)
215 traceframe_number = num;
216 set_internalvar (lookup_internalvar ("trace_frame"),
217 value_from_longest (builtin_type_int, (LONGEST) num));
220 /* Set tracepoint number to NUM. */
222 set_tracepoint_num (num)
225 tracepoint_number = num;
226 set_internalvar (lookup_internalvar ("tracepoint"),
227 value_from_longest (builtin_type_int, (LONGEST) num));
230 /* Set externally visible debug variables for querying/printing
231 the traceframe context (line, function, file) */
234 set_traceframe_context (trace_pc)
237 static struct type *func_string, *file_string;
238 static struct type *func_range, *file_range;
239 static value_ptr func_val, file_val;
240 static struct type *charstar;
243 if (charstar == (struct type *) NULL)
244 charstar = lookup_pointer_type (builtin_type_char);
246 if (trace_pc == -1) /* cease debugging any trace buffers */
249 traceframe_sal.pc = traceframe_sal.line = 0;
250 traceframe_sal.symtab = NULL;
251 set_internalvar (lookup_internalvar ("trace_func"),
252 value_from_longest (charstar, (LONGEST) 0));
253 set_internalvar (lookup_internalvar ("trace_file"),
254 value_from_longest (charstar, (LONGEST) 0));
255 set_internalvar (lookup_internalvar ("trace_line"),
256 value_from_longest (builtin_type_int, (LONGEST) -1));
260 /* save as globals for internal use */
261 traceframe_sal = find_pc_line (trace_pc, 0);
262 traceframe_fun = find_pc_function (trace_pc);
264 /* save linenumber as "$trace_line", a debugger variable visible to users */
265 set_internalvar (lookup_internalvar ("trace_line"),
266 value_from_longest (builtin_type_int,
267 (LONGEST) traceframe_sal.line));
269 /* save func name as "$trace_func", a debugger variable visible to users */
270 if (traceframe_fun == NULL ||
271 SYMBOL_NAME (traceframe_fun) == NULL)
272 set_internalvar (lookup_internalvar ("trace_func"),
273 value_from_longest (charstar, (LONGEST) 0));
276 len = strlen (SYMBOL_NAME (traceframe_fun));
277 func_range = create_range_type (func_range,
278 builtin_type_int, 0, len - 1);
279 func_string = create_array_type (func_string,
280 builtin_type_char, func_range);
281 func_val = allocate_value (func_string);
282 VALUE_TYPE (func_val) = func_string;
283 memcpy (VALUE_CONTENTS_RAW (func_val),
284 SYMBOL_NAME (traceframe_fun),
286 func_val->modifiable = 0;
287 set_internalvar (lookup_internalvar ("trace_func"), func_val);
290 /* save file name as "$trace_file", a debugger variable visible to users */
291 if (traceframe_sal.symtab == NULL ||
292 traceframe_sal.symtab->filename == NULL)
293 set_internalvar (lookup_internalvar ("trace_file"),
294 value_from_longest (charstar, (LONGEST) 0));
297 len = strlen (traceframe_sal.symtab->filename);
298 file_range = create_range_type (file_range,
299 builtin_type_int, 0, len - 1);
300 file_string = create_array_type (file_string,
301 builtin_type_char, file_range);
302 file_val = allocate_value (file_string);
303 VALUE_TYPE (file_val) = file_string;
304 memcpy (VALUE_CONTENTS_RAW (file_val),
305 traceframe_sal.symtab->filename,
307 file_val->modifiable = 0;
308 set_internalvar (lookup_internalvar ("trace_file"), file_val);
312 /* Low level routine to set a tracepoint.
313 Returns the tracepoint object so caller can set other things.
314 Does not set the tracepoint number!
315 Does not print anything.
317 ==> This routine should not be called if there is a chance of later
318 error(); otherwise it leaves a bogus tracepoint on the chain. Validate
319 your arguments BEFORE calling this routine! */
321 static struct tracepoint *
322 set_raw_tracepoint (sal)
323 struct symtab_and_line sal;
325 register struct tracepoint *t, *tc;
326 struct cleanup *old_chain;
328 t = (struct tracepoint *) xmalloc (sizeof (struct tracepoint));
329 old_chain = make_cleanup (free, t);
330 memset (t, 0, sizeof (*t));
332 if (sal.symtab == NULL)
333 t->source_file = NULL;
336 if (sal.symtab->dirname == NULL)
338 t->source_file = (char *) xmalloc (strlen (sal.symtab->filename) + 1);
339 strcpy (t->source_file, sal.symtab->filename);
345 t->source_file = (char *) xmalloc (strlen (sal.symtab->filename) +
346 strlen (sal.symtab->dirname) + 2);
348 strcpy (t->source_file, sal.symtab->dirname);
352 if (*(--p) != '/') /* Will this work on Windows? */
353 strcat (t->source_file, "/");
354 strcat (t->source_file, sal.symtab->filename);
358 t->language = current_language->la_language;
359 t->input_radix = input_radix;
360 t->line_number = sal.line;
361 t->enabled = enabled;
365 t->addr_string = NULL;
367 /* Add this tracepoint to the end of the chain
368 so that a list of tracepoints will come out in order
369 of increasing numbers. */
371 tc = tracepoint_chain;
373 tracepoint_chain = t;
380 discard_cleanups (old_chain);
384 /* Set a tracepoint according to ARG (function, linenum or *address) */
386 trace_command (arg, from_tty)
390 char **canonical = (char **)NULL;
391 struct symtabs_and_lines sals;
392 struct symtab_and_line sal;
393 struct tracepoint *t;
394 char *addr_start = 0, *addr_end = 0;
398 error ("trace command requires an argument");
400 if (from_tty && info_verbose)
401 printf_filtered ("TRACE %s\n", arg);
404 sals = decode_line_1 (&arg, 1, (struct symtab *)NULL, 0, &canonical);
407 return; /* ??? Presumably decode_line_1 has already warned? */
409 /* Resolve all line numbers to PC's */
410 for (i = 0; i < sals.nelts; i++)
411 resolve_sal_pc (&sals.sals[i]);
413 /* Now set all the tracepoints. */
414 for (i = 0; i < sals.nelts; i++)
418 t = set_raw_tracepoint (sal);
419 set_tracepoint_count (tracepoint_count + 1);
420 t->number = tracepoint_count;
422 /* If a canonical line spec is needed use that instead of the
424 if (canonical != (char **)NULL && canonical[i] != NULL)
425 t->addr_string = canonical[i];
427 t->addr_string = savestring (addr_start, addr_end - addr_start);
431 /* Let the UI know of any additions */
432 if (create_tracepoint_hook)
433 create_tracepoint_hook (t);
438 printf_filtered ("Multiple tracepoints were set.\n");
439 printf_filtered ("Use 'delete trace' to delete unwanted tracepoints.\n");
443 /* Tell the user we have just set a tracepoint TP. */
447 struct tracepoint *tp;
449 printf_filtered ("Tracepoint %d", tp->number);
451 if (addressprint || (tp->source_file == NULL))
453 printf_filtered (" at ");
454 print_address_numeric (tp->address, 1, gdb_stdout);
457 printf_filtered (": file %s, line %d.",
458 tp->source_file, tp->line_number);
460 printf_filtered ("\n");
463 /* Print information on tracepoint number TPNUM_EXP, or all if omitted. */
466 tracepoints_info (tpnum_exp, from_tty)
470 struct tracepoint *t;
471 struct action_line *action;
472 int found_a_tracepoint = 0;
473 char wrap_indent[80];
478 tpnum = parse_and_eval_address (tpnum_exp);
481 if (tpnum == -1 || tpnum == t->number)
483 extern int addressprint; /* print machine addresses? */
485 if (!found_a_tracepoint++)
487 printf_filtered ("Num Enb ");
489 printf_filtered ("Address ");
490 printf_filtered ("PassC StepC What\n");
492 strcpy (wrap_indent, " ");
494 strcat (wrap_indent, " ");
496 printf_filtered ("%-3d %-3s ", t->number,
497 t->enabled == enabled ? "y" : "n");
499 printf_filtered ("%s ",
500 local_hex_string_custom ((unsigned long) t->address,
502 printf_filtered ("%-5d %-5d ", t->pass_count, t->step_count);
506 sym = find_pc_function (t->address);
509 fputs_filtered ("in ", gdb_stdout);
510 fputs_filtered (SYMBOL_SOURCE_NAME (sym), gdb_stdout);
511 wrap_here (wrap_indent);
512 fputs_filtered (" at ", gdb_stdout);
514 fputs_filtered (t->source_file, gdb_stdout);
515 printf_filtered (":%d", t->line_number);
518 print_address_symbolic (t->address, gdb_stdout, demangle, " ");
520 printf_filtered ("\n");
523 printf_filtered (" Actions for tracepoint %d: \n", t->number);
524 for (action = t->actions; action; action = action->next)
526 printf_filtered ("\t%s\n", action->action);
530 if (!found_a_tracepoint)
533 printf_filtered ("No tracepoints.\n");
535 printf_filtered ("No tracepoint number %d.\n", tpnum);
539 /* Optimization: the code to parse an enable, disable, or delete TP command
540 is virtually identical except for whether it performs an enable, disable,
541 or delete. Therefore I've combined them into one function with an opcode.
543 enum tracepoint_opcode
550 /* This function implements enable, disable and delete. */
552 tracepoint_operation (t, from_tty, opcode)
553 struct tracepoint *t;
555 enum tracepoint_opcode opcode;
557 struct tracepoint *t2;
561 t->enabled = enabled;
562 if (modify_tracepoint_hook)
563 modify_tracepoint_hook (t);
566 t->enabled = disabled;
567 if (modify_tracepoint_hook)
568 modify_tracepoint_hook (t);
571 if (tracepoint_chain == t)
572 tracepoint_chain = t->next;
581 /* Let the UI know of any deletions */
582 if (delete_tracepoint_hook)
583 delete_tracepoint_hook (t);
586 free (t->addr_string);
588 free (t->source_file);
597 /* Utility: parse a tracepoint number and look it up in the list. */
599 get_tracepoint_by_number (arg)
602 struct tracepoint *t;
608 error ("Bad tracepoint argument");
610 if (*arg == 0 || **arg == 0) /* empty arg means refer to last tp */
611 tpnum = tracepoint_count;
612 else if (**arg == '$') /* handle convenience variable */
614 /* Make a copy of the name, so we can null-terminate it
615 to pass to lookup_internalvar(). */
617 while (isalnum(*end) || *end == '_')
619 copy = (char *) alloca (end - *arg);
620 strncpy (copy, *arg + 1, (end - *arg - 1));
621 copy[end - *arg - 1] = '\0';
624 val = value_of_internalvar (lookup_internalvar (copy));
625 if (TYPE_CODE( VALUE_TYPE (val)) != TYPE_CODE_INT)
626 error ("Convenience variable must have integral type.");
627 tpnum = (int) value_as_long (val);
629 else /* handle tracepoint number */
631 tpnum = strtol (*arg, arg, 0);
632 if (tpnum == 0) /* possible strtol failure */
633 while (**arg && !isspace (**arg))
634 (*arg)++; /* advance to next white space, if any */
637 if (t->number == tpnum)
641 printf_unfiltered ("No tracepoint number %d.\n", tpnum);
645 /* Utility: parse a list of tracepoint numbers, and call a func for each. */
647 map_args_over_tracepoints (args, from_tty, opcode)
650 enum tracepoint_opcode opcode;
652 struct tracepoint *t, *tmp;
656 if (args == 0 || *args == 0) /* do them all */
657 ALL_TRACEPOINTS_SAFE (t, tmp)
658 tracepoint_operation (t, from_tty, opcode);
662 QUIT; /* give user option to bail out with ^C */
663 if (t = get_tracepoint_by_number (&args))
664 tracepoint_operation (t, from_tty, opcode);
665 while (*args == ' ' || *args == '\t')
670 /* The 'enable trace' command enables tracepoints. Not supported by all targets. */
672 enable_trace_command (args, from_tty)
677 map_args_over_tracepoints (args, from_tty, enable);
680 /* The 'disable trace' command enables tracepoints. Not supported by all targets. */
682 disable_trace_command (args, from_tty)
687 map_args_over_tracepoints (args, from_tty, disable);
690 /* Remove a tracepoint (or all if no argument) */
692 delete_trace_command (args, from_tty)
697 if (!args || !*args) /* No args implies all tracepoints; */
698 if (from_tty) /* confirm only if from_tty... */
699 if (tracepoint_chain) /* and if there are tracepoints to delete! */
700 if (!query ("Delete all tracepoints? "))
703 map_args_over_tracepoints (args, from_tty, delete);
706 /* Set passcount for tracepoint.
708 First command argument is passcount, second is tracepoint number.
709 If tracepoint number omitted, apply to most recently defined.
710 Also accepts special argument "all". */
713 trace_pass_command (args, from_tty)
717 struct tracepoint *t1 = (struct tracepoint *) -1, *t2;
720 if (args == 0 || *args == 0)
721 error ("PASS command requires an argument (count + optional TP num)");
723 count = strtoul (args, &args, 10); /* count comes first, then TP num */
725 while (*args && isspace (*args))
728 if (*args && strncasecmp (args, "all", 3) == 0)
729 args += 3; /* skip special argument "all" */
731 t1 = get_tracepoint_by_number (&args);
734 error ("Junk at end of arguments.");
737 return; /* error, bad tracepoint number */
740 if (t1 == (struct tracepoint *) -1 || t1 == t2)
742 t2->pass_count = count;
743 if (modify_tracepoint_hook)
744 modify_tracepoint_hook (t2);
746 printf_filtered ("Setting tracepoint %d's passcount to %d\n",
751 /* ACTIONS functions: */
753 /* Prototypes for action-parsing utility commands */
754 static void read_actions PARAMS((struct tracepoint *));
755 static char *parse_and_eval_memrange PARAMS ((char *,
761 /* The three functions:
762 collect_pseudocommand,
763 while_stepping_pseudocommand, and
764 end_actions_pseudocommand
765 are placeholders for "commands" that are actually ONLY to be used
766 within a tracepoint action list. If the actual function is ever called,
767 it means that somebody issued the "command" at the top level,
768 which is always an error. */
771 end_actions_pseudocommand (args, from_tty)
775 error ("This command cannot be used at the top level.");
779 while_stepping_pseudocommand (args, from_tty)
783 error ("This command can only be used in a tracepoint actions list.");
787 collect_pseudocommand (args, from_tty)
791 error ("This command can only be used in a tracepoint actions list.");
794 /* Enter a list of actions for a tracepoint. */
796 trace_actions_command (args, from_tty)
800 struct tracepoint *t;
803 char *end_msg = "End with a line saying just \"end\".";
805 if (t = get_tracepoint_by_number (&args))
807 sprintf (tmpbuf, "Enter actions for tracepoint %d, one per line.",
812 if (readline_begin_hook)
813 (*readline_begin_hook) ("%s %s\n", tmpbuf, end_msg);
814 else if (input_from_terminal_p ())
815 printf_filtered ("%s\n%s\n", tmpbuf, end_msg);
819 t->step_count = 0; /* read_actions may set this */
822 if (readline_end_hook)
823 (*readline_end_hook) ();
825 /* tracepoints_changed () */
827 /* else error, just return; */
830 /* worker function */
833 struct tracepoint *t;
836 char *prompt1 = "> ", *prompt2 = " > ";
837 char *prompt = prompt1;
838 enum actionline_type linetype;
839 extern FILE *instream;
840 struct action_line *next = NULL, *temp;
841 struct cleanup *old_chain;
843 /* Control-C quits instantly if typed while in this loop
844 since it should not wait until the user types a newline. */
848 signal (STOP_SIGNAL, stop_sig);
850 old_chain = make_cleanup (free_actions, (void *) t);
853 /* Make sure that all output has been output. Some machines may let
854 you get away with leaving out some of the gdb_flush, but not all. */
856 gdb_flush (gdb_stdout);
857 gdb_flush (gdb_stderr);
859 if (readline_hook && instream == NULL)
860 line = (*readline_hook) (prompt);
861 else if (instream == stdin && ISATTY (instream))
863 line = readline (prompt);
864 if (line && *line) /* add it to command history */
868 line = gdb_readline (0);
870 linetype = validate_actionline (&line, t);
871 if (linetype == BADLINE)
872 continue; /* already warned -- collect another line */
874 temp = xmalloc (sizeof (struct action_line));
878 if (next == NULL) /* first action for this tracepoint? */
879 t->actions = next = temp;
886 if (linetype == STEPPING) /* begin "while-stepping" */
887 if (prompt == prompt2)
889 warning ("Already processing 'while-stepping'");
893 prompt = prompt2; /* change prompt for stepping actions */
894 else if (linetype == END)
895 if (prompt == prompt2)
897 prompt = prompt1; /* end of single-stepping actions */
900 { /* end of actions */
901 if (t->actions->next == NULL)
903 /* an "end" all by itself with no other actions means
904 this tracepoint has no actions. Discard empty list. */
912 signal (STOP_SIGNAL, SIG_DFL);
915 discard_cleanups (old_chain);
918 /* worker function */
920 validate_actionline (line, t)
922 struct tracepoint *t;
924 struct cmd_list_element *c;
925 struct expression *exp = NULL;
926 value_ptr temp, temp2;
927 struct cleanup *old_chain = NULL;
930 for (p = *line; isspace (*p); )
933 /* symbol lookup etc. */
934 if (*p == '\0') /* empty line: just prompt for another line. */
937 if (*p == '#') /* comment line */
940 c = lookup_cmd (&p, cmdlist, "", -1, 1);
943 warning ("'%s' is not an action that I know, or is ambiguous.", p);
947 if (c->function.cfunc == collect_pseudocommand)
949 struct agent_expr *aexpr;
950 struct agent_reqs areqs;
952 do { /* repeat over a comma-separated list */
953 QUIT; /* allow user to bail out with ^C */
957 if (*p == '$') /* look for special pseudo-symbols */
960 bfd_signed_vma offset;
962 if ((0 == strncasecmp ("reg", p + 1, 3)) ||
963 (0 == strncasecmp ("arg", p + 1, 3)) ||
964 (0 == strncasecmp ("loc", p + 1, 3)))
969 /* else fall thru, treat p as an expression and parse it! */
971 exp = parse_exp_1 (&p, block_for_pc (t->address), 1);
972 old_chain = make_cleanup (free_current_contents, &exp);
974 if (exp->elts[0].opcode == OP_VAR_VALUE)
975 if (SYMBOL_CLASS (exp->elts[2].symbol) == LOC_CONST)
977 warning ("%s is constant (value %d): will not be collected.",
978 SYMBOL_NAME (exp->elts[2].symbol),
979 SYMBOL_VALUE (exp->elts[2].symbol));
982 else if (SYMBOL_CLASS (exp->elts[2].symbol) == LOC_OPTIMIZED_OUT)
984 warning ("%s is optimized away and cannot be collected.",
985 SYMBOL_NAME (exp->elts[2].symbol));
989 /* we have something to collect, make sure that the expr to
990 bytecode translator can handle it and that it's not too long */
991 aexpr = gen_trace_for_expr(exp);
992 (void) make_cleanup (free_agent_expr, aexpr);
994 if (aexpr->len > MAX_AGENT_EXPR_LEN)
995 error ("expression too complicated, try simplifying");
997 ax_reqs(aexpr, &areqs);
998 (void) make_cleanup (free, areqs.reg_mask);
1000 if (areqs.flaw != agent_flaw_none)
1001 error ("malformed expression");
1003 if (areqs.min_height < 0)
1004 error ("gdb: Internal error: expression has min height < 0");
1006 if (areqs.max_height > 20)
1007 error ("expression too complicated, try simplifying");
1009 do_cleanups (old_chain);
1010 } while (p && *p++ == ',');
1013 else if (c->function.cfunc == while_stepping_pseudocommand)
1015 char *steparg; /* in case warning is necessary */
1017 while (isspace (*p))
1022 (t->step_count = strtol (p, &p, 0)) == 0)
1024 warning ("bad step-count: command ignored.", *line);
1029 else if (c->function.cfunc == end_actions_pseudocommand)
1033 warning ("'%s' is not a supported tracepoint action.", *line);
1038 /* worker function */
1041 struct tracepoint *t;
1043 struct action_line *line, *next;
1045 for (line = t->actions; line; line = next)
1049 free (line->action);
1056 int type; /* 0 for absolute memory range, else basereg number */
1057 bfd_signed_vma start;
1061 struct collection_list {
1062 unsigned char regs_mask[8]; /* room for up to 256 regs */
1065 struct memrange *list;
1066 long aexpr_listsize; /* size of array pointed to by expr_list elt */
1067 long next_aexpr_elt;
1068 struct agent_expr **aexpr_list;
1070 } tracepoint_list, stepping_list;
1072 /* MEMRANGE functions: */
1074 static int memrange_cmp PARAMS ((const void *, const void *));
1076 /* compare memranges for qsort */
1078 memrange_cmp (va, vb)
1082 const struct memrange *a = va, *b = vb;
1084 if (a->type < b->type)
1086 if (a->type > b->type)
1090 if ((bfd_vma) a->start < (bfd_vma) b->start) return -1;
1091 if ((bfd_vma) a->start > (bfd_vma) b->start) return 1;
1095 if (a->start < b->start)
1097 if (a->start > b->start)
1103 /* Sort the memrange list using qsort, and merge adjacent memranges */
1105 memrange_sortmerge (memranges)
1106 struct collection_list *memranges;
1110 qsort (memranges->list, memranges->next_memrange,
1111 sizeof (struct memrange), memrange_cmp);
1112 if (memranges->next_memrange > 0)
1114 for (a = 0, b = 1; b < memranges->next_memrange; b++)
1116 if (memranges->list[a].type == memranges->list[b].type &&
1117 memranges->list[b].start - memranges->list[a].end <=
1118 MAX_REGISTER_VIRTUAL_SIZE)
1120 /* memrange b starts before memrange a ends; merge them. */
1121 if (memranges->list[b].end > memranges->list[a].end)
1122 memranges->list[a].end = memranges->list[b].end;
1123 continue; /* next b, same a */
1127 memcpy (&memranges->list[a], &memranges->list[b],
1128 sizeof (struct memrange));
1130 memranges->next_memrange = a + 1;
1134 /* Add a register to a collection list */
1136 add_register (collection, regno)
1137 struct collection_list *collection;
1138 unsigned long regno;
1141 printf_filtered ("collect register %d\n", regno);
1142 if (regno > (8 * sizeof (collection->regs_mask)))
1143 error ("Internal: register number %d too large for tracepoint",
1145 collection->regs_mask [regno / 8] |= 1 << (regno % 8);
1148 /* Add a memrange to a collection list */
1150 add_memrange (memranges, type, base, len)
1151 struct collection_list *memranges;
1153 bfd_signed_vma base;
1157 printf_filtered ("(%d,0x%x,%d)\n", type, base, len);
1158 /* type: 0 == memory, n == basereg */
1159 memranges->list[memranges->next_memrange].type = type;
1160 /* base: addr if memory, offset if reg relative. */
1161 memranges->list[memranges->next_memrange].start = base;
1162 /* len: we actually save end (base + len) for convenience */
1163 memranges->list[memranges->next_memrange].end = base + len;
1164 memranges->next_memrange++;
1165 if (memranges->next_memrange >= memranges->listsize)
1167 memranges->listsize *= 2;
1168 memranges->list = xrealloc (memranges->list,
1169 memranges->listsize);
1172 if (type != -1) /* better collect the base register! */
1173 add_register (memranges, type);
1176 /* Add a symbol to a collection list */
1178 collect_symbol (collect, sym)
1179 struct collection_list *collect;
1184 bfd_signed_vma offset;
1186 len = TYPE_LENGTH (check_typedef (SYMBOL_TYPE (sym)));
1187 switch (SYMBOL_CLASS (sym)) {
1189 printf_filtered ("%s: don't know symbol class %d\n",
1190 SYMBOL_NAME (sym), SYMBOL_CLASS (sym));
1193 printf_filtered ("%s is constant, value is %d: will not be collected.\n",
1194 SYMBOL_NAME (sym), SYMBOL_VALUE (sym));
1197 offset = SYMBOL_VALUE_ADDRESS (sym);
1199 printf_filtered ("LOC_STATIC %s: collect %d bytes at 0x%08x\n",
1200 SYMBOL_NAME (sym), len, offset);
1201 add_memrange (collect, -1, offset, len); /* 0 == memory */
1205 reg = SYMBOL_VALUE (sym);
1207 printf_filtered ("LOC_REG[parm] %s: ", SYMBOL_NAME (sym));
1208 add_register (collect, reg);
1209 /* check for doubles stored in two registers */
1210 /* FIXME: how about larger types stored in 3 or more regs? */
1211 if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_FLT &&
1212 len > REGISTER_RAW_SIZE (reg))
1213 add_register (collect, reg + 1);
1216 printf_filtered ("Sorry, don't know how to do LOC_REF_ARG yet.\n");
1217 printf_filtered (" (will not collect %s)\n",
1221 offset = SYMBOL_VALUE (sym);
1225 printf_filtered ("LOC_LOCAL %s: Collect %d bytes at offset",
1226 SYMBOL_NAME (sym), len);
1227 printf_filtered (" %d from frame ptr reg %d\n", offset, reg);
1229 add_memrange (collect, reg, offset, len);
1231 case LOC_REGPARM_ADDR:
1232 reg = SYMBOL_VALUE (sym);
1236 printf_filtered ("LOC_REGPARM_ADDR %s: Collect %d bytes at offset",
1237 SYMBOL_NAME (sym), len);
1238 printf_filtered (" %d from reg %d\n", offset, reg);
1240 add_memrange (collect, reg, offset, len);
1244 offset = SYMBOL_VALUE (sym);
1248 printf_filtered ("LOC_LOCAL %s: Collect %d bytes at offset",
1249 SYMBOL_NAME (sym), len);
1250 printf_filtered (" %d from frame ptr reg %d\n", offset, reg);
1252 add_memrange (collect, reg, offset, len);
1255 case LOC_BASEREG_ARG:
1256 reg = SYMBOL_BASEREG (sym);
1257 offset = SYMBOL_VALUE (sym);
1260 printf_filtered ("LOC_BASEREG %s: collect %d bytes at offset %d from basereg %d\n",
1261 SYMBOL_NAME (sym), len, offset, reg);
1263 add_memrange (collect, reg, offset, len);
1265 case LOC_UNRESOLVED:
1266 printf_filtered ("Don't know LOC_UNRESOLVED %s\n", SYMBOL_NAME (sym));
1268 case LOC_OPTIMIZED_OUT:
1269 printf_filtered ("%s has been optimized out of existance.\n",
1275 /* Add all locals (or args) symbols to collection list */
1277 add_local_symbols (collect, pc, type)
1278 struct collection_list *collect;
1283 struct block *block;
1284 int i, nsyms, count = 0;
1286 block = block_for_pc (pc);
1289 QUIT; /* allow user to bail out with ^C */
1290 nsyms = BLOCK_NSYMS (block);
1291 for (i = 0; i < nsyms; i++)
1293 sym = BLOCK_SYM (block, i);
1294 switch (SYMBOL_CLASS (sym)) {
1299 if (type == 'L') /* collecting Locals */
1302 collect_symbol (collect, sym);
1309 case LOC_REGPARM_ADDR:
1310 case LOC_BASEREG_ARG:
1311 if (type == 'A') /* collecting Arguments */
1314 collect_symbol (collect, sym);
1318 if (BLOCK_FUNCTION (block))
1321 block = BLOCK_SUPERBLOCK (block);
1324 warning ("No %s found in scope.", type == 'L' ? "locals" : "args");
1327 /* worker function */
1329 clear_collection_list (list)
1330 struct collection_list *list;
1334 list->next_memrange = 0;
1335 for (ndx = 0; ndx < list->next_aexpr_elt; ndx++)
1337 free_agent_expr(list->aexpr_list[ndx]);
1338 list->aexpr_list[ndx] = NULL;
1340 list->next_aexpr_elt = 0;
1341 memset (list->regs_mask, 0, sizeof (list->regs_mask));
1344 /* reduce a collection list to string form (for gdb protocol) */
1346 stringify_collection_list (list, string)
1347 struct collection_list *list;
1350 char temp_buf[2048];
1353 char *(*str_list)[];
1357 count = 1 + list->next_memrange + list->next_aexpr_elt + 1;
1358 str_list = (char *(*)[])xmalloc(count * sizeof (char *));
1360 for (i = sizeof (list->regs_mask) - 1; i > 0; i--)
1361 if (list->regs_mask[i] != 0) /* skip leading zeroes in regs_mask */
1363 if (list->regs_mask[i] != 0) /* prepare to send regs_mask to the stub */
1366 printf_filtered ("\nCollecting registers (mask): 0x");
1371 QUIT; /* allow user to bail out with ^C */
1373 printf_filtered ("%02X", list->regs_mask[i]);
1374 sprintf (end, "%02X", list->regs_mask[i]);
1377 (*str_list)[ndx] = savestring(temp_buf, end - temp_buf);
1381 printf_filtered ("\n");
1382 if (list->next_memrange > 0 && info_verbose)
1383 printf_filtered ("Collecting memranges: \n");
1384 for (i = 0, count = 0, end = temp_buf; i < list->next_memrange; i++)
1386 QUIT; /* allow user to bail out with ^C */
1388 printf_filtered ("(%d, 0x%x, %d)\n",
1390 list->list[i].start,
1391 list->list[i].end - list->list[i].start);
1392 if (count + 27 > MAX_AGENT_EXPR_LEN)
1394 (*str_list)[ndx] = savestring(temp_buf, count);
1399 sprintf (end, "M%X,%X,%X",
1401 list->list[i].start,
1402 list->list[i].end - list->list[i].start);
1403 count += strlen (end);
1404 end += strlen (end);
1407 for (i = 0; i < list->next_aexpr_elt; i++)
1409 QUIT; /* allow user to bail out with ^C */
1410 if ((count + 10 + 2 * list->aexpr_list[i]->len) > MAX_AGENT_EXPR_LEN)
1412 (*str_list)[ndx] = savestring(temp_buf, count);
1417 sprintf (end, "X%08X,", list->aexpr_list[i]->len);
1418 end += 10; /* 'X' + 8 hex digits + ',' */
1421 end = mem2hex(list->aexpr_list[i]->buf, end, list->aexpr_list[i]->len);
1422 count += 2 * list->aexpr_list[i]->len;
1427 (*str_list)[ndx] = savestring(temp_buf, count);
1432 (*str_list)[ndx] = NULL;
1441 free_actions_list(actions_list)
1442 char **actions_list;
1446 if (actions_list == 0)
1449 for (ndx = 0; actions_list[ndx]; ndx++)
1450 free(actions_list[ndx]);
1455 /* render all actions into gdb protocol */
1457 encode_actions (t, tdp_actions, stepping_actions)
1458 struct tracepoint *t;
1459 char ***tdp_actions;
1460 char ***stepping_actions;
1462 static char tdp_buff[2048], step_buff[2048];
1464 struct expression *exp = NULL;
1465 struct action_line *action;
1466 bfd_signed_vma offset;
1469 struct collection_list *collect;
1470 struct cmd_list_element *cmd;
1471 struct agent_expr *aexpr;
1473 clear_collection_list (&tracepoint_list);
1474 clear_collection_list (&stepping_list);
1475 collect = &tracepoint_list;
1477 *tdp_actions = NULL;
1478 *stepping_actions = NULL;
1480 for (action = t->actions; action; action = action->next)
1482 QUIT; /* allow user to bail out with ^C */
1483 action_exp = action->action;
1484 while (isspace (*action_exp))
1487 if (*action_exp == '#') /* comment line */
1490 cmd = lookup_cmd (&action_exp, cmdlist, "", -1, 1);
1492 error ("Bad action list item: %s", action_exp);
1494 if (cmd->function.cfunc == collect_pseudocommand)
1496 do { /* repeat over a comma-separated list */
1497 QUIT; /* allow user to bail out with ^C */
1498 while (isspace (*action_exp))
1501 if (0 == strncasecmp ("$reg", action_exp, 4))
1503 for (i = 0; i < NUM_REGS; i++)
1504 add_register (collect, i);
1505 action_exp = strchr (action_exp, ','); /* more? */
1507 else if (0 == strncasecmp ("$arg", action_exp, 4))
1509 add_local_symbols (collect, t->address, 'A');
1510 action_exp = strchr (action_exp, ','); /* more? */
1512 else if (0 == strncasecmp ("$loc", action_exp, 4))
1514 add_local_symbols (collect, t->address, 'L');
1515 action_exp = strchr (action_exp, ','); /* more? */
1519 unsigned long addr, len;
1520 struct cleanup *old_chain = NULL;
1521 struct cleanup *old_chain1 = NULL;
1522 struct agent_reqs areqs;
1524 exp = parse_exp_1 (&action_exp, block_for_pc (t->address), 1);
1525 old_chain = make_cleanup (free_current_contents, &exp);
1527 switch (exp->elts[0].opcode) {
1529 i = exp->elts[1].longconst;
1531 printf_filtered ("OP_REGISTER: ");
1532 add_register (collect, i);
1536 /* safe because we know it's a simple expression */
1537 tempval = evaluate_expression (exp);
1538 addr = VALUE_ADDRESS (tempval) + VALUE_OFFSET (tempval);
1539 len = TYPE_LENGTH (check_typedef (exp->elts[1].type));
1540 add_memrange (collect, -1, addr, len);
1544 collect_symbol (collect, exp->elts[2].symbol);
1547 default: /* full-fledged expression */
1548 aexpr = gen_trace_for_expr (exp);
1550 old_chain1 = make_cleanup (free_agent_expr, aexpr);
1552 ax_reqs (aexpr, &areqs);
1553 if (areqs.flaw != agent_flaw_none)
1554 error ("malformed expression");
1556 if (areqs.min_height < 0)
1557 error ("gdb: Internal error: expression has min height < 0");
1558 if (areqs.max_height > 20)
1559 error ("expression too complicated, try simplifying");
1561 discard_cleanups (old_chain1);
1562 add_aexpr (collect, aexpr);
1564 /* take care of the registers */
1565 if (areqs.reg_mask_len > 0)
1570 for (ndx1 = 0; ndx1 < areqs.reg_mask_len; ndx1++)
1572 QUIT; /* allow user to bail out with ^C */
1573 if (areqs.reg_mask[ndx1] != 0)
1575 /* assume chars have 8 bits */
1576 for (ndx2 = 0; ndx2 < 8; ndx2++)
1577 if (areqs.reg_mask[ndx1] & (1 << ndx2))
1578 /* it's used -- record it */
1579 add_register (collect, ndx1 * 8 + ndx2);
1585 do_cleanups (old_chain);
1587 } while (action_exp && *action_exp++ == ',');
1589 else if (cmd->function.cfunc == while_stepping_pseudocommand)
1591 collect = &stepping_list;
1593 else if (cmd->function.cfunc == end_actions_pseudocommand)
1595 if (collect == &stepping_list) /* end stepping actions */
1596 collect = &tracepoint_list;
1598 break; /* end tracepoint actions */
1601 memrange_sortmerge (&tracepoint_list);
1602 memrange_sortmerge (&stepping_list);
1604 *tdp_actions = stringify_collection_list (&tracepoint_list, &tdp_buff);
1605 *stepping_actions = stringify_collection_list (&stepping_list, &step_buff);
1609 add_aexpr(collect, aexpr)
1610 struct collection_list *collect;
1611 struct agent_expr *aexpr;
1613 if (collect->next_aexpr_elt >= collect->aexpr_listsize)
1615 collect->aexpr_list =
1616 xrealloc (collect->aexpr_list,
1617 2 * collect->aexpr_listsize * sizeof (struct agent_expr *));
1618 collect->aexpr_listsize *= 2;
1620 collect->aexpr_list[collect->next_aexpr_elt] = aexpr;
1621 collect->next_aexpr_elt++;
1624 static char target_buf[2048];
1626 /* Set "transparent" memory ranges
1628 Allow trace mechanism to treat text-like sections
1629 (and perhaps all read-only sections) transparently,
1630 i.e. don't reject memory requests from these address ranges
1631 just because they haven't been collected. */
1634 remote_set_transparent_ranges (void)
1636 extern bfd *exec_bfd;
1643 return; /* no information to give. */
1645 strcpy (target_buf, "QTro");
1646 for (s = exec_bfd->sections; s; s = s->next)
1650 if ((s->flags & SEC_LOAD) == 0 ||
1651 /* (s->flags & SEC_CODE) == 0 || */
1652 (s->flags & SEC_READONLY) == 0)
1657 size = bfd_get_section_size_before_reloc (s);
1658 sprintf (tmp, ":%x,%x", lma, lma + size);
1659 strcat (target_buf, tmp);
1663 putpkt (target_buf);
1664 getpkt (target_buf, 0);
1670 Tell target to clear any previous trace experiment.
1671 Walk the list of tracepoints, and send them (and their actions)
1672 to the target. If no errors,
1673 Tell target to start a new trace experiment. */
1676 trace_start_command (args, from_tty)
1679 { /* STUB_COMM MOSTLY_IMPLEMENTED */
1680 struct tracepoint *t;
1683 char **stepping_actions;
1685 struct cleanup *old_chain = NULL;
1687 dont_repeat (); /* like "run", dangerous to repeat accidentally */
1689 if (target_is_remote ())
1692 remote_get_noisy_reply (target_buf);
1693 if (strcmp (target_buf, "OK"))
1694 error ("Target does not support this command.");
1698 int ss_count; /* if actions include singlestepping */
1699 int disable_mask; /* ??? */
1700 int enable_mask; /* ??? */
1702 sprintf (buf, "QTDP:%x:%x:%c:%x:%x", t->number, t->address,
1703 t->enabled == enabled ? 'E' : 'D',
1704 t->step_count, t->pass_count);
1709 remote_get_noisy_reply (target_buf);
1710 if (strcmp (target_buf, "OK"))
1711 error ("Target does not support tracepoints.");
1715 encode_actions (t, &tdp_actions, &stepping_actions);
1716 old_chain = make_cleanup (free_actions_list, tdp_actions);
1717 (void) make_cleanup (free_actions_list, stepping_actions);
1719 /* do_single_steps (t); */
1722 for (ndx = 0; tdp_actions[ndx]; ndx++)
1724 QUIT; /* allow user to bail out with ^C */
1725 sprintf (buf, "QTDP:-%x:%x:%s%c",
1726 t->number, t->address,
1728 ((tdp_actions[ndx+1] || stepping_actions)
1731 remote_get_noisy_reply (target_buf);
1732 if (strcmp (target_buf, "OK"))
1733 error ("Error on target while setting tracepoints.");
1736 if (stepping_actions)
1738 for (ndx = 0; stepping_actions[ndx]; ndx++)
1740 QUIT; /* allow user to bail out with ^C */
1741 sprintf (buf, "QTDP:-%x:%x:%s%s%s",
1742 t->number, t->address,
1743 ((ndx == 0) ? "S" : ""),
1744 stepping_actions[ndx],
1745 (stepping_actions[ndx+1] ? "-" : ""));
1747 remote_get_noisy_reply (target_buf);
1748 if (strcmp (target_buf, "OK"))
1749 error ("Error on target while setting tracepoints.");
1753 do_cleanups (old_chain);
1756 /* Tell target to treat text-like sections as transparent */
1757 remote_set_transparent_ranges ();
1758 /* Now insert traps and begin collecting data */
1760 remote_get_noisy_reply (target_buf);
1761 if (strcmp (target_buf, "OK"))
1762 error ("Bogus reply from target: %s", target_buf);
1763 set_traceframe_num (-1); /* all old traceframes invalidated */
1764 set_tracepoint_num (-1);
1765 set_traceframe_context(-1);
1766 trace_running_p = 1;
1769 error ("Trace can only be run on remote targets.");
1774 trace_stop_command (args, from_tty)
1777 { /* STUB_COMM IS_IMPLEMENTED */
1778 if (target_is_remote ())
1781 remote_get_noisy_reply (target_buf);
1782 if (strcmp (target_buf, "OK"))
1783 error ("Bogus reply from target: %s", target_buf);
1784 trace_running_p = 0;
1787 error ("Trace can only be run on remote targets.");
1790 unsigned long trace_running_p;
1792 /* tstatus command */
1794 trace_status_command (args, from_tty)
1797 { /* STUB_COMM IS_IMPLEMENTED */
1798 if (target_is_remote ())
1800 putpkt ("qTStatus");
1801 remote_get_noisy_reply (target_buf);
1803 if (target_buf[0] != 'T' ||
1804 (target_buf[1] != '0' && target_buf[1] != '1'))
1805 error ("Bogus reply from target: %s", target_buf);
1807 /* exported for use by the GUI */
1808 trace_running_p = (target_buf[1] == '1');
1811 error ("Trace can only be run on remote targets.");
1814 /* Worker function for the various flavors of the tfind command */
1816 finish_tfind_command (msg, from_tty)
1820 int target_frameno = -1, target_tracept = -1;
1821 CORE_ADDR old_frame_addr;
1822 struct symbol *old_func;
1825 old_frame_addr = FRAME_FP (get_current_frame ());
1826 old_func = find_pc_function (read_pc ());
1829 reply = remote_get_noisy_reply (msg);
1831 while (reply && *reply)
1834 if ((target_frameno = (int) strtol (++reply, &reply, 16)) == -1)
1836 /* A request for a non-existant trace frame has failed.
1837 Our response will be different, depending on FROM_TTY:
1839 If FROM_TTY is true, meaning that this command was
1840 typed interactively by the user, then give an error
1841 and DO NOT change the state of traceframe_number etc.
1843 However if FROM_TTY is false, meaning that we're either
1844 in a script, a loop, or a user-defined command, then
1845 DON'T give an error, but DO change the state of
1846 traceframe_number etc. to invalid.
1848 The rationalle is that if you typed the command, you
1849 might just have committed a typo or something, and you'd
1850 like to NOT lose your current debugging state. However
1851 if you're in a user-defined command or especially in a
1852 loop, then you need a way to detect that the command
1853 failed WITHOUT aborting. This allows you to write
1854 scripts that search thru the trace buffer until the end,
1855 and then continue on to do something else. */
1858 error ("Target failed to find requested trace frame.");
1862 printf_filtered ("End of trace buffer.\n");
1863 /* The following will not recurse, since it's special-cased */
1864 trace_find_command ("-1", from_tty);
1865 reply = NULL; /* break out of loop,
1866 (avoid recursive nonsense) */
1871 if ((target_tracept = (int) strtol (++reply, &reply, 16)) == -1)
1872 error ("Target failed to find requested trace frame.");
1874 case 'O': /* "OK"? */
1875 if (reply[1] == 'K' && reply[2] == '\0')
1878 error ("Bogus reply from target: %s", reply);
1881 error ("Bogus reply from target: %s", reply);
1884 flush_cached_frames ();
1885 registers_changed ();
1886 select_frame (get_current_frame (), 0);
1887 set_traceframe_num (target_frameno);
1888 set_tracepoint_num (target_tracept);
1889 if (target_frameno == -1)
1890 set_traceframe_context (-1);
1892 set_traceframe_context (read_pc ());
1898 /* NOTE: in immitation of the step command, try to determine
1899 whether we have made a transition from one function to another.
1900 If so, we'll print the "stack frame" (ie. the new function and
1901 it's arguments) -- otherwise we'll just show the new source line.
1903 This determination is made by checking (1) whether the current
1904 function has changed, and (2) whether the current FP has changed.
1905 Hack: if the FP wasn't collected, either at the current or the
1906 previous frame, assume that the FP has NOT changed. */
1908 if (old_func == find_pc_function (read_pc ()) &&
1909 (old_frame_addr == 0 ||
1910 FRAME_FP (get_current_frame ()) == 0 ||
1911 old_frame_addr == FRAME_FP (get_current_frame ())))
1916 print_stack_frame (selected_frame, selected_frame_level, source_only);
1921 /* trace_find_command takes a trace frame number n,
1922 sends "QTFrame:<n>" to the target,
1923 and accepts a reply that may contain several optional pieces
1924 of information: a frame number, a tracepoint number, and an
1925 indication of whether this is a trap frame or a stepping frame.
1927 The minimal response is just "OK" (which indicates that the
1928 target does not give us a frame number or a tracepoint number).
1929 Instead of that, the target may send us a string containing
1931 F<hexnum> (gives the selected frame number)
1932 T<hexnum> (gives the selected tracepoint number)
1937 trace_find_command (args, from_tty)
1940 { /* STUB_COMM PART_IMPLEMENTED */
1941 /* this should only be called with a numeric argument */
1945 if (target_is_remote ())
1947 if (args == 0 || *args == 0)
1948 { /* TFIND with no args means find NEXT trace frame. */
1949 if (traceframe_number == -1)
1950 frameno = 0; /* "next" is first one */
1952 frameno = traceframe_number + 1;
1954 else if (0 == strcmp (args, "-"))
1956 if (traceframe_number == -1)
1957 error ("not debugging trace buffer");
1958 else if (from_tty && traceframe_number == 0)
1959 error ("already at start of trace buffer");
1961 frameno = traceframe_number - 1;
1964 frameno = parse_and_eval_address (args);
1967 error ("invalid input (%d is less than zero)", frameno);
1969 sprintf (target_buf, "QTFrame:%x", frameno);
1970 finish_tfind_command (target_buf, from_tty);
1973 error ("Trace can only be run on remote targets.");
1978 trace_find_end_command (args, from_tty)
1982 trace_find_command ("-1", from_tty);
1987 trace_find_none_command (args, from_tty)
1991 trace_find_command ("-1", from_tty);
1996 trace_find_start_command (args, from_tty)
2000 trace_find_command ("0", from_tty);
2003 /* tfind pc command */
2005 trace_find_pc_command (args, from_tty)
2008 { /* STUB_COMM PART_IMPLEMENTED */
2012 if (target_is_remote ())
2014 if (args == 0 || *args == 0)
2015 pc = read_pc (); /* default is current pc */
2017 pc = parse_and_eval_address (args);
2019 sprintf (target_buf, "QTFrame:pc:%x", pc);
2020 finish_tfind_command (target_buf, from_tty);
2023 error ("Trace can only be run on remote targets.");
2026 /* tfind tracepoint command */
2028 trace_find_tracepoint_command (args, from_tty)
2031 { /* STUB_COMM PART_IMPLEMENTED */
2035 if (target_is_remote ())
2037 if (args == 0 || *args == 0)
2038 if (tracepoint_number == -1)
2039 error ("No current tracepoint -- please supply an argument.");
2041 tdp = tracepoint_number; /* default is current TDP */
2043 tdp = parse_and_eval_address (args);
2045 sprintf (target_buf, "QTFrame:tdp:%x", tdp);
2046 finish_tfind_command (target_buf, from_tty);
2049 error ("Trace can only be run on remote targets.");
2052 /* TFIND LINE command:
2054 This command will take a sourceline for argument, just like BREAK
2055 or TRACE (ie. anything that "decode_line_1" can handle).
2057 With no argument, this command will find the next trace frame
2058 corresponding to a source line OTHER THAN THE CURRENT ONE. */
2061 trace_find_line_command (args, from_tty)
2064 { /* STUB_COMM PART_IMPLEMENTED */
2065 static CORE_ADDR start_pc, end_pc;
2066 struct symtabs_and_lines sals;
2067 struct symtab_and_line sal;
2069 struct cleanup *old_chain;
2071 if (target_is_remote ())
2073 if (args == 0 || *args == 0)
2075 sal = find_pc_line ((get_current_frame ())->pc, 0);
2077 sals.sals = (struct symtab_and_line *)
2078 xmalloc (sizeof (struct symtab_and_line));
2083 sals = decode_line_spec (args, 1);
2087 old_chain = make_cleanup (free, sals.sals);
2088 if (sal.symtab == 0)
2090 printf_filtered ("TFIND: No line number information available");
2093 /* This is useful for "info line *0x7f34". If we can't tell the
2094 user about a source line, at least let them have the symbolic
2096 printf_filtered (" for address ");
2098 print_address (sal.pc, gdb_stdout);
2099 printf_filtered (";\n -- will attempt to find by PC. \n");
2103 printf_filtered (".\n");
2104 return; /* no line, no PC; what can we do? */
2107 else if (sal.line > 0
2108 && find_line_pc_range (sal, &start_pc, &end_pc))
2110 if (start_pc == end_pc)
2112 printf_filtered ("Line %d of \"%s\"",
2113 sal.line, sal.symtab->filename);
2115 printf_filtered (" is at address ");
2116 print_address (start_pc, gdb_stdout);
2118 printf_filtered (" but contains no code.\n");
2119 sal = find_pc_line (start_pc, 0);
2121 find_line_pc_range (sal, &start_pc, &end_pc) &&
2123 printf_filtered ("Attempting to find line %d instead.\n",
2126 error ("Cannot find a good line.");
2130 /* Is there any case in which we get here, and have an address
2131 which the user would want to see? If we have debugging symbols
2132 and no line numbers? */
2133 error ("Line number %d is out of range for \"%s\".\n",
2134 sal.line, sal.symtab->filename);
2136 if (args && *args) /* find within range of stated line */
2137 sprintf (target_buf, "QTFrame:range:%x:%x", start_pc, end_pc - 1);
2138 else /* find OUTSIDE OF range of CURRENT line */
2139 sprintf (target_buf, "QTFrame:outside:%x:%x", start_pc, end_pc - 1);
2140 finish_tfind_command (target_buf, from_tty);
2141 do_cleanups (old_chain);
2144 error ("Trace can only be run on remote targets.");
2147 /* tfind range command */
2149 trace_find_range_command (args, from_tty)
2152 { /* STUB_COMM PART_IMPLEMENTED */
2153 static CORE_ADDR start, stop;
2156 if (target_is_remote ())
2158 if (args == 0 || *args == 0)
2159 { /* XXX FIXME: what should default behavior be? */
2160 printf_filtered ("Usage: tfind range <startaddr>,<endaddr>\n");
2164 if (0 != (tmp = strchr (args, ',' )))
2166 *tmp++ = '\0'; /* terminate start address */
2167 while (isspace (*tmp))
2169 start = parse_and_eval_address (args);
2170 stop = parse_and_eval_address (tmp);
2173 { /* no explicit end address? */
2174 start = parse_and_eval_address (args);
2175 stop = start + 1; /* ??? */
2178 sprintf (target_buf, "QTFrame:range:%x:%x", start, stop);
2179 finish_tfind_command (target_buf, from_tty);
2182 error ("Trace can only be run on remote targets.");
2185 /* tfind outside command */
2187 trace_find_outside_command (args, from_tty)
2190 { /* STUB_COMM PART_IMPLEMENTED */
2191 CORE_ADDR start, stop;
2194 if (target_is_remote ())
2196 if (args == 0 || *args == 0)
2197 { /* XXX FIXME: what should default behavior be? */
2198 printf_filtered ("Usage: tfind outside <startaddr>,<endaddr>\n");
2202 if (0 != (tmp = strchr (args, ',' )))
2204 *tmp++ = '\0'; /* terminate start address */
2205 while (isspace (*tmp))
2207 start = parse_and_eval_address (args);
2208 stop = parse_and_eval_address (tmp);
2211 { /* no explicit end address? */
2212 start = parse_and_eval_address (args);
2213 stop = start + 1; /* ??? */
2216 sprintf (target_buf, "QTFrame:outside:%x:%x", start, stop);
2217 finish_tfind_command (target_buf, from_tty);
2220 error ("Trace can only be run on remote targets.");
2223 /* save-tracepoints command */
2225 tracepoint_save_command (args, from_tty)
2229 struct tracepoint *tp;
2230 struct action_line *line;
2232 char *i1 = " ", *i2 = " ";
2233 char *indent, *actionline;
2235 if (args == 0 || *args == 0)
2236 error ("Argument required (file name in which to save tracepoints");
2238 if (tracepoint_chain == 0)
2240 warning ("save-tracepoints: no tracepoints to save.\n");
2244 if (!(fp = fopen (args, "w")))
2245 error ("Unable to open file '%s' for saving tracepoints");
2247 ALL_TRACEPOINTS (tp)
2249 if (tp->addr_string)
2250 fprintf (fp, "trace %s\n", tp->addr_string);
2252 fprintf (fp, "trace *0x%x\n", tp->address);
2255 fprintf (fp, " passcount %d\n", tp->pass_count);
2259 fprintf (fp, " actions\n");
2261 for (line = tp->actions; line; line = line->next)
2263 struct cmd_list_element *cmd;
2265 QUIT; /* allow user to bail out with ^C */
2266 actionline = line->action;
2267 while (isspace(*actionline))
2270 fprintf (fp, "%s%s\n", indent, actionline);
2271 if (*actionline != '#') /* skip for comment lines */
2273 cmd = lookup_cmd (&actionline, cmdlist, "", -1, 1);
2275 error ("Bad action list item: %s", actionline);
2276 if (cmd->function.cfunc == while_stepping_pseudocommand)
2278 else if (cmd->function.cfunc == end_actions_pseudocommand)
2286 printf_filtered ("Tracepoints saved to file '%s'.\n", args);
2290 /* info scope command: list the locals for a scope. */
2292 scope_info (args, from_tty)
2296 struct symtab_and_line sal;
2297 struct symtabs_and_lines sals;
2299 struct minimal_symbol *msym;
2300 struct block *block;
2301 char **canonical, *symname, *save_args = args;
2302 int i, nsyms, count = 0;
2304 if (args == 0 || *args == 0)
2305 error ("requires an argument (function, line or *addr) to define a scope");
2307 sals = decode_line_1 (&args, 1, NULL, 0, &canonical);
2308 if (sals.nelts == 0)
2309 return; /* presumably decode_line_1 has already warned */
2311 /* Resolve line numbers to PC */
2312 resolve_sal_pc (&sals.sals[0]);
2313 block = block_for_pc (sals.sals[0].pc);
2317 QUIT; /* allow user to bail out with ^C */
2318 nsyms = BLOCK_NSYMS (block);
2319 for (i = 0; i < nsyms; i++)
2321 QUIT; /* allow user to bail out with ^C */
2323 printf_filtered ("Scope for %s:\n", save_args);
2325 sym = BLOCK_SYM (block, i);
2326 symname = SYMBOL_NAME (sym);
2327 if (symname == NULL || *symname == '\0')
2328 continue; /* probably botched, certainly useless */
2330 printf_filtered ("Symbol %s is ", symname);
2331 switch (SYMBOL_CLASS (sym)) {
2333 case LOC_UNDEF: /* messed up symbol? */
2334 printf_filtered ("a bogus symbol, class %d.\n",
2335 SYMBOL_CLASS (sym));
2336 count--; /* don't count this one */
2339 printf_filtered ("a constant with value %d (0x%x)",
2340 SYMBOL_VALUE (sym), SYMBOL_VALUE (sym));
2342 case LOC_CONST_BYTES:
2343 printf_filtered ("constant bytes: ");
2344 if (SYMBOL_TYPE (sym))
2345 for (i = 0; i < TYPE_LENGTH (SYMBOL_TYPE (sym)); i++)
2346 fprintf_filtered (gdb_stdout, " %02x",
2347 (unsigned) SYMBOL_VALUE_BYTES (sym) [i]);
2350 printf_filtered ("in static storage at address ");
2351 print_address_numeric (SYMBOL_VALUE_ADDRESS (sym), 1, gdb_stdout);
2354 printf_filtered ("a local variable in register $%s",
2355 reg_names [SYMBOL_VALUE (sym)]);
2359 printf_filtered ("an argument at stack/frame offset %ld",
2360 SYMBOL_VALUE (sym));
2363 printf_filtered ("a local variable at frame offset %ld",
2364 SYMBOL_VALUE (sym));
2367 printf_filtered ("a reference argument at offset %ld",
2368 SYMBOL_VALUE (sym));
2371 printf_filtered ("an argument in register $%s",
2372 reg_names[SYMBOL_VALUE (sym)]);
2374 case LOC_REGPARM_ADDR:
2375 printf_filtered ("the address of an argument, in register $%s",
2376 reg_names[SYMBOL_VALUE (sym)]);
2379 printf_filtered ("a typedef.\n");
2382 printf_filtered ("a label at address ");
2383 print_address_numeric (SYMBOL_VALUE_ADDRESS (sym), 1, gdb_stdout);
2386 printf_filtered ("a function at address ");
2387 print_address_numeric (BLOCK_START (SYMBOL_BLOCK_VALUE (sym)), 1,
2391 printf_filtered ("a variable at offset %d from register $%s",
2393 reg_names [SYMBOL_BASEREG (sym)]);
2395 case LOC_BASEREG_ARG:
2396 printf_filtered ("an argument at offset %d from register $%s",
2398 reg_names [SYMBOL_BASEREG (sym)]);
2400 case LOC_UNRESOLVED:
2401 msym = lookup_minimal_symbol (SYMBOL_NAME (sym), NULL, NULL);
2403 printf_filtered ("Unresolved Static");
2406 printf_filtered ("static storage at address ");
2407 print_address_numeric (SYMBOL_VALUE_ADDRESS (msym), 1,
2411 case LOC_OPTIMIZED_OUT:
2412 printf_filtered ("optimized out.\n");
2415 if (SYMBOL_TYPE (sym))
2416 printf_filtered (", length %d.\n",
2417 TYPE_LENGTH (check_typedef (SYMBOL_TYPE (sym))));
2419 if (BLOCK_FUNCTION (block))
2422 block = BLOCK_SUPERBLOCK (block);
2425 printf_filtered ("Scope for %s contains no locals or arguments.\n",
2429 /* worker function (cleanup) */
2431 replace_comma (comma)
2439 trace_dump_command (args, from_tty)
2443 struct tracepoint *t;
2444 struct action_line *action;
2445 char *action_exp, *next_comma;
2446 struct cleanup *old_cleanups;
2447 int stepping_actions = 0;
2448 int stepping_frame = 0;
2450 if (!target_is_remote ())
2452 error ("Trace can only be run on remote targets.");
2456 if (tracepoint_number == -1)
2458 warning ("No current trace frame.");
2463 if (t->number == tracepoint_number)
2467 error ("No known tracepoint matches 'current' tracepoint #%d.",
2470 old_cleanups = make_cleanup (null_cleanup, NULL);
2472 printf_filtered ("Data collected at tracepoint %d, trace frame %d:\n",
2473 tracepoint_number, traceframe_number);
2475 /* The current frame is a trap frame if the frame PC is equal
2476 to the tracepoint PC. If not, then the current frame was
2477 collected during single-stepping. */
2479 stepping_frame = (t->address != read_pc());
2481 for (action = t->actions; action; action = action->next)
2483 struct cmd_list_element *cmd;
2485 QUIT; /* allow user to bail out with ^C */
2486 action_exp = action->action;
2487 while (isspace (*action_exp))
2490 /* The collection actions to be done while stepping are
2491 bracketed by the commands "while-stepping" and "end". */
2493 if (*action_exp == '#') /* comment line */
2496 cmd = lookup_cmd (&action_exp, cmdlist, "", -1, 1);
2498 error ("Bad action list item: %s", action_exp);
2500 if (cmd->function.cfunc == while_stepping_pseudocommand)
2501 stepping_actions = 1;
2502 else if (cmd->function.cfunc == end_actions_pseudocommand)
2503 stepping_actions = 0;
2504 else if (cmd->function.cfunc == collect_pseudocommand)
2506 /* Display the collected data.
2507 For the trap frame, display only what was collected at the trap.
2508 Likewise for stepping frames, display only what was collected
2509 while stepping. This means that the two boolean variables,
2510 STEPPING_FRAME and STEPPING_ACTIONS should be equal. */
2511 if (stepping_frame == stepping_actions)
2513 do { /* repeat over a comma-separated list */
2514 QUIT; /* allow user to bail out with ^C */
2515 if (*action_exp == ',')
2517 while (isspace (*action_exp))
2520 next_comma = strchr (action_exp, ',');
2522 if (0 == strncasecmp (action_exp, "$reg", 4))
2523 registers_info (NULL, from_tty);
2524 else if (0 == strncasecmp (action_exp, "$loc", 4))
2525 locals_info (NULL, from_tty);
2526 else if (0 == strncasecmp (action_exp, "$arg", 4))
2527 args_info (NULL, from_tty);
2532 make_cleanup (replace_comma, next_comma);
2535 printf_filtered ("%s = ", action_exp);
2536 output_command (action_exp, from_tty);
2537 printf_filtered ("\n");
2541 action_exp = next_comma;
2542 } while (action_exp && *action_exp == ',');
2546 discard_cleanups (old_cleanups);
2549 /* Convert the memory pointed to by mem into hex, placing result in buf.
2550 * Return a pointer to the last char put in buf (null)
2551 * "stolen" from sparc-stub.c
2554 static const char hexchars[]="0123456789abcdef";
2556 static unsigned char *
2557 mem2hex(mem, buf, count)
2568 *buf++ = hexchars[ch >> 4];
2569 *buf++ = hexchars[ch & 0xf];
2577 int get_traceframe_number()
2579 return traceframe_number;
2583 /* module initialization */
2585 _initialize_tracepoint ()
2587 tracepoint_chain = 0;
2588 tracepoint_count = 0;
2589 traceframe_number = -1;
2590 tracepoint_number = -1;
2592 set_internalvar (lookup_internalvar ("tpnum"),
2593 value_from_longest (builtin_type_int, (LONGEST) 0));
2594 set_internalvar (lookup_internalvar ("trace_frame"),
2595 value_from_longest (builtin_type_int, (LONGEST) -1));
2597 if (tracepoint_list.list == NULL)
2599 tracepoint_list.listsize = 128;
2600 tracepoint_list.list = xmalloc
2601 (tracepoint_list.listsize * sizeof (struct memrange));
2603 if (tracepoint_list.aexpr_list == NULL)
2605 tracepoint_list.aexpr_listsize = 128;
2606 tracepoint_list.aexpr_list = xmalloc
2607 (tracepoint_list.aexpr_listsize * sizeof (struct agent_expr *));
2610 if (stepping_list.list == NULL)
2612 stepping_list.listsize = 128;
2613 stepping_list.list = xmalloc
2614 (stepping_list.listsize * sizeof (struct memrange));
2617 if (stepping_list.aexpr_list == NULL)
2619 stepping_list.aexpr_listsize = 128;
2620 stepping_list.aexpr_list = xmalloc
2621 (stepping_list.aexpr_listsize * sizeof (struct agent_expr *));
2624 add_info ("scope", scope_info,
2625 "List the variables local to a scope");
2627 add_cmd ("tracepoints", class_trace, NO_FUNCTION,
2628 "Tracing of program execution without stopping the program.",
2631 add_info ("tracepoints", tracepoints_info,
2632 "Status of tracepoints, or tracepoint number NUMBER.\n\
2633 Convenience variable \"$tpnum\" contains the number of the\n\
2634 last tracepoint set.");
2636 add_info_alias ("tp", "tracepoints", 1);
2638 add_com ("save-tracepoints", class_trace, tracepoint_save_command,
2639 "Save current tracepoint definitions as a script.\n\
2640 Use the 'source' command in another debug session to restore them.");
2642 add_com ("tdump", class_trace, trace_dump_command,
2643 "Print everything collected at the current tracepoint.");
2645 add_prefix_cmd ("tfind", class_trace, trace_find_command,
2646 "Select a trace frame;\n\
2647 No argument means forward by one frame; '-' meand backward by one frame.",
2648 &tfindlist, "tfind ", 1, &cmdlist);
2650 add_cmd ("outside", class_trace, trace_find_outside_command,
2651 "Select a trace frame whose PC is outside the given \
2652 range.\nUsage: tfind outside addr1, addr2",
2655 add_cmd ("range", class_trace, trace_find_range_command,
2656 "Select a trace frame whose PC is in the given range.\n\
2657 Usage: tfind range addr1,addr2",
2660 add_cmd ("line", class_trace, trace_find_line_command,
2661 "Select a trace frame by source line.\n\
2662 Argument can be a line number (with optional source file), \n\
2663 a function name, or '*' followed by an address.\n\
2664 Default argument is 'the next source line that was traced'.",
2667 add_cmd ("tracepoint", class_trace, trace_find_tracepoint_command,
2668 "Select a trace frame by tracepoint number.\n\
2669 Default is the tracepoint for the current trace frame.",
2672 add_cmd ("pc", class_trace, trace_find_pc_command,
2673 "Select a trace frame by PC.\n\
2674 Default is the current PC, or the PC of the current trace frame.",
2677 add_cmd ("end", class_trace, trace_find_end_command,
2678 "Synonym for 'none'.\n\
2679 De-select any trace frame and resume 'live' debugging.",
2682 add_cmd ("none", class_trace, trace_find_none_command,
2683 "De-select any trace frame and resume 'live' debugging.",
2686 add_cmd ("start", class_trace, trace_find_start_command,
2687 "Select the first trace frame in the trace buffer.",
2690 add_com ("tstatus", class_trace, trace_status_command,
2691 "Display the status of the current trace data collection.");
2693 add_com ("tstop", class_trace, trace_stop_command,
2694 "Stop trace data collection.");
2696 add_com ("tstart", class_trace, trace_start_command,
2697 "Start trace data collection.");
2699 add_com ("passcount", class_trace, trace_pass_command,
2700 "Set the passcount for a tracepoint.\n\
2701 The trace will end when the tracepoint has been passed 'count' times.\n\
2702 Usage: passcount COUNT TPNUM, where TPNUM may also be \"all\";\n\
2703 if TPNUM is omitted, passcount refers to the last tracepoint defined.");
2705 add_com ("end", class_trace, end_actions_pseudocommand,
2706 "Ends a list of commands or actions.\n\
2707 Several GDB commands allow you to enter a list of commands or actions.\n\
2708 Entering \"end\" on a line by itself is the normal way to terminate\n\
2710 Note: the \"end\" command cannot be used at the gdb prompt.");
2712 add_com ("while-stepping", class_trace, while_stepping_pseudocommand,
2713 "Specify single-stepping behavior at a tracepoint.\n\
2714 Argument is number of instructions to trace in single-step mode\n\
2715 following the tracepoint. This command is normally followed by\n\
2716 one or more \"collect\" commands, to specify what to collect\n\
2717 while single-stepping.\n\n\
2718 Note: this command can only be used in a tracepoint \"actions\" list.");
2720 add_com_alias ("ws", "while-stepping", class_alias, 0);
2721 add_com_alias ("stepping", "while-stepping", class_alias, 0);
2723 add_com ("collect", class_trace, collect_pseudocommand,
2724 "Specify one or more data items to be collected at a tracepoint.\n\
2725 Accepts a comma-separated list of (one or more) expressions. GDB will\n\
2726 collect all data (variables, registers) referenced by that expression.\n\
2727 Also accepts the following special arguments:\n\
2728 $regs -- all registers.\n\
2729 $args -- all function arguments.\n\
2730 $locals -- all variables local to the block/function scope.\n\
2731 Note: this command can only be used in a tracepoint \"actions\" list.");
2733 add_com ("actions", class_trace, trace_actions_command,
2734 "Specify the actions to be taken at a tracepoint.\n\
2735 Tracepoint actions may include collecting of specified data, \n\
2736 single-stepping, or enabling/disabling other tracepoints, \n\
2737 depending on target's capabilities.");
2739 add_cmd ("tracepoints", class_trace, delete_trace_command,
2740 "Delete specified tracepoints.\n\
2741 Arguments are tracepoint numbers, separated by spaces.\n\
2742 No argument means delete all tracepoints.",
2745 add_cmd ("tracepoints", class_trace, disable_trace_command,
2746 "Disable specified tracepoints.\n\
2747 Arguments are tracepoint numbers, separated by spaces.\n\
2748 No argument means disable all tracepoints.",
2751 add_cmd ("tracepoints", class_trace, enable_trace_command,
2752 "Enable specified tracepoints.\n\
2753 Arguments are tracepoint numbers, separated by spaces.\n\
2754 No argument means enable all tracepoints.",
2757 add_com ("trace", class_trace, trace_command,
2758 "Set a tracepoint at a specified line or function or address.\n\
2759 Argument may be a line number, function name, or '*' plus an address.\n\
2760 For a line number or function, trace at the start of its code.\n\
2761 If an address is specified, trace at that exact address.\n\n\
2762 Do \"help tracepoints\" for info on other tracepoint commands.");
2764 add_com_alias ("tp", "trace", class_alias, 0);
2765 add_com_alias ("tr", "trace", class_alias, 1);
2766 add_com_alias ("tra", "trace", class_alias, 1);
2767 add_com_alias ("trac", "trace", class_alias, 1);