diff options
Diffstat (limited to 'gdb/btrace.c')
| -rw-r--r-- | gdb/btrace.c | 733 |
1 files changed, 733 insertions, 0 deletions
diff --git a/gdb/btrace.c b/gdb/btrace.c index 87b2601..b924e7d 100644 --- a/gdb/btrace.c +++ b/gdb/btrace.c @@ -32,8 +32,21 @@ #include "xml-support.h" #include "regcache.h" #include "rsp-low.h" +#include "gdbcmd.h" +#include "cli/cli-utils.h" #include <inttypes.h> +#include <ctype.h> + +/* Command lists for btrace maintenance commands. */ +static struct cmd_list_element *maint_btrace_cmdlist; +static struct cmd_list_element *maint_btrace_set_cmdlist; +static struct cmd_list_element *maint_btrace_show_cmdlist; +static struct cmd_list_element *maint_btrace_pt_set_cmdlist; +static struct cmd_list_element *maint_btrace_pt_show_cmdlist; + +/* Control whether to skip PAD packets when computing the packet history. */ +static int maint_btrace_pt_skip_pad = 1; static void btrace_add_pc (struct thread_info *tp); @@ -1197,6 +1210,33 @@ btrace_clear_history (struct btrace_thread_info *btinfo) btinfo->replay = NULL; } +/* Clear the branch trace maintenance histories in BTINFO. */ + +static void +btrace_maint_clear (struct btrace_thread_info *btinfo) +{ + switch (btinfo->data.format) + { + default: + break; + + case BTRACE_FORMAT_BTS: + btinfo->maint.variant.bts.packet_history.begin = 0; + btinfo->maint.variant.bts.packet_history.end = 0; + break; + +#if defined (HAVE_LIBIPT) + case BTRACE_FORMAT_PT: + xfree (btinfo->maint.variant.pt.packets); + + btinfo->maint.variant.pt.packets = NULL; + btinfo->maint.variant.pt.packet_history.begin = 0; + btinfo->maint.variant.pt.packet_history.end = 0; + break; +#endif /* defined (HAVE_LIBIPT) */ + } +} + /* See btrace.h. */ void @@ -1263,6 +1303,7 @@ btrace_fetch (struct thread_info *tp) /* Store the raw trace data. The stored data will be cleared in btrace_clear, so we always append the new trace. */ btrace_data_append (&btinfo->data, &btrace); + btrace_maint_clear (btinfo); btrace_clear_history (btinfo); btrace_compute_ftrace (tp, &btrace); @@ -1300,6 +1341,8 @@ btrace_clear (struct thread_info *tp) btinfo->end = NULL; btinfo->ngaps = 0; + /* Must clear the maint data before - it depends on BTINFO->DATA. */ + btrace_maint_clear (btinfo); btrace_data_clear (&btinfo->data); btrace_clear_history (btinfo); } @@ -2203,3 +2246,693 @@ make_cleanup_btrace_data (struct btrace_data *data) { return make_cleanup (do_btrace_data_cleanup, data); } + +#if defined (HAVE_LIBIPT) + +/* Print a single packet. */ + +static void +pt_print_packet (const struct pt_packet *packet) +{ + switch (packet->type) + { + default: + printf_unfiltered (("[??: %x]"), packet->type); + break; + + case ppt_psb: + printf_unfiltered (("psb")); + break; + + case ppt_psbend: + printf_unfiltered (("psbend")); + break; + + case ppt_pad: + printf_unfiltered (("pad")); + break; + + case ppt_tip: + printf_unfiltered (("tip %u: 0x%" PRIx64 ""), + packet->payload.ip.ipc, + packet->payload.ip.ip); + break; + + case ppt_tip_pge: + printf_unfiltered (("tip.pge %u: 0x%" PRIx64 ""), + packet->payload.ip.ipc, + packet->payload.ip.ip); + break; + + case ppt_tip_pgd: + printf_unfiltered (("tip.pgd %u: 0x%" PRIx64 ""), + packet->payload.ip.ipc, + packet->payload.ip.ip); + break; + + case ppt_fup: + printf_unfiltered (("fup %u: 0x%" PRIx64 ""), + packet->payload.ip.ipc, + packet->payload.ip.ip); + break; + + case ppt_tnt_8: + printf_unfiltered (("tnt-8 %u: 0x%" PRIx64 ""), + packet->payload.tnt.bit_size, + packet->payload.tnt.payload); + break; + + case ppt_tnt_64: + printf_unfiltered (("tnt-64 %u: 0x%" PRIx64 ""), + packet->payload.tnt.bit_size, + packet->payload.tnt.payload); + break; + + case ppt_pip: + printf_unfiltered (("pip %" PRIx64 ""), packet->payload.pip.cr3); + break; + + case ppt_tsc: + printf_unfiltered (("tsc %" PRIx64 ""), packet->payload.tsc.tsc); + break; + + case ppt_cbr: + printf_unfiltered (("cbr %u"), packet->payload.cbr.ratio); + break; + + case ppt_mode: + switch (packet->payload.mode.leaf) + { + default: + printf_unfiltered (("mode %u"), packet->payload.mode.leaf); + break; + + case pt_mol_exec: + printf_unfiltered (("mode.exec%s%s"), + packet->payload.mode.bits.exec.csl + ? (" cs.l") : (""), + packet->payload.mode.bits.exec.csd + ? (" cs.d") : ("")); + break; + + case pt_mol_tsx: + printf_unfiltered (("mode.tsx%s%s"), + packet->payload.mode.bits.tsx.intx + ? (" intx") : (""), + packet->payload.mode.bits.tsx.abrt + ? (" abrt") : ("")); + break; + } + break; + + case ppt_ovf: + printf_unfiltered (("ovf")); + break; + + } +} + +/* Decode packets into MAINT using DECODER. */ + +static void +btrace_maint_decode_pt (struct btrace_maint_info *maint, + struct pt_packet_decoder *decoder) +{ + int errcode; + + for (;;) + { + struct btrace_pt_packet packet; + + errcode = pt_pkt_sync_forward (decoder); + if (errcode < 0) + break; + + for (;;) + { + pt_pkt_get_offset (decoder, &packet.offset); + + errcode = pt_pkt_next (decoder, &packet.packet, + sizeof(packet.packet)); + if (errcode < 0) + break; + + if (maint_btrace_pt_skip_pad == 0 || packet.packet.type != ppt_pad) + { + packet.errcode = pt_errcode (errcode); + VEC_safe_push (btrace_pt_packet_s, maint->variant.pt.packets, + &packet); + } + } + + if (errcode == -pte_eos) + break; + + packet.errcode = pt_errcode (errcode); + VEC_safe_push (btrace_pt_packet_s, maint->variant.pt.packets, + &packet); + + warning (_("Error at trace offset 0x%" PRIx64 ": %s."), + packet.offset, pt_errstr (packet.errcode)); + } + + if (errcode != -pte_eos) + warning (_("Failed to synchronize onto the Intel(R) Processor Trace " + "stream: %s."), pt_errstr (pt_errcode (errcode))); +} + +/* Update the packet history in BTINFO. */ + +static void +btrace_maint_update_pt_packets (struct btrace_thread_info *btinfo) +{ + volatile struct gdb_exception except; + struct pt_packet_decoder *decoder; + struct btrace_data_pt *pt; + struct pt_config config; + int errcode; + + pt = &btinfo->data.variant.pt; + + /* Nothing to do if there is no trace. */ + if (pt->size == 0) + return; + + memset (&config, 0, sizeof(config)); + + config.size = sizeof (config); + config.begin = pt->data; + config.end = pt->data + pt->size; + + config.cpu.vendor = pt_translate_cpu_vendor (pt->config.cpu.vendor); + config.cpu.family = pt->config.cpu.family; + config.cpu.model = pt->config.cpu.model; + config.cpu.stepping = pt->config.cpu.stepping; + + errcode = pt_cpu_errata (&config.errata, &config.cpu); + if (errcode < 0) + error (_("Failed to configure the Intel(R) Processor Trace decoder: %s."), + pt_errstr (pt_errcode (errcode))); + + decoder = pt_pkt_alloc_decoder (&config); + if (decoder == NULL) + error (_("Failed to allocate the Intel(R) Processor Trace decoder.")); + + TRY + { + btrace_maint_decode_pt (&btinfo->maint, decoder); + } + CATCH (except, RETURN_MASK_ALL) + { + pt_pkt_free_decoder (decoder); + + if (except.reason < 0) + throw_exception (except); + } + END_CATCH + + pt_pkt_free_decoder (decoder); +} + +#endif /* !defined (HAVE_LIBIPT) */ + +/* Update the packet maintenance information for BTINFO and store the + low and high bounds into BEGIN and END, respectively. + Store the current iterator state into FROM and TO. */ + +static void +btrace_maint_update_packets (struct btrace_thread_info *btinfo, + unsigned int *begin, unsigned int *end, + unsigned int *from, unsigned int *to) +{ + switch (btinfo->data.format) + { + default: + *begin = 0; + *end = 0; + *from = 0; + *to = 0; + break; + + case BTRACE_FORMAT_BTS: + /* Nothing to do - we operate directly on BTINFO->DATA. */ + *begin = 0; + *end = VEC_length (btrace_block_s, btinfo->data.variant.bts.blocks); + *from = btinfo->maint.variant.bts.packet_history.begin; + *to = btinfo->maint.variant.bts.packet_history.end; + break; + +#if defined (HAVE_LIBIPT) + case BTRACE_FORMAT_PT: + if (VEC_empty (btrace_pt_packet_s, btinfo->maint.variant.pt.packets)) + btrace_maint_update_pt_packets (btinfo); + + *begin = 0; + *end = VEC_length (btrace_pt_packet_s, btinfo->maint.variant.pt.packets); + *from = btinfo->maint.variant.pt.packet_history.begin; + *to = btinfo->maint.variant.pt.packet_history.end; + break; +#endif /* defined (HAVE_LIBIPT) */ + } +} + +/* Print packets in BTINFO from BEGIN (inclusive) until END (exclusive) and + update the current iterator position. */ + +static void +btrace_maint_print_packets (struct btrace_thread_info *btinfo, + unsigned int begin, unsigned int end) +{ + switch (btinfo->data.format) + { + default: + break; + + case BTRACE_FORMAT_BTS: + { + VEC (btrace_block_s) *blocks; + unsigned int blk; + + blocks = btinfo->data.variant.bts.blocks; + for (blk = begin; blk < end; ++blk) + { + const btrace_block_s *block; + + block = VEC_index (btrace_block_s, blocks, blk); + + printf_unfiltered ("%u\tbegin: %s, end: %s\n", blk, + core_addr_to_string_nz (block->begin), + core_addr_to_string_nz (block->end)); + } + + btinfo->maint.variant.bts.packet_history.begin = begin; + btinfo->maint.variant.bts.packet_history.end = end; + } + break; + +#if defined (HAVE_LIBIPT) + case BTRACE_FORMAT_PT: + { + VEC (btrace_pt_packet_s) *packets; + unsigned int pkt; + + packets = btinfo->maint.variant.pt.packets; + for (pkt = begin; pkt < end; ++pkt) + { + const struct btrace_pt_packet *packet; + + packet = VEC_index (btrace_pt_packet_s, packets, pkt); + + printf_unfiltered ("%u\t", pkt); + printf_unfiltered ("0x%" PRIx64 "\t", packet->offset); + + if (packet->errcode == pte_ok) + pt_print_packet (&packet->packet); + else + printf_unfiltered ("[error: %s]", pt_errstr (packet->errcode)); + + printf_unfiltered ("\n"); + } + + btinfo->maint.variant.pt.packet_history.begin = begin; + btinfo->maint.variant.pt.packet_history.end = end; + } + break; +#endif /* defined (HAVE_LIBIPT) */ + } +} + +/* Read a number from an argument string. */ + +static unsigned int +get_uint (char **arg) +{ + char *begin, *end, *pos; + unsigned long number; + + begin = *arg; + pos = skip_spaces (begin); + + if (!isdigit (*pos)) + error (_("Expected positive number, got: %s."), pos); + + number = strtoul (pos, &end, 10); + if (number > UINT_MAX) + error (_("Number too big.")); + + *arg += (end - begin); + + return (unsigned int) number; +} + +/* Read a context size from an argument string. */ + +static int +get_context_size (char **arg) +{ + char *pos; + int number; + + pos = skip_spaces (*arg); + + if (!isdigit (*pos)) + error (_("Expected positive number, got: %s."), pos); + + return strtol (pos, arg, 10); +} + +/* Complain about junk at the end of an argument string. */ + +static void +no_chunk (char *arg) +{ + if (*arg != 0) + error (_("Junk after argument: %s."), arg); +} + +/* The "maintenance btrace packet-history" command. */ + +static void +maint_btrace_packet_history_cmd (char *arg, int from_tty) +{ + struct btrace_thread_info *btinfo; + struct thread_info *tp; + unsigned int size, begin, end, from, to; + + tp = find_thread_ptid (inferior_ptid); + if (tp == NULL) + error (_("No thread.")); + + size = 10; + btinfo = &tp->btrace; + + btrace_maint_update_packets (btinfo, &begin, &end, &from, &to); + if (begin == end) + { + printf_unfiltered (_("No trace.\n")); + return; + } + + if (arg == NULL || *arg == 0 || strcmp (arg, "+") == 0) + { + from = to; + + if (end - from < size) + size = end - from; + to = from + size; + } + else if (strcmp (arg, "-") == 0) + { + to = from; + + if (to - begin < size) + size = to - begin; + from = to - size; + } + else + { + from = get_uint (&arg); + if (end <= from) + error (_("'%u' is out of range."), from); + + arg = skip_spaces (arg); + if (*arg == ',') + { + arg = skip_spaces (++arg); + + if (*arg == '+') + { + arg += 1; + size = get_context_size (&arg); + + no_chunk (arg); + + if (end - from < size) + size = end - from; + to = from + size; + } + else if (*arg == '-') + { + arg += 1; + size = get_context_size (&arg); + + no_chunk (arg); + + /* Include the packet given as first argument. */ + from += 1; + to = from; + + if (to - begin < size) + size = to - begin; + from = to - size; + } + else + { + to = get_uint (&arg); + + /* Include the packet at the second argument and silently + truncate the range. */ + if (to < end) + to += 1; + else + to = end; + + no_chunk (arg); + } + } + else + { + no_chunk (arg); + + if (end - from < size) + size = end - from; + to = from + size; + } + + dont_repeat (); + } + + btrace_maint_print_packets (btinfo, from, to); +} + +/* The "maintenance btrace clear-packet-history" command. */ + +static void +maint_btrace_clear_packet_history_cmd (char *args, int from_tty) +{ + struct btrace_thread_info *btinfo; + struct thread_info *tp; + + if (args != NULL && *args != 0) + error (_("Invalid argument.")); + + tp = find_thread_ptid (inferior_ptid); + if (tp == NULL) + error (_("No thread.")); + + btinfo = &tp->btrace; + + /* Must clear the maint data before - it depends on BTINFO->DATA. */ + btrace_maint_clear (btinfo); + btrace_data_clear (&btinfo->data); +} + +/* The "maintenance btrace clear" command. */ + +static void +maint_btrace_clear_cmd (char *args, int from_tty) +{ + struct btrace_thread_info *btinfo; + struct thread_info *tp; + + if (args != NULL && *args != 0) + error (_("Invalid argument.")); + + tp = find_thread_ptid (inferior_ptid); + if (tp == NULL) + error (_("No thread.")); + + btrace_clear (tp); +} + +/* The "maintenance btrace" command. */ + +static void +maint_btrace_cmd (char *args, int from_tty) +{ + help_list (maint_btrace_cmdlist, "maintenance btrace ", all_commands, + gdb_stdout); +} + +/* The "maintenance set btrace" command. */ + +static void +maint_btrace_set_cmd (char *args, int from_tty) +{ + help_list (maint_btrace_set_cmdlist, "maintenance set btrace ", all_commands, + gdb_stdout); +} + +/* The "maintenance show btrace" command. */ + +static void +maint_btrace_show_cmd (char *args, int from_tty) +{ + help_list (maint_btrace_show_cmdlist, "maintenance show btrace ", + all_commands, gdb_stdout); +} + +/* The "maintenance set btrace pt" command. */ + +static void +maint_btrace_pt_set_cmd (char *args, int from_tty) +{ + help_list (maint_btrace_pt_set_cmdlist, "maintenance set btrace pt ", + all_commands, gdb_stdout); +} + +/* The "maintenance show btrace pt" command. */ + +static void +maint_btrace_pt_show_cmd (char *args, int from_tty) +{ + help_list (maint_btrace_pt_show_cmdlist, "maintenance show btrace pt ", + all_commands, gdb_stdout); +} + +/* The "maintenance info btrace" command. */ + +static void +maint_info_btrace_cmd (char *args, int from_tty) +{ + struct btrace_thread_info *btinfo; + struct thread_info *tp; + const struct btrace_config *conf; + + if (args != NULL && *args != 0) + error (_("Invalid argument.")); + + tp = find_thread_ptid (inferior_ptid); + if (tp == NULL) + error (_("No thread.")); + + btinfo = &tp->btrace; + + conf = btrace_conf (btinfo); + if (conf == NULL) + error (_("No btrace configuration.")); + + printf_unfiltered (_("Format: %s.\n"), + btrace_format_string (conf->format)); + + switch (conf->format) + { + default: + break; + + case BTRACE_FORMAT_BTS: + printf_unfiltered (_("Number of packets: %u.\n"), + VEC_length (btrace_block_s, + btinfo->data.variant.bts.blocks)); + break; + +#if defined (HAVE_LIBIPT) + case BTRACE_FORMAT_PT: + { + struct pt_version version; + + version = pt_library_version (); + printf_unfiltered (_("Version: %u.%u.%u%s.\n"), version.major, + version.minor, version.build, + version.ext != NULL ? version.ext : ""); + + btrace_maint_update_pt_packets (btinfo); + printf_unfiltered (_("Number of packets: %u.\n"), + VEC_length (btrace_pt_packet_s, + btinfo->maint.variant.pt.packets)); + } + break; +#endif /* defined (HAVE_LIBIPT) */ + } +} + +/* The "maint show btrace pt skip-pad" show value function. */ + +static void +show_maint_btrace_pt_skip_pad (struct ui_file *file, int from_tty, + struct cmd_list_element *c, + const char *value) +{ + fprintf_filtered (file, _("Skip PAD packets is %s.\n"), value); +} + + +/* Initialize btrace maintenance commands. */ + +void _initialize_btrace (void); +void +_initialize_btrace (void) +{ + add_cmd ("btrace", class_maintenance, maint_info_btrace_cmd, + _("Info about branch tracing data."), &maintenanceinfolist); + + add_prefix_cmd ("btrace", class_maintenance, maint_btrace_cmd, + _("Branch tracing maintenance commands."), + &maint_btrace_cmdlist, "maintenance btrace ", + 0, &maintenancelist); + + add_prefix_cmd ("btrace", class_maintenance, maint_btrace_set_cmd, _("\ +Set branch tracing specific variables."), + &maint_btrace_set_cmdlist, "maintenance set btrace ", + 0, &maintenance_set_cmdlist); + + add_prefix_cmd ("pt", class_maintenance, maint_btrace_pt_set_cmd, _("\ +Set Intel(R) Processor Trace specific variables."), + &maint_btrace_pt_set_cmdlist, "maintenance set btrace pt ", + 0, &maint_btrace_set_cmdlist); + + add_prefix_cmd ("btrace", class_maintenance, maint_btrace_show_cmd, _("\ +Show branch tracing specific variables."), + &maint_btrace_show_cmdlist, "maintenance show btrace ", + 0, &maintenance_show_cmdlist); + + add_prefix_cmd ("pt", class_maintenance, maint_btrace_pt_show_cmd, _("\ +Show Intel(R) Processor Trace specific variables."), + &maint_btrace_pt_show_cmdlist, "maintenance show btrace pt ", + 0, &maint_btrace_show_cmdlist); + + add_setshow_boolean_cmd ("skip-pad", class_maintenance, + &maint_btrace_pt_skip_pad, _("\ +Set whether PAD packets should be skipped in the btrace packet history."), _("\ +Show whether PAD packets should be skipped in the btrace packet history."),_("\ +When enabled, PAD packets are ignored in the btrace packet history."), + NULL, show_maint_btrace_pt_skip_pad, + &maint_btrace_pt_set_cmdlist, + &maint_btrace_pt_show_cmdlist); + + add_cmd ("packet-history", class_maintenance, maint_btrace_packet_history_cmd, + _("Print the raw branch tracing data.\n\ +With no argument, print ten more packets after the previous ten-line print.\n\ +With '-' as argument print ten packets before a previous ten-line print.\n\ +One argument specifies the starting packet of a ten-line print.\n\ +Two arguments with comma between specify starting and ending packets to \ +print.\n\ +Preceded with '+'/'-' the second argument specifies the distance from the \ +first.\n"), + &maint_btrace_cmdlist); + + add_cmd ("clear-packet-history", class_maintenance, + maint_btrace_clear_packet_history_cmd, + _("Clears the branch tracing packet history.\n\ +Discards the raw branch tracing data but not the execution history data.\n\ +"), + &maint_btrace_cmdlist); + + add_cmd ("clear", class_maintenance, maint_btrace_clear_cmd, + _("Clears the branch tracing data.\n\ +Discards the raw branch tracing data and the execution history data.\n\ +The next 'record' command will fetch the branch tracing data anew.\n\ +"), + &maint_btrace_cmdlist); + +} |