/* Branch trace support for GDB, the GNU debugger.
- Copyright (C) 2013-2017 Free Software Foundation, Inc.
+ Copyright (C) 2013-2018 Free Software Foundation, Inc.
Contributed by Intel Corp. <markus.t.metzger@intel.com>
#include "gdbcmd.h"
#include "cli/cli-utils.h"
+/* For maintenance commands. */
+#include "record-btrace.h"
+
#include <inttypes.h>
#include <ctype.h>
#include <algorithm>
config.begin = btrace->data;
config.end = btrace->data + btrace->size;
- config.cpu.vendor = pt_translate_cpu_vendor (btrace->config.cpu.vendor);
- config.cpu.family = btrace->config.cpu.family;
- config.cpu.model = btrace->config.cpu.model;
- config.cpu.stepping = btrace->config.cpu.stepping;
+ /* We treat an unknown vendor as 'no errata'. */
+ if (btrace->config.cpu.vendor != CV_UNKNOWN)
+ {
+ config.cpu.vendor
+ = pt_translate_cpu_vendor (btrace->config.cpu.vendor);
+ config.cpu.family = btrace->config.cpu.family;
+ config.cpu.model = btrace->config.cpu.model;
+ config.cpu.stepping = btrace->config.cpu.stepping;
- errcode = pt_cpu_errata (&config.errata, &config.cpu);
- if (errcode < 0)
- error (_("Failed to configure the Intel Processor Trace decoder: %s."),
- pt_errstr (pt_errcode (errcode)));
+ errcode = pt_cpu_errata (&config.errata, &config.cpu);
+ if (errcode < 0)
+ error (_("Failed to configure the Intel Processor Trace "
+ "decoder: %s."), pt_errstr (pt_errcode (errcode)));
+ }
decoder = pt_insn_alloc_decoder (&config);
if (decoder == NULL)
#endif /* defined (HAVE_LIBIPT) */
/* Compute the function branch trace from a block branch trace BTRACE for
- a thread given by BTINFO. */
+ a thread given by BTINFO. If CPU is not NULL, overwrite the cpu in the
+ branch trace configuration. This is currently only used for the PT
+ format. */
static void
-btrace_compute_ftrace_1 (struct thread_info *tp, struct btrace_data *btrace,
+btrace_compute_ftrace_1 (struct thread_info *tp,
+ struct btrace_data *btrace,
+ const struct btrace_cpu *cpu,
std::vector<unsigned int> &gaps)
{
DEBUG ("compute ftrace");
return;
case BTRACE_FORMAT_PT:
+ /* Overwrite the cpu we use for enabling errata workarounds. */
+ if (cpu != nullptr)
+ btrace->variant.pt.config.cpu = *cpu;
+
btrace_compute_ftrace_pt (tp, &btrace->variant.pt, gaps);
return;
}
}
static void
-btrace_compute_ftrace (struct thread_info *tp, struct btrace_data *btrace)
+btrace_compute_ftrace (struct thread_info *tp, struct btrace_data *btrace,
+ const struct btrace_cpu *cpu)
{
std::vector<unsigned int> gaps;
TRY
{
- btrace_compute_ftrace_1 (tp, btrace, gaps);
+ btrace_compute_ftrace_1 (tp, btrace, cpu, gaps);
}
CATCH (error, RETURN_MASK_ALL)
{
block->begin = pc;
block->end = pc;
- btrace_compute_ftrace (tp, &btrace);
+ btrace_compute_ftrace (tp, &btrace, NULL);
do_cleanups (cleanup);
}
#if !defined (HAVE_LIBIPT)
if (conf->format == BTRACE_FORMAT_PT)
- error (_("GDB does not support Intel Processor Trace."));
+ error (_("Intel Processor Trace support was disabled at compile time."));
#endif /* !defined (HAVE_LIBIPT) */
- if (!target_supports_btrace (conf->format))
- error (_("Target does not support branch tracing."));
-
DEBUG ("enable thread %s (%s)", print_thread_id (tp),
target_pid_to_str (tp->ptid));
btrace_disable (struct thread_info *tp)
{
struct btrace_thread_info *btp = &tp->btrace;
- int errcode = 0;
if (btp->target == NULL)
return;
btrace_teardown (struct thread_info *tp)
{
struct btrace_thread_info *btp = &tp->btrace;
- int errcode = 0;
if (btp->target == NULL)
return;
/* See btrace.h. */
void
-btrace_fetch (struct thread_info *tp)
+btrace_fetch (struct thread_info *tp, const struct btrace_cpu *cpu)
{
struct btrace_thread_info *btinfo;
struct btrace_target_info *tinfo;
btrace_maint_clear (btinfo);
btrace_clear_history (btinfo);
- btrace_compute_ftrace (tp, &btrace);
+ btrace_compute_ftrace (tp, &btrace, cpu);
}
do_cleanups (cleanup);
static void
check_xml_btrace_version (struct gdb_xml_parser *parser,
const struct gdb_xml_element *element,
- void *user_data, VEC (gdb_xml_value_s) *attributes)
+ void *user_data,
+ std::vector<gdb_xml_value> &attributes)
{
const char *version
- = (const char *) xml_find_attribute (attributes, "version")->value;
+ = (const char *) xml_find_attribute (attributes, "version")->value.get ();
if (strcmp (version, "1.0") != 0)
gdb_xml_error (parser, _("Unsupported btrace version: \"%s\""), version);
static void
parse_xml_btrace_block (struct gdb_xml_parser *parser,
const struct gdb_xml_element *element,
- void *user_data, VEC (gdb_xml_value_s) *attributes)
+ void *user_data,
+ std::vector<gdb_xml_value> &attributes)
{
struct btrace_data *btrace;
struct btrace_block *block;
gdb_xml_error (parser, _("Btrace format error."));
}
- begin = (ULONGEST *) xml_find_attribute (attributes, "begin")->value;
- end = (ULONGEST *) xml_find_attribute (attributes, "end")->value;
+ begin = (ULONGEST *) xml_find_attribute (attributes, "begin")->value.get ();
+ end = (ULONGEST *) xml_find_attribute (attributes, "end")->value.get ();
block = VEC_safe_push (btrace_block_s, btrace->variant.bts.blocks, NULL);
block->begin = *begin;
parse_xml_btrace_pt_config_cpu (struct gdb_xml_parser *parser,
const struct gdb_xml_element *element,
void *user_data,
- VEC (gdb_xml_value_s) *attributes)
+ std::vector<gdb_xml_value> &attributes)
{
struct btrace_data *btrace;
const char *vendor;
ULONGEST *family, *model, *stepping;
- vendor = (const char *) xml_find_attribute (attributes, "vendor")->value;
- family = (ULONGEST *) xml_find_attribute (attributes, "family")->value;
- model = (ULONGEST *) xml_find_attribute (attributes, "model")->value;
- stepping = (ULONGEST *) xml_find_attribute (attributes, "stepping")->value;
+ vendor =
+ (const char *) xml_find_attribute (attributes, "vendor")->value.get ();
+ family
+ = (ULONGEST *) xml_find_attribute (attributes, "family")->value.get ();
+ model
+ = (ULONGEST *) xml_find_attribute (attributes, "model")->value.get ();
+ stepping
+ = (ULONGEST *) xml_find_attribute (attributes, "stepping")->value.get ();
btrace = (struct btrace_data *) user_data;
static void
parse_xml_btrace_pt (struct gdb_xml_parser *parser,
const struct gdb_xml_element *element,
- void *user_data, VEC (gdb_xml_value_s) *attributes)
+ void *user_data,
+ std::vector<gdb_xml_value> &attributes)
{
struct btrace_data *btrace;
#else /* !defined (HAVE_LIBEXPAT) */
- error (_("Cannot process branch trace. XML parsing is not supported."));
+ error (_("Cannot process branch trace. XML support was disabled at "
+ "compile time."));
#endif /* !defined (HAVE_LIBEXPAT) */
}
static void
parse_xml_btrace_conf_bts (struct gdb_xml_parser *parser,
const struct gdb_xml_element *element,
- void *user_data, VEC (gdb_xml_value_s) *attributes)
+ void *user_data,
+ std::vector<gdb_xml_value> &attributes)
{
struct btrace_config *conf;
struct gdb_xml_value *size;
size = xml_find_attribute (attributes, "size");
if (size != NULL)
- conf->bts.size = (unsigned int) *(ULONGEST *) size->value;
+ conf->bts.size = (unsigned int) *(ULONGEST *) size->value.get ();
}
/* Parse a btrace-conf "pt" xml record. */
static void
parse_xml_btrace_conf_pt (struct gdb_xml_parser *parser,
const struct gdb_xml_element *element,
- void *user_data, VEC (gdb_xml_value_s) *attributes)
+ void *user_data,
+ std::vector<gdb_xml_value> &attributes)
{
struct btrace_config *conf;
struct gdb_xml_value *size;
size = xml_find_attribute (attributes, "size");
if (size != NULL)
- conf->pt.size = (unsigned int) *(ULONGEST *) size->value;
+ conf->pt.size = (unsigned int) *(ULONGEST *) size->value.get ();
}
static const struct gdb_xml_attribute btrace_conf_pt_attributes[] = {
#else /* !defined (HAVE_LIBEXPAT) */
- error (_("XML parsing is not supported."));
+ error (_("Cannot process the branch trace configuration. XML support "
+ "was disabled at compile time."));
#endif /* !defined (HAVE_LIBEXPAT) */
}
static void
btrace_maint_update_pt_packets (struct btrace_thread_info *btinfo)
{
- volatile struct gdb_exception except;
struct pt_packet_decoder *decoder;
+ const struct btrace_cpu *cpu;
struct btrace_data_pt *pt;
struct pt_config config;
int errcode;
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;
+ cpu = record_btrace_get_cpu ();
+ if (cpu == nullptr)
+ cpu = &pt->config.cpu;
- errcode = pt_cpu_errata (&config.errata, &config.cpu);
- if (errcode < 0)
- error (_("Failed to configure the Intel Processor Trace decoder: %s."),
- pt_errstr (pt_errcode (errcode)));
+ /* We treat an unknown vendor as 'no errata'. */
+ if (cpu->vendor != CV_UNKNOWN)
+ {
+ config.cpu.vendor = pt_translate_cpu_vendor (cpu->vendor);
+ config.cpu.family = cpu->family;
+ config.cpu.model = cpu->model;
+ config.cpu.stepping = cpu->stepping;
+
+ errcode = pt_cpu_errata (&config.errata, &config.cpu);
+ if (errcode < 0)
+ error (_("Failed to configure the Intel Processor Trace "
+ "decoder: %s."), pt_errstr (pt_errcode (errcode)));
+ }
decoder = pt_pkt_alloc_decoder (&config);
if (decoder == NULL)
/* Read a number from an argument string. */
static unsigned int
-get_uint (char **arg)
+get_uint (const char **arg)
{
- char *begin, *end, *pos;
+ const char *begin, *pos;
+ char *end;
unsigned long number;
begin = *arg;
/* Read a context size from an argument string. */
static int
-get_context_size (char **arg)
+get_context_size (const char **arg)
{
- char *pos;
- int number;
-
- pos = skip_spaces (*arg);
+ const char *pos = skip_spaces (*arg);
if (!isdigit (*pos))
error (_("Expected positive number, got: %s."), pos);
- return strtol (pos, arg, 10);
+ char *end;
+ long result = strtol (pos, &end, 10);
+ *arg = end;
+ return result;
}
/* Complain about junk at the end of an argument string. */
static void
-no_chunk (char *arg)
+no_chunk (const 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)
+maint_btrace_packet_history_cmd (const char *arg, int from_tty)
{
struct btrace_thread_info *btinfo;
struct thread_info *tp;
/* The "maintenance btrace clear-packet-history" command. */
static void
-maint_btrace_clear_packet_history_cmd (char *args, int from_tty)
+maint_btrace_clear_packet_history_cmd (const char *args, int from_tty)
{
struct btrace_thread_info *btinfo;
struct thread_info *tp;
/* The "maintenance btrace clear" command. */
static void
-maint_btrace_clear_cmd (char *args, int from_tty)
+maint_btrace_clear_cmd (const char *args, int from_tty)
{
- struct btrace_thread_info *btinfo;
struct thread_info *tp;
if (args != NULL && *args != 0)
/* The "maintenance btrace" command. */
static void
-maint_btrace_cmd (char *args, int from_tty)
+maint_btrace_cmd (const 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)
+maint_btrace_set_cmd (const 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)
+maint_btrace_show_cmd (const 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)
+maint_btrace_pt_set_cmd (const 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)
+maint_btrace_pt_show_cmd (const 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)
+maint_info_btrace_cmd (const char *args, int from_tty)
{
struct btrace_thread_info *btinfo;
struct thread_info *tp;
/* Initialize btrace maintenance commands. */
-void _initialize_btrace (void);
void
_initialize_btrace (void)
{
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