+/* Make the traceframe NUM be the current trace frame. Does nothing
+ if NUM is already current. */
+
+void
+set_traceframe_number (int num)
+{
+ int newnum;
+
+ if (traceframe_number == num)
+ {
+ /* Nothing to do. */
+ return;
+ }
+
+ newnum = target_trace_find (tfind_number, num, 0, 0, NULL);
+
+ if (newnum != num)
+ warning (_("could not change traceframe"));
+
+ traceframe_number = newnum;
+
+ /* Changing the traceframe changes our view of registers and of the
+ frame chain. */
+ registers_changed ();
+}
+
+/* A cleanup used when switching away and back from tfind mode. */
+
+struct current_traceframe_cleanup
+{
+ /* The traceframe we were inspecting. */
+ int traceframe_number;
+};
+
+static void
+do_restore_current_traceframe_cleanup (void *arg)
+{
+ struct current_traceframe_cleanup *old = arg;
+
+ set_traceframe_number (old->traceframe_number);
+}
+
+static void
+restore_current_traceframe_cleanup_dtor (void *arg)
+{
+ struct current_traceframe_cleanup *old = arg;
+
+ xfree (old);
+}
+
+struct cleanup *
+make_cleanup_restore_current_traceframe (void)
+{
+ struct current_traceframe_cleanup *old;
+
+ old = xmalloc (sizeof (struct current_traceframe_cleanup));
+ old->traceframe_number = traceframe_number;
+
+ return make_cleanup_dtor (do_restore_current_traceframe_cleanup, old,
+ restore_current_traceframe_cleanup_dtor);
+}
+
+/* Given a number and address, return an uploaded tracepoint with that
+ number, creating if necessary. */
+
+struct uploaded_tp *
+get_uploaded_tp (int num, ULONGEST addr, struct uploaded_tp **utpp)
+{
+ struct uploaded_tp *utp;
+
+ for (utp = *utpp; utp; utp = utp->next)
+ if (utp->number == num && utp->addr == addr)
+ return utp;
+ utp = (struct uploaded_tp *) xmalloc (sizeof (struct uploaded_tp));
+ memset (utp, 0, sizeof (struct uploaded_tp));
+ utp->number = num;
+ utp->addr = addr;
+ utp->next = *utpp;
+ *utpp = utp;
+ return utp;
+}
+
+static void
+free_uploaded_tps (struct uploaded_tp **utpp)
+{
+ struct uploaded_tp *next_one;
+
+ while (*utpp)
+ {
+ next_one = (*utpp)->next;
+ xfree (*utpp);
+ *utpp = next_one;
+ }
+}
+
+/* Given a number and address, return an uploaded tracepoint with that
+ number, creating if necessary. */
+
+struct uploaded_tsv *
+get_uploaded_tsv (int num, struct uploaded_tsv **utsvp)
+{
+ struct uploaded_tsv *utsv;
+
+ for (utsv = *utsvp; utsv; utsv = utsv->next)
+ if (utsv->number == num)
+ return utsv;
+ utsv = (struct uploaded_tsv *) xmalloc (sizeof (struct uploaded_tsv));
+ memset (utsv, 0, sizeof (struct uploaded_tsv));
+ utsv->number = num;
+ utsv->next = *utsvp;
+ *utsvp = utsv;
+ return utsv;
+}
+
+static void
+free_uploaded_tsvs (struct uploaded_tsv **utsvp)
+{
+ struct uploaded_tsv *next_one;
+
+ while (*utsvp)
+ {
+ next_one = (*utsvp)->next;
+ xfree (*utsvp);
+ *utsvp = next_one;
+ }
+}
+
+/* Look for an existing tracepoint that seems similar enough to the
+ uploaded one. Enablement isn't compared, because the user can
+ toggle that freely, and may have done so in anticipation of the
+ next trace run. */
+
+struct breakpoint *
+find_matching_tracepoint (struct uploaded_tp *utp)
+{
+ VEC(breakpoint_p) *tp_vec = all_tracepoints ();
+ int ix;
+ struct breakpoint *t;
+ struct bp_location *loc;
+
+ for (ix = 0; VEC_iterate (breakpoint_p, tp_vec, ix, t); ix++)
+ {
+ if (t->type == utp->type
+ && t->step_count == utp->step
+ && t->pass_count == utp->pass
+ /* FIXME also test conditionals and actions */
+ )
+ {
+ /* Scan the locations for an address match. */
+ for (loc = t->loc; loc; loc = loc->next)
+ {
+ if (loc->address == utp->addr)
+ return t;
+ }
+ }
+ }
+ return NULL;
+}
+
+/* Given a list of tracepoints uploaded from a target, attempt to
+ match them up with existing tracepoints, and create new ones if not
+ found. */
+
+void
+merge_uploaded_tracepoints (struct uploaded_tp **uploaded_tps)
+{
+ struct uploaded_tp *utp;
+ struct breakpoint *t;
+
+ /* Look for GDB tracepoints that match up with our uploaded versions. */
+ for (utp = *uploaded_tps; utp; utp = utp->next)
+ {
+ t = find_matching_tracepoint (utp);
+ if (t)
+ printf_filtered (_("Assuming tracepoint %d is same as target's tracepoint %d at %s.\n"),
+ t->number, utp->number, paddress (get_current_arch (), utp->addr));
+ else
+ {
+ t = create_tracepoint_from_upload (utp);
+ if (t)
+ printf_filtered (_("Created tracepoint %d for target's tracepoint %d at %s.\n"),
+ t->number, utp->number, paddress (get_current_arch (), utp->addr));
+ else
+ printf_filtered (_("Failed to create tracepoint for target's tracepoint %d at %s, skipping it.\n"),
+ utp->number, paddress (get_current_arch (), utp->addr));
+ }
+ /* Whether found or created, record the number used by the
+ target, to help with mapping target tracepoints back to their
+ counterparts here. */
+ if (t)
+ t->number_on_target = utp->number;
+ }
+
+ free_uploaded_tps (uploaded_tps);
+}
+
+/* Trace state variables don't have much to identify them beyond their
+ name, so just use that to detect matches. */
+
+struct trace_state_variable *
+find_matching_tsv (struct uploaded_tsv *utsv)
+{
+ if (!utsv->name)
+ return NULL;
+
+ return find_trace_state_variable (utsv->name);
+}
+
+struct trace_state_variable *
+create_tsv_from_upload (struct uploaded_tsv *utsv)
+{
+ const char *namebase;
+ char buf[20];
+ int try_num = 0;
+ struct trace_state_variable *tsv;
+
+ if (utsv->name)
+ {
+ namebase = utsv->name;
+ sprintf (buf, "%s", namebase);
+ }
+ else
+ {
+ namebase = "__tsv";
+ sprintf (buf, "%s_%d", namebase, try_num++);
+ }
+
+ /* Fish for a name that is not in use. */
+ /* (should check against all internal vars?) */
+ while (find_trace_state_variable (buf))
+ sprintf (buf, "%s_%d", namebase, try_num++);
+
+ /* We have an available name, create the variable. */
+ tsv = create_trace_state_variable (xstrdup (buf));
+ tsv->initial_value = utsv->initial_value;
+ tsv->builtin = utsv->builtin;
+
+ return tsv;
+}
+
+/* Given a list of uploaded trace state variables, try to match them
+ up with existing variables, or create additional ones. */
+
+void
+merge_uploaded_trace_state_variables (struct uploaded_tsv **uploaded_tsvs)
+{
+ int ix;
+ struct uploaded_tsv *utsv;
+ struct trace_state_variable *tsv;
+ int highest;
+
+ /* Most likely some numbers will have to be reassigned as part of
+ the merge, so clear them all in anticipation. */
+ for (ix = 0; VEC_iterate (tsv_s, tvariables, ix, tsv); ++ix)
+ tsv->number = 0;
+
+ for (utsv = *uploaded_tsvs; utsv; utsv = utsv->next)
+ {
+ tsv = find_matching_tsv (utsv);
+ if (tsv)
+ printf_filtered (_("Assuming trace state variable $%s is same as target's variable %d.\n"),
+ tsv->name, utsv->number);
+ else
+ {
+ tsv = create_tsv_from_upload (utsv);
+ printf_filtered (_("Created trace state variable $%s for target's variable %d.\n"),
+ tsv->name, utsv->number);
+ }
+ /* Give precedence to numberings that come from the target. */
+ if (tsv)
+ tsv->number = utsv->number;
+ }
+
+ /* Renumber everything that didn't get a target-assigned number. */
+ highest = 0;
+ for (ix = 0; VEC_iterate (tsv_s, tvariables, ix, tsv); ++ix)
+ if (tsv->number > highest)
+ highest = tsv->number;
+
+ ++highest;
+ for (ix = 0; VEC_iterate (tsv_s, tvariables, ix, tsv); ++ix)
+ if (tsv->number == 0)
+ tsv->number = highest++;
+
+ free_uploaded_tsvs (uploaded_tsvs);
+}
+
+/* target tfile command */
+
+struct target_ops tfile_ops;
+
+/* Fill in tfile_ops with its defined operations and properties. */
+
+#define TRACE_HEADER_SIZE 8
+
+char *trace_filename;
+int trace_fd = -1;
+off_t trace_frames_offset;
+off_t cur_offset;
+int cur_data_size;
+int trace_regblock_size;
+
+static void tfile_interp_line (char *line,
+ struct uploaded_tp **utpp,
+ struct uploaded_tsv **utsvp);
+
+static void
+tfile_open (char *filename, int from_tty)
+{
+ char *temp;
+ struct cleanup *old_chain;
+ int flags;
+ int scratch_chan;
+ char header[TRACE_HEADER_SIZE];
+ char linebuf[1000]; /* should be max remote packet size or so */
+ char byte;
+ int bytes, i, gotten;
+ struct trace_status *ts;
+ struct uploaded_tp *uploaded_tps = NULL;
+ struct uploaded_tsv *uploaded_tsvs = NULL;
+
+ target_preopen (from_tty);
+ if (!filename)
+ error (_("No trace file specified."));
+
+ filename = tilde_expand (filename);
+ if (!IS_ABSOLUTE_PATH(filename))
+ {
+ temp = concat (current_directory, "/", filename, (char *)NULL);
+ xfree (filename);
+ filename = temp;
+ }
+
+ old_chain = make_cleanup (xfree, filename);
+
+ flags = O_BINARY | O_LARGEFILE;
+ flags |= O_RDONLY;
+ scratch_chan = open (filename, flags, 0);
+ if (scratch_chan < 0)
+ perror_with_name (filename);
+
+ /* Looks semi-reasonable. Toss the old trace file and work on the new. */
+
+ discard_cleanups (old_chain); /* Don't free filename any more */
+ unpush_target (&tfile_ops);
+
+ push_target (&tfile_ops);
+
+ trace_filename = xstrdup (filename);
+ trace_fd = scratch_chan;
+
+ bytes = 0;
+ /* Read the file header and test for validity. */
+ gotten = read (trace_fd, &header, TRACE_HEADER_SIZE);
+ if (gotten < 0)
+ perror_with_name (trace_filename);
+ else if (gotten < TRACE_HEADER_SIZE)
+ error (_("Premature end of file while reading trace file"));
+
+ bytes += TRACE_HEADER_SIZE;
+ if (!(header[0] == 0x7f
+ && (strncmp (header + 1, "TRACE0\n", 7) == 0)))
+ error (_("File is not a valid trace file."));
+
+ trace_regblock_size = 0;
+ ts = current_trace_status ();
+ /* We know we're working with a file. */
+ ts->from_file = 1;
+ /* Set defaults in case there is no status line. */
+ ts->running_known = 0;
+ ts->stop_reason = trace_stop_reason_unknown;
+ ts->traceframe_count = -1;
+ ts->buffer_free = 0;
+
+ /* Read through a section of newline-terminated lines that
+ define things like tracepoints. */
+ i = 0;
+ while (1)
+ {
+ gotten = read (trace_fd, &byte, 1);
+ if (gotten < 0)
+ perror_with_name (trace_filename);
+ else if (gotten < 1)
+ error (_("Premature end of file while reading trace file"));
+
+ ++bytes;
+ if (byte == '\n')
+ {
+ /* Empty line marks end of the definition section. */
+ if (i == 0)
+ break;
+ linebuf[i] = '\0';
+ i = 0;
+ tfile_interp_line (linebuf, &uploaded_tps, &uploaded_tsvs);
+ }
+ else
+ linebuf[i++] = byte;
+ if (i >= 1000)
+ error (_("Excessively long lines in trace file"));
+ }
+
+ /* Add the file's tracepoints and variables into the current mix. */
+
+ /* Get trace state variables first, they may be checked when parsing
+ uploaded commands. */
+ merge_uploaded_trace_state_variables (&uploaded_tsvs);
+
+ merge_uploaded_tracepoints (&uploaded_tps);
+
+ /* Record the starting offset of the binary trace data. */
+ trace_frames_offset = bytes;
+
+ /* If we don't have a blocksize, we can't interpret the
+ traceframes. */
+ if (trace_regblock_size == 0)
+ error (_("No register block size recorded in trace file"));
+ if (ts->traceframe_count <= 0)
+ {
+ warning ("No traceframes present in this file.");
+ return;
+ }
+
+#define TFILE_PID (1)
+ inferior_appeared (current_inferior (), TFILE_PID);
+ inferior_ptid = pid_to_ptid (TFILE_PID);
+ add_thread_silent (inferior_ptid);
+
+ post_create_inferior (&tfile_ops, from_tty);
+
+#if 0
+ /* FIXME this will get defined in MI patch submission */
+ tfind_1 (tfind_number, 0, 0, 0, 0);
+#endif
+}
+
+/* Interpret the given line from the definitions part of the trace
+ file. */
+
+static void
+tfile_interp_line (char *line,
+ struct uploaded_tp **utpp, struct uploaded_tsv **utsvp)
+{
+ char *p = line;
+
+ if (strncmp (p, "R ", strlen ("R ")) == 0)
+ {
+ p += strlen ("R ");
+ trace_regblock_size = strtol (p, &p, 16);
+ }
+ else if (strncmp (p, "status ", strlen ("status ")) == 0)
+ {
+ p += strlen ("status ");
+ parse_trace_status (p, current_trace_status ());
+ }
+ else if (strncmp (p, "tp ", strlen ("tp ")) == 0)
+ {
+ p += strlen ("tp ");
+ parse_tracepoint_definition (p, utpp);
+ }
+ else if (strncmp (p, "tsv ", strlen ("tsv ")) == 0)
+ {
+ p += strlen ("tsv ");
+ parse_tsv_definition (p, utsvp);
+ }
+ else
+ warning ("Ignoring trace file definition \"%s\"", line);
+}
+
+/* Parse the part of trace status syntax that is shared between
+ the remote protocol and the trace file reader. */
+
+extern char *unpack_varlen_hex (char *buff, ULONGEST *result);
+
+void
+parse_trace_status (char *line, struct trace_status *ts)
+{
+ char *p = line, *p1, *p_temp;
+ ULONGEST val;
+
+ ts->running_known = 1;
+ ts->running = (*p++ == '1');
+ ts->stop_reason = trace_stop_reason_unknown;
+ while (*p++)
+ {
+ p1 = strchr (p, ':');
+ if (p1 == NULL)
+ error (_("Malformed trace status, at %s\n\
+Status line: '%s'\n"), p, line);
+ if (strncmp (p, stop_reason_names[trace_buffer_full], p1 - p) == 0)
+ {
+ p = unpack_varlen_hex (++p1, &val);
+ ts->stop_reason = trace_buffer_full;
+ }
+ else if (strncmp (p, stop_reason_names[trace_never_run], p1 - p) == 0)
+ {
+ p = unpack_varlen_hex (++p1, &val);
+ ts->stop_reason = trace_never_run;
+ }
+ else if (strncmp (p, stop_reason_names[tracepoint_passcount], p1 - p) == 0)
+ {
+ p = unpack_varlen_hex (++p1, &val);
+ ts->stop_reason = tracepoint_passcount;
+ ts->stopping_tracepoint = val;
+ }
+ else if (strncmp (p, stop_reason_names[tstop_command], p1 - p) == 0)
+ {
+ p = unpack_varlen_hex (++p1, &val);
+ ts->stop_reason = tstop_command;
+ }
+ if (strncmp (p, "tframes", p1 - p) == 0)
+ {
+ p = unpack_varlen_hex (++p1, &val);
+ ts->traceframe_count = val;
+ }
+ if (strncmp (p, "tfree", p1 - p) == 0)
+ {
+ p = unpack_varlen_hex (++p1, &val);
+ ts->buffer_free = val;
+ }
+ else
+ {
+ /* Silently skip unknown optional info. */
+ p_temp = strchr (p1 + 1, ';');
+ if (p_temp)
+ p = p_temp;
+ else
+ /* Must be at the end. */
+ break;
+ }
+ }
+}
+
+/* Given a line of text defining a tracepoint or tracepoint action, parse
+ it into an "uploaded tracepoint". */
+
+void
+parse_tracepoint_definition (char *line, struct uploaded_tp **utpp)
+{
+ char *p;
+ char piece;
+ ULONGEST num, addr, step, pass, orig_size, xlen;
+ int enabled, i;
+ enum bptype type;
+ char *cond;
+ struct uploaded_tp *utp = NULL;
+
+ p = line;
+ /* Both tracepoint and action definitions start with the same number
+ and address sequence. */
+ piece = *p++;
+ p = unpack_varlen_hex (p, &num);
+ p++; /* skip a colon */
+ p = unpack_varlen_hex (p, &addr);
+ p++; /* skip a colon */
+ if (piece == 'T')
+ {
+ enabled = (*p++ == 'E');
+ p++; /* skip a colon */
+ p = unpack_varlen_hex (p, &step);
+ p++; /* skip a colon */
+ p = unpack_varlen_hex (p, &pass);
+ type = bp_tracepoint;
+ cond = NULL;
+ /* Thumb through optional fields. */
+ while (*p == ':')
+ {
+ p++; /* skip a colon */
+ if (*p == 'F')
+ {
+ type = bp_fast_tracepoint;
+ p++;
+ p = unpack_varlen_hex (p, &orig_size);
+ }
+ else if (*p == 'X')
+ {
+ p++;
+ p = unpack_varlen_hex (p, &xlen);
+ p++; /* skip a comma */
+ cond = (char *) xmalloc (2 * xlen + 1);
+ strncpy (cond, p, 2 * xlen);
+ cond[2 * xlen] = '\0';
+ p += 2 * xlen;
+ }
+ else
+ warning ("Unrecognized char '%c' in tracepoint definition, skipping rest", *p);
+ }
+ utp = get_uploaded_tp (num, addr, utpp);
+ utp->type = type;
+ utp->enabled = enabled;
+ utp->step = step;
+ utp->pass = pass;
+ utp->cond = cond;
+ }
+ else if (piece == 'A')
+ {
+ utp = get_uploaded_tp (num, addr, utpp);
+ utp->actions[utp->numactions++] = xstrdup (p);
+ }
+ else if (piece == 'S')
+ {
+ utp = get_uploaded_tp (num, addr, utpp);
+ utp->step_actions[utp->num_step_actions++] = xstrdup (p);
+ }
+ else
+ {
+ error ("Invalid tracepoint piece");
+ }
+}
+
+/* Convert a textual description of a trace state variable into an
+ uploaded object. */
+
+void
+parse_tsv_definition (char *line, struct uploaded_tsv **utsvp)
+{
+ char *p, *buf;
+ ULONGEST num, initval, builtin;
+ int end;
+ struct uploaded_tsv *utsv = NULL;
+
+ buf = alloca (strlen (line));
+
+ p = line;
+ p = unpack_varlen_hex (p, &num);
+ p++; /* skip a colon */
+ p = unpack_varlen_hex (p, &initval);
+ p++; /* skip a colon */
+ p = unpack_varlen_hex (p, &builtin);
+ p++; /* skip a colon */
+ end = hex2bin (p, (gdb_byte *) buf, strlen (p) / 2);
+ buf[end] = '\0';
+
+ utsv = get_uploaded_tsv (num, utsvp);
+ utsv->initial_value = initval;
+ utsv->builtin = builtin;
+ utsv->name = xstrdup (buf);
+}
+
+/* Close the trace file and generally clean up. */
+
+static void
+tfile_close (int quitting)
+{
+ int pid;
+
+ if (trace_fd < 0)
+ return;
+
+ pid = ptid_get_pid (inferior_ptid);
+ inferior_ptid = null_ptid; /* Avoid confusion from thread stuff */
+ exit_inferior_silent (pid);
+
+ close (trace_fd);
+ trace_fd = -1;
+ if (trace_filename)
+ xfree (trace_filename);
+}
+
+static void
+tfile_files_info (struct target_ops *t)
+{
+ /* (it would be useful to mention the name of the file) */
+ printf_filtered ("Looking at a trace file.\n");
+}
+
+/* The trace status for a file is that tracing can never be run. */
+
+static int
+tfile_get_trace_status (struct trace_status *ts)
+{
+ /* Other bits of trace status were collected as part of opening the
+ trace files, so nothing to do here. */
+
+ return -1;
+}
+
+/* Given the position of a traceframe in the file, figure out what
+ address the frame was collected at. This would normally be the
+ value of a collected PC register, but if not available, we
+ improvise. */
+
+static ULONGEST
+tfile_get_traceframe_address (off_t tframe_offset)
+{
+ ULONGEST addr = 0;
+ short tpnum;
+ struct breakpoint *tp;
+ off_t saved_offset = cur_offset;
+ int gotten;
+
+ /* FIXME dig pc out of collected registers */
+
+ /* Fall back to using tracepoint address. */
+ lseek (trace_fd, tframe_offset, SEEK_SET);
+ gotten = read (trace_fd, &tpnum, 2);
+ if (gotten < 0)
+ perror_with_name (trace_filename);
+ else if (gotten < 2)
+ error (_("Premature end of file while reading trace file"));
+
+ tp = get_tracepoint_by_number_on_target (tpnum);
+ /* FIXME this is a poor heuristic if multiple locations */
+ if (tp && tp->loc)
+ addr = tp->loc->address;
+
+ /* Restore our seek position. */
+ cur_offset = saved_offset;
+ lseek (trace_fd, cur_offset, SEEK_SET);
+ return addr;
+}
+
+/* Given a type of search and some parameters, scan the collection of
+ traceframes in the file looking for a match. When found, return
+ both the traceframe and tracepoint number, otherwise -1 for
+ each. */
+
+static int
+tfile_trace_find (enum trace_find_type type, int num,
+ ULONGEST addr1, ULONGEST addr2, int *tpp)
+{
+ short tpnum;
+ int tfnum = 0, found = 0, gotten;
+ int data_size;
+ struct breakpoint *tp;
+ off_t offset, tframe_offset;
+ ULONGEST tfaddr;
+
+ lseek (trace_fd, trace_frames_offset, SEEK_SET);
+ offset = trace_frames_offset;
+ while (1)
+ {
+ tframe_offset = offset;
+ gotten = read (trace_fd, &tpnum, 2);
+ if (gotten < 0)
+ perror_with_name (trace_filename);
+ else if (gotten < 2)
+ error (_("Premature end of file while reading trace file"));
+ offset += 2;
+ if (tpnum == 0)
+ break;
+ gotten = read (trace_fd, &data_size, 4);
+ if (gotten < 0)
+ perror_with_name (trace_filename);
+ else if (gotten < 4)
+ error (_("Premature end of file while reading trace file"));
+ offset += 4;
+ switch (type)
+ {
+ case tfind_number:
+ if (tfnum == num)
+ found = 1;
+ break;
+ case tfind_pc:
+ tfaddr = tfile_get_traceframe_address (tframe_offset);
+ if (tfaddr == addr1)
+ found = 1;
+ break;
+ case tfind_tp:
+ tp = get_tracepoint (num);
+ if (tp && tpnum == tp->number_on_target)
+ found = 1;
+ break;
+ case tfind_range:
+ tfaddr = tfile_get_traceframe_address (tframe_offset);
+ if (addr1 <= tfaddr && tfaddr <= addr2)
+ found = 1;
+ break;
+ case tfind_outside:
+ tfaddr = tfile_get_traceframe_address (tframe_offset);
+ if (!(addr1 <= tfaddr && tfaddr <= addr2))
+ found = 1;
+ break;
+ default:
+ internal_error (__FILE__, __LINE__, _("unknown tfind type"));
+ }
+ if (found)
+ {
+ printf_filtered ("Found traceframe %d.\n", tfnum);
+ if (tpp)
+ *tpp = tpnum;
+ cur_offset = offset;
+ cur_data_size = data_size;
+ return tfnum;
+ }
+ /* Skip past the traceframe's data. */
+ lseek (trace_fd, data_size, SEEK_CUR);
+ offset += data_size;
+ /* Update our own count of traceframes. */
+ ++tfnum;
+ }
+ /* Did not find what we were looking for. */
+ if (tpp)
+ *tpp = -1;
+ return -1;
+}
+
+/* Look for a block of saved registers in the traceframe, and get the
+ requested register from it. */
+
+static void
+tfile_fetch_registers (struct target_ops *ops,
+ struct regcache *regcache, int regno)
+{
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ char block_type;
+ int i, pos, offset, regn, regsize, gotten;
+ unsigned short mlen;
+ char *regs;
+
+ /* An uninitialized reg size says we're not going to be
+ successful at getting register blocks. */
+ if (!trace_regblock_size)
+ return;
+
+ regs = alloca (trace_regblock_size);
+
+ lseek (trace_fd, cur_offset, SEEK_SET);
+ pos = 0;
+ while (pos < cur_data_size)
+ {
+ gotten = read (trace_fd, &block_type, 1);
+ if (gotten < 0)
+ perror_with_name (trace_filename);
+ else if (gotten < 1)
+ error (_("Premature end of file while reading trace file"));
+
+ ++pos;
+ switch (block_type)
+ {
+ case 'R':
+ gotten = read (trace_fd, regs, trace_regblock_size);
+ if (gotten < 0)
+ perror_with_name (trace_filename);
+ else if (gotten < trace_regblock_size)
+ error (_("Premature end of file while reading trace file"));
+
+ /* Assume the block is laid out in GDB register number order,
+ each register with the size that it has in GDB. */
+ offset = 0;
+ for (regn = 0; regn < gdbarch_num_regs (gdbarch); regn++)
+ {
+ regsize = register_size (gdbarch, regn);
+ /* Make sure we stay within block bounds. */
+ if (offset + regsize >= trace_regblock_size)
+ break;
+ if (!regcache_valid_p (regcache, regn))
+ {
+ if (regno == regn)
+ {
+ regcache_raw_supply (regcache, regno, regs + offset);
+ break;
+ }
+ else if (regno == -1)
+ {
+ regcache_raw_supply (regcache, regn, regs + offset);
+ }
+ }
+ offset += regsize;
+ }
+ return;
+ case 'M':
+ lseek (trace_fd, 8, SEEK_CUR);
+ gotten = read (trace_fd, &mlen, 2);
+ if (gotten < 0)
+ perror_with_name (trace_filename);
+ else if (gotten < 2)
+ error (_("Premature end of file while reading trace file"));
+ lseek (trace_fd, mlen, SEEK_CUR);
+ pos += (8 + 2 + mlen);
+ break;
+ case 'V':
+ lseek (trace_fd, 4 + 8, SEEK_CUR);
+ pos += (4 + 8);
+ break;
+ default:
+ error ("Unknown block type '%c' (0x%x) in trace frame",
+ block_type, block_type);
+ break;
+ }
+ }
+}
+
+static LONGEST
+tfile_xfer_partial (struct target_ops *ops, enum target_object object,
+ const char *annex, gdb_byte *readbuf,
+ const gdb_byte *writebuf, ULONGEST offset, LONGEST len)
+{
+ char block_type;
+ int pos, gotten;
+ ULONGEST maddr;
+ unsigned short mlen;
+
+ /* We're only doing regular memory for now. */
+ if (object != TARGET_OBJECT_MEMORY)
+ return -1;
+
+ if (readbuf == NULL)
+ error ("tfile_xfer_partial: trace file is read-only");
+
+ lseek (trace_fd, cur_offset, SEEK_SET);
+ pos = 0;
+ while (pos < cur_data_size)
+ {
+ gotten = read (trace_fd, &block_type, 1);
+ if (gotten < 0)
+ perror_with_name (trace_filename);
+ else if (gotten < 1)
+ error (_("Premature end of file while reading trace file"));
+ ++pos;
+ switch (block_type)
+ {
+ case 'R':
+ lseek (trace_fd, trace_regblock_size, SEEK_CUR);
+ pos += trace_regblock_size;
+ break;
+ case 'M':
+ gotten = read (trace_fd, &maddr, 8);
+ if (gotten < 0)
+ perror_with_name (trace_filename);
+ else if (gotten < 8)
+ error (_("Premature end of file while reading trace file"));
+
+ gotten = read (trace_fd, &mlen, 2);
+ if (gotten < 0)
+ perror_with_name (trace_filename);
+ else if (gotten < 2)
+ error (_("Premature end of file while reading trace file"));
+ if (maddr <= offset && (offset + len) <= (maddr + mlen))
+ {
+ gotten = read (trace_fd, readbuf, mlen);
+ if (gotten < 0)
+ perror_with_name (trace_filename);
+ else if (gotten < mlen)
+ error (_("Premature end of file qwhile reading trace file"));
+
+ return mlen;
+ }
+ lseek (trace_fd, mlen, SEEK_CUR);
+ pos += (8 + 2 + mlen);
+ break;
+ case 'V':
+ lseek (trace_fd, 4 + 8, SEEK_CUR);
+ pos += (4 + 8);
+ break;
+ default:
+ error ("Unknown block type '%c' (0x%x) in traceframe",
+ block_type, block_type);
+ break;
+ }
+ }
+ /* Indicate failure to find the requested memory block. */
+ return -1;
+}
+
+/* Iterate through the blocks of a trace frame, looking for a 'V'
+ block with a matching tsv number. */
+
+static int
+tfile_get_trace_state_variable_value (int tsvnum, LONGEST *val)
+{
+ char block_type;
+ int pos, vnum, gotten;
+ unsigned short mlen;
+
+ lseek (trace_fd, cur_offset, SEEK_SET);
+ pos = 0;
+ while (pos < cur_data_size)
+ {
+ gotten = read (trace_fd, &block_type, 1);
+ if (gotten < 0)
+ perror_with_name (trace_filename);
+ else if (gotten < 1)
+ error (_("Premature end of file while reading trace file"));
+ ++pos;
+ switch (block_type)
+ {
+ case 'R':
+ lseek (trace_fd, trace_regblock_size, SEEK_CUR);
+ pos += trace_regblock_size;
+ break;
+ case 'M':
+ lseek (trace_fd, 8, SEEK_CUR);
+ gotten = read (trace_fd, &mlen, 2);
+ if (gotten < 0)
+ perror_with_name (trace_filename);
+ else if (gotten < 2)
+ error (_("Premature end of file while reading trace file"));
+ lseek (trace_fd, mlen, SEEK_CUR);
+ pos += (8 + 2 + mlen);
+ break;
+ case 'V':
+ gotten = read (trace_fd, &vnum, 4);
+ if (gotten < 0)
+ perror_with_name (trace_filename);
+ else if (gotten < 4)
+ error (_("Premature end of file while reading trace file"));
+ if (tsvnum == vnum)
+ {
+ gotten = read (trace_fd, val, 8);
+ if (gotten < 0)
+ perror_with_name (trace_filename);
+ else if (gotten < 8)
+ error (_("Premature end of file while reading trace file"));
+ return 1;
+ }
+ lseek (trace_fd, 8, SEEK_CUR);
+ pos += (4 + 8);
+ break;
+ default:
+ error ("Unknown block type '%c' (0x%x) in traceframe",
+ block_type, block_type);
+ break;
+ }
+ }
+ /* Didn't find anything. */
+ return 0;
+}
+
+static int
+tfile_has_memory (struct target_ops *ops)
+{
+ return 1;
+}
+
+static int
+tfile_has_stack (struct target_ops *ops)
+{
+ return 1;
+}
+
+static int
+tfile_has_registers (struct target_ops *ops)
+{
+ return 1;
+}
+
+static void
+init_tfile_ops (void)
+{
+ tfile_ops.to_shortname = "tfile";
+ tfile_ops.to_longname = "Local trace dump file";
+ tfile_ops.to_doc =
+ "Use a trace file as a target. Specify the filename of the trace file.";
+ tfile_ops.to_open = tfile_open;
+ tfile_ops.to_close = tfile_close;
+ tfile_ops.to_fetch_registers = tfile_fetch_registers;
+ tfile_ops.to_xfer_partial = tfile_xfer_partial;
+ tfile_ops.to_files_info = tfile_files_info;
+ tfile_ops.to_get_trace_status = tfile_get_trace_status;
+ tfile_ops.to_trace_find = tfile_trace_find;
+ tfile_ops.to_get_trace_state_variable_value = tfile_get_trace_state_variable_value;
+ /* core_stratum might seem more logical, but GDB doesn't like having
+ more than one core_stratum vector. */
+ tfile_ops.to_stratum = process_stratum;
+ tfile_ops.to_has_memory = tfile_has_memory;
+ tfile_ops.to_has_stack = tfile_has_stack;
+ tfile_ops.to_has_registers = tfile_has_registers;
+ tfile_ops.to_magic = OPS_MAGIC;
+}
+