static int ctf_trace_find (struct target_ops *self, enum trace_find_type type, int num, CORE_ADDR addr1, CORE_ADDR addr2, int *tpp) { int ret = -1; int tfnum = 0; int found = 0; struct bt_iter_pos pos; if (num == -1) { if (tpp != NULL) *tpp = -1; return -1; } gdb_assert (ctf_iter != NULL); /* Set iterator back to the start. */ bt_iter_set_pos (bt_ctf_get_iter (ctf_iter), start_pos); while (1) { int id; struct bt_ctf_event *event; const char *name; event = bt_ctf_iter_read_event (ctf_iter); name = bt_ctf_event_name (event); if (event == NULL || name == NULL) break; if (strcmp (name, "frame") == 0) { CORE_ADDR tfaddr; if (type == tfind_number) { /* Looking for a specific trace frame. */ if (tfnum == num) found = 1; } else { /* Start from the _next_ trace frame. */ if (tfnum > get_traceframe_number ()) { switch (type) { case tfind_tp: { struct tracepoint *tp = get_tracepoint (num); if (tp != NULL && (tp->number_on_target == ctf_get_tpnum_from_frame_event (event))) found = 1; break; } case tfind_pc: tfaddr = ctf_get_traceframe_address (); if (tfaddr == addr1) found = 1; break; case tfind_range: tfaddr = ctf_get_traceframe_address (); if (addr1 <= tfaddr && tfaddr <= addr2) found = 1; break; case tfind_outside: tfaddr = ctf_get_traceframe_address (); if (!(addr1 <= tfaddr && tfaddr <= addr2)) found = 1; break; default: internal_error (__FILE__, __LINE__, _("unknown tfind type")); } } } if (found) { if (tpp != NULL) *tpp = ctf_get_tpnum_from_frame_event (event); /* Skip the event "frame". */ bt_iter_next (bt_ctf_get_iter (ctf_iter)); return tfnum; } tfnum++; } if (bt_iter_next (bt_ctf_get_iter (ctf_iter)) < 0) break; } return -1; }
static int tracefile_has_registers (struct target_ops *ops) { return get_traceframe_number () != -1; }
static enum target_xfer_status ctf_xfer_partial (struct target_ops *ops, enum target_object object, const char *annex, gdb_byte *readbuf, const gdb_byte *writebuf, ULONGEST offset, ULONGEST len, ULONGEST *xfered_len) { /* We're only doing regular memory for now. */ if (object != TARGET_OBJECT_MEMORY) return -1; if (readbuf == NULL) error (_("ctf_xfer_partial: trace file is read-only")); if (get_traceframe_number () != -1) { struct bt_iter_pos *pos; int i = 0; enum target_xfer_status res; /* Records the lowest available address of all blocks that intersects the requested range. */ ULONGEST low_addr_available = 0; gdb_assert (ctf_iter != NULL); /* Save the current position. */ pos = bt_iter_get_pos (bt_ctf_get_iter (ctf_iter)); gdb_assert (pos->type == BT_SEEK_RESTORE); /* Iterate through the traceframe's blocks, looking for memory. */ while (1) { ULONGEST amt; uint64_t maddr; uint16_t mlen; enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ()); const struct bt_definition *scope; const struct bt_definition *def; struct bt_ctf_event *event = bt_ctf_iter_read_event (ctf_iter); const char *name = bt_ctf_event_name (event); if (name == NULL || strcmp (name, "frame") == 0) break; else if (strcmp (name, "memory") != 0) { if (bt_iter_next (bt_ctf_get_iter (ctf_iter)) < 0) break; continue; } scope = bt_ctf_get_top_level_scope (event, BT_EVENT_FIELDS); def = bt_ctf_get_field (event, scope, "address"); maddr = bt_ctf_get_uint64 (def); def = bt_ctf_get_field (event, scope, "length"); mlen = (uint16_t) bt_ctf_get_uint64 (def); /* If the block includes the first part of the desired range, return as much it has; GDB will re-request the remainder, which might be in a different block of this trace frame. */ if (maddr <= offset && offset < (maddr + mlen)) { const struct bt_definition *array = bt_ctf_get_field (event, scope, "contents"); const struct bt_declaration *decl = bt_ctf_get_decl_from_def (array); gdb_byte *contents; int k; contents = xmalloc (mlen); for (k = 0; k < mlen; k++) { const struct bt_definition *element = bt_ctf_get_index (event, array, k); contents[k] = (gdb_byte) bt_ctf_get_uint64 (element); } amt = (maddr + mlen) - offset; if (amt > len) amt = len; memcpy (readbuf, &contents[offset - maddr], amt); xfree (contents); /* Restore the position. */ bt_iter_set_pos (bt_ctf_get_iter (ctf_iter), pos); if (amt == 0) return TARGET_XFER_EOF; else { *xfered_len = amt; return TARGET_XFER_OK; } } if (offset < maddr && maddr < (offset + len)) if (low_addr_available == 0 || low_addr_available > maddr) low_addr_available = maddr; if (bt_iter_next (bt_ctf_get_iter (ctf_iter)) < 0) break; } /* Restore the position. */ bt_iter_set_pos (bt_ctf_get_iter (ctf_iter), pos); /* Requested memory is unavailable in the context of traceframes, and this address falls within a read-only section, fallback to reading from executable, up to LOW_ADDR_AVAILABLE */ if (offset < low_addr_available) len = min (len, low_addr_available - offset); res = exec_read_partial_read_only (readbuf, offset, len, xfered_len); if (res == TARGET_XFER_OK) return TARGET_XFER_OK; else { /* No use trying further, we know some memory starting at MEMADDR isn't available. */ *xfered_len = len; return TARGET_XFER_UNAVAILABLE; } } else { /* Fallback to reading from read-only sections. */ return section_table_read_available_memory (readbuf, offset, len, xfered_len); } }