From b20a652466ea6e62e7d056188b79a0677a29f46e Mon Sep 17 00:00:00 2001 From: Markus Metzger Date: Fri, 24 Jan 2014 13:45:47 +0100 Subject: btrace: support Intel(R) Processor Trace Adds a new command "record btrace pt" to configure the kernel to use Intel(R) Processor Trace instead of Branch Trace Strore. The "record btrace" command chooses the tracing format automatically. Intel(R) Processor Trace support requires Linux 4.1 and libipt. gdb/ * NEWS: Announce new commands "record btrace pt" and "record pt". Announce new options "set|show record btrace pt buffer-size". * btrace.c: Include "rsp-low.h". Include "inttypes.h". (btrace_add_pc): Add forward declaration. (pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback) (pt_translate_cpu_vendor, btrace_finalize_ftrace_pt) (btrace_compute_ftrace_pt): New. (btrace_compute_ftrace): Support BTRACE_FORMAT_PT. (check_xml_btrace_version): Update version check. (parse_xml_raw, parse_xml_btrace_pt_config_cpu) (parse_xml_btrace_pt_raw, parse_xml_btrace_pt) (btrace_pt_config_cpu_attributes, btrace_pt_config_children) (btrace_pt_children): New. (btrace_children): Add support for "pt". (parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New. (btrace_conf_children): Add support for "pt". * btrace.h: Include "intel-pt.h". (btrace_pt_error): New. * common/btrace-common.c (btrace_format_string, btrace_data_fini) (btrace_data_empty): Support BTRACE_FORMAT_PT. * common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT. (struct btrace_config_pt): New. (struct btrace_config): New. (struct btrace_data_pt_config, struct btrace_data_pt): New. (struct btrace_data): New. * features/btrace-conf.dtd (btrace-conf): New. (pt): New. * features/btrace.dtd (btrace): New. (pt, pt-config, cpu): New. * nat/linux-btrace.c (perf_event_read, perf_event_read_all) (perf_event_pt_event_type, kernel_supports_pt) (linux_supports_pt): New. (linux_supports_btrace): Support BTRACE_FORMAT_PT. (linux_enable_bts): Free tinfo on error. (linux_enable_pt): New. (linux_enable_btrace): Support BTRACE_FORMAT_PT. (linux_disable_pt): New. (linux_disable_btrace): Support BTRACE_FORMAT_PT. (linux_fill_btrace_pt_config, linux_read_pt): New. (linux_read_btrace): Support BTRACE_FORMAT_PT. * nat/linux-btrace.h (struct btrace_tinfo_pt): New. (struct btrace_target_info): New. * record-btrace.c (set_record_btrace_pt_cmdlist) (show_record_btrace_pt_cmdlist): New. (record_btrace_print_pt_conf): New. (record_btrace_print_conf): Support BTRACE_FORMAT_PT. (btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT. (cmd_record_btrace_pt_start): New. (cmd_record_btrace_start): Support BTRACE_FORMAT_PT. (cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New. (_initialize_record_btrace): Add new commands. * remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New. (remote_protocol_features): Add "Qbtrace:pt". Add "Qbtrace-conf:pt:size". (remote_supports_btrace): Support BTRACE_FORMAT_PT. (btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size. (remote_enable_btrace): Support BTRACE_FORMAT_PT. (_initialize_remote): Add new commands. gdbserver/ * linux-low.c: Include "rsp-low.h" (linux_low_encode_pt_config, linux_low_encode_raw): New. (linux_low_read_btrace): Support BTRACE_FORMAT_PT. (linux_low_btrace_conf): Support BTRACE_FORMAT_PT. (handle_btrace_enable_pt): New. (handle_btrace_general_set): Support "pt". (handle_btrace_conf_general_set): Support "pt:size". doc/ * gdb.texinfo (Process Record and Replay): Spell out that variables and registers are not available during btrace replay. Describe the new "record btrace pt" command. Describe the new "set|show record btrace pt buffer-size" options. (General Query Packets): Describe the new Qbtrace:pt and Qbtrace-conf:pt:size packets. Expand "bts" to "Branch Trace Store". Update the branch trace DTD. --- gdb/btrace.h | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) (limited to 'gdb/btrace.h') diff --git a/gdb/btrace.h b/gdb/btrace.h index b7437f173df..c25dc846e28 100644 --- a/gdb/btrace.h +++ b/gdb/btrace.h @@ -29,6 +29,10 @@ #include "btrace-common.h" #include "target/waitstatus.h" /* For enum target_stop_reason. */ +#if defined (HAVE_LIBIPT) +# include +#endif + struct thread_info; struct btrace_function; @@ -97,6 +101,21 @@ enum btrace_bts_error BDE_BTS_INSN_SIZE }; +/* Decode errors for the Intel(R) Processor Trace recording format. */ +enum btrace_pt_error +{ + /* The user cancelled trace processing. */ + BDE_PT_USER_QUIT = 1, + + /* Tracing was temporarily disabled. */ + BDE_PT_DISABLED, + + /* Trace recording overflowed. */ + BDE_PT_OVERFLOW + + /* Negative numbers are used by the decoder library. */ +}; + /* A branch trace function segment. This represents a function segment in a branch trace, i.e. a consecutive -- cgit v1.2.1