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/* Tracing functionality for remote targets in custom GDB protocol
Copyright (C) 1997-2012 Free Software Foundation, Inc.
This file is part of GDB.
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 "arch-utils.h"
#include "symtab.h"
#include "frame.h"
#include "gdbtypes.h"
#include "expression.h"
#include "gdbcmd.h"
#include "value.h"
#include "target.h"
#include "language.h"
#include "gdb_string.h"
#include "inferior.h"
#include "breakpoint.h"
#include "tracepoint.h"
#include "linespec.h"
#include "regcache.h"
#include "completer.h"
#include "block.h"
#include "dictionary.h"
#include "observer.h"
#include "user-regs.h"
#include "valprint.h"
#include "gdbcore.h"
#include "objfiles.h"
#include "filenames.h"
#include "gdbthread.h"
#include "stack.h"
#include "gdbcore.h"
#include "remote.h"
#include "source.h"
#include "ax.h"
#include "ax-gdb.h"
#include "memrange.h"
#include "exceptions.h"
#include "cli/cli-utils.h"
#include "probe.h"
/* readline include files */
#include "readline/readline.h"
#include "readline/history.h"
/* readline defines this. */
#undef savestring
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifndef O_LARGEFILE
#define O_LARGEFILE 0
#endif
extern int hex2bin (const char *hex, gdb_byte *bin, int count);
extern int bin2hex (const gdb_byte *bin, char *hex, int count);
/* Maximum length of an agent aexpression.
This accounts for the fact that packets are limited to 400 bytes
(which includes everything -- including the checksum), and assumes
the worst case of maximum length for each of the pieces of a
continuation packet.
NOTE: expressions get mem2hex'ed otherwise this would be twice as
large. (400 - 31)/2 == 184 */
#define MAX_AGENT_EXPR_LEN 184
#define TFILE_PID (1)
/* A hook used to notify the UI of tracepoint operations. */
void (*deprecated_trace_find_hook) (char *arg, int from_tty);
void (*deprecated_trace_start_stop_hook) (int start, int from_tty);
extern void (*deprecated_readline_begin_hook) (char *, ...);
extern char *(*deprecated_readline_hook) (char *);
extern void (*deprecated_readline_end_hook) (void);
/* GDB commands implemented in other modules:
*/
extern void output_command (char *, int);
/*
Tracepoint.c:
This module defines the following debugger commands:
trace : set a tracepoint on a function, line, or address.
info trace : list all debugger-defined tracepoints.
delete trace : delete one or more tracepoints.
enable trace : enable one or more tracepoints.
disable trace : disable one or more tracepoints.
actions : specify actions to be taken at a tracepoint.
passcount : specify a pass count for a tracepoint.
tstart : start a trace experiment.
tstop : stop a trace experiment.
tstatus : query the status of a trace experiment.
tfind : find a trace frame in the trace buffer.
tdump : print everything collected at the current tracepoint.
save-tracepoints : write tracepoint setup into a file.
This module defines the following user-visible debugger variables:
$trace_frame : sequence number of trace frame currently being debugged.
$trace_line : source line of trace frame currently being debugged.
$trace_file : source file of trace frame currently being debugged.
$tracepoint : tracepoint number of trace frame currently being debugged.
*/
/* ======= Important global variables: ======= */
/* The list of all trace state variables. We don't retain pointers to
any of these for any reason - API is by name or number only - so it
works to have a vector of objects. */
typedef struct trace_state_variable tsv_s;
DEF_VEC_O(tsv_s);
/* An object describing the contents of a traceframe. */
struct traceframe_info
{
/* Collected memory. */
VEC(mem_range_s) *memory;
};
static VEC(tsv_s) *tvariables;
/* The next integer to assign to a variable. */
static int next_tsv_number = 1;
/* Number of last traceframe collected. */
static int traceframe_number;
/* Tracepoint for last traceframe collected. */
static int tracepoint_number;
/* Symbol for function for last traceframe collected. */
static struct symbol *traceframe_fun;
/* Symtab and line for last traceframe collected. */
static struct symtab_and_line traceframe_sal;
/* The traceframe info of the current traceframe. NULL if we haven't
yet attempted to fetch it, or if the target does not support
fetching this object, or if we're not inspecting a traceframe
presently. */
static struct traceframe_info *traceframe_info;
/* Tracing command lists. */
static struct cmd_list_element *tfindlist;
/* List of expressions to collect by default at each tracepoint hit. */
char *default_collect = "";
static int disconnected_tracing;
/* This variable controls whether we ask the target for a linear or
circular trace buffer. */
static int circular_trace_buffer;
/* Textual notes applying to the current and/or future trace runs. */
char *trace_user = NULL;
/* Textual notes applying to the current and/or future trace runs. */
char *trace_notes = NULL;
/* Textual notes applying to the stopping of a trace. */
char *trace_stop_notes = NULL;
/* ======= Important command functions: ======= */
static void trace_actions_command (char *, int);
static void trace_start_command (char *, int);
static void trace_stop_command (char *, int);
static void trace_status_command (char *, int);
static void trace_find_command (char *, int);
static void trace_find_pc_command (char *, int);
static void trace_find_tracepoint_command (char *, int);
static void trace_find_line_command (char *, int);
static void trace_find_range_command (char *, int);
static void trace_find_outside_command (char *, int);
static void trace_dump_command (char *, int);
/* support routines */
struct collection_list;
static void add_aexpr (struct collection_list *, struct agent_expr *);
static char *mem2hex (gdb_byte *, char *, int);
static void add_register (struct collection_list *collection,
unsigned int regno);
static void free_uploaded_tps (struct uploaded_tp **utpp);
static void free_uploaded_tsvs (struct uploaded_tsv **utsvp);
extern void _initialize_tracepoint (void);
static struct trace_status trace_status;
char *stop_reason_names[] = {
"tunknown",
"tnotrun",
"tstop",
"tfull",
"tdisconnected",
"tpasscount",
"terror"
};
struct trace_status *
current_trace_status (void)
{
return &trace_status;
}
/* Destroy INFO. */
static void
free_traceframe_info (struct traceframe_info *info)
{
if (info != NULL)
{
VEC_free (mem_range_s, info->memory);
xfree (info);
}
}
/* Free and clear the traceframe info cache of the current
traceframe. */
static void
clear_traceframe_info (void)
{
free_traceframe_info (traceframe_info);
traceframe_info = NULL;
}
/* Set traceframe number to NUM. */
static void
set_traceframe_num (int num)
{
traceframe_number = num;
set_internalvar_integer (lookup_internalvar ("trace_frame"), num);
}
/* Set tracepoint number to NUM. */
static void
set_tracepoint_num (int num)
{
tracepoint_number = num;
set_internalvar_integer (lookup_internalvar ("tracepoint"), num);
}
/* Set externally visible debug variables for querying/printing
the traceframe context (line, function, file). */
static void
set_traceframe_context (struct frame_info *trace_frame)
{
CORE_ADDR trace_pc;
/* Save as globals for internal use. */
if (trace_frame != NULL
&& get_frame_pc_if_available (trace_frame, &trace_pc))
{
traceframe_sal = find_pc_line (trace_pc, 0);
traceframe_fun = find_pc_function (trace_pc);
/* Save linenumber as "$trace_line", a debugger variable visible to
users. */
set_internalvar_integer (lookup_internalvar ("trace_line"),
traceframe_sal.line);
}
else
{
init_sal (&traceframe_sal);
traceframe_fun = NULL;
set_internalvar_integer (lookup_internalvar ("trace_line"), -1);
}
/* Save func name as "$trace_func", a debugger variable visible to
users. */
if (traceframe_fun == NULL
|| SYMBOL_LINKAGE_NAME (traceframe_fun) == NULL)
clear_internalvar (lookup_internalvar ("trace_func"));
else
set_internalvar_string (lookup_internalvar ("trace_func"),
SYMBOL_LINKAGE_NAME (traceframe_fun));
/* Save file name as "$trace_file", a debugger variable visible to
users. */
if (traceframe_sal.symtab == NULL
|| traceframe_sal.symtab->filename == NULL)
clear_internalvar (lookup_internalvar ("trace_file"));
else
set_internalvar_string (lookup_internalvar ("trace_file"),
traceframe_sal.symtab->filename);
}
/* Create a new trace state variable with the given name. */
struct trace_state_variable *
create_trace_state_variable (const char *name)
{
struct trace_state_variable tsv;
memset (&tsv, 0, sizeof (tsv));
tsv.name = xstrdup (name);
tsv.number = next_tsv_number++;
return VEC_safe_push (tsv_s, tvariables, &tsv);
}
/* Look for a trace state variable of the given name. */
struct trace_state_variable *
find_trace_state_variable (const char *name)
{
struct trace_state_variable *tsv;
int ix;
for (ix = 0; VEC_iterate (tsv_s, tvariables, ix, tsv); ++ix)
if (strcmp (name, tsv->name) == 0)
return tsv;
return NULL;
}
static void
delete_trace_state_variable (const char *name)
{
struct trace_state_variable *tsv;
int ix;
for (ix = 0; VEC_iterate (tsv_s, tvariables, ix, tsv); ++ix)
if (strcmp (name, tsv->name) == 0)
{
xfree ((void *)tsv->name);
VEC_unordered_remove (tsv_s, tvariables, ix);
return;
}
warning (_("No trace variable named \"$%s\", not deleting"), name);
}
/* The 'tvariable' command collects a name and optional expression to
evaluate into an initial value. */
static void
trace_variable_command (char *args, int from_tty)
{
struct expression *expr;
struct cleanup *old_chain;
struct internalvar *intvar = NULL;
LONGEST initval = 0;
struct trace_state_variable *tsv;
if (!args || !*args)
error_no_arg (_("trace state variable name"));
/* All the possible valid arguments are expressions. */
expr = parse_expression (args);
old_chain = make_cleanup (free_current_contents, &expr);
if (expr->nelts == 0)
error (_("No expression?"));
/* Only allow two syntaxes; "$name" and "$name=value". */
if (expr->elts[0].opcode == OP_INTERNALVAR)
{
intvar = expr->elts[1].internalvar;
}
else if (expr->elts[0].opcode == BINOP_ASSIGN
&& expr->elts[1].opcode == OP_INTERNALVAR)
{
intvar = expr->elts[2].internalvar;
initval = value_as_long (evaluate_subexpression_type (expr, 4));
}
else
error (_("Syntax must be $NAME [ = EXPR ]"));
if (!intvar)
error (_("No name given"));
if (strlen (internalvar_name (intvar)) <= 0)
error (_("Must supply a non-empty variable name"));
/* If the variable already exists, just change its initial value. */
tsv = find_trace_state_variable (internalvar_name (intvar));
if (tsv)
{
tsv->initial_value = initval;
printf_filtered (_("Trace state variable $%s "
"now has initial value %s.\n"),
tsv->name, plongest (tsv->initial_value));
do_cleanups (old_chain);
return;
}
/* Create a new variable. */
tsv = create_trace_state_variable (internalvar_name (intvar));
tsv->initial_value = initval;
printf_filtered (_("Trace state variable $%s "
"created, with initial value %s.\n"),
tsv->name, plongest (tsv->initial_value));
do_cleanups (old_chain);
}
static void
delete_trace_variable_command (char *args, int from_tty)
{
int ix;
char **argv;
struct cleanup *back_to;
if (args == NULL)
{
if (query (_("Delete all trace state variables? ")))
VEC_free (tsv_s, tvariables);
dont_repeat ();
return;
}
argv = gdb_buildargv (args);
back_to = make_cleanup_freeargv (argv);
for (ix = 0; argv[ix] != NULL; ix++)
{
if (*argv[ix] == '$')
delete_trace_state_variable (argv[ix] + 1);
else
warning (_("Name \"%s\" not prefixed with '$', ignoring"), argv[ix]);
}
do_cleanups (back_to);
dont_repeat ();
}
void
tvariables_info_1 (void)
{
struct trace_state_variable *tsv;
int ix;
int count = 0;
struct cleanup *back_to;
struct ui_out *uiout = current_uiout;
if (VEC_length (tsv_s, tvariables) == 0 && !ui_out_is_mi_like_p (uiout))
{
printf_filtered (_("No trace state variables.\n"));
return;
}
/* Try to acquire values from the target. */
for (ix = 0; VEC_iterate (tsv_s, tvariables, ix, tsv); ++ix, ++count)
tsv->value_known = target_get_trace_state_variable_value (tsv->number,
&(tsv->value));
back_to = make_cleanup_ui_out_table_begin_end (uiout, 3,
count, "trace-variables");
ui_out_table_header (uiout, 15, ui_left, "name", "Name");
ui_out_table_header (uiout, 11, ui_left, "initial", "Initial");
ui_out_table_header (uiout, 11, ui_left, "current", "Current");
ui_out_table_body (uiout);
for (ix = 0; VEC_iterate (tsv_s, tvariables, ix, tsv); ++ix)
{
struct cleanup *back_to2;
char *c;
char *name;
back_to2 = make_cleanup_ui_out_tuple_begin_end (uiout, "variable");
name = concat ("$", tsv->name, (char *) NULL);
make_cleanup (xfree, name);
ui_out_field_string (uiout, "name", name);
ui_out_field_string (uiout, "initial", plongest (tsv->initial_value));
if (tsv->value_known)
c = plongest (tsv->value);
else if (ui_out_is_mi_like_p (uiout))
/* For MI, we prefer not to use magic string constants, but rather
omit the field completely. The difference between unknown and
undefined does not seem important enough to represent. */
c = NULL;
else if (current_trace_status ()->running || traceframe_number >= 0)
/* The value is/was defined, but we don't have it. */
c = "<unknown>";
else
/* It is not meaningful to ask about the value. */
c = "<undefined>";
if (c)
ui_out_field_string (uiout, "current", c);
ui_out_text (uiout, "\n");
do_cleanups (back_to2);
}
do_cleanups (back_to);
}
/* List all the trace state variables. */
static void
tvariables_info (char *args, int from_tty)
{
tvariables_info_1 ();
}
/* Stash definitions of tsvs into the given file. */
void
save_trace_state_variables (struct ui_file *fp)
{
struct trace_state_variable *tsv;
int ix;
for (ix = 0; VEC_iterate (tsv_s, tvariables, ix, tsv); ++ix)
{
fprintf_unfiltered (fp, "tvariable $%s", tsv->name);
if (tsv->initial_value)
fprintf_unfiltered (fp, " = %s", plongest (tsv->initial_value));
fprintf_unfiltered (fp, "\n");
}
}
/* ACTIONS functions: */
/* The three functions:
collect_pseudocommand,
while_stepping_pseudocommand, and
end_actions_pseudocommand
are placeholders for "commands" that are actually ONLY to be used
within a tracepoint action list. If the actual function is ever called,
it means that somebody issued the "command" at the top level,
which is always an error. */
void
end_actions_pseudocommand (char *args, int from_tty)
{
error (_("This command cannot be used at the top level."));
}
void
while_stepping_pseudocommand (char *args, int from_tty)
{
error (_("This command can only be used in a tracepoint actions list."));
}
static void
collect_pseudocommand (char *args, int from_tty)
{
error (_("This command can only be used in a tracepoint actions list."));
}
static void
teval_pseudocommand (char *args, int from_tty)
{
error (_("This command can only be used in a tracepoint actions list."));
}
/* Parse any collection options, such as /s for strings. */
char *
decode_agent_options (char *exp)
{
struct value_print_options opts;
if (*exp != '/')
return exp;
/* Call this to borrow the print elements default for collection
size. */
get_user_print_options (&opts);
exp++;
if (*exp == 's')
{
if (target_supports_string_tracing ())
{
/* Allow an optional decimal number giving an explicit maximum
string length, defaulting it to the "print elements" value;
so "collect/s80 mystr" gets at most 80 bytes of string. */
trace_string_kludge = opts.print_max;
exp++;
if (*exp >= '0' && *exp <= '9')
trace_string_kludge = atoi (exp);
while (*exp >= '0' && *exp <= '9')
exp++;
}
else
error (_("Target does not support \"/s\" option for string tracing."));
}
else
error (_("Undefined collection format \"%c\"."), *exp);
exp = skip_spaces (exp);
return exp;
}
/* Enter a list of actions for a tracepoint. */
static void
trace_actions_command (char *args, int from_tty)
{
struct tracepoint *t;
struct command_line *l;
t = get_tracepoint_by_number (&args, NULL, 1);
if (t)
{
char *tmpbuf =
xstrprintf ("Enter actions for tracepoint %d, one per line.",
t->base.number);
struct cleanup *cleanups = make_cleanup (xfree, tmpbuf);
l = read_command_lines (tmpbuf, from_tty, 1,
check_tracepoint_command, t);
do_cleanups (cleanups);
breakpoint_set_commands (&t->base, l);
}
/* else just return */
}
/* Report the results of checking the agent expression, as errors or
internal errors. */
static void
report_agent_reqs_errors (struct agent_expr *aexpr)
{
/* All of the "flaws" are serious bytecode generation issues that
should never occur. */
if (aexpr->flaw != agent_flaw_none)
internal_error (__FILE__, __LINE__, _("expression is malformed"));
/* If analysis shows a stack underflow, GDB must have done something
badly wrong in its bytecode generation. */
if (aexpr->min_height < 0)
internal_error (__FILE__, __LINE__,
_("expression has min height < 0"));
/* Issue this error if the stack is predicted to get too deep. The
limit is rather arbitrary; a better scheme might be for the
target to report how much stack it will have available. The
depth roughly corresponds to parenthesization, so a limit of 20
amounts to 20 levels of expression nesting, which is actually
a pretty big hairy expression. */
if (aexpr->max_height > 20)
error (_("Expression is too complicated."));
}
/* worker function */
void
validate_actionline (char **line, struct breakpoint *b)
{
struct cmd_list_element *c;
struct expression *exp = NULL;
struct cleanup *old_chain = NULL;
char *p, *tmp_p;
struct bp_location *loc;
struct agent_expr *aexpr;
struct tracepoint *t = (struct tracepoint *) b;
/* If EOF is typed, *line is NULL. */
if (*line == NULL)
return;
for (p = *line; isspace ((int) *p);)
p++;
/* Symbol lookup etc. */
if (*p == '\0') /* empty line: just prompt for another line. */
return;
if (*p == '#') /* comment line */
return;
c = lookup_cmd (&p, cmdlist, "", -1, 1);
if (c == 0)
error (_("`%s' is not a tracepoint action, or is ambiguous."), p);
if (cmd_cfunc_eq (c, collect_pseudocommand))
{
trace_string_kludge = 0;
if (*p == '/')
p = decode_agent_options (p);
do
{ /* Repeat over a comma-separated list. */
QUIT; /* Allow user to bail out with ^C. */
while (isspace ((int) *p))
p++;
if (*p == '$') /* Look for special pseudo-symbols. */
{
if (0 == strncasecmp ("reg", p + 1, 3)
|| 0 == strncasecmp ("arg", p + 1, 3)
|| 0 == strncasecmp ("loc", p + 1, 3)
|| 0 == strncasecmp ("_ret", p + 1, 4)
|| 0 == strncasecmp ("_sdata", p + 1, 6))
{
p = strchr (p, ',');
continue;
}
/* else fall thru, treat p as an expression and parse it! */
}
tmp_p = p;
for (loc = t->base.loc; loc; loc = loc->next)
{
p = tmp_p;
exp = parse_exp_1 (&p, loc->address,
block_for_pc (loc->address), 1);
old_chain = make_cleanup (free_current_contents, &exp);
if (exp->elts[0].opcode == OP_VAR_VALUE)
{
if (SYMBOL_CLASS (exp->elts[2].symbol) == LOC_CONST)
{
error (_("constant `%s' (value %s) "
"will not be collected."),
SYMBOL_PRINT_NAME (exp->elts[2].symbol),
plongest (SYMBOL_VALUE (exp->elts[2].symbol)));
}
else if (SYMBOL_CLASS (exp->elts[2].symbol)
== LOC_OPTIMIZED_OUT)
{
error (_("`%s' is optimized away "
"and cannot be collected."),
SYMBOL_PRINT_NAME (exp->elts[2].symbol));
}
}
/* We have something to collect, make sure that the expr to
bytecode translator can handle it and that it's not too
long. */
aexpr = gen_trace_for_expr (loc->address, exp);
make_cleanup_free_agent_expr (aexpr);
if (aexpr->len > MAX_AGENT_EXPR_LEN)
error (_("Expression is too complicated."));
ax_reqs (aexpr);
report_agent_reqs_errors (aexpr);
do_cleanups (old_chain);
}
}
while (p && *p++ == ',');
}
else if (cmd_cfunc_eq (c, teval_pseudocommand))
{
do
{ /* Repeat over a comma-separated list. */
QUIT; /* Allow user to bail out with ^C. */
while (isspace ((int) *p))
p++;
tmp_p = p;
for (loc = t->base.loc; loc; loc = loc->next)
{
p = tmp_p;
/* Only expressions are allowed for this action. */
exp = parse_exp_1 (&p, loc->address,
block_for_pc (loc->address), 1);
old_chain = make_cleanup (free_current_contents, &exp);
/* We have something to evaluate, make sure that the expr to
bytecode translator can handle it and that it's not too
long. */
aexpr = gen_eval_for_expr (loc->address, exp);
make_cleanup_free_agent_expr (aexpr);
if (aexpr->len > MAX_AGENT_EXPR_LEN)
error (_("Expression is too complicated."));
ax_reqs (aexpr);
report_agent_reqs_errors (aexpr);
do_cleanups (old_chain);
}
}
while (p && *p++ == ',');
}
else if (cmd_cfunc_eq (c, while_stepping_pseudocommand))
{
char *steparg; /* In case warning is necessary. */
while (isspace ((int) *p))
p++;
steparg = p;
if (*p == '\0' || (t->step_count = strtol (p, &p, 0)) == 0)
error (_("while-stepping step count `%s' is malformed."), *line);
}
else if (cmd_cfunc_eq (c, end_actions_pseudocommand))
;
else
error (_("`%s' is not a supported tracepoint action."), *line);
}
enum {
memrange_absolute = -1
};
struct memrange
{
int type; /* memrange_absolute for absolute memory range,
else basereg number. */
bfd_signed_vma start;
bfd_signed_vma end;
};
struct collection_list
{
unsigned char regs_mask[32]; /* room for up to 256 regs */
long listsize;
long next_memrange;
struct memrange *list;
long aexpr_listsize; /* size of array pointed to by expr_list elt */
long next_aexpr_elt;
struct agent_expr **aexpr_list;
/* True is the user requested a collection of "$_sdata", "static
tracepoint data". */
int strace_data;
}
tracepoint_list, stepping_list;
/* MEMRANGE functions: */
static int memrange_cmp (const void *, const void *);
/* Compare memranges for qsort. */
static int
memrange_cmp (const void *va, const void *vb)
{
const struct memrange *a = va, *b = vb;
if (a->type < b->type)
return -1;
if (a->type > b->type)
return 1;
if (a->type == memrange_absolute)
{
if ((bfd_vma) a->start < (bfd_vma) b->start)
return -1;
if ((bfd_vma) a->start > (bfd_vma) b->start)
return 1;
}
else
{
if (a->start < b->start)
return -1;
if (a->start > b->start)
return 1;
}
return 0;
}
/* Sort the memrange list using qsort, and merge adjacent memranges. */
static void
memrange_sortmerge (struct collection_list *memranges)
{
int a, b;
qsort (memranges->list, memranges->next_memrange,
sizeof (struct memrange), memrange_cmp);
if (memranges->next_memrange > 0)
{
for (a = 0, b = 1; b < memranges->next_memrange; b++)
{
/* If memrange b overlaps or is adjacent to memrange a,
merge them. */
if (memranges->list[a].type == memranges->list[b].type
&& memranges->list[b].start <= memranges->list[a].end)
{
if (memranges->list[b].end > memranges->list[a].end)
memranges->list[a].end = memranges->list[b].end;
continue; /* next b, same a */
}
a++; /* next a */
if (a != b)
memcpy (&memranges->list[a], &memranges->list[b],
sizeof (struct memrange));
}
memranges->next_memrange = a + 1;
}
}
/* Add a register to a collection list. */
static void
add_register (struct collection_list *collection, unsigned int regno)
{
if (info_verbose)
printf_filtered ("collect register %d\n", regno);
if (regno >= (8 * sizeof (collection->regs_mask)))
error (_("Internal: register number %d too large for tracepoint"),
regno);
collection->regs_mask[regno / 8] |= 1 << (regno % 8);
}
/* Add a memrange to a collection list. */
static void
add_memrange (struct collection_list *memranges,
int type, bfd_signed_vma base,
unsigned long len)
{
if (info_verbose)
{
printf_filtered ("(%d,", type);
printf_vma (base);
printf_filtered (",%ld)\n", len);
}
/* type: memrange_absolute == memory, other n == basereg */
memranges->list[memranges->next_memrange].type = type;
/* base: addr if memory, offset if reg relative. */
memranges->list[memranges->next_memrange].start = base;
/* len: we actually save end (base + len) for convenience */
memranges->list[memranges->next_memrange].end = base + len;
memranges->next_memrange++;
if (memranges->next_memrange >= memranges->listsize)
{
memranges->listsize *= 2;
memranges->list = xrealloc (memranges->list,
memranges->listsize);
}
if (type != memrange_absolute) /* Better collect the base register! */
add_register (memranges, type);
}
/* Add a symbol to a collection list. */
static void
collect_symbol (struct collection_list *collect,
struct symbol *sym,
struct gdbarch *gdbarch,
long frame_regno, long frame_offset,
CORE_ADDR scope)
{
unsigned long len;
unsigned int reg;
bfd_signed_vma offset;
int treat_as_expr = 0;
len = TYPE_LENGTH (check_typedef (SYMBOL_TYPE (sym)));
switch (SYMBOL_CLASS (sym))
{
default:
printf_filtered ("%s: don't know symbol class %d\n",
SYMBOL_PRINT_NAME (sym),
SYMBOL_CLASS (sym));
break;
case LOC_CONST:
printf_filtered ("constant %s (value %s) will not be collected.\n",
SYMBOL_PRINT_NAME (sym), plongest (SYMBOL_VALUE (sym)));
break;
case LOC_STATIC:
offset = SYMBOL_VALUE_ADDRESS (sym);
if (info_verbose)
{
char tmp[40];
sprintf_vma (tmp, offset);
printf_filtered ("LOC_STATIC %s: collect %ld bytes at %s.\n",
SYMBOL_PRINT_NAME (sym), len,
tmp /* address */);
}
/* A struct may be a C++ class with static fields, go to general
expression handling. */
if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_STRUCT)
treat_as_expr = 1;
else
add_memrange (collect, memrange_absolute, offset, len);
break;
case LOC_REGISTER:
reg = SYMBOL_REGISTER_OPS (sym)->register_number (sym, gdbarch);
if (info_verbose)
printf_filtered ("LOC_REG[parm] %s: ",
SYMBOL_PRINT_NAME (sym));
add_register (collect, reg);
/* Check for doubles stored in two registers. */
/* FIXME: how about larger types stored in 3 or more regs? */
if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_FLT &&
len > register_size (gdbarch, reg))
add_register (collect, reg + 1);
break;
case LOC_REF_ARG:
printf_filtered ("Sorry, don't know how to do LOC_REF_ARG yet.\n");
printf_filtered (" (will not collect %s)\n",
SYMBOL_PRINT_NAME (sym));
break;
case LOC_ARG:
reg = frame_regno;
offset = frame_offset + SYMBOL_VALUE (sym);
if (info_verbose)
{
printf_filtered ("LOC_LOCAL %s: Collect %ld bytes at offset ",
SYMBOL_PRINT_NAME (sym), len);
printf_vma (offset);
printf_filtered (" from frame ptr reg %d\n", reg);
}
add_memrange (collect, reg, offset, len);
break;
case LOC_REGPARM_ADDR:
reg = SYMBOL_VALUE (sym);
offset = 0;
if (info_verbose)
{
printf_filtered ("LOC_REGPARM_ADDR %s: Collect %ld bytes at offset ",
SYMBOL_PRINT_NAME (sym), len);
printf_vma (offset);
printf_filtered (" from reg %d\n", reg);
}
add_memrange (collect, reg, offset, len);
break;
case LOC_LOCAL:
reg = frame_regno;
offset = frame_offset + SYMBOL_VALUE (sym);
if (info_verbose)
{
printf_filtered ("LOC_LOCAL %s: Collect %ld bytes at offset ",
SYMBOL_PRINT_NAME (sym), len);
printf_vma (offset);
printf_filtered (" from frame ptr reg %d\n", reg);
}
add_memrange (collect, reg, offset, len);
break;
case LOC_UNRESOLVED:
treat_as_expr = 1;
break;
case LOC_OPTIMIZED_OUT:
printf_filtered ("%s has been optimized out of existence.\n",
SYMBOL_PRINT_NAME (sym));
break;
case LOC_COMPUTED:
treat_as_expr = 1;
break;
}
/* Expressions are the most general case. */
if (treat_as_expr)
{
struct agent_expr *aexpr;
struct cleanup *old_chain1 = NULL;
aexpr = gen_trace_for_var (scope, gdbarch, sym);
/* It can happen that the symbol is recorded as a computed
location, but it's been optimized away and doesn't actually
have a location expression. */
if (!aexpr)
{
printf_filtered ("%s has been optimized out of existence.\n",
SYMBOL_PRINT_NAME (sym));
return;
}
old_chain1 = make_cleanup_free_agent_expr (aexpr);
ax_reqs (aexpr);
report_agent_reqs_errors (aexpr);
discard_cleanups (old_chain1);
add_aexpr (collect, aexpr);
/* Take care of the registers. */
if (aexpr->reg_mask_len > 0)
{
int ndx1, ndx2;
for (ndx1 = 0; ndx1 < aexpr->reg_mask_len; ndx1++)
{
QUIT; /* Allow user to bail out with ^C. */
if (aexpr->reg_mask[ndx1] != 0)
{
/* Assume chars have 8 bits. */
for (ndx2 = 0; ndx2 < 8; ndx2++)
if (aexpr->reg_mask[ndx1] & (1 << ndx2))
/* It's used -- record it. */
add_register (collect, ndx1 * 8 + ndx2);
}
}
}
}
}
/* Data to be passed around in the calls to the locals and args
iterators. */
struct add_local_symbols_data
{
struct collection_list *collect;
struct gdbarch *gdbarch;
CORE_ADDR pc;
long frame_regno;
long frame_offset;
int count;
};
/* The callback for the locals and args iterators. */
static void
do_collect_symbol (const char *print_name,
struct symbol *sym,
void *cb_data)
{
struct add_local_symbols_data *p = cb_data;
collect_symbol (p->collect, sym, p->gdbarch, p->frame_regno,
p->frame_offset, p->pc);
p->count++;
}
/* Add all locals (or args) symbols to collection list. */
static void
add_local_symbols (struct collection_list *collect,
struct gdbarch *gdbarch, CORE_ADDR pc,
long frame_regno, long frame_offset, int type)
{
struct block *block;
struct add_local_symbols_data cb_data;
cb_data.collect = collect;
cb_data.gdbarch = gdbarch;
cb_data.pc = pc;
cb_data.frame_regno = frame_regno;
cb_data.frame_offset = frame_offset;
cb_data.count = 0;
if (type == 'L')
{
block = block_for_pc (pc);
if (block == NULL)
{
warning (_("Can't collect locals; "
"no symbol table info available.\n"));
return;
}
iterate_over_block_local_vars (block, do_collect_symbol, &cb_data);
if (cb_data.count == 0)
warning (_("No locals found in scope."));
}
else
{
pc = get_pc_function_start (pc);
block = block_for_pc (pc);
if (block == NULL)
{
warning (_("Can't collect args; no symbol table info available."));
return;
}
iterate_over_block_arg_vars (block, do_collect_symbol, &cb_data);
if (cb_data.count == 0)
warning (_("No args found in scope."));
}
}
static void
add_static_trace_data (struct collection_list *collection)
{
if (info_verbose)
printf_filtered ("collect static trace data\n");
collection->strace_data = 1;
}
/* worker function */
static void
clear_collection_list (struct collection_list *list)
{
int ndx;
list->next_memrange = 0;
for (ndx = 0; ndx < list->next_aexpr_elt; ndx++)
{
free_agent_expr (list->aexpr_list[ndx]);
list->aexpr_list[ndx] = NULL;
}
list->next_aexpr_elt = 0;
memset (list->regs_mask, 0, sizeof (list->regs_mask));
list->strace_data = 0;
}
/* Reduce a collection list to string form (for gdb protocol). */
static char **
stringify_collection_list (struct collection_list *list, char *string)
{
char temp_buf[2048];
char tmp2[40];
int count;
int ndx = 0;
char *(*str_list)[];
char *end;
long i;
count = 1 + 1 + list->next_memrange + list->next_aexpr_elt + 1;
str_list = (char *(*)[]) xmalloc (count * sizeof (char *));
if (list->strace_data)
{
if (info_verbose)
printf_filtered ("\nCollecting static trace data\n");
end = temp_buf;
*end++ = 'L';
(*str_list)[ndx] = savestring (temp_buf, end - temp_buf);
ndx++;
}
for (i = sizeof (list->regs_mask) - 1; i > 0; i--)
if (list->regs_mask[i] != 0) /* Skip leading zeroes in regs_mask. */
break;
if (list->regs_mask[i] != 0) /* Prepare to send regs_mask to the stub. */
{
if (info_verbose)
printf_filtered ("\nCollecting registers (mask): 0x");
end = temp_buf;
*end++ = 'R';
for (; i >= 0; i--)
{
QUIT; /* Allow user to bail out with ^C. */
if (info_verbose)
printf_filtered ("%02X", list->regs_mask[i]);
sprintf (end, "%02X", list->regs_mask[i]);
end += 2;
}
(*str_list)[ndx] = xstrdup (temp_buf);
ndx++;
}
if (info_verbose)
printf_filtered ("\n");
if (list->next_memrange > 0 && info_verbose)
printf_filtered ("Collecting memranges: \n");
for (i = 0, count = 0, end = temp_buf; i < list->next_memrange; i++)
{
QUIT; /* Allow user to bail out with ^C. */
sprintf_vma (tmp2, list->list[i].start);
if (info_verbose)
{
printf_filtered ("(%d, %s, %ld)\n",
list->list[i].type,
tmp2,
(long) (list->list[i].end - list->list[i].start));
}
if (count + 27 > MAX_AGENT_EXPR_LEN)
{
(*str_list)[ndx] = savestring (temp_buf, count);
ndx++;
count = 0;
end = temp_buf;
}
{
bfd_signed_vma length = list->list[i].end - list->list[i].start;
/* The "%X" conversion specifier expects an unsigned argument,
so passing -1 (memrange_absolute) to it directly gives you
"FFFFFFFF" (or more, depending on sizeof (unsigned)).
Special-case it. */
if (list->list[i].type == memrange_absolute)
sprintf (end, "M-1,%s,%lX", tmp2, (long) length);
else
sprintf (end, "M%X,%s,%lX", list->list[i].type, tmp2, (long) length);
}
count += strlen (end);
end = temp_buf + count;
}
for (i = 0; i < list->next_aexpr_elt; i++)
{
QUIT; /* Allow user to bail out with ^C. */
if ((count + 10 + 2 * list->aexpr_list[i]->len) > MAX_AGENT_EXPR_LEN)
{
(*str_list)[ndx] = savestring (temp_buf, count);
ndx++;
count = 0;
end = temp_buf;
}
sprintf (end, "X%08X,", list->aexpr_list[i]->len);
end += 10; /* 'X' + 8 hex digits + ',' */
count += 10;
end = mem2hex (list->aexpr_list[i]->buf,
end, list->aexpr_list[i]->len);
count += 2 * list->aexpr_list[i]->len;
}
if (count != 0)
{
(*str_list)[ndx] = savestring (temp_buf, count);
ndx++;
count = 0;
end = temp_buf;
}
(*str_list)[ndx] = NULL;
if (ndx == 0)
{
xfree (str_list);
return NULL;
}
else
return *str_list;
}
static void
encode_actions_1 (struct command_line *action,
struct breakpoint *t,
struct bp_location *tloc,
int frame_reg,
LONGEST frame_offset,
struct collection_list *collect,
struct collection_list *stepping_list)
{
char *action_exp;
struct expression *exp = NULL;
int i;
struct value *tempval;
struct cmd_list_element *cmd;
struct agent_expr *aexpr;
for (; action; action = action->next)
{
QUIT; /* Allow user to bail out with ^C. */
action_exp = action->line;
while (isspace ((int) *action_exp))
action_exp++;
cmd = lookup_cmd (&action_exp, cmdlist, "", -1, 1);
if (cmd == 0)
error (_("Bad action list item: %s"), action_exp);
if (cmd_cfunc_eq (cmd, collect_pseudocommand))
{
trace_string_kludge = 0;
if (*action_exp == '/')
action_exp = decode_agent_options (action_exp);
do
{ /* Repeat over a comma-separated list. */
QUIT; /* Allow user to bail out with ^C. */
while (isspace ((int) *action_exp))
action_exp++;
if (0 == strncasecmp ("$reg", action_exp, 4))
{
for (i = 0; i < gdbarch_num_regs (tloc->gdbarch); i++)
add_register (collect, i);
action_exp = strchr (action_exp, ','); /* more? */
}
else if (0 == strncasecmp ("$arg", action_exp, 4))
{
add_local_symbols (collect,
tloc->gdbarch,
tloc->address,
frame_reg,
frame_offset,
'A');
action_exp = strchr (action_exp, ','); /* more? */
}
else if (0 == strncasecmp ("$loc", action_exp, 4))
{
add_local_symbols (collect,
tloc->gdbarch,
tloc->address,
frame_reg,
frame_offset,
'L');
action_exp = strchr (action_exp, ','); /* more? */
}
else if (0 == strncasecmp ("$_ret", action_exp, 5))
{
struct cleanup *old_chain1 = NULL;
aexpr = gen_trace_for_return_address (tloc->address,
tloc->gdbarch);
old_chain1 = make_cleanup_free_agent_expr (aexpr);
ax_reqs (aexpr);
report_agent_reqs_errors (aexpr);
discard_cleanups (old_chain1);
add_aexpr (collect, aexpr);
/* take care of the registers */
if (aexpr->reg_mask_len > 0)
{
int ndx1, ndx2;
for (ndx1 = 0; ndx1 < aexpr->reg_mask_len; ndx1++)
{
QUIT; /* allow user to bail out with ^C */
if (aexpr->reg_mask[ndx1] != 0)
{
/* assume chars have 8 bits */
for (ndx2 = 0; ndx2 < 8; ndx2++)
if (aexpr->reg_mask[ndx1] & (1 << ndx2))
/* it's used -- record it */
add_register (collect,
ndx1 * 8 + ndx2);
}
}
}
action_exp = strchr (action_exp, ','); /* more? */
}
else if (0 == strncasecmp ("$_sdata", action_exp, 7))
{
add_static_trace_data (collect);
action_exp = strchr (action_exp, ','); /* more? */
}
else
{
unsigned long addr, len;
struct cleanup *old_chain = NULL;
struct cleanup *old_chain1 = NULL;
exp = parse_exp_1 (&action_exp, tloc->address,
block_for_pc (tloc->address), 1);
old_chain = make_cleanup (free_current_contents, &exp);
switch (exp->elts[0].opcode)
{
case OP_REGISTER:
{
const char *name = &exp->elts[2].string;
i = user_reg_map_name_to_regnum (tloc->gdbarch,
name, strlen (name));
if (i == -1)
internal_error (__FILE__, __LINE__,
_("Register $%s not available"),
name);
if (info_verbose)
printf_filtered ("OP_REGISTER: ");
add_register (collect, i);
break;
}
case UNOP_MEMVAL:
/* Safe because we know it's a simple expression. */
tempval = evaluate_expression (exp);
addr = value_address (tempval);
len = TYPE_LENGTH (check_typedef (exp->elts[1].type));
add_memrange (collect, memrange_absolute, addr, len);
break;
case OP_VAR_VALUE:
collect_symbol (collect,
exp->elts[2].symbol,
tloc->gdbarch,
frame_reg,
frame_offset,
tloc->address);
break;
default: /* Full-fledged expression. */
aexpr = gen_trace_for_expr (tloc->address, exp);
old_chain1 = make_cleanup_free_agent_expr (aexpr);
ax_reqs (aexpr);
report_agent_reqs_errors (aexpr);
discard_cleanups (old_chain1);
add_aexpr (collect, aexpr);
/* Take care of the registers. */
if (aexpr->reg_mask_len > 0)
{
int ndx1;
int ndx2;
for (ndx1 = 0; ndx1 < aexpr->reg_mask_len; ndx1++)
{
QUIT; /* Allow user to bail out with ^C. */
if (aexpr->reg_mask[ndx1] != 0)
{
/* Assume chars have 8 bits. */
for (ndx2 = 0; ndx2 < 8; ndx2++)
if (aexpr->reg_mask[ndx1] & (1 << ndx2))
/* It's used -- record it. */
add_register (collect,
ndx1 * 8 + ndx2);
}
}
}
break;
} /* switch */
do_cleanups (old_chain);
} /* do */
}
while (action_exp && *action_exp++ == ',');
} /* if */
else if (cmd_cfunc_eq (cmd, teval_pseudocommand))
{
do
{ /* Repeat over a comma-separated list. */
QUIT; /* Allow user to bail out with ^C. */
while (isspace ((int) *action_exp))
action_exp++;
{
struct cleanup *old_chain = NULL;
struct cleanup *old_chain1 = NULL;
exp = parse_exp_1 (&action_exp, tloc->address,
block_for_pc (tloc->address), 1);
old_chain = make_cleanup (free_current_contents, &exp);
aexpr = gen_eval_for_expr (tloc->address, exp);
old_chain1 = make_cleanup_free_agent_expr (aexpr);
ax_reqs (aexpr);
report_agent_reqs_errors (aexpr);
discard_cleanups (old_chain1);
/* Even though we're not officially collecting, add
to the collect list anyway. */
add_aexpr (collect, aexpr);
do_cleanups (old_chain);
} /* do */
}
while (action_exp && *action_exp++ == ',');
} /* if */
else if (cmd_cfunc_eq (cmd, while_stepping_pseudocommand))
{
/* We check against nested while-stepping when setting
breakpoint action, so no way to run into nested
here. */
gdb_assert (stepping_list);
encode_actions_1 (action->body_list[0], t, tloc, frame_reg,
frame_offset, stepping_list, NULL);
}
else
error (_("Invalid tracepoint command '%s'"), action->line);
} /* for */
}
/* Render all actions into gdb protocol. */
void
encode_actions (struct breakpoint *t, struct bp_location *tloc,
char ***tdp_actions, char ***stepping_actions)
{
static char tdp_buff[2048], step_buff[2048];
char *default_collect_line = NULL;
struct command_line *actions;
struct command_line *default_collect_action = NULL;
int frame_reg;
LONGEST frame_offset;
struct cleanup *back_to;
back_to = make_cleanup (null_cleanup, NULL);
clear_collection_list (&tracepoint_list);
clear_collection_list (&stepping_list);
*tdp_actions = NULL;
*stepping_actions = NULL;
gdbarch_virtual_frame_pointer (tloc->gdbarch,
tloc->address, &frame_reg, &frame_offset);
actions = breakpoint_commands (t);
/* If there are default expressions to collect, make up a collect
action and prepend to the action list to encode. Note that since
validation is per-tracepoint (local var "xyz" might be valid for
one tracepoint and not another, etc), we make up the action on
the fly, and don't cache it. */
if (*default_collect)
{
char *line;
default_collect_line = xstrprintf ("collect %s", default_collect);
make_cleanup (xfree, default_collect_line);
line = default_collect_line;
validate_actionline (&line, t);
default_collect_action = xmalloc (sizeof (struct command_line));
make_cleanup (xfree, default_collect_action);
default_collect_action->next = actions;
default_collect_action->line = line;
actions = default_collect_action;
}
encode_actions_1 (actions, t, tloc, frame_reg, frame_offset,
&tracepoint_list, &stepping_list);
memrange_sortmerge (&tracepoint_list);
memrange_sortmerge (&stepping_list);
*tdp_actions = stringify_collection_list (&tracepoint_list,
tdp_buff);
*stepping_actions = stringify_collection_list (&stepping_list,
step_buff);
do_cleanups (back_to);
}
static void
add_aexpr (struct collection_list *collect, struct agent_expr *aexpr)
{
if (collect->next_aexpr_elt >= collect->aexpr_listsize)
{
collect->aexpr_list =
xrealloc (collect->aexpr_list,
2 * collect->aexpr_listsize * sizeof (struct agent_expr *));
collect->aexpr_listsize *= 2;
}
collect->aexpr_list[collect->next_aexpr_elt] = aexpr;
collect->next_aexpr_elt++;
}
static void
process_tracepoint_on_disconnect (void)
{
VEC(breakpoint_p) *tp_vec = NULL;
int ix;
struct breakpoint *b;
int has_pending_p = 0;
/* Check whether we still have pending tracepoint. If we have, warn the
user that pending tracepoint will no longer work. */
tp_vec = all_tracepoints ();
for (ix = 0; VEC_iterate (breakpoint_p, tp_vec, ix, b); ix++)
{
if (b->loc == NULL)
{
has_pending_p = 1;
break;
}
else
{
struct bp_location *loc1;
for (loc1 = b->loc; loc1; loc1 = loc1->next)
{
if (loc1->shlib_disabled)
{
has_pending_p = 1;
break;
}
}
if (has_pending_p)
break;
}
}
VEC_free (breakpoint_p, tp_vec);
if (has_pending_p)
warning (_("Pending tracepoints will not be resolved while"
" GDB is disconnected\n"));
}
void
start_tracing (char *notes)
{
VEC(breakpoint_p) *tp_vec = NULL;
int ix;
struct breakpoint *b;
struct trace_state_variable *tsv;
int any_enabled = 0, num_to_download = 0;
int ret;
tp_vec = all_tracepoints ();
/* No point in tracing without any tracepoints... */
if (VEC_length (breakpoint_p, tp_vec) == 0)
{
VEC_free (breakpoint_p, tp_vec);
error (_("No tracepoints defined, not starting trace"));
}
for (ix = 0; VEC_iterate (breakpoint_p, tp_vec, ix, b); ix++)
{
struct tracepoint *t = (struct tracepoint *) b;
struct bp_location *loc;
if (b->enable_state == bp_enabled)
any_enabled = 1;
if ((b->type == bp_fast_tracepoint
? may_insert_fast_tracepoints
: may_insert_tracepoints))
++num_to_download;
else
warning (_("May not insert %stracepoints, skipping tracepoint %d"),
(b->type == bp_fast_tracepoint ? "fast " : ""), b->number);
}
if (!any_enabled)
{
if (target_supports_enable_disable_tracepoint ())
warning (_("No tracepoints enabled"));
else
{
/* No point in tracing with only disabled tracepoints that
cannot be re-enabled. */
VEC_free (breakpoint_p, tp_vec);
error (_("No tracepoints enabled, not starting trace"));
}
}
if (num_to_download <= 0)
{
VEC_free (breakpoint_p, tp_vec);
error (_("No tracepoints that may be downloaded, not starting trace"));
}
target_trace_init ();
for (ix = 0; VEC_iterate (breakpoint_p, tp_vec, ix, b); ix++)
{
struct tracepoint *t = (struct tracepoint *) b;
struct bp_location *loc;
/* Clear `inserted' flag. */
for (loc = b->loc; loc; loc = loc->next)
loc->inserted = 0;
if ((b->type == bp_fast_tracepoint
? !may_insert_fast_tracepoints
: !may_insert_tracepoints))
continue;
t->number_on_target = 0;
for (loc = b->loc; loc; loc = loc->next)
{
/* Since tracepoint locations are never duplicated, `inserted'
flag should be zero. */
gdb_assert (!loc->inserted);
target_download_tracepoint (loc);
loc->inserted = 1;
}
t->number_on_target = b->number;
for (loc = b->loc; loc; loc = loc->next)
if (loc->probe != NULL)
loc->probe->pops->set_semaphore (loc->probe, loc->gdbarch);
}
VEC_free (breakpoint_p, tp_vec);
/* Send down all the trace state variables too. */
for (ix = 0; VEC_iterate (tsv_s, tvariables, ix, tsv); ++ix)
{
target_download_trace_state_variable (tsv);
}
/* Tell target to treat text-like sections as transparent. */
target_trace_set_readonly_regions ();
/* Set some mode flags. */
target_set_disconnected_tracing (disconnected_tracing);
target_set_circular_trace_buffer (circular_trace_buffer);
if (!notes)
notes = trace_notes;
ret = target_set_trace_notes (trace_user, notes, NULL);
if (!ret && (trace_user || notes))
warning (_("Target does not support trace user/notes, info ignored"));
/* Now insert traps and begin collecting data. */
target_trace_start ();
/* Reset our local state. */
set_traceframe_num (-1);
set_tracepoint_num (-1);
set_traceframe_context (NULL);
current_trace_status()->running = 1;
clear_traceframe_info ();
}
/* The tstart command requests the target to start a new trace run.
The command passes any arguments it has to the target verbatim, as
an optional "trace note". This is useful as for instance a warning
to other users if the trace runs disconnected, and you don't want
anybody else messing with the target. */
static void
trace_start_command (char *args, int from_tty)
{
dont_repeat (); /* Like "run", dangerous to repeat accidentally. */
if (current_trace_status ()->running)
{
if (from_tty
&& !query (_("A trace is running already. Start a new run? ")))
error (_("New trace run not started."));
}
start_tracing (args);
}
/* The tstop command stops the tracing run. The command passes any
supplied arguments to the target verbatim as a "stop note"; if the
target supports trace notes, then it will be reported back as part
of the trace run's status. */
static void
trace_stop_command (char *args, int from_tty)
{
if (!current_trace_status ()->running)
error (_("Trace is not running."));
stop_tracing (args);
}
void
stop_tracing (char *note)
{
int ret;
VEC(breakpoint_p) *tp_vec = NULL;
int ix;
struct breakpoint *t;
target_trace_stop ();
tp_vec = all_tracepoints ();
for (ix = 0; VEC_iterate (breakpoint_p, tp_vec, ix, t); ix++)
{
struct bp_location *loc;
if ((t->type == bp_fast_tracepoint
? !may_insert_fast_tracepoints
: !may_insert_tracepoints))
continue;
for (loc = t->loc; loc; loc = loc->next)
{
/* GDB can be totally absent in some disconnected trace scenarios,
but we don't really care if this semaphore goes out of sync.
That's why we are decrementing it here, but not taking care
in other places. */
if (loc->probe != NULL)
loc->probe->pops->clear_semaphore (loc->probe, loc->gdbarch);
}
}
VEC_free (breakpoint_p, tp_vec);
if (!note)
note = trace_stop_notes;
ret = target_set_trace_notes (NULL, NULL, note);
if (!ret && note)
warning (_("Target does not support trace notes, note ignored"));
/* Should change in response to reply? */
current_trace_status ()->running = 0;
}
/* tstatus command */
static void
trace_status_command (char *args, int from_tty)
{
struct trace_status *ts = current_trace_status ();
int status, ix;
VEC(breakpoint_p) *tp_vec = NULL;
struct breakpoint *t;
status = target_get_trace_status (ts);
if (status == -1)
{
if (ts->from_file)
printf_filtered (_("Using a trace file.\n"));
else
{
printf_filtered (_("Trace can not be run on this target.\n"));
return;
}
}
if (!ts->running_known)
{
printf_filtered (_("Run/stop status is unknown.\n"));
}
else if (ts->running)
{
printf_filtered (_("Trace is running on the target.\n"));
}
else
{
switch (ts->stop_reason)
{
case trace_never_run:
printf_filtered (_("No trace has been run on the target.\n"));
break;
case tstop_command:
if (ts->stop_desc)
printf_filtered (_("Trace stopped by a tstop command (%s).\n"),
ts->stop_desc);
else
printf_filtered (_("Trace stopped by a tstop command.\n"));
break;
case trace_buffer_full:
printf_filtered (_("Trace stopped because the buffer was full.\n"));
break;
case trace_disconnected:
printf_filtered (_("Trace stopped because of disconnection.\n"));
break;
case tracepoint_passcount:
printf_filtered (_("Trace stopped by tracepoint %d.\n"),
ts->stopping_tracepoint);
break;
case tracepoint_error:
if (ts->stopping_tracepoint)
printf_filtered (_("Trace stopped by an "
"error (%s, tracepoint %d).\n"),
ts->stop_desc, ts->stopping_tracepoint);
else
printf_filtered (_("Trace stopped by an error (%s).\n"),
ts->stop_desc);
break;
case trace_stop_reason_unknown:
printf_filtered (_("Trace stopped for an unknown reason.\n"));
break;
default:
printf_filtered (_("Trace stopped for some other reason (%d).\n"),
ts->stop_reason);
break;
}
}
if (ts->traceframes_created >= 0
&& ts->traceframe_count != ts->traceframes_created)
{
printf_filtered (_("Buffer contains %d trace "
"frames (of %d created total).\n"),
ts->traceframe_count, ts->traceframes_created);
}
else if (ts->traceframe_count >= 0)
{
printf_filtered (_("Collected %d trace frames.\n"),
ts->traceframe_count);
}
if (ts->buffer_free >= 0)
{
if (ts->buffer_size >= 0)
{
printf_filtered (_("Trace buffer has %d bytes of %d bytes free"),
ts->buffer_free, ts->buffer_size);
if (ts->buffer_size > 0)
printf_filtered (_(" (%d%% full)"),
((int) ((((long long) (ts->buffer_size
- ts->buffer_free)) * 100)
/ ts->buffer_size)));
printf_filtered (_(".\n"));
}
else
printf_filtered (_("Trace buffer has %d bytes free.\n"),
ts->buffer_free);
}
if (ts->disconnected_tracing)
printf_filtered (_("Trace will continue if GDB disconnects.\n"));
else
printf_filtered (_("Trace will stop if GDB disconnects.\n"));
if (ts->circular_buffer)
printf_filtered (_("Trace buffer is circular.\n"));
if (ts->user_name && strlen (ts->user_name) > 0)
printf_filtered (_("Trace user is %s.\n"), ts->user_name);
if (ts->notes && strlen (ts->notes) > 0)
printf_filtered (_("Trace notes: %s.\n"), ts->notes);
/* Now report on what we're doing with tfind. */
if (traceframe_number >= 0)
printf_filtered (_("Looking at trace frame %d, tracepoint %d.\n"),
traceframe_number, tracepoint_number);
else
printf_filtered (_("Not looking at any trace frame.\n"));
/* Report start/stop times if supplied. */
if (ts->start_time)
{
if (ts->stop_time)
{
LONGEST run_time = ts->stop_time - ts->start_time;
/* Reporting a run time is more readable than two long numbers. */
printf_filtered (_("Trace started at %ld.%06ld secs, stopped %ld.%06ld secs later.\n"),
(long int) ts->start_time / 1000000,
(long int) ts->start_time % 1000000,
(long int) run_time / 1000000,
(long int) run_time % 1000000);
}
else
printf_filtered (_("Trace started at %ld.%06ld secs.\n"),
(long int) ts->start_time / 1000000,
(long int) ts->start_time % 1000000);
}
else if (ts->stop_time)
printf_filtered (_("Trace stopped at %ld.%06ld secs.\n"),
(long int) ts->stop_time / 1000000,
(long int) ts->stop_time % 1000000);
/* Now report any per-tracepoint status available. */
tp_vec = all_tracepoints ();
for (ix = 0; VEC_iterate (breakpoint_p, tp_vec, ix, t); ix++)
target_get_tracepoint_status (t, NULL);
VEC_free (breakpoint_p, tp_vec);
}
/* Report the trace status to uiout, in a way suitable for MI, and not
suitable for CLI. If ON_STOP is true, suppress a few fields that
are not meaningful in the -trace-stop response.
The implementation is essentially parallel to trace_status_command, but
merging them will result in unreadable code. */
void
trace_status_mi (int on_stop)
{
struct ui_out *uiout = current_uiout;
struct trace_status *ts = current_trace_status ();
int status;
status = target_get_trace_status (ts);
if (status == -1 && !ts->from_file)
{
ui_out_field_string (uiout, "supported", "0");
return;
}
if (ts->from_file)
ui_out_field_string (uiout, "supported", "file");
else if (!on_stop)
ui_out_field_string (uiout, "supported", "1");
gdb_assert (ts->running_known);
if (ts->running)
{
ui_out_field_string (uiout, "running", "1");
/* Unlike CLI, do not show the state of 'disconnected-tracing' variable.
Given that the frontend gets the status either on -trace-stop, or from
-trace-status after re-connection, it does not seem like this
information is necessary for anything. It is not necessary for either
figuring the vital state of the target nor for navigation of trace
frames. If the frontend wants to show the current state is some
configure dialog, it can request the value when such dialog is
invoked by the user. */
}
else
{
char *stop_reason = NULL;
int stopping_tracepoint = -1;
if (!on_stop)
ui_out_field_string (uiout, "running", "0");
if (ts->stop_reason != trace_stop_reason_unknown)
{
switch (ts->stop_reason)
{
case tstop_command:
stop_reason = "request";
break;
case trace_buffer_full:
stop_reason = "overflow";
break;
case trace_disconnected:
stop_reason = "disconnection";
break;
case tracepoint_passcount:
stop_reason = "passcount";
stopping_tracepoint = ts->stopping_tracepoint;
break;
case tracepoint_error:
stop_reason = "error";
stopping_tracepoint = ts->stopping_tracepoint;
break;
}
if (stop_reason)
{
ui_out_field_string (uiout, "stop-reason", stop_reason);
if (stopping_tracepoint != -1)
ui_out_field_int (uiout, "stopping-tracepoint",
stopping_tracepoint);
if (ts->stop_reason == tracepoint_error)
ui_out_field_string (uiout, "error-description",
ts->stop_desc);
}
}
}
if (ts->traceframe_count != -1)
ui_out_field_int (uiout, "frames", ts->traceframe_count);
if (ts->traceframes_created != -1)
ui_out_field_int (uiout, "frames-created", ts->traceframes_created);
if (ts->buffer_size != -1)
ui_out_field_int (uiout, "buffer-size", ts->buffer_size);
if (ts->buffer_free != -1)
ui_out_field_int (uiout, "buffer-free", ts->buffer_free);
ui_out_field_int (uiout, "disconnected", ts->disconnected_tracing);
ui_out_field_int (uiout, "circular", ts->circular_buffer);
ui_out_field_string (uiout, "user-name", ts->user_name);
ui_out_field_string (uiout, "notes", ts->notes);
{
char buf[100];
xsnprintf (buf, sizeof buf, "%ld.%06ld",
(long int) ts->start_time / 1000000,
(long int) ts->start_time % 1000000);
ui_out_field_string (uiout, "start-time", buf);
xsnprintf (buf, sizeof buf, "%ld.%06ld",
(long int) ts->stop_time / 1000000,
(long int) ts->stop_time % 1000000);
ui_out_field_string (uiout, "stop-time", buf);
}
}
/* This function handles the details of what to do about an ongoing
tracing run if the user has asked to detach or otherwise disconnect
from the target. */
void
disconnect_tracing (int from_tty)
{
/* It can happen that the target that was tracing went away on its
own, and we didn't notice. Get a status update, and if the
current target doesn't even do tracing, then assume it's not
running anymore. */
if (target_get_trace_status (current_trace_status ()) < 0)
current_trace_status ()->running = 0;
/* If running interactively, give the user the option to cancel and
then decide what to do differently with the run. Scripts are
just going to disconnect and let the target deal with it,
according to how it's been instructed previously via
disconnected-tracing. */
if (current_trace_status ()->running && from_tty)
{
process_tracepoint_on_disconnect ();
if (current_trace_status ()->disconnected_tracing)
{
if (!query (_("Trace is running and will "
"continue after detach; detach anyway? ")))
error (_("Not confirmed."));
}
else
{
if (!query (_("Trace is running but will "
"stop on detach; detach anyway? ")))
error (_("Not confirmed."));
}
}
/* Also we want to be out of tfind mode, otherwise things can get
confusing upon reconnection. Just use these calls instead of
full tfind_1 behavior because we're in the middle of detaching,
and there's no point to updating current stack frame etc. */
set_current_traceframe (-1);
set_traceframe_context (NULL);
}
/* Worker function for the various flavors of the tfind command. */
void
tfind_1 (enum trace_find_type type, int num,
ULONGEST addr1, ULONGEST addr2,
int from_tty)
{
int target_frameno = -1, target_tracept = -1;
struct frame_id old_frame_id = null_frame_id;
struct tracepoint *tp;
struct ui_out *uiout = current_uiout;
/* Only try to get the current stack frame if we have a chance of
succeeding. In particular, if we're trying to get a first trace
frame while all threads are running, it's not going to succeed,
so leave it with a default value and let the frame comparison
below (correctly) decide to print out the source location of the
trace frame. */
if (!(type == tfind_number && num == -1)
&& (has_stack_frames () || traceframe_number >= 0))
old_frame_id = get_frame_id (get_current_frame ());
target_frameno = target_trace_find (type, num, addr1, addr2,
&target_tracept);
if (type == tfind_number
&& num == -1
&& target_frameno == -1)
{
/* We told the target to get out of tfind mode, and it did. */
}
else if (target_frameno == -1)
{
/* A request for a non-existent trace frame has failed.
Our response will be different, depending on FROM_TTY:
If FROM_TTY is true, meaning that this command was
typed interactively by the user, then give an error
and DO NOT change the state of traceframe_number etc.
However if FROM_TTY is false, meaning that we're either
in a script, a loop, or a user-defined command, then
DON'T give an error, but DO change the state of
traceframe_number etc. to invalid.
The rationalle is that if you typed the command, you
might just have committed a typo or something, and you'd
like to NOT lose your current debugging state. However
if you're in a user-defined command or especially in a
loop, then you need a way to detect that the command
failed WITHOUT aborting. This allows you to write
scripts that search thru the trace buffer until the end,
and then continue on to do something else. */
if (from_tty)
error (_("Target failed to find requested trace frame."));
else
{
if (info_verbose)
printf_filtered ("End of trace buffer.\n");
#if 0 /* dubious now? */
/* The following will not recurse, since it's
special-cased. */
trace_find_command ("-1", from_tty);
#endif
}
}
tp = get_tracepoint_by_number_on_target (target_tracept);
reinit_frame_cache ();
registers_changed ();
target_dcache_invalidate ();
set_traceframe_num (target_frameno);
clear_traceframe_info ();
set_tracepoint_num (tp ? tp->base.number : target_tracept);
if (target_frameno == -1)
set_traceframe_context (NULL);
else
set_traceframe_context (get_current_frame ());
if (traceframe_number >= 0)
{
/* Use different branches for MI and CLI to make CLI messages
i18n-eable. */
if (ui_out_is_mi_like_p (uiout))
{
ui_out_field_string (uiout, "found", "1");
ui_out_field_int (uiout, "tracepoint", tracepoint_number);
ui_out_field_int (uiout, "traceframe", traceframe_number);
}
else
{
printf_unfiltered (_("Found trace frame %d, tracepoint %d\n"),
traceframe_number, tracepoint_number);
}
}
else
{
if (ui_out_is_mi_like_p (uiout))
ui_out_field_string (uiout, "found", "0");
else if (type == tfind_number && num == -1)
printf_unfiltered (_("No longer looking at any trace frame\n"));
else /* This case may never occur, check. */
printf_unfiltered (_("No trace frame found\n"));
}
/* If we're in nonstop mode and getting out of looking at trace
frames, there won't be any current frame to go back to and
display. */
if (from_tty
&& (has_stack_frames () || traceframe_number >= 0))
{
enum print_what print_what;
/* NOTE: in imitation of the step command, try to determine
whether we have made a transition from one function to
another. If so, we'll print the "stack frame" (ie. the new
function and it's arguments) -- otherwise we'll just show the
new source line. */
if (frame_id_eq (old_frame_id,
get_frame_id (get_current_frame ())))
print_what = SRC_LINE;
else
print_what = SRC_AND_LOC;
print_stack_frame (get_selected_frame (NULL), 1, print_what);
do_displays ();
}
}
/* trace_find_command takes a trace frame number n,
sends "QTFrame:<n>" to the target,
and accepts a reply that may contain several optional pieces
of information: a frame number, a tracepoint number, and an
indication of whether this is a trap frame or a stepping frame.
The minimal response is just "OK" (which indicates that the
target does not give us a frame number or a tracepoint number).
Instead of that, the target may send us a string containing
any combination of:
F<hexnum> (gives the selected frame number)
T<hexnum> (gives the selected tracepoint number)
*/
/* tfind command */
static void
trace_find_command (char *args, int from_tty)
{ /* This should only be called with a numeric argument. */
int frameno = -1;
if (current_trace_status ()->running && !current_trace_status ()->from_file)
error (_("May not look at trace frames while trace is running."));
if (args == 0 || *args == 0)
{ /* TFIND with no args means find NEXT trace frame. */
if (traceframe_number == -1)
frameno = 0; /* "next" is first one. */
else
frameno = traceframe_number + 1;
}
else if (0 == strcmp (args, "-"))
{
if (traceframe_number == -1)
error (_("not debugging trace buffer"));
else if (from_tty && traceframe_number == 0)
error (_("already at start of trace buffer"));
frameno = traceframe_number - 1;
}
/* A hack to work around eval's need for fp to have been collected. */
else if (0 == strcmp (args, "-1"))
frameno = -1;
else
frameno = parse_and_eval_long (args);
if (frameno < -1)
error (_("invalid input (%d is less than zero)"), frameno);
tfind_1 (tfind_number, frameno, 0, 0, from_tty);
}
/* tfind end */
static void
trace_find_end_command (char *args, int from_tty)
{
trace_find_command ("-1", from_tty);
}
/* tfind none */
static void
trace_find_none_command (char *args, int from_tty)
{
trace_find_command ("-1", from_tty);
}
/* tfind start */
static void
trace_find_start_command (char *args, int from_tty)
{
trace_find_command ("0", from_tty);
}
/* tfind pc command */
static void
trace_find_pc_command (char *args, int from_tty)
{
CORE_ADDR pc;
if (current_trace_status ()->running && !current_trace_status ()->from_file)
error (_("May not look at trace frames while trace is running."));
if (args == 0 || *args == 0)
pc = regcache_read_pc (get_current_regcache ());
else
pc = parse_and_eval_address (args);
tfind_1 (tfind_pc, 0, pc, 0, from_tty);
}
/* tfind tracepoint command */
static void
trace_find_tracepoint_command (char *args, int from_tty)
{
int tdp;
struct tracepoint *tp;
if (current_trace_status ()->running && !current_trace_status ()->from_file)
error (_("May not look at trace frames while trace is running."));
if (args == 0 || *args == 0)
{
if (tracepoint_number == -1)
error (_("No current tracepoint -- please supply an argument."));
else
tdp = tracepoint_number; /* Default is current TDP. */
}
else
tdp = parse_and_eval_long (args);
/* If we have the tracepoint on hand, use the number that the
target knows about (which may be different if we disconnected
and reconnected). */
tp = get_tracepoint (tdp);
if (tp)
tdp = tp->number_on_target;
tfind_1 (tfind_tp, tdp, 0, 0, from_tty);
}
/* TFIND LINE command:
This command will take a sourceline for argument, just like BREAK
or TRACE (ie. anything that "decode_line_1" can handle).
With no argument, this command will find the next trace frame
corresponding to a source line OTHER THAN THE CURRENT ONE. */
static void
trace_find_line_command (char *args, int from_tty)
{
static CORE_ADDR start_pc, end_pc;
struct symtabs_and_lines sals;
struct symtab_and_line sal;
struct cleanup *old_chain;
if (current_trace_status ()->running && !current_trace_status ()->from_file)
error (_("May not look at trace frames while trace is running."));
if (args == 0 || *args == 0)
{
sal = find_pc_line (get_frame_pc (get_current_frame ()), 0);
sals.nelts = 1;
sals.sals = (struct symtab_and_line *)
xmalloc (sizeof (struct symtab_and_line));
sals.sals[0] = sal;
}
else
{
sals = decode_line_with_current_source (args, DECODE_LINE_FUNFIRSTLINE);
sal = sals.sals[0];
}
old_chain = make_cleanup (xfree, sals.sals);
if (sal.symtab == 0)
error (_("No line number information available."));
if (sal.line > 0 && find_line_pc_range (sal, &start_pc, &end_pc))
{
if (start_pc == end_pc)
{
printf_filtered ("Line %d of \"%s\"",
sal.line, sal.symtab->filename);
wrap_here (" ");
printf_filtered (" is at address ");
print_address (get_current_arch (), start_pc, gdb_stdout);
wrap_here (" ");
printf_filtered (" but contains no code.\n");
sal = find_pc_line (start_pc, 0);
if (sal.line > 0
&& find_line_pc_range (sal, &start_pc, &end_pc)
&& start_pc != end_pc)
printf_filtered ("Attempting to find line %d instead.\n",
sal.line);
else
error (_("Cannot find a good line."));
}
}
else
/* Is there any case in which we get here, and have an address
which the user would want to see? If we have debugging
symbols and no line numbers? */
error (_("Line number %d is out of range for \"%s\"."),
sal.line, sal.symtab->filename);
/* Find within range of stated line. */
if (args && *args)
tfind_1 (tfind_range, 0, start_pc, end_pc - 1, from_tty);
else
tfind_1 (tfind_outside, 0, start_pc, end_pc - 1, from_tty);
do_cleanups (old_chain);
}
/* tfind range command */
static void
trace_find_range_command (char *args, int from_tty)
{
static CORE_ADDR start, stop;
char *tmp;
if (current_trace_status ()->running && !current_trace_status ()->from_file)
error (_("May not look at trace frames while trace is running."));
if (args == 0 || *args == 0)
{ /* XXX FIXME: what should default behavior be? */
printf_filtered ("Usage: tfind range <startaddr>,<endaddr>\n");
return;
}
if (0 != (tmp = strchr (args, ',')))
{
*tmp++ = '\0'; /* Terminate start address. */
while (isspace ((int) *tmp))
tmp++;
start = parse_and_eval_address (args);
stop = parse_and_eval_address (tmp);
}
else
{ /* No explicit end address? */
start = parse_and_eval_address (args);
stop = start + 1; /* ??? */
}
tfind_1 (tfind_range, 0, start, stop, from_tty);
}
/* tfind outside command */
static void
trace_find_outside_command (char *args, int from_tty)
{
CORE_ADDR start, stop;
char *tmp;
if (current_trace_status ()->running && !current_trace_status ()->from_file)
error (_("May not look at trace frames while trace is running."));
if (args == 0 || *args == 0)
{ /* XXX FIXME: what should default behavior be? */
printf_filtered ("Usage: tfind outside <startaddr>,<endaddr>\n");
return;
}
if (0 != (tmp = strchr (args, ',')))
{
*tmp++ = '\0'; /* Terminate start address. */
while (isspace ((int) *tmp))
tmp++;
start = parse_and_eval_address (args);
stop = parse_and_eval_address (tmp);
}
else
{ /* No explicit end address? */
start = parse_and_eval_address (args);
stop = start + 1; /* ??? */
}
tfind_1 (tfind_outside, 0, start, stop, from_tty);
}
/* info scope command: list the locals for a scope. */
static void
scope_info (char *args, int from_tty)
{
struct symtabs_and_lines sals;
struct symbol *sym;
struct minimal_symbol *msym;
struct block *block;
const char *symname;
char *save_args = args;
struct block_iterator iter;
int j, count = 0;
struct gdbarch *gdbarch;
int regno;
if (args == 0 || *args == 0)
error (_("requires an argument (function, "
"line or *addr) to define a scope"));
sals = decode_line_1 (&args, DECODE_LINE_FUNFIRSTLINE, NULL, 0);
if (sals.nelts == 0)
return; /* Presumably decode_line_1 has already warned. */
/* Resolve line numbers to PC. */
resolve_sal_pc (&sals.sals[0]);
block = block_for_pc (sals.sals[0].pc);
while (block != 0)
{
QUIT; /* Allow user to bail out with ^C. */
ALL_BLOCK_SYMBOLS (block, iter, sym)
{
QUIT; /* Allow user to bail out with ^C. */
if (count == 0)
printf_filtered ("Scope for %s:\n", save_args);
count++;
symname = SYMBOL_PRINT_NAME (sym);
if (symname == NULL || *symname == '\0')
continue; /* Probably botched, certainly useless. */
gdbarch = get_objfile_arch (SYMBOL_SYMTAB (sym)->objfile);
printf_filtered ("Symbol %s is ", symname);
switch (SYMBOL_CLASS (sym))
{
default:
case LOC_UNDEF: /* Messed up symbol? */
printf_filtered ("a bogus symbol, class %d.\n",
SYMBOL_CLASS (sym));
count--; /* Don't count this one. */
continue;
case LOC_CONST:
printf_filtered ("a constant with value %s (%s)",
plongest (SYMBOL_VALUE (sym)),
hex_string (SYMBOL_VALUE (sym)));
break;
case LOC_CONST_BYTES:
printf_filtered ("constant bytes: ");
if (SYMBOL_TYPE (sym))
for (j = 0; j < TYPE_LENGTH (SYMBOL_TYPE (sym)); j++)
fprintf_filtered (gdb_stdout, " %02x",
(unsigned) SYMBOL_VALUE_BYTES (sym)[j]);
break;
case LOC_STATIC:
printf_filtered ("in static storage at address ");
printf_filtered ("%s", paddress (gdbarch,
SYMBOL_VALUE_ADDRESS (sym)));
break;
case LOC_REGISTER:
/* GDBARCH is the architecture associated with the objfile
the symbol is defined in; the target architecture may be
different, and may provide additional registers. However,
we do not know the target architecture at this point.
We assume the objfile architecture will contain all the
standard registers that occur in debug info in that
objfile. */
regno = SYMBOL_REGISTER_OPS (sym)->register_number (sym,
gdbarch);
if (SYMBOL_IS_ARGUMENT (sym))
printf_filtered ("an argument in register $%s",
gdbarch_register_name (gdbarch, regno));
else
printf_filtered ("a local variable in register $%s",
gdbarch_register_name (gdbarch, regno));
break;
case LOC_ARG:
printf_filtered ("an argument at stack/frame offset %s",
plongest (SYMBOL_VALUE (sym)));
break;
case LOC_LOCAL:
printf_filtered ("a local variable at frame offset %s",
plongest (SYMBOL_VALUE (sym)));
break;
case LOC_REF_ARG:
printf_filtered ("a reference argument at offset %s",
plongest (SYMBOL_VALUE (sym)));
break;
case LOC_REGPARM_ADDR:
/* Note comment at LOC_REGISTER. */
regno = SYMBOL_REGISTER_OPS (sym)->register_number (sym,
gdbarch);
printf_filtered ("the address of an argument, in register $%s",
gdbarch_register_name (gdbarch, regno));
break;
case LOC_TYPEDEF:
printf_filtered ("a typedef.\n");
continue;
case LOC_LABEL:
printf_filtered ("a label at address ");
printf_filtered ("%s", paddress (gdbarch,
SYMBOL_VALUE_ADDRESS (sym)));
break;
case LOC_BLOCK:
printf_filtered ("a function at address ");
printf_filtered ("%s",
paddress (gdbarch, BLOCK_START (SYMBOL_BLOCK_VALUE (sym))));
break;
case LOC_UNRESOLVED:
msym = lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym),
NULL, NULL);
if (msym == NULL)
printf_filtered ("Unresolved Static");
else
{
printf_filtered ("static storage at address ");
printf_filtered ("%s",
paddress (gdbarch, SYMBOL_VALUE_ADDRESS (msym)));
}
break;
case LOC_OPTIMIZED_OUT:
printf_filtered ("optimized out.\n");
continue;
case LOC_COMPUTED:
SYMBOL_COMPUTED_OPS (sym)->describe_location (sym,
BLOCK_START (block),
gdb_stdout);
break;
}
if (SYMBOL_TYPE (sym))
printf_filtered (", length %d.\n",
TYPE_LENGTH (check_typedef (SYMBOL_TYPE (sym))));
}
if (BLOCK_FUNCTION (block))
break;
else
block = BLOCK_SUPERBLOCK (block);
}
if (count <= 0)
printf_filtered ("Scope for %s contains no locals or arguments.\n",
save_args);
}
/* worker function (cleanup) */
static void
replace_comma (void *data)
{
char *comma = data;
*comma = ',';
}
/* Helper for trace_dump_command. Dump the action list starting at
ACTION. STEPPING_ACTIONS is true if we're iterating over the
actions of the body of a while-stepping action. STEPPING_FRAME is
set if the current traceframe was determined to be a while-stepping
traceframe. */
static void
trace_dump_actions (struct command_line *action,
int stepping_actions, int stepping_frame,
int from_tty)
{
char *action_exp, *next_comma;
for (; action != NULL; action = action->next)
{
struct cmd_list_element *cmd;
QUIT; /* Allow user to bail out with ^C. */
action_exp = action->line;
while (isspace ((int) *action_exp))
action_exp++;
/* The collection actions to be done while stepping are
bracketed by the commands "while-stepping" and "end". */
if (*action_exp == '#') /* comment line */
continue;
cmd = lookup_cmd (&action_exp, cmdlist, "", -1, 1);
if (cmd == 0)
error (_("Bad action list item: %s"), action_exp);
if (cmd_cfunc_eq (cmd, while_stepping_pseudocommand))
{
int i;
for (i = 0; i < action->body_count; ++i)
trace_dump_actions (action->body_list[i],
1, stepping_frame, from_tty);
}
else if (cmd_cfunc_eq (cmd, collect_pseudocommand))
{
/* Display the collected data.
For the trap frame, display only what was collected at
the trap. Likewise for stepping frames, display only
what was collected while stepping. This means that the
two boolean variables, STEPPING_FRAME and
STEPPING_ACTIONS should be equal. */
if (stepping_frame == stepping_actions)
{
if (*action_exp == '/')