/* Branch trace support for GDB, the GNU debugger.
- Copyright (C) 2013-2014 Free Software Foundation, Inc.
+ Copyright (C) 2013-2019 Free Software Foundation, Inc.
Contributed by Intel Corp. <markus.t.metzger@intel.com>
#include "defs.h"
#include "record.h"
+#include "record-btrace.h"
#include "gdbthread.h"
#include "target.h"
#include "gdbcmd.h"
#include "disasm.h"
-#include "observer.h"
-#include "exceptions.h"
+#include "observable.h"
#include "cli/cli-utils.h"
#include "source.h"
#include "ui-out.h"
#include "symtab.h"
#include "filenames.h"
+#include "regcache.h"
+#include "frame-unwind.h"
+#include "hashtab.h"
+#include "infrun.h"
+#include "event-loop.h"
+#include "inf-loop.h"
+#include "gdbsupport/vec.h"
+#include "inferior.h"
+#include <algorithm>
+#include "gdbarch.h"
+
+static const target_info record_btrace_target_info = {
+ "record-btrace",
+ N_("Branch tracing target"),
+ N_("Collect control-flow trace and provide the execution history.")
+};
/* The target_ops of record-btrace. */
-static struct target_ops record_btrace_ops;
-/* A new thread observer enabling branch tracing for the new thread. */
-static struct observer *record_btrace_thread_observer;
+class record_btrace_target final : public target_ops
+{
+public:
+ const target_info &info () const override
+ { return record_btrace_target_info; }
+
+ strata stratum () const override { return record_stratum; }
+
+ void close () override;
+ void async (int) override;
+
+ void detach (inferior *inf, int from_tty) override
+ { record_detach (this, inf, from_tty); }
+
+ void disconnect (const char *, int) override;
+
+ void mourn_inferior () override
+ { record_mourn_inferior (this); }
+
+ void kill () override
+ { record_kill (this); }
+
+ enum record_method record_method (ptid_t ptid) override;
+
+ void stop_recording () override;
+ void info_record () override;
+
+ void insn_history (int size, gdb_disassembly_flags flags) override;
+ void insn_history_from (ULONGEST from, int size,
+ gdb_disassembly_flags flags) override;
+ void insn_history_range (ULONGEST begin, ULONGEST end,
+ gdb_disassembly_flags flags) override;
+ void call_history (int size, record_print_flags flags) override;
+ void call_history_from (ULONGEST begin, int size, record_print_flags flags)
+ override;
+ void call_history_range (ULONGEST begin, ULONGEST end, record_print_flags flags)
+ override;
+
+ bool record_is_replaying (ptid_t ptid) override;
+ bool record_will_replay (ptid_t ptid, int dir) override;
+ void record_stop_replaying () override;
+
+ enum target_xfer_status xfer_partial (enum target_object object,
+ const char *annex,
+ gdb_byte *readbuf,
+ const gdb_byte *writebuf,
+ ULONGEST offset, ULONGEST len,
+ ULONGEST *xfered_len) override;
+
+ int insert_breakpoint (struct gdbarch *,
+ struct bp_target_info *) override;
+ int remove_breakpoint (struct gdbarch *, struct bp_target_info *,
+ enum remove_bp_reason) override;
+
+ void fetch_registers (struct regcache *, int) override;
+
+ void store_registers (struct regcache *, int) override;
+ void prepare_to_store (struct regcache *) override;
+
+ const struct frame_unwind *get_unwinder () override;
+
+ const struct frame_unwind *get_tailcall_unwinder () override;
+
+ void commit_resume () override;
+ void resume (ptid_t, int, enum gdb_signal) override;
+ ptid_t wait (ptid_t, struct target_waitstatus *, int) override;
+
+ void stop (ptid_t) override;
+ void update_thread_list () override;
+ bool thread_alive (ptid_t ptid) override;
+ void goto_record_begin () override;
+ void goto_record_end () override;
+ void goto_record (ULONGEST insn) override;
+
+ bool can_execute_reverse () override;
+
+ bool stopped_by_sw_breakpoint () override;
+ bool supports_stopped_by_sw_breakpoint () override;
+
+ bool stopped_by_hw_breakpoint () override;
+ bool supports_stopped_by_hw_breakpoint () override;
+
+ enum exec_direction_kind execution_direction () override;
+ void prepare_to_generate_core () override;
+ void done_generating_core () override;
+};
+
+static record_btrace_target record_btrace_ops;
+
+/* Initialize the record-btrace target ops. */
+
+/* Token associated with a new-thread observer enabling branch tracing
+ for the new thread. */
+static const gdb::observers::token record_btrace_thread_observer_token {};
+
+/* Memory access types used in set/show record btrace replay-memory-access. */
+static const char replay_memory_access_read_only[] = "read-only";
+static const char replay_memory_access_read_write[] = "read-write";
+static const char *const replay_memory_access_types[] =
+{
+ replay_memory_access_read_only,
+ replay_memory_access_read_write,
+ NULL
+};
+
+/* The currently allowed replay memory access type. */
+static const char *replay_memory_access = replay_memory_access_read_only;
+
+/* The cpu state kinds. */
+enum record_btrace_cpu_state_kind
+{
+ CS_AUTO,
+ CS_NONE,
+ CS_CPU
+};
+
+/* The current cpu state. */
+static enum record_btrace_cpu_state_kind record_btrace_cpu_state = CS_AUTO;
+
+/* The current cpu for trace decode. */
+static struct btrace_cpu record_btrace_cpu;
+
+/* Command lists for "set/show record btrace". */
+static struct cmd_list_element *set_record_btrace_cmdlist;
+static struct cmd_list_element *show_record_btrace_cmdlist;
+
+/* The execution direction of the last resume we got. See record-full.c. */
+static enum exec_direction_kind record_btrace_resume_exec_dir = EXEC_FORWARD;
+
+/* The async event handler for reverse/replay execution. */
+static struct async_event_handler *record_btrace_async_inferior_event_handler;
+
+/* A flag indicating that we are currently generating a core file. */
+static int record_btrace_generating_corefile;
+
+/* The current branch trace configuration. */
+static struct btrace_config record_btrace_conf;
+
+/* Command list for "record btrace". */
+static struct cmd_list_element *record_btrace_cmdlist;
+
+/* Command lists for "set/show record btrace bts". */
+static struct cmd_list_element *set_record_btrace_bts_cmdlist;
+static struct cmd_list_element *show_record_btrace_bts_cmdlist;
+
+/* Command lists for "set/show record btrace pt". */
+static struct cmd_list_element *set_record_btrace_pt_cmdlist;
+static struct cmd_list_element *show_record_btrace_pt_cmdlist;
+
+/* Command list for "set record btrace cpu". */
+static struct cmd_list_element *set_record_btrace_cpu_cmdlist;
/* Print a record-btrace debug message. Use do ... while (0) to avoid
ambiguities when used in if statements. */
while (0)
+/* Return the cpu configured by the user. Returns NULL if the cpu was
+ configured as auto. */
+const struct btrace_cpu *
+record_btrace_get_cpu (void)
+{
+ switch (record_btrace_cpu_state)
+ {
+ case CS_AUTO:
+ return nullptr;
+
+ case CS_NONE:
+ record_btrace_cpu.vendor = CV_UNKNOWN;
+ /* Fall through. */
+ case CS_CPU:
+ return &record_btrace_cpu;
+ }
+
+ error (_("Internal error: bad record btrace cpu state."));
+}
+
/* Update the branch trace for the current thread and return a pointer to its
- branch trace information struct.
+ thread_info.
Throws an error if there is no thread or no trace. This function never
returns NULL. */
-static struct btrace_thread_info *
-require_btrace (void)
+static struct thread_info *
+require_btrace_thread (void)
{
- struct thread_info *tp;
- struct btrace_thread_info *btinfo;
-
DEBUG ("require");
- tp = find_thread_ptid (inferior_ptid);
- if (tp == NULL)
+ if (inferior_ptid == null_ptid)
error (_("No thread."));
- btrace_fetch (tp);
+ thread_info *tp = inferior_thread ();
- btinfo = &tp->btrace;
+ validate_registers_access ();
- if (btinfo->begin == NULL)
+ btrace_fetch (tp, record_btrace_get_cpu ());
+
+ if (btrace_is_empty (tp))
error (_("No trace."));
- return btinfo;
+ return tp;
}
-/* Enable branch tracing for one thread. Warn on errors. */
+/* Update the branch trace for the current thread and return a pointer to its
+ branch trace information struct.
-static void
-record_btrace_enable_warn (struct thread_info *tp)
+ Throws an error if there is no thread or no trace. This function never
+ returns NULL. */
+
+static struct btrace_thread_info *
+require_btrace (void)
{
- volatile struct gdb_exception error;
+ struct thread_info *tp;
- TRY_CATCH (error, RETURN_MASK_ERROR)
- btrace_enable (tp);
+ tp = require_btrace_thread ();
- if (error.message != NULL)
- warning ("%s", error.message);
+ return &tp->btrace;
}
-/* Callback function to disable branch tracing for one thread. */
+/* Enable branch tracing for one thread. Warn on errors. */
static void
-record_btrace_disable_callback (void *arg)
+record_btrace_enable_warn (struct thread_info *tp)
{
- struct thread_info *tp;
-
- tp = arg;
-
- btrace_disable (tp);
+ try
+ {
+ btrace_enable (tp, &record_btrace_conf);
+ }
+ catch (const gdb_exception_error &error)
+ {
+ warning ("%s", error.what ());
+ }
}
/* Enable automatic tracing of new threads. */
{
DEBUG ("attach thread observer");
- record_btrace_thread_observer
- = observer_attach_new_thread (record_btrace_enable_warn);
+ gdb::observers::new_thread.attach (record_btrace_enable_warn,
+ record_btrace_thread_observer_token);
}
/* Disable automatic tracing of new threads. */
static void
record_btrace_auto_disable (void)
{
- /* The observer may have been detached, already. */
- if (record_btrace_thread_observer == NULL)
- return;
-
DEBUG ("detach thread observer");
- observer_detach_new_thread (record_btrace_thread_observer);
- record_btrace_thread_observer = NULL;
+ gdb::observers::new_thread.detach (record_btrace_thread_observer_token);
}
-/* The to_open method of target record-btrace. */
+/* The record-btrace async event handler function. */
static void
-record_btrace_open (char *args, int from_tty)
+record_btrace_handle_async_inferior_event (gdb_client_data data)
{
- struct cleanup *disable_chain;
- struct thread_info *tp;
+ inferior_event_handler (INF_REG_EVENT, NULL);
+}
+
+/* See record-btrace.h. */
+
+void
+record_btrace_push_target (void)
+{
+ const char *format;
+
+ record_btrace_auto_enable ();
+
+ push_target (&record_btrace_ops);
+
+ record_btrace_async_inferior_event_handler
+ = create_async_event_handler (record_btrace_handle_async_inferior_event,
+ NULL);
+ record_btrace_generating_corefile = 0;
+
+ format = btrace_format_short_string (record_btrace_conf.format);
+ gdb::observers::record_changed.notify (current_inferior (), 1, "btrace", format);
+}
+
+/* Disable btrace on a set of threads on scope exit. */
+
+struct scoped_btrace_disable
+{
+ scoped_btrace_disable () = default;
+
+ DISABLE_COPY_AND_ASSIGN (scoped_btrace_disable);
+
+ ~scoped_btrace_disable ()
+ {
+ for (thread_info *tp : m_threads)
+ btrace_disable (tp);
+ }
+
+ void add_thread (thread_info *thread)
+ {
+ m_threads.push_front (thread);
+ }
+
+ void discard ()
+ {
+ m_threads.clear ();
+ }
+
+private:
+ std::forward_list<thread_info *> m_threads;
+};
+
+/* Open target record-btrace. */
+
+static void
+record_btrace_target_open (const char *args, int from_tty)
+{
+ /* If we fail to enable btrace for one thread, disable it for the threads for
+ which it was successfully enabled. */
+ scoped_btrace_disable btrace_disable;
DEBUG ("open");
if (!target_has_execution)
error (_("The program is not being run."));
- if (!target_supports_btrace ())
- error (_("Target does not support branch tracing."));
-
- gdb_assert (record_btrace_thread_observer == NULL);
-
- disable_chain = make_cleanup (null_cleanup, NULL);
- ALL_THREADS (tp)
- if (args == NULL || *args == 0 || number_is_in_list (args, tp->num))
+ for (thread_info *tp : all_non_exited_threads ())
+ if (args == NULL || *args == 0 || number_is_in_list (args, tp->global_num))
{
- btrace_enable (tp);
+ btrace_enable (tp, &record_btrace_conf);
- make_cleanup (record_btrace_disable_callback, tp);
+ btrace_disable.add_thread (tp);
}
- record_btrace_auto_enable ();
-
- push_target (&record_btrace_ops);
-
- observer_notify_record_changed (current_inferior (), 1);
+ record_btrace_push_target ();
- discard_cleanups (disable_chain);
+ btrace_disable.discard ();
}
-/* The to_stop_recording method of target record-btrace. */
+/* The stop_recording method of target record-btrace. */
-static void
-record_btrace_stop_recording (void)
+void
+record_btrace_target::stop_recording ()
{
- struct thread_info *tp;
-
DEBUG ("stop recording");
record_btrace_auto_disable ();
- ALL_THREADS (tp)
+ for (thread_info *tp : all_non_exited_threads ())
if (tp->btrace.target != NULL)
btrace_disable (tp);
}
-/* The to_close method of target record-btrace. */
+/* The disconnect method of target record-btrace. */
-static void
-record_btrace_close (void)
+void
+record_btrace_target::disconnect (const char *args,
+ int from_tty)
+{
+ struct target_ops *beneath = this->beneath ();
+
+ /* Do not stop recording, just clean up GDB side. */
+ unpush_target (this);
+
+ /* Forward disconnect. */
+ beneath->disconnect (args, from_tty);
+}
+
+/* The close method of target record-btrace. */
+
+void
+record_btrace_target::close ()
{
+ if (record_btrace_async_inferior_event_handler != NULL)
+ delete_async_event_handler (&record_btrace_async_inferior_event_handler);
+
/* Make sure automatic recording gets disabled even if we did not stop
recording before closing the record-btrace target. */
record_btrace_auto_disable ();
- /* We already stopped recording. */
+ /* We should have already stopped recording.
+ Tear down btrace in case we have not. */
+ for (thread_info *tp : all_non_exited_threads ())
+ btrace_teardown (tp);
+}
+
+/* The async method of target record-btrace. */
+
+void
+record_btrace_target::async (int enable)
+{
+ if (enable)
+ mark_async_event_handler (record_btrace_async_inferior_event_handler);
+ else
+ clear_async_event_handler (record_btrace_async_inferior_event_handler);
+
+ this->beneath ()->async (enable);
+}
+
+/* Adjusts the size and returns a human readable size suffix. */
+
+static const char *
+record_btrace_adjust_size (unsigned int *size)
+{
+ unsigned int sz;
+
+ sz = *size;
+
+ if ((sz & ((1u << 30) - 1)) == 0)
+ {
+ *size = sz >> 30;
+ return "GB";
+ }
+ else if ((sz & ((1u << 20) - 1)) == 0)
+ {
+ *size = sz >> 20;
+ return "MB";
+ }
+ else if ((sz & ((1u << 10) - 1)) == 0)
+ {
+ *size = sz >> 10;
+ return "kB";
+ }
+ else
+ return "";
+}
+
+/* Print a BTS configuration. */
+
+static void
+record_btrace_print_bts_conf (const struct btrace_config_bts *conf)
+{
+ const char *suffix;
+ unsigned int size;
+
+ size = conf->size;
+ if (size > 0)
+ {
+ suffix = record_btrace_adjust_size (&size);
+ printf_unfiltered (_("Buffer size: %u%s.\n"), size, suffix);
+ }
+}
+
+/* Print an Intel Processor Trace configuration. */
+
+static void
+record_btrace_print_pt_conf (const struct btrace_config_pt *conf)
+{
+ const char *suffix;
+ unsigned int size;
+
+ size = conf->size;
+ if (size > 0)
+ {
+ suffix = record_btrace_adjust_size (&size);
+ printf_unfiltered (_("Buffer size: %u%s.\n"), size, suffix);
+ }
}
-/* The to_info_record method of target record-btrace. */
+/* Print a branch tracing configuration. */
static void
-record_btrace_info (void)
+record_btrace_print_conf (const struct btrace_config *conf)
+{
+ printf_unfiltered (_("Recording format: %s.\n"),
+ btrace_format_string (conf->format));
+
+ switch (conf->format)
+ {
+ case BTRACE_FORMAT_NONE:
+ return;
+
+ case BTRACE_FORMAT_BTS:
+ record_btrace_print_bts_conf (&conf->bts);
+ return;
+
+ case BTRACE_FORMAT_PT:
+ record_btrace_print_pt_conf (&conf->pt);
+ return;
+ }
+
+ internal_error (__FILE__, __LINE__, _("Unkown branch trace format."));
+}
+
+/* The info_record method of target record-btrace. */
+
+void
+record_btrace_target::info_record ()
{
struct btrace_thread_info *btinfo;
+ const struct btrace_config *conf;
struct thread_info *tp;
- unsigned int insns, calls;
+ unsigned int insns, calls, gaps;
DEBUG ("info");
if (tp == NULL)
error (_("No thread."));
- btrace_fetch (tp);
+ validate_registers_access ();
+
+ btinfo = &tp->btrace;
+
+ conf = ::btrace_conf (btinfo);
+ if (conf != NULL)
+ record_btrace_print_conf (conf);
+
+ btrace_fetch (tp, record_btrace_get_cpu ());
insns = 0;
calls = 0;
+ gaps = 0;
- btinfo = &tp->btrace;
- if (btinfo->begin != NULL)
+ if (!btrace_is_empty (tp))
{
struct btrace_call_iterator call;
struct btrace_insn_iterator insn;
calls = btrace_call_number (&call);
btrace_insn_end (&insn, btinfo);
- btrace_insn_prev (&insn, 1);
insns = btrace_insn_number (&insn);
+
+ /* If the last instruction is not a gap, it is the current instruction
+ that is not actually part of the record. */
+ if (btrace_insn_get (&insn) != NULL)
+ insns -= 1;
+
+ gaps = btinfo->ngaps;
+ }
+
+ printf_unfiltered (_("Recorded %u instructions in %u functions (%u gaps) "
+ "for thread %s (%s).\n"), insns, calls, gaps,
+ print_thread_id (tp),
+ target_pid_to_str (tp->ptid).c_str ());
+
+ if (btrace_is_replaying (tp))
+ printf_unfiltered (_("Replay in progress. At instruction %u.\n"),
+ btrace_insn_number (btinfo->replay));
+}
+
+/* Print a decode error. */
+
+static void
+btrace_ui_out_decode_error (struct ui_out *uiout, int errcode,
+ enum btrace_format format)
+{
+ const char *errstr = btrace_decode_error (format, errcode);
+
+ uiout->text (_("["));
+ /* ERRCODE > 0 indicates notifications on BTRACE_FORMAT_PT. */
+ if (!(format == BTRACE_FORMAT_PT && errcode > 0))
+ {
+ uiout->text (_("decode error ("));
+ uiout->field_signed ("errcode", errcode);
+ uiout->text (_("): "));
+ }
+ uiout->text (errstr);
+ uiout->text (_("]\n"));
+}
+
+/* A range of source lines. */
+
+struct btrace_line_range
+{
+ /* The symtab this line is from. */
+ struct symtab *symtab;
+
+ /* The first line (inclusive). */
+ int begin;
+
+ /* The last line (exclusive). */
+ int end;
+};
+
+/* Construct a line range. */
+
+static struct btrace_line_range
+btrace_mk_line_range (struct symtab *symtab, int begin, int end)
+{
+ struct btrace_line_range range;
+
+ range.symtab = symtab;
+ range.begin = begin;
+ range.end = end;
+
+ return range;
+}
+
+/* Add a line to a line range. */
+
+static struct btrace_line_range
+btrace_line_range_add (struct btrace_line_range range, int line)
+{
+ if (range.end <= range.begin)
+ {
+ /* This is the first entry. */
+ range.begin = line;
+ range.end = line + 1;
}
+ else if (line < range.begin)
+ range.begin = line;
+ else if (range.end < line)
+ range.end = line;
- printf_unfiltered (_("Recorded %u instructions in %u functions for thread "
- "%d (%s).\n"), insns, calls, tp->num,
- target_pid_to_str (tp->ptid));
+ return range;
}
-/* Print an unsigned int. */
+/* Return non-zero if RANGE is empty, zero otherwise. */
+
+static int
+btrace_line_range_is_empty (struct btrace_line_range range)
+{
+ return range.end <= range.begin;
+}
+
+/* Return non-zero if LHS contains RHS, zero otherwise. */
+
+static int
+btrace_line_range_contains_range (struct btrace_line_range lhs,
+ struct btrace_line_range rhs)
+{
+ return ((lhs.symtab == rhs.symtab)
+ && (lhs.begin <= rhs.begin)
+ && (rhs.end <= lhs.end));
+}
+
+/* Find the line range associated with PC. */
+
+static struct btrace_line_range
+btrace_find_line_range (CORE_ADDR pc)
+{
+ struct btrace_line_range range;
+ struct linetable_entry *lines;
+ struct linetable *ltable;
+ struct symtab *symtab;
+ int nlines, i;
+
+ symtab = find_pc_line_symtab (pc);
+ if (symtab == NULL)
+ return btrace_mk_line_range (NULL, 0, 0);
+
+ ltable = SYMTAB_LINETABLE (symtab);
+ if (ltable == NULL)
+ return btrace_mk_line_range (symtab, 0, 0);
+
+ nlines = ltable->nitems;
+ lines = ltable->item;
+ if (nlines <= 0)
+ return btrace_mk_line_range (symtab, 0, 0);
+
+ range = btrace_mk_line_range (symtab, 0, 0);
+ for (i = 0; i < nlines - 1; i++)
+ {
+ if ((lines[i].pc == pc) && (lines[i].line != 0))
+ range = btrace_line_range_add (range, lines[i].line);
+ }
+
+ return range;
+}
+
+/* Print source lines in LINES to UIOUT.
+
+ UI_ITEM_CHAIN is a cleanup chain for the last source line and the
+ instructions corresponding to that source line. When printing a new source
+ line, we do the cleanups for the open chain and open a new cleanup chain for
+ the new source line. If the source line range in LINES is not empty, this
+ function will leave the cleanup chain for the last printed source line open
+ so instructions can be added to it. */
static void
-ui_out_field_uint (struct ui_out *uiout, const char *fld, unsigned int val)
+btrace_print_lines (struct btrace_line_range lines, struct ui_out *uiout,
+ gdb::optional<ui_out_emit_tuple> *src_and_asm_tuple,
+ gdb::optional<ui_out_emit_list> *asm_list,
+ gdb_disassembly_flags flags)
{
- ui_out_field_fmt (uiout, fld, "%u", val);
+ print_source_lines_flags psl_flags;
+
+ if (flags & DISASSEMBLY_FILENAME)
+ psl_flags |= PRINT_SOURCE_LINES_FILENAME;
+
+ for (int line = lines.begin; line < lines.end; ++line)
+ {
+ asm_list->reset ();
+
+ src_and_asm_tuple->emplace (uiout, "src_and_asm_line");
+
+ print_source_lines (lines.symtab, line, line + 1, psl_flags);
+
+ asm_list->emplace (uiout, "line_asm_insn");
+ }
}
/* Disassemble a section of the recorded instruction trace. */
static void
btrace_insn_history (struct ui_out *uiout,
+ const struct btrace_thread_info *btinfo,
const struct btrace_insn_iterator *begin,
- const struct btrace_insn_iterator *end, int flags)
+ const struct btrace_insn_iterator *end,
+ gdb_disassembly_flags flags)
{
- struct gdbarch *gdbarch;
- struct btrace_insn_iterator it;
+ DEBUG ("itrace (0x%x): [%u; %u)", (unsigned) flags,
+ btrace_insn_number (begin), btrace_insn_number (end));
+
+ flags |= DISASSEMBLY_SPECULATIVE;
+
+ struct gdbarch *gdbarch = target_gdbarch ();
+ btrace_line_range last_lines = btrace_mk_line_range (NULL, 0, 0);
- DEBUG ("itrace (0x%x): [%u; %u)", flags, btrace_insn_number (begin),
- btrace_insn_number (end));
+ ui_out_emit_list list_emitter (uiout, "asm_insns");
- gdbarch = target_gdbarch ();
+ gdb::optional<ui_out_emit_tuple> src_and_asm_tuple;
+ gdb::optional<ui_out_emit_list> asm_list;
- for (it = *begin; btrace_insn_cmp (&it, end) != 0; btrace_insn_next (&it, 1))
+ gdb_pretty_print_disassembler disasm (gdbarch, uiout);
+
+ for (btrace_insn_iterator it = *begin; btrace_insn_cmp (&it, end) != 0;
+ btrace_insn_next (&it, 1))
{
const struct btrace_insn *insn;
insn = btrace_insn_get (&it);
- /* Print the instruction index. */
- ui_out_field_uint (uiout, "index", btrace_insn_number (&it));
- ui_out_text (uiout, "\t");
+ /* A NULL instruction indicates a gap in the trace. */
+ if (insn == NULL)
+ {
+ const struct btrace_config *conf;
+
+ conf = btrace_conf (btinfo);
+
+ /* We have trace so we must have a configuration. */
+ gdb_assert (conf != NULL);
- /* Disassembly with '/m' flag may not produce the expected result.
- See PR gdb/11833. */
- gdb_disassembly (gdbarch, uiout, NULL, flags, 1, insn->pc, insn->pc + 1);
+ uiout->field_fmt ("insn-number", "%u",
+ btrace_insn_number (&it));
+ uiout->text ("\t");
+
+ btrace_ui_out_decode_error (uiout, btrace_insn_get_error (&it),
+ conf->format);
+ }
+ else
+ {
+ struct disasm_insn dinsn;
+
+ if ((flags & DISASSEMBLY_SOURCE) != 0)
+ {
+ struct btrace_line_range lines;
+
+ lines = btrace_find_line_range (insn->pc);
+ if (!btrace_line_range_is_empty (lines)
+ && !btrace_line_range_contains_range (last_lines, lines))
+ {
+ btrace_print_lines (lines, uiout, &src_and_asm_tuple, &asm_list,
+ flags);
+ last_lines = lines;
+ }
+ else if (!src_and_asm_tuple.has_value ())
+ {
+ gdb_assert (!asm_list.has_value ());
+
+ src_and_asm_tuple.emplace (uiout, "src_and_asm_line");
+
+ /* No source information. */
+ asm_list.emplace (uiout, "line_asm_insn");
+ }
+
+ gdb_assert (src_and_asm_tuple.has_value ());
+ gdb_assert (asm_list.has_value ());
+ }
+
+ memset (&dinsn, 0, sizeof (dinsn));
+ dinsn.number = btrace_insn_number (&it);
+ dinsn.addr = insn->pc;
+
+ if ((insn->flags & BTRACE_INSN_FLAG_SPECULATIVE) != 0)
+ dinsn.is_speculative = 1;
+
+ disasm.pretty_print_insn (&dinsn, flags);
+ }
}
}
-/* The to_insn_history method of target record-btrace. */
+/* The insn_history method of target record-btrace. */
-static void
-record_btrace_insn_history (int size, int flags)
+void
+record_btrace_target::insn_history (int size, gdb_disassembly_flags flags)
{
struct btrace_thread_info *btinfo;
struct btrace_insn_history *history;
struct btrace_insn_iterator begin, end;
- struct cleanup *uiout_cleanup;
struct ui_out *uiout;
unsigned int context, covered;
uiout = current_uiout;
- uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout,
- "insn history");
+ ui_out_emit_tuple tuple_emitter (uiout, "insn history");
context = abs (size);
if (context == 0)
error (_("Bad record instruction-history-size."));
history = btinfo->insn_history;
if (history == NULL)
{
- /* No matter the direction, we start with the tail of the trace. */
- btrace_insn_end (&begin, btinfo);
- end = begin;
+ struct btrace_insn_iterator *replay;
- DEBUG ("insn-history (0x%x): %d", flags, size);
+ DEBUG ("insn-history (0x%x): %d", (unsigned) flags, size);
- covered = btrace_insn_prev (&begin, context);
- }
- else
- {
- begin = history->begin;
- end = history->end;
-
- DEBUG ("insn-history (0x%x): %d, prev: [%u; %u)", flags, size,
- btrace_insn_number (&begin), btrace_insn_number (&end));
+ /* If we're replaying, we start at the replay position. Otherwise, we
+ start at the tail of the trace. */
+ replay = btinfo->replay;
+ if (replay != NULL)
+ begin = *replay;
+ else
+ btrace_insn_end (&begin, btinfo);
+
+ /* We start from here and expand in the requested direction. Then we
+ expand in the other direction, as well, to fill up any remaining
+ context. */
+ end = begin;
+ if (size < 0)
+ {
+ /* We want the current position covered, as well. */
+ covered = btrace_insn_next (&end, 1);
+ covered += btrace_insn_prev (&begin, context - covered);
+ covered += btrace_insn_next (&end, context - covered);
+ }
+ else
+ {
+ covered = btrace_insn_next (&end, context);
+ covered += btrace_insn_prev (&begin, context - covered);
+ }
+ }
+ else
+ {
+ begin = history->begin;
+ end = history->end;
+
+ DEBUG ("insn-history (0x%x): %d, prev: [%u; %u)", (unsigned) flags, size,
+ btrace_insn_number (&begin), btrace_insn_number (&end));
if (size < 0)
{
}
if (covered > 0)
- btrace_insn_history (uiout, &begin, &end, flags);
+ btrace_insn_history (uiout, btinfo, &begin, &end, flags);
else
{
if (size < 0)
}
btrace_set_insn_history (btinfo, &begin, &end);
- do_cleanups (uiout_cleanup);
}
-/* The to_insn_history_range method of target record-btrace. */
+/* The insn_history_range method of target record-btrace. */
-static void
-record_btrace_insn_history_range (ULONGEST from, ULONGEST to, int flags)
+void
+record_btrace_target::insn_history_range (ULONGEST from, ULONGEST to,
+ gdb_disassembly_flags flags)
{
struct btrace_thread_info *btinfo;
- struct btrace_insn_history *history;
struct btrace_insn_iterator begin, end;
- struct cleanup *uiout_cleanup;
struct ui_out *uiout;
unsigned int low, high;
int found;
uiout = current_uiout;
- uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout,
- "insn history");
+ ui_out_emit_tuple tuple_emitter (uiout, "insn history");
low = from;
high = to;
- DEBUG ("insn-history (0x%x): [%u; %u)", flags, low, high);
+ DEBUG ("insn-history (0x%x): [%u; %u)", (unsigned) flags, low, high);
/* Check for wrap-arounds. */
if (low != from || high != to)
btrace_insn_next (&end, 1);
}
- btrace_insn_history (uiout, &begin, &end, flags);
+ btrace_insn_history (uiout, btinfo, &begin, &end, flags);
btrace_set_insn_history (btinfo, &begin, &end);
-
- do_cleanups (uiout_cleanup);
}
-/* The to_insn_history_from method of target record-btrace. */
+/* The insn_history_from method of target record-btrace. */
-static void
-record_btrace_insn_history_from (ULONGEST from, int size, int flags)
+void
+record_btrace_target::insn_history_from (ULONGEST from, int size,
+ gdb_disassembly_flags flags)
{
ULONGEST begin, end, context;
end = ULONGEST_MAX;
}
- record_btrace_insn_history_range (begin, end, flags);
+ insn_history_range (begin, end, flags);
}
/* Print the instruction number range for a function call history line. */
{
unsigned int begin, end, size;
- size = VEC_length (btrace_insn_s, bfun->insn);
+ size = bfun->insn.size ();
gdb_assert (size > 0);
begin = bfun->insn_offset;
end = begin + size - 1;
- ui_out_field_uint (uiout, "insn begin", begin);
- ui_out_text (uiout, ",");
- ui_out_field_uint (uiout, "insn end", end);
+ uiout->field_unsigned ("insn begin", begin);
+ uiout->text (",");
+ uiout->field_unsigned ("insn end", end);
+}
+
+/* Compute the lowest and highest source line for the instructions in BFUN
+ and return them in PBEGIN and PEND.
+ Ignore instructions that can't be mapped to BFUN, e.g. instructions that
+ result from inlining or macro expansion. */
+
+static void
+btrace_compute_src_line_range (const struct btrace_function *bfun,
+ int *pbegin, int *pend)
+{
+ struct symtab *symtab;
+ struct symbol *sym;
+ int begin, end;
+
+ begin = INT_MAX;
+ end = INT_MIN;
+
+ sym = bfun->sym;
+ if (sym == NULL)
+ goto out;
+
+ symtab = symbol_symtab (sym);
+
+ for (const btrace_insn &insn : bfun->insn)
+ {
+ struct symtab_and_line sal;
+
+ sal = find_pc_line (insn.pc, 0);
+ if (sal.symtab != symtab || sal.line == 0)
+ continue;
+
+ begin = std::min (begin, sal.line);
+ end = std::max (end, sal.line);
+ }
+
+ out:
+ *pbegin = begin;
+ *pend = end;
}
/* Print the source line information for a function call history line. */
if (sym == NULL)
return;
- ui_out_field_string (uiout, "file",
- symtab_to_filename_for_display (sym->symtab));
-
- begin = bfun->lbegin;
- end = bfun->lend;
+ uiout->field_string ("file",
+ symtab_to_filename_for_display (symbol_symtab (sym)),
+ ui_out_style_kind::FILE);
+ btrace_compute_src_line_range (bfun, &begin, &end);
if (end < begin)
return;
- ui_out_text (uiout, ":");
- ui_out_field_int (uiout, "min line", begin);
+ uiout->text (":");
+ uiout->field_signed ("min line", begin);
if (end == begin)
return;
- ui_out_text (uiout, ",");
- ui_out_field_int (uiout, "max line", end);
+ uiout->text (",");
+ uiout->field_signed ("max line", end);
+}
+
+/* Get the name of a branch trace function. */
+
+static const char *
+btrace_get_bfun_name (const struct btrace_function *bfun)
+{
+ struct minimal_symbol *msym;
+ struct symbol *sym;
+
+ if (bfun == NULL)
+ return "??";
+
+ msym = bfun->msym;
+ sym = bfun->sym;
+
+ if (sym != NULL)
+ return SYMBOL_PRINT_NAME (sym);
+ else if (msym != NULL)
+ return MSYMBOL_PRINT_NAME (msym);
+ else
+ return "??";
}
/* Disassemble a section of the recorded function trace. */
const struct btrace_thread_info *btinfo,
const struct btrace_call_iterator *begin,
const struct btrace_call_iterator *end,
- enum record_print_flag flags)
+ int int_flags)
{
struct btrace_call_iterator it;
+ record_print_flags flags = (enum record_print_flag) int_flags;
- DEBUG ("ftrace (0x%x): [%u; %u)", flags, btrace_call_number (begin),
+ DEBUG ("ftrace (0x%x): [%u; %u)", int_flags, btrace_call_number (begin),
btrace_call_number (end));
for (it = *begin; btrace_call_cmp (&it, end) < 0; btrace_call_next (&it, 1))
struct symbol *sym;
bfun = btrace_call_get (&it);
- msym = bfun->msym;
sym = bfun->sym;
+ msym = bfun->msym;
/* Print the function index. */
- ui_out_field_uint (uiout, "index", bfun->number);
- ui_out_text (uiout, "\t");
+ uiout->field_unsigned ("index", bfun->number);
+ uiout->text ("\t");
+
+ /* Indicate gaps in the trace. */
+ if (bfun->errcode != 0)
+ {
+ const struct btrace_config *conf;
+
+ conf = btrace_conf (btinfo);
+
+ /* We have trace so we must have a configuration. */
+ gdb_assert (conf != NULL);
+
+ btrace_ui_out_decode_error (uiout, bfun->errcode, conf->format);
+
+ continue;
+ }
if ((flags & RECORD_PRINT_INDENT_CALLS) != 0)
{
int level = bfun->level + btinfo->level, i;
for (i = 0; i < level; ++i)
- ui_out_text (uiout, " ");
+ uiout->text (" ");
}
if (sym != NULL)
- ui_out_field_string (uiout, "function", SYMBOL_PRINT_NAME (sym));
+ uiout->field_string ("function", SYMBOL_PRINT_NAME (sym),
+ ui_out_style_kind::FUNCTION);
else if (msym != NULL)
- ui_out_field_string (uiout, "function", SYMBOL_PRINT_NAME (msym));
- else if (!ui_out_is_mi_like_p (uiout))
- ui_out_field_string (uiout, "function", "??");
+ uiout->field_string ("function", MSYMBOL_PRINT_NAME (msym),
+ ui_out_style_kind::FUNCTION);
+ else if (!uiout->is_mi_like_p ())
+ uiout->field_string ("function", "??",
+ ui_out_style_kind::FUNCTION);
if ((flags & RECORD_PRINT_INSN_RANGE) != 0)
{
- ui_out_text (uiout, _("\tinst "));
+ uiout->text (_("\tinst "));
btrace_call_history_insn_range (uiout, bfun);
}
if ((flags & RECORD_PRINT_SRC_LINE) != 0)
{
- ui_out_text (uiout, _("\tat "));
+ uiout->text (_("\tat "));
btrace_call_history_src_line (uiout, bfun);
}
- ui_out_text (uiout, "\n");
+ uiout->text ("\n");
}
}
-/* The to_call_history method of target record-btrace. */
+/* The call_history method of target record-btrace. */
-static void
-record_btrace_call_history (int size, int flags)
+void
+record_btrace_target::call_history (int size, record_print_flags flags)
{
struct btrace_thread_info *btinfo;
struct btrace_call_history *history;
struct btrace_call_iterator begin, end;
- struct cleanup *uiout_cleanup;
struct ui_out *uiout;
unsigned int context, covered;
uiout = current_uiout;
- uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout,
- "insn history");
+ ui_out_emit_tuple tuple_emitter (uiout, "insn history");
context = abs (size);
if (context == 0)
error (_("Bad record function-call-history-size."));
history = btinfo->call_history;
if (history == NULL)
{
- /* No matter the direction, we start with the tail of the trace. */
- btrace_call_end (&begin, btinfo);
- end = begin;
+ struct btrace_insn_iterator *replay;
+
+ DEBUG ("call-history (0x%x): %d", (int) flags, size);
- DEBUG ("call-history (0x%x): %d", flags, size);
+ /* If we're replaying, we start at the replay position. Otherwise, we
+ start at the tail of the trace. */
+ replay = btinfo->replay;
+ if (replay != NULL)
+ {
+ begin.btinfo = btinfo;
+ begin.index = replay->call_index;
+ }
+ else
+ btrace_call_end (&begin, btinfo);
- covered = btrace_call_prev (&begin, context);
+ /* We start from here and expand in the requested direction. Then we
+ expand in the other direction, as well, to fill up any remaining
+ context. */
+ end = begin;
+ if (size < 0)
+ {
+ /* We want the current position covered, as well. */
+ covered = btrace_call_next (&end, 1);
+ covered += btrace_call_prev (&begin, context - covered);
+ covered += btrace_call_next (&end, context - covered);
+ }
+ else
+ {
+ covered = btrace_call_next (&end, context);
+ covered += btrace_call_prev (&begin, context- covered);
+ }
}
else
{
begin = history->begin;
end = history->end;
- DEBUG ("call-history (0x%x): %d, prev: [%u; %u)", flags, size,
+ DEBUG ("call-history (0x%x): %d, prev: [%u; %u)", (int) flags, size,
btrace_call_number (&begin), btrace_call_number (&end));
if (size < 0)
}
btrace_set_call_history (btinfo, &begin, &end);
- do_cleanups (uiout_cleanup);
}
-/* The to_call_history_range method of target record-btrace. */
+/* The call_history_range method of target record-btrace. */
-static void
-record_btrace_call_history_range (ULONGEST from, ULONGEST to, int flags)
+void
+record_btrace_target::call_history_range (ULONGEST from, ULONGEST to,
+ record_print_flags flags)
{
struct btrace_thread_info *btinfo;
- struct btrace_call_history *history;
struct btrace_call_iterator begin, end;
- struct cleanup *uiout_cleanup;
struct ui_out *uiout;
unsigned int low, high;
int found;
uiout = current_uiout;
- uiout_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout,
- "func history");
+ ui_out_emit_tuple tuple_emitter (uiout, "func history");
low = from;
high = to;
- DEBUG ("call-history (0x%x): [%u; %u)", flags, low, high);
+ DEBUG ("call-history (0x%x): [%u; %u)", (int) flags, low, high);
/* Check for wrap-arounds. */
if (low != from || high != to)
btrace_call_history (uiout, btinfo, &begin, &end, flags);
btrace_set_call_history (btinfo, &begin, &end);
-
- do_cleanups (uiout_cleanup);
}
-/* The to_call_history_from method of target record-btrace. */
+/* The call_history_from method of target record-btrace. */
-static void
-record_btrace_call_history_from (ULONGEST from, int size, int flags)
+void
+record_btrace_target::call_history_from (ULONGEST from, int size,
+ record_print_flags flags)
{
ULONGEST begin, end, context;
end = ULONGEST_MAX;
}
- record_btrace_call_history_range (begin, end, flags);
+ call_history_range ( begin, end, flags);
}
-/* Initialize the record-btrace target ops. */
+/* The record_method method of target record-btrace. */
-static void
-init_record_btrace_ops (void)
-{
- struct target_ops *ops;
-
- ops = &record_btrace_ops;
- ops->to_shortname = "record-btrace";
- ops->to_longname = "Branch tracing target";
- ops->to_doc = "Collect control-flow trace and provide the execution history.";
- ops->to_open = record_btrace_open;
- ops->to_close = record_btrace_close;
- ops->to_detach = record_detach;
- ops->to_disconnect = record_disconnect;
- ops->to_mourn_inferior = record_mourn_inferior;
- ops->to_kill = record_kill;
- ops->to_create_inferior = find_default_create_inferior;
- ops->to_stop_recording = record_btrace_stop_recording;
- ops->to_info_record = record_btrace_info;
- ops->to_insn_history = record_btrace_insn_history;
- ops->to_insn_history_from = record_btrace_insn_history_from;
- ops->to_insn_history_range = record_btrace_insn_history_range;
- ops->to_call_history = record_btrace_call_history;
- ops->to_call_history_from = record_btrace_call_history_from;
- ops->to_call_history_range = record_btrace_call_history_range;
- ops->to_stratum = record_stratum;
- ops->to_magic = OPS_MAGIC;
+enum record_method
+record_btrace_target::record_method (ptid_t ptid)
+{
+ struct thread_info * const tp = find_thread_ptid (ptid);
+
+ if (tp == NULL)
+ error (_("No thread."));
+
+ if (tp->btrace.target == NULL)
+ return RECORD_METHOD_NONE;
+
+ return RECORD_METHOD_BTRACE;
}
-/* Alias for "target record". */
+/* The record_is_replaying method of target record-btrace. */
+
+bool
+record_btrace_target::record_is_replaying (ptid_t ptid)
+{
+ for (thread_info *tp : all_non_exited_threads (ptid))
+ if (btrace_is_replaying (tp))
+ return true;
+
+ return false;
+}
+
+/* The record_will_replay method of target record-btrace. */
+
+bool
+record_btrace_target::record_will_replay (ptid_t ptid, int dir)
+{
+ return dir == EXEC_REVERSE || record_is_replaying (ptid);
+}
+
+/* The xfer_partial method of target record-btrace. */
+
+enum target_xfer_status
+record_btrace_target::xfer_partial (enum target_object object,
+ const char *annex, gdb_byte *readbuf,
+ const gdb_byte *writebuf, ULONGEST offset,
+ ULONGEST len, ULONGEST *xfered_len)
+{
+ /* Filter out requests that don't make sense during replay. */
+ if (replay_memory_access == replay_memory_access_read_only
+ && !record_btrace_generating_corefile
+ && record_is_replaying (inferior_ptid))
+ {
+ switch (object)
+ {
+ case TARGET_OBJECT_MEMORY:
+ {
+ struct target_section *section;
+
+ /* We do not allow writing memory in general. */
+ if (writebuf != NULL)
+ {
+ *xfered_len = len;
+ return TARGET_XFER_UNAVAILABLE;
+ }
+
+ /* We allow reading readonly memory. */
+ section = target_section_by_addr (this, offset);
+ if (section != NULL)
+ {
+ /* Check if the section we found is readonly. */
+ if ((bfd_get_section_flags (section->the_bfd_section->owner,
+ section->the_bfd_section)
+ & SEC_READONLY) != 0)
+ {
+ /* Truncate the request to fit into this section. */
+ len = std::min (len, section->endaddr - offset);
+ break;
+ }
+ }
+
+ *xfered_len = len;
+ return TARGET_XFER_UNAVAILABLE;
+ }
+ }
+ }
+
+ /* Forward the request. */
+ return this->beneath ()->xfer_partial (object, annex, readbuf, writebuf,
+ offset, len, xfered_len);
+}
+
+/* The insert_breakpoint method of target record-btrace. */
+
+int
+record_btrace_target::insert_breakpoint (struct gdbarch *gdbarch,
+ struct bp_target_info *bp_tgt)
+{
+ const char *old;
+ int ret;
+
+ /* Inserting breakpoints requires accessing memory. Allow it for the
+ duration of this function. */
+ old = replay_memory_access;
+ replay_memory_access = replay_memory_access_read_write;
+
+ ret = 0;
+ try
+ {
+ ret = this->beneath ()->insert_breakpoint (gdbarch, bp_tgt);
+ }
+ catch (const gdb_exception &except)
+ {
+ replay_memory_access = old;
+ throw;
+ }
+ replay_memory_access = old;
+
+ return ret;
+}
+
+/* The remove_breakpoint method of target record-btrace. */
+
+int
+record_btrace_target::remove_breakpoint (struct gdbarch *gdbarch,
+ struct bp_target_info *bp_tgt,
+ enum remove_bp_reason reason)
+{
+ const char *old;
+ int ret;
+
+ /* Removing breakpoints requires accessing memory. Allow it for the
+ duration of this function. */
+ old = replay_memory_access;
+ replay_memory_access = replay_memory_access_read_write;
+
+ ret = 0;
+ try
+ {
+ ret = this->beneath ()->remove_breakpoint (gdbarch, bp_tgt, reason);
+ }
+ catch (const gdb_exception &except)
+ {
+ replay_memory_access = old;
+ throw;
+ }
+ replay_memory_access = old;
+
+ return ret;
+}
+
+/* The fetch_registers method of target record-btrace. */
+
+void
+record_btrace_target::fetch_registers (struct regcache *regcache, int regno)
+{
+ struct btrace_insn_iterator *replay;
+ struct thread_info *tp;
+
+ tp = find_thread_ptid (regcache->ptid ());
+ gdb_assert (tp != NULL);
+
+ replay = tp->btrace.replay;
+ if (replay != NULL && !record_btrace_generating_corefile)
+ {
+ const struct btrace_insn *insn;
+ struct gdbarch *gdbarch;
+ int pcreg;
+
+ gdbarch = regcache->arch ();
+ pcreg = gdbarch_pc_regnum (gdbarch);
+ if (pcreg < 0)
+ return;
+
+ /* We can only provide the PC register. */
+ if (regno >= 0 && regno != pcreg)
+ return;
+
+ insn = btrace_insn_get (replay);
+ gdb_assert (insn != NULL);
+
+ regcache->raw_supply (regno, &insn->pc);
+ }
+ else
+ this->beneath ()->fetch_registers (regcache, regno);
+}
+
+/* The store_registers method of target record-btrace. */
+
+void
+record_btrace_target::store_registers (struct regcache *regcache, int regno)
+{
+ if (!record_btrace_generating_corefile
+ && record_is_replaying (regcache->ptid ()))
+ error (_("Cannot write registers while replaying."));
+
+ gdb_assert (may_write_registers != 0);
+
+ this->beneath ()->store_registers (regcache, regno);
+}
+
+/* The prepare_to_store method of target record-btrace. */
+
+void
+record_btrace_target::prepare_to_store (struct regcache *regcache)
+{
+ if (!record_btrace_generating_corefile
+ && record_is_replaying (regcache->ptid ()))
+ return;
+
+ this->beneath ()->prepare_to_store (regcache);
+}
+
+/* The branch trace frame cache. */
+
+struct btrace_frame_cache
+{
+ /* The thread. */
+ struct thread_info *tp;
+
+ /* The frame info. */
+ struct frame_info *frame;
+
+ /* The branch trace function segment. */
+ const struct btrace_function *bfun;
+};
+
+/* A struct btrace_frame_cache hash table indexed by NEXT. */
+
+static htab_t bfcache;
+
+/* hash_f for htab_create_alloc of bfcache. */
+
+static hashval_t
+bfcache_hash (const void *arg)
+{
+ const struct btrace_frame_cache *cache
+ = (const struct btrace_frame_cache *) arg;
+
+ return htab_hash_pointer (cache->frame);
+}
+
+/* eq_f for htab_create_alloc of bfcache. */
+
+static int
+bfcache_eq (const void *arg1, const void *arg2)
+{
+ const struct btrace_frame_cache *cache1
+ = (const struct btrace_frame_cache *) arg1;
+ const struct btrace_frame_cache *cache2
+ = (const struct btrace_frame_cache *) arg2;
+
+ return cache1->frame == cache2->frame;
+}
+
+/* Create a new btrace frame cache. */
+
+static struct btrace_frame_cache *
+bfcache_new (struct frame_info *frame)
+{
+ struct btrace_frame_cache *cache;
+ void **slot;
+
+ cache = FRAME_OBSTACK_ZALLOC (struct btrace_frame_cache);
+ cache->frame = frame;
+
+ slot = htab_find_slot (bfcache, cache, INSERT);
+ gdb_assert (*slot == NULL);
+ *slot = cache;
+
+ return cache;
+}
+
+/* Extract the branch trace function from a branch trace frame. */
+
+static const struct btrace_function *
+btrace_get_frame_function (struct frame_info *frame)
+{
+ const struct btrace_frame_cache *cache;
+ struct btrace_frame_cache pattern;
+ void **slot;
+
+ pattern.frame = frame;
+
+ slot = htab_find_slot (bfcache, &pattern, NO_INSERT);
+ if (slot == NULL)
+ return NULL;
+
+ cache = (const struct btrace_frame_cache *) *slot;
+ return cache->bfun;
+}
+
+/* Implement stop_reason method for record_btrace_frame_unwind. */
+
+static enum unwind_stop_reason
+record_btrace_frame_unwind_stop_reason (struct frame_info *this_frame,
+ void **this_cache)
+{
+ const struct btrace_frame_cache *cache;
+ const struct btrace_function *bfun;
+
+ cache = (const struct btrace_frame_cache *) *this_cache;
+ bfun = cache->bfun;
+ gdb_assert (bfun != NULL);
+
+ if (bfun->up == 0)
+ return UNWIND_UNAVAILABLE;
+
+ return UNWIND_NO_REASON;
+}
+
+/* Implement this_id method for record_btrace_frame_unwind. */
static void
-cmd_record_btrace_start (char *args, int from_tty)
+record_btrace_frame_this_id (struct frame_info *this_frame, void **this_cache,
+ struct frame_id *this_id)
{
- if (args != NULL && *args != 0)
- error (_("Invalid argument."));
+ const struct btrace_frame_cache *cache;
+ const struct btrace_function *bfun;
+ struct btrace_call_iterator it;
+ CORE_ADDR code, special;
+
+ cache = (const struct btrace_frame_cache *) *this_cache;
+
+ bfun = cache->bfun;
+ gdb_assert (bfun != NULL);
+
+ while (btrace_find_call_by_number (&it, &cache->tp->btrace, bfun->prev) != 0)
+ bfun = btrace_call_get (&it);
+
+ code = get_frame_func (this_frame);
+ special = bfun->number;
+
+ *this_id = frame_id_build_unavailable_stack_special (code, special);
+
+ DEBUG ("[frame] %s id: (!stack, pc=%s, special=%s)",
+ btrace_get_bfun_name (cache->bfun),
+ core_addr_to_string_nz (this_id->code_addr),
+ core_addr_to_string_nz (this_id->special_addr));
+}
+
+/* Implement prev_register method for record_btrace_frame_unwind. */
+
+static struct value *
+record_btrace_frame_prev_register (struct frame_info *this_frame,
+ void **this_cache,
+ int regnum)
+{
+ const struct btrace_frame_cache *cache;
+ const struct btrace_function *bfun, *caller;
+ struct btrace_call_iterator it;
+ struct gdbarch *gdbarch;
+ CORE_ADDR pc;
+ int pcreg;
+
+ gdbarch = get_frame_arch (this_frame);
+ pcreg = gdbarch_pc_regnum (gdbarch);
+ if (pcreg < 0 || regnum != pcreg)
+ throw_error (NOT_AVAILABLE_ERROR,
+ _("Registers are not available in btrace record history"));
+
+ cache = (const struct btrace_frame_cache *) *this_cache;
+ bfun = cache->bfun;
+ gdb_assert (bfun != NULL);
+
+ if (btrace_find_call_by_number (&it, &cache->tp->btrace, bfun->up) == 0)
+ throw_error (NOT_AVAILABLE_ERROR,
+ _("No caller in btrace record history"));
+
+ caller = btrace_call_get (&it);
+
+ if ((bfun->flags & BFUN_UP_LINKS_TO_RET) != 0)
+ pc = caller->insn.front ().pc;
+ else
+ {
+ pc = caller->insn.back ().pc;
+ pc += gdb_insn_length (gdbarch, pc);
+ }
+
+ DEBUG ("[frame] unwound PC in %s on level %d: %s",
+ btrace_get_bfun_name (bfun), bfun->level,
+ core_addr_to_string_nz (pc));
+
+ return frame_unwind_got_address (this_frame, regnum, pc);
+}
+
+/* Implement sniffer method for record_btrace_frame_unwind. */
+
+static int
+record_btrace_frame_sniffer (const struct frame_unwind *self,
+ struct frame_info *this_frame,
+ void **this_cache)
+{
+ const struct btrace_function *bfun;
+ struct btrace_frame_cache *cache;
+ struct thread_info *tp;
+ struct frame_info *next;
+
+ /* THIS_FRAME does not contain a reference to its thread. */
+ tp = inferior_thread ();
+
+ bfun = NULL;
+ next = get_next_frame (this_frame);
+ if (next == NULL)
+ {
+ const struct btrace_insn_iterator *replay;
+
+ replay = tp->btrace.replay;
+ if (replay != NULL)
+ bfun = &replay->btinfo->functions[replay->call_index];
+ }
+ else
+ {
+ const struct btrace_function *callee;
+ struct btrace_call_iterator it;
+
+ callee = btrace_get_frame_function (next);
+ if (callee == NULL || (callee->flags & BFUN_UP_LINKS_TO_TAILCALL) != 0)
+ return 0;
+
+ if (btrace_find_call_by_number (&it, &tp->btrace, callee->up) == 0)
+ return 0;
+
+ bfun = btrace_call_get (&it);
+ }
+
+ if (bfun == NULL)
+ return 0;
+
+ DEBUG ("[frame] sniffed frame for %s on level %d",
+ btrace_get_bfun_name (bfun), bfun->level);
+
+ /* This is our frame. Initialize the frame cache. */
+ cache = bfcache_new (this_frame);
+ cache->tp = tp;
+ cache->bfun = bfun;
- execute_command ("target record-btrace", from_tty);
+ *this_cache = cache;
+ return 1;
}
-void _initialize_record_btrace (void);
+/* Implement sniffer method for record_btrace_tailcall_frame_unwind. */
+
+static int
+record_btrace_tailcall_frame_sniffer (const struct frame_unwind *self,
+ struct frame_info *this_frame,
+ void **this_cache)
+{
+ const struct btrace_function *bfun, *callee;
+ struct btrace_frame_cache *cache;
+ struct btrace_call_iterator it;
+ struct frame_info *next;
+ struct thread_info *tinfo;
+
+ next = get_next_frame (this_frame);
+ if (next == NULL)
+ return 0;
+
+ callee = btrace_get_frame_function (next);
+ if (callee == NULL)
+ return 0;
+
+ if ((callee->flags & BFUN_UP_LINKS_TO_TAILCALL) == 0)
+ return 0;
+
+ tinfo = inferior_thread ();
+ if (btrace_find_call_by_number (&it, &tinfo->btrace, callee->up) == 0)
+ return 0;
+
+ bfun = btrace_call_get (&it);
+
+ DEBUG ("[frame] sniffed tailcall frame for %s on level %d",
+ btrace_get_bfun_name (bfun), bfun->level);
+
+ /* This is our frame. Initialize the frame cache. */
+ cache = bfcache_new (this_frame);
+ cache->tp = tinfo;
+ cache->bfun = bfun;
+
+ *this_cache = cache;
+ return 1;
+}
+
+static void
+record_btrace_frame_dealloc_cache (struct frame_info *self, void *this_cache)
+{
+ struct btrace_frame_cache *cache;
+ void **slot;
+
+ cache = (struct btrace_frame_cache *) this_cache;
+
+ slot = htab_find_slot (bfcache, cache, NO_INSERT);
+ gdb_assert (slot != NULL);
+
+ htab_remove_elt (bfcache, cache);
+}
+
+/* btrace recording does not store previous memory content, neither the stack
+ frames content. Any unwinding would return errorneous results as the stack
+ contents no longer matches the changed PC value restored from history.
+ Therefore this unwinder reports any possibly unwound registers as
+ <unavailable>. */
+
+const struct frame_unwind record_btrace_frame_unwind =
+{
+ NORMAL_FRAME,
+ record_btrace_frame_unwind_stop_reason,
+ record_btrace_frame_this_id,
+ record_btrace_frame_prev_register,
+ NULL,
+ record_btrace_frame_sniffer,
+ record_btrace_frame_dealloc_cache
+};
+
+const struct frame_unwind record_btrace_tailcall_frame_unwind =
+{
+ TAILCALL_FRAME,
+ record_btrace_frame_unwind_stop_reason,
+ record_btrace_frame_this_id,
+ record_btrace_frame_prev_register,
+ NULL,
+ record_btrace_tailcall_frame_sniffer,
+ record_btrace_frame_dealloc_cache
+};
+
+/* Implement the get_unwinder method. */
+
+const struct frame_unwind *
+record_btrace_target::get_unwinder ()
+{
+ return &record_btrace_frame_unwind;
+}
+
+/* Implement the get_tailcall_unwinder method. */
+
+const struct frame_unwind *
+record_btrace_target::get_tailcall_unwinder ()
+{
+ return &record_btrace_tailcall_frame_unwind;
+}
+
+/* Return a human-readable string for FLAG. */
+
+static const char *
+btrace_thread_flag_to_str (enum btrace_thread_flag flag)
+{
+ switch (flag)
+ {
+ case BTHR_STEP:
+ return "step";
+
+ case BTHR_RSTEP:
+ return "reverse-step";
+
+ case BTHR_CONT:
+ return "cont";
+
+ case BTHR_RCONT:
+ return "reverse-cont";
+
+ case BTHR_STOP:
+ return "stop";
+ }
+
+ return "<invalid>";
+}
+
+/* Indicate that TP should be resumed according to FLAG. */
+
+static void
+record_btrace_resume_thread (struct thread_info *tp,
+ enum btrace_thread_flag flag)
+{
+ struct btrace_thread_info *btinfo;
+
+ DEBUG ("resuming thread %s (%s): %x (%s)", print_thread_id (tp),
+ target_pid_to_str (tp->ptid).c_str (), flag,
+ btrace_thread_flag_to_str (flag));
+
+ btinfo = &tp->btrace;
+
+ /* Fetch the latest branch trace. */
+ btrace_fetch (tp, record_btrace_get_cpu ());
+
+ /* A resume request overwrites a preceding resume or stop request. */
+ btinfo->flags &= ~(BTHR_MOVE | BTHR_STOP);
+ btinfo->flags |= flag;
+}
+
+/* Get the current frame for TP. */
+
+static struct frame_id
+get_thread_current_frame_id (struct thread_info *tp)
+{
+ struct frame_id id;
+ int executing;
+
+ /* Set current thread, which is implicitly used by
+ get_current_frame. */
+ scoped_restore_current_thread restore_thread;
+
+ switch_to_thread (tp);
+
+ /* Clear the executing flag to allow changes to the current frame.
+ We are not actually running, yet. We just started a reverse execution
+ command or a record goto command.
+ For the latter, EXECUTING is false and this has no effect.
+ For the former, EXECUTING is true and we're in wait, about to
+ move the thread. Since we need to recompute the stack, we temporarily
+ set EXECUTING to flase. */
+ executing = tp->executing;
+ set_executing (inferior_ptid, false);
+
+ id = null_frame_id;
+ try
+ {
+ id = get_frame_id (get_current_frame ());
+ }
+ catch (const gdb_exception &except)
+ {
+ /* Restore the previous execution state. */
+ set_executing (inferior_ptid, executing);
+
+ throw;
+ }
+
+ /* Restore the previous execution state. */
+ set_executing (inferior_ptid, executing);
+
+ return id;
+}
+
+/* Start replaying a thread. */
+
+static struct btrace_insn_iterator *
+record_btrace_start_replaying (struct thread_info *tp)
+{
+ struct btrace_insn_iterator *replay;
+ struct btrace_thread_info *btinfo;
+
+ btinfo = &tp->btrace;
+ replay = NULL;
+
+ /* We can't start replaying without trace. */
+ if (btinfo->functions.empty ())
+ return NULL;
+
+ /* GDB stores the current frame_id when stepping in order to detects steps
+ into subroutines.
+ Since frames are computed differently when we're replaying, we need to
+ recompute those stored frames and fix them up so we can still detect
+ subroutines after we started replaying. */
+ try
+ {
+ struct frame_id frame_id;
+ int upd_step_frame_id, upd_step_stack_frame_id;
+
+ /* The current frame without replaying - computed via normal unwind. */
+ frame_id = get_thread_current_frame_id (tp);
+
+ /* Check if we need to update any stepping-related frame id's. */
+ upd_step_frame_id = frame_id_eq (frame_id,
+ tp->control.step_frame_id);
+ upd_step_stack_frame_id = frame_id_eq (frame_id,
+ tp->control.step_stack_frame_id);
+
+ /* We start replaying at the end of the branch trace. This corresponds
+ to the current instruction. */
+ replay = XNEW (struct btrace_insn_iterator);
+ btrace_insn_end (replay, btinfo);
+
+ /* Skip gaps at the end of the trace. */
+ while (btrace_insn_get (replay) == NULL)
+ {
+ unsigned int steps;
+
+ steps = btrace_insn_prev (replay, 1);
+ if (steps == 0)
+ error (_("No trace."));
+ }
+
+ /* We're not replaying, yet. */
+ gdb_assert (btinfo->replay == NULL);
+ btinfo->replay = replay;
+
+ /* Make sure we're not using any stale registers. */
+ registers_changed_thread (tp);
+
+ /* The current frame with replaying - computed via btrace unwind. */
+ frame_id = get_thread_current_frame_id (tp);
+
+ /* Replace stepping related frames where necessary. */
+ if (upd_step_frame_id)
+ tp->control.step_frame_id = frame_id;
+ if (upd_step_stack_frame_id)
+ tp->control.step_stack_frame_id = frame_id;
+ }
+ catch (const gdb_exception &except)
+ {
+ xfree (btinfo->replay);
+ btinfo->replay = NULL;
+
+ registers_changed_thread (tp);
+
+ throw;
+ }
+
+ return replay;
+}
+
+/* Stop replaying a thread. */
+
+static void
+record_btrace_stop_replaying (struct thread_info *tp)
+{
+ struct btrace_thread_info *btinfo;
+
+ btinfo = &tp->btrace;
+
+ xfree (btinfo->replay);
+ btinfo->replay = NULL;
+
+ /* Make sure we're not leaving any stale registers. */
+ registers_changed_thread (tp);
+}
+
+/* Stop replaying TP if it is at the end of its execution history. */
+
+static void
+record_btrace_stop_replaying_at_end (struct thread_info *tp)
+{
+ struct btrace_insn_iterator *replay, end;
+ struct btrace_thread_info *btinfo;
+
+ btinfo = &tp->btrace;
+ replay = btinfo->replay;
+
+ if (replay == NULL)
+ return;
+
+ btrace_insn_end (&end, btinfo);
+
+ if (btrace_insn_cmp (replay, &end) == 0)
+ record_btrace_stop_replaying (tp);
+}
+
+/* The resume method of target record-btrace. */
+
+void
+record_btrace_target::resume (ptid_t ptid, int step, enum gdb_signal signal)
+{
+ enum btrace_thread_flag flag, cflag;
+
+ DEBUG ("resume %s: %s%s", target_pid_to_str (ptid).c_str (),
+ ::execution_direction == EXEC_REVERSE ? "reverse-" : "",
+ step ? "step" : "cont");
+
+ /* Store the execution direction of the last resume.
+
+ If there is more than one resume call, we have to rely on infrun
+ to not change the execution direction in-between. */
+ record_btrace_resume_exec_dir = ::execution_direction;
+
+ /* As long as we're not replaying, just forward the request.
+
+ For non-stop targets this means that no thread is replaying. In order to
+ make progress, we may need to explicitly move replaying threads to the end
+ of their execution history. */
+ if ((::execution_direction != EXEC_REVERSE)
+ && !record_is_replaying (minus_one_ptid))
+ {
+ this->beneath ()->resume (ptid, step, signal);
+ return;
+ }
+
+ /* Compute the btrace thread flag for the requested move. */
+ if (::execution_direction == EXEC_REVERSE)
+ {
+ flag = step == 0 ? BTHR_RCONT : BTHR_RSTEP;
+ cflag = BTHR_RCONT;
+ }
+ else
+ {
+ flag = step == 0 ? BTHR_CONT : BTHR_STEP;
+ cflag = BTHR_CONT;
+ }
+
+ /* We just indicate the resume intent here. The actual stepping happens in
+ record_btrace_wait below.
+
+ For all-stop targets, we only step INFERIOR_PTID and continue others. */
+ if (!target_is_non_stop_p ())
+ {
+ gdb_assert (inferior_ptid.matches (ptid));
+
+ for (thread_info *tp : all_non_exited_threads (ptid))
+ {
+ if (tp->ptid.matches (inferior_ptid))
+ record_btrace_resume_thread (tp, flag);
+ else
+ record_btrace_resume_thread (tp, cflag);
+ }
+ }
+ else
+ {
+ for (thread_info *tp : all_non_exited_threads (ptid))
+ record_btrace_resume_thread (tp, flag);
+ }
+
+ /* Async support. */
+ if (target_can_async_p ())
+ {
+ target_async (1);
+ mark_async_event_handler (record_btrace_async_inferior_event_handler);
+ }
+}
+
+/* The commit_resume method of target record-btrace. */
+
+void
+record_btrace_target::commit_resume ()
+{
+ if ((::execution_direction != EXEC_REVERSE)
+ && !record_is_replaying (minus_one_ptid))
+ beneath ()->commit_resume ();
+}
+
+/* Cancel resuming TP. */
+
+static void
+record_btrace_cancel_resume (struct thread_info *tp)
+{
+ enum btrace_thread_flag flags;
+
+ flags = tp->btrace.flags & (BTHR_MOVE | BTHR_STOP);
+ if (flags == 0)
+ return;
+
+ DEBUG ("cancel resume thread %s (%s): %x (%s)",
+ print_thread_id (tp),
+ target_pid_to_str (tp->ptid).c_str (), flags,
+ btrace_thread_flag_to_str (flags));
+
+ tp->btrace.flags &= ~(BTHR_MOVE | BTHR_STOP);
+ record_btrace_stop_replaying_at_end (tp);
+}
+
+/* Return a target_waitstatus indicating that we ran out of history. */
+
+static struct target_waitstatus
+btrace_step_no_history (void)
+{
+ struct target_waitstatus status;
+
+ status.kind = TARGET_WAITKIND_NO_HISTORY;
+
+ return status;
+}
+
+/* Return a target_waitstatus indicating that a step finished. */
+
+static struct target_waitstatus
+btrace_step_stopped (void)
+{
+ struct target_waitstatus status;
+
+ status.kind = TARGET_WAITKIND_STOPPED;
+ status.value.sig = GDB_SIGNAL_TRAP;
+
+ return status;
+}
+
+/* Return a target_waitstatus indicating that a thread was stopped as
+ requested. */
+
+static struct target_waitstatus
+btrace_step_stopped_on_request (void)
+{
+ struct target_waitstatus status;
+
+ status.kind = TARGET_WAITKIND_STOPPED;
+ status.value.sig = GDB_SIGNAL_0;
+
+ return status;
+}
+
+/* Return a target_waitstatus indicating a spurious stop. */
+
+static struct target_waitstatus
+btrace_step_spurious (void)
+{
+ struct target_waitstatus status;
+
+ status.kind = TARGET_WAITKIND_SPURIOUS;
+
+ return status;
+}
+
+/* Return a target_waitstatus indicating that the thread was not resumed. */
+
+static struct target_waitstatus
+btrace_step_no_resumed (void)
+{
+ struct target_waitstatus status;
+
+ status.kind = TARGET_WAITKIND_NO_RESUMED;
+
+ return status;
+}
+
+/* Return a target_waitstatus indicating that we should wait again. */
+
+static struct target_waitstatus
+btrace_step_again (void)
+{
+ struct target_waitstatus status;
+
+ status.kind = TARGET_WAITKIND_IGNORE;
+
+ return status;
+}
+
+/* Clear the record histories. */
+
+static void
+record_btrace_clear_histories (struct btrace_thread_info *btinfo)
+{
+ xfree (btinfo->insn_history);
+ xfree (btinfo->call_history);
+
+ btinfo->insn_history = NULL;
+ btinfo->call_history = NULL;
+}
+
+/* Check whether TP's current replay position is at a breakpoint. */
+
+static int
+record_btrace_replay_at_breakpoint (struct thread_info *tp)
+{
+ struct btrace_insn_iterator *replay;
+ struct btrace_thread_info *btinfo;
+ const struct btrace_insn *insn;
+
+ btinfo = &tp->btrace;
+ replay = btinfo->replay;
+
+ if (replay == NULL)
+ return 0;
+
+ insn = btrace_insn_get (replay);
+ if (insn == NULL)
+ return 0;
+
+ return record_check_stopped_by_breakpoint (tp->inf->aspace, insn->pc,
+ &btinfo->stop_reason);
+}
+
+/* Step one instruction in forward direction. */
+
+static struct target_waitstatus
+record_btrace_single_step_forward (struct thread_info *tp)
+{
+ struct btrace_insn_iterator *replay, end, start;
+ struct btrace_thread_info *btinfo;
+
+ btinfo = &tp->btrace;
+ replay = btinfo->replay;
+
+ /* We're done if we're not replaying. */
+ if (replay == NULL)
+ return btrace_step_no_history ();
+
+ /* Check if we're stepping a breakpoint. */
+ if (record_btrace_replay_at_breakpoint (tp))
+ return btrace_step_stopped ();
+
+ /* Skip gaps during replay. If we end up at a gap (at the end of the trace),
+ jump back to the instruction at which we started. */
+ start = *replay;
+ do
+ {
+ unsigned int steps;
+
+ /* We will bail out here if we continue stepping after reaching the end
+ of the execution history. */
+ steps = btrace_insn_next (replay, 1);
+ if (steps == 0)
+ {
+ *replay = start;
+ return btrace_step_no_history ();
+ }
+ }
+ while (btrace_insn_get (replay) == NULL);
+
+ /* Determine the end of the instruction trace. */
+ btrace_insn_end (&end, btinfo);
+
+ /* The execution trace contains (and ends with) the current instruction.
+ This instruction has not been executed, yet, so the trace really ends
+ one instruction earlier. */
+ if (btrace_insn_cmp (replay, &end) == 0)
+ return btrace_step_no_history ();
+
+ return btrace_step_spurious ();
+}
+
+/* Step one instruction in backward direction. */
+
+static struct target_waitstatus
+record_btrace_single_step_backward (struct thread_info *tp)
+{
+ struct btrace_insn_iterator *replay, start;
+ struct btrace_thread_info *btinfo;
+
+ btinfo = &tp->btrace;
+ replay = btinfo->replay;
+
+ /* Start replaying if we're not already doing so. */
+ if (replay == NULL)
+ replay = record_btrace_start_replaying (tp);
+
+ /* If we can't step any further, we reached the end of the history.
+ Skip gaps during replay. If we end up at a gap (at the beginning of
+ the trace), jump back to the instruction at which we started. */
+ start = *replay;
+ do
+ {
+ unsigned int steps;
+
+ steps = btrace_insn_prev (replay, 1);
+ if (steps == 0)
+ {
+ *replay = start;
+ return btrace_step_no_history ();
+ }
+ }
+ while (btrace_insn_get (replay) == NULL);
+
+ /* Check if we're stepping a breakpoint.
+
+ For reverse-stepping, this check is after the step. There is logic in
+ infrun.c that handles reverse-stepping separately. See, for example,
+ proceed and adjust_pc_after_break.
+
+ This code assumes that for reverse-stepping, PC points to the last
+ de-executed instruction, whereas for forward-stepping PC points to the
+ next to-be-executed instruction. */
+ if (record_btrace_replay_at_breakpoint (tp))
+ return btrace_step_stopped ();
+
+ return btrace_step_spurious ();
+}
+
+/* Step a single thread. */
+
+static struct target_waitstatus
+record_btrace_step_thread (struct thread_info *tp)
+{
+ struct btrace_thread_info *btinfo;
+ struct target_waitstatus status;
+ enum btrace_thread_flag flags;
+
+ btinfo = &tp->btrace;
+
+ flags = btinfo->flags & (BTHR_MOVE | BTHR_STOP);
+ btinfo->flags &= ~(BTHR_MOVE | BTHR_STOP);
+
+ DEBUG ("stepping thread %s (%s): %x (%s)", print_thread_id (tp),
+ target_pid_to_str (tp->ptid).c_str (), flags,
+ btrace_thread_flag_to_str (flags));
+
+ /* We can't step without an execution history. */
+ if ((flags & BTHR_MOVE) != 0 && btrace_is_empty (tp))
+ return btrace_step_no_history ();
+
+ switch (flags)
+ {
+ default:
+ internal_error (__FILE__, __LINE__, _("invalid stepping type."));
+
+ case BTHR_STOP:
+ return btrace_step_stopped_on_request ();
+
+ case BTHR_STEP:
+ status = record_btrace_single_step_forward (tp);
+ if (status.kind != TARGET_WAITKIND_SPURIOUS)
+ break;
+
+ return btrace_step_stopped ();
+
+ case BTHR_RSTEP:
+ status = record_btrace_single_step_backward (tp);
+ if (status.kind != TARGET_WAITKIND_SPURIOUS)
+ break;
+
+ return btrace_step_stopped ();
+
+ case BTHR_CONT:
+ status = record_btrace_single_step_forward (tp);
+ if (status.kind != TARGET_WAITKIND_SPURIOUS)
+ break;
+
+ btinfo->flags |= flags;
+ return btrace_step_again ();
+
+ case BTHR_RCONT:
+ status = record_btrace_single_step_backward (tp);
+ if (status.kind != TARGET_WAITKIND_SPURIOUS)
+ break;
+
+ btinfo->flags |= flags;
+ return btrace_step_again ();
+ }
+
+ /* We keep threads moving at the end of their execution history. The wait
+ method will stop the thread for whom the event is reported. */
+ if (status.kind == TARGET_WAITKIND_NO_HISTORY)
+ btinfo->flags |= flags;
+
+ return status;
+}
+
+/* Announce further events if necessary. */
+
+static void
+record_btrace_maybe_mark_async_event
+ (const std::vector<thread_info *> &moving,
+ const std::vector<thread_info *> &no_history)
+{
+ bool more_moving = !moving.empty ();
+ bool more_no_history = !no_history.empty ();;
+
+ if (!more_moving && !more_no_history)
+ return;
+
+ if (more_moving)
+ DEBUG ("movers pending");
+
+ if (more_no_history)
+ DEBUG ("no-history pending");
+
+ mark_async_event_handler (record_btrace_async_inferior_event_handler);
+}
+
+/* The wait method of target record-btrace. */
+
+ptid_t
+record_btrace_target::wait (ptid_t ptid, struct target_waitstatus *status,
+ int options)
+{
+ std::vector<thread_info *> moving;
+ std::vector<thread_info *> no_history;
+
+ DEBUG ("wait %s (0x%x)", target_pid_to_str (ptid).c_str (), options);
+
+ /* As long as we're not replaying, just forward the request. */
+ if ((::execution_direction != EXEC_REVERSE)
+ && !record_is_replaying (minus_one_ptid))
+ {
+ return this->beneath ()->wait (ptid, status, options);
+ }
+
+ /* Keep a work list of moving threads. */
+ for (thread_info *tp : all_non_exited_threads (ptid))
+ if ((tp->btrace.flags & (BTHR_MOVE | BTHR_STOP)) != 0)
+ moving.push_back (tp);
+
+ if (moving.empty ())
+ {
+ *status = btrace_step_no_resumed ();
+
+ DEBUG ("wait ended by %s: %s", target_pid_to_str (null_ptid).c_str (),
+ target_waitstatus_to_string (status).c_str ());
+
+ return null_ptid;
+ }
+
+ /* Step moving threads one by one, one step each, until either one thread
+ reports an event or we run out of threads to step.
+
+ When stepping more than one thread, chances are that some threads reach
+ the end of their execution history earlier than others. If we reported
+ this immediately, all-stop on top of non-stop would stop all threads and
+ resume the same threads next time. And we would report the same thread
+ having reached the end of its execution history again.
+
+ In the worst case, this would starve the other threads. But even if other
+ threads would be allowed to make progress, this would result in far too
+ many intermediate stops.
+
+ We therefore delay the reporting of "no execution history" until we have
+ nothing else to report. By this time, all threads should have moved to
+ either the beginning or the end of their execution history. There will
+ be a single user-visible stop. */
+ struct thread_info *eventing = NULL;
+ while ((eventing == NULL) && !moving.empty ())
+ {
+ for (unsigned int ix = 0; eventing == NULL && ix < moving.size ();)
+ {
+ thread_info *tp = moving[ix];
+
+ *status = record_btrace_step_thread (tp);
+
+ switch (status->kind)
+ {
+ case TARGET_WAITKIND_IGNORE:
+ ix++;
+ break;
+
+ case TARGET_WAITKIND_NO_HISTORY:
+ no_history.push_back (ordered_remove (moving, ix));
+ break;
+
+ default:
+ eventing = unordered_remove (moving, ix);
+ break;
+ }
+ }
+ }
+
+ if (eventing == NULL)
+ {
+ /* We started with at least one moving thread. This thread must have
+ either stopped or reached the end of its execution history.
+
+ In the former case, EVENTING must not be NULL.
+ In the latter case, NO_HISTORY must not be empty. */
+ gdb_assert (!no_history.empty ());
+
+ /* We kept threads moving at the end of their execution history. Stop
+ EVENTING now that we are going to report its stop. */
+ eventing = unordered_remove (no_history, 0);
+ eventing->btrace.flags &= ~BTHR_MOVE;
+
+ *status = btrace_step_no_history ();
+ }
+
+ gdb_assert (eventing != NULL);
+
+ /* We kept threads replaying at the end of their execution history. Stop
+ replaying EVENTING now that we are going to report its stop. */
+ record_btrace_stop_replaying_at_end (eventing);
+
+ /* Stop all other threads. */
+ if (!target_is_non_stop_p ())
+ {
+ for (thread_info *tp : all_non_exited_threads ())
+ record_btrace_cancel_resume (tp);
+ }
+
+ /* In async mode, we need to announce further events. */
+ if (target_is_async_p ())
+ record_btrace_maybe_mark_async_event (moving, no_history);
+
+ /* Start record histories anew from the current position. */
+ record_btrace_clear_histories (&eventing->btrace);
+
+ /* We moved the replay position but did not update registers. */
+ registers_changed_thread (eventing);
+
+ DEBUG ("wait ended by thread %s (%s): %s",
+ print_thread_id (eventing),
+ target_pid_to_str (eventing->ptid).c_str (),
+ target_waitstatus_to_string (status).c_str ());
+
+ return eventing->ptid;
+}
+
+/* The stop method of target record-btrace. */
+
+void
+record_btrace_target::stop (ptid_t ptid)
+{
+ DEBUG ("stop %s", target_pid_to_str (ptid).c_str ());
+
+ /* As long as we're not replaying, just forward the request. */
+ if ((::execution_direction != EXEC_REVERSE)
+ && !record_is_replaying (minus_one_ptid))
+ {
+ this->beneath ()->stop (ptid);
+ }
+ else
+ {
+ for (thread_info *tp : all_non_exited_threads (ptid))
+ {
+ tp->btrace.flags &= ~BTHR_MOVE;
+ tp->btrace.flags |= BTHR_STOP;
+ }
+ }
+ }
+
+/* The can_execute_reverse method of target record-btrace. */
+
+bool
+record_btrace_target::can_execute_reverse ()
+{
+ return true;
+}
+
+/* The stopped_by_sw_breakpoint method of target record-btrace. */
+
+bool
+record_btrace_target::stopped_by_sw_breakpoint ()
+{
+ if (record_is_replaying (minus_one_ptid))
+ {
+ struct thread_info *tp = inferior_thread ();
+
+ return tp->btrace.stop_reason == TARGET_STOPPED_BY_SW_BREAKPOINT;
+ }
+
+ return this->beneath ()->stopped_by_sw_breakpoint ();
+}
+
+/* The supports_stopped_by_sw_breakpoint method of target
+ record-btrace. */
+
+bool
+record_btrace_target::supports_stopped_by_sw_breakpoint ()
+{
+ if (record_is_replaying (minus_one_ptid))
+ return true;
+
+ return this->beneath ()->supports_stopped_by_sw_breakpoint ();
+}
+
+/* The stopped_by_sw_breakpoint method of target record-btrace. */
+
+bool
+record_btrace_target::stopped_by_hw_breakpoint ()
+{
+ if (record_is_replaying (minus_one_ptid))
+ {
+ struct thread_info *tp = inferior_thread ();
+
+ return tp->btrace.stop_reason == TARGET_STOPPED_BY_HW_BREAKPOINT;
+ }
+
+ return this->beneath ()->stopped_by_hw_breakpoint ();
+}
+
+/* The supports_stopped_by_hw_breakpoint method of target
+ record-btrace. */
+
+bool
+record_btrace_target::supports_stopped_by_hw_breakpoint ()
+{
+ if (record_is_replaying (minus_one_ptid))
+ return true;
+
+ return this->beneath ()->supports_stopped_by_hw_breakpoint ();
+}
+
+/* The update_thread_list method of target record-btrace. */
+
+void
+record_btrace_target::update_thread_list ()
+{
+ /* We don't add or remove threads during replay. */
+ if (record_is_replaying (minus_one_ptid))
+ return;
+
+ /* Forward the request. */
+ this->beneath ()->update_thread_list ();
+}
+
+/* The thread_alive method of target record-btrace. */
+
+bool
+record_btrace_target::thread_alive (ptid_t ptid)
+{
+ /* We don't add or remove threads during replay. */
+ if (record_is_replaying (minus_one_ptid))
+ return true;
+
+ /* Forward the request. */
+ return this->beneath ()->thread_alive (ptid);
+}
+
+/* Set the replay branch trace instruction iterator. If IT is NULL, replay
+ is stopped. */
+
+static void
+record_btrace_set_replay (struct thread_info *tp,
+ const struct btrace_insn_iterator *it)
+{
+ struct btrace_thread_info *btinfo;
+
+ btinfo = &tp->btrace;
+
+ if (it == NULL)
+ record_btrace_stop_replaying (tp);
+ else
+ {
+ if (btinfo->replay == NULL)
+ record_btrace_start_replaying (tp);
+ else if (btrace_insn_cmp (btinfo->replay, it) == 0)
+ return;
+
+ *btinfo->replay = *it;
+ registers_changed_thread (tp);
+ }
+
+ /* Start anew from the new replay position. */
+ record_btrace_clear_histories (btinfo);
+
+ inferior_thread ()->suspend.stop_pc
+ = regcache_read_pc (get_current_regcache ());
+ print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1);
+}
+
+/* The goto_record_begin method of target record-btrace. */
+
+void
+record_btrace_target::goto_record_begin ()
+{
+ struct thread_info *tp;
+ struct btrace_insn_iterator begin;
+
+ tp = require_btrace_thread ();
+
+ btrace_insn_begin (&begin, &tp->btrace);
+
+ /* Skip gaps at the beginning of the trace. */
+ while (btrace_insn_get (&begin) == NULL)
+ {
+ unsigned int steps;
+
+ steps = btrace_insn_next (&begin, 1);
+ if (steps == 0)
+ error (_("No trace."));
+ }
+
+ record_btrace_set_replay (tp, &begin);
+}
+
+/* The goto_record_end method of target record-btrace. */
+
+void
+record_btrace_target::goto_record_end ()
+{
+ struct thread_info *tp;
+
+ tp = require_btrace_thread ();
+
+ record_btrace_set_replay (tp, NULL);
+}
+
+/* The goto_record method of target record-btrace. */
+
+void
+record_btrace_target::goto_record (ULONGEST insn)
+{
+ struct thread_info *tp;
+ struct btrace_insn_iterator it;
+ unsigned int number;
+ int found;
+
+ number = insn;
+
+ /* Check for wrap-arounds. */
+ if (number != insn)
+ error (_("Instruction number out of range."));
+
+ tp = require_btrace_thread ();
+
+ found = btrace_find_insn_by_number (&it, &tp->btrace, number);
+
+ /* Check if the instruction could not be found or is a gap. */
+ if (found == 0 || btrace_insn_get (&it) == NULL)
+ error (_("No such instruction."));
+
+ record_btrace_set_replay (tp, &it);
+}
+
+/* The record_stop_replaying method of target record-btrace. */
+
+void
+record_btrace_target::record_stop_replaying ()
+{
+ for (thread_info *tp : all_non_exited_threads ())
+ record_btrace_stop_replaying (tp);
+}
+
+/* The execution_direction target method. */
+
+enum exec_direction_kind
+record_btrace_target::execution_direction ()
+{
+ return record_btrace_resume_exec_dir;
+}
+
+/* The prepare_to_generate_core target method. */
+
+void
+record_btrace_target::prepare_to_generate_core ()
+{
+ record_btrace_generating_corefile = 1;
+}
+
+/* The done_generating_core target method. */
+
+void
+record_btrace_target::done_generating_core ()
+{
+ record_btrace_generating_corefile = 0;
+}
+
+/* Start recording in BTS format. */
+
+static void
+cmd_record_btrace_bts_start (const char *args, int from_tty)
+{
+ if (args != NULL && *args != 0)
+ error (_("Invalid argument."));
+
+ record_btrace_conf.format = BTRACE_FORMAT_BTS;
+
+ try
+ {
+ execute_command ("target record-btrace", from_tty);
+ }
+ catch (const gdb_exception &exception)
+ {
+ record_btrace_conf.format = BTRACE_FORMAT_NONE;
+ throw;
+ }
+}
+
+/* Start recording in Intel Processor Trace format. */
+
+static void
+cmd_record_btrace_pt_start (const char *args, int from_tty)
+{
+ if (args != NULL && *args != 0)
+ error (_("Invalid argument."));
+
+ record_btrace_conf.format = BTRACE_FORMAT_PT;
+
+ try
+ {
+ execute_command ("target record-btrace", from_tty);
+ }
+ catch (const gdb_exception &exception)
+ {
+ record_btrace_conf.format = BTRACE_FORMAT_NONE;
+ throw;
+ }
+}
+
+/* Alias for "target record". */
+
+static void
+cmd_record_btrace_start (const char *args, int from_tty)
+{
+ if (args != NULL && *args != 0)
+ error (_("Invalid argument."));
+
+ record_btrace_conf.format = BTRACE_FORMAT_PT;
+
+ try
+ {
+ execute_command ("target record-btrace", from_tty);
+ }
+ catch (const gdb_exception &exception)
+ {
+ record_btrace_conf.format = BTRACE_FORMAT_BTS;
+
+ try
+ {
+ execute_command ("target record-btrace", from_tty);
+ }
+ catch (const gdb_exception &ex)
+ {
+ record_btrace_conf.format = BTRACE_FORMAT_NONE;
+ throw;
+ }
+ }
+}
+
+/* The "set record btrace" command. */
+
+static void
+cmd_set_record_btrace (const char *args, int from_tty)
+{
+ printf_unfiltered (_("\"set record btrace\" must be followed "
+ "by an appropriate subcommand.\n"));
+ help_list (set_record_btrace_cmdlist, "set record btrace ",
+ all_commands, gdb_stdout);
+}
+
+/* The "show record btrace" command. */
+
+static void
+cmd_show_record_btrace (const char *args, int from_tty)
+{
+ cmd_show_list (show_record_btrace_cmdlist, from_tty, "");
+}
+
+/* The "show record btrace replay-memory-access" command. */
+
+static void
+cmd_show_replay_memory_access (struct ui_file *file, int from_tty,
+ struct cmd_list_element *c, const char *value)
+{
+ fprintf_filtered (gdb_stdout, _("Replay memory access is %s.\n"),
+ replay_memory_access);
+}
+
+/* The "set record btrace cpu none" command. */
+
+static void
+cmd_set_record_btrace_cpu_none (const char *args, int from_tty)
+{
+ if (args != nullptr && *args != 0)
+ error (_("Trailing junk: '%s'."), args);
+
+ record_btrace_cpu_state = CS_NONE;
+}
+
+/* The "set record btrace cpu auto" command. */
+
+static void
+cmd_set_record_btrace_cpu_auto (const char *args, int from_tty)
+{
+ if (args != nullptr && *args != 0)
+ error (_("Trailing junk: '%s'."), args);
+
+ record_btrace_cpu_state = CS_AUTO;
+}
+
+/* The "set record btrace cpu" command. */
+
+static void
+cmd_set_record_btrace_cpu (const char *args, int from_tty)
+{
+ if (args == nullptr)
+ args = "";
+
+ /* We use a hard-coded vendor string for now. */
+ unsigned int family, model, stepping;
+ int l1, l2, matches = sscanf (args, "intel: %u/%u%n/%u%n", &family,
+ &model, &l1, &stepping, &l2);
+ if (matches == 3)
+ {
+ if (strlen (args) != l2)
+ error (_("Trailing junk: '%s'."), args + l2);
+ }
+ else if (matches == 2)
+ {
+ if (strlen (args) != l1)
+ error (_("Trailing junk: '%s'."), args + l1);
+
+ stepping = 0;
+ }
+ else
+ error (_("Bad format. See \"help set record btrace cpu\"."));
+
+ if (USHRT_MAX < family)
+ error (_("Cpu family too big."));
+
+ if (UCHAR_MAX < model)
+ error (_("Cpu model too big."));
+
+ if (UCHAR_MAX < stepping)
+ error (_("Cpu stepping too big."));
+
+ record_btrace_cpu.vendor = CV_INTEL;
+ record_btrace_cpu.family = family;
+ record_btrace_cpu.model = model;
+ record_btrace_cpu.stepping = stepping;
+
+ record_btrace_cpu_state = CS_CPU;
+}
+
+/* The "show record btrace cpu" command. */
+
+static void
+cmd_show_record_btrace_cpu (const char *args, int from_tty)
+{
+ if (args != nullptr && *args != 0)
+ error (_("Trailing junk: '%s'."), args);
+
+ switch (record_btrace_cpu_state)
+ {
+ case CS_AUTO:
+ printf_unfiltered (_("btrace cpu is 'auto'.\n"));
+ return;
+
+ case CS_NONE:
+ printf_unfiltered (_("btrace cpu is 'none'.\n"));
+ return;
+
+ case CS_CPU:
+ switch (record_btrace_cpu.vendor)
+ {
+ case CV_INTEL:
+ if (record_btrace_cpu.stepping == 0)
+ printf_unfiltered (_("btrace cpu is 'intel: %u/%u'.\n"),
+ record_btrace_cpu.family,
+ record_btrace_cpu.model);
+ else
+ printf_unfiltered (_("btrace cpu is 'intel: %u/%u/%u'.\n"),
+ record_btrace_cpu.family,
+ record_btrace_cpu.model,
+ record_btrace_cpu.stepping);
+ return;
+ }
+ }
+
+ error (_("Internal error: bad cpu state."));
+}
+
+/* The "s record btrace bts" command. */
+
+static void
+cmd_set_record_btrace_bts (const char *args, int from_tty)
+{
+ printf_unfiltered (_("\"set record btrace bts\" must be followed "
+ "by an appropriate subcommand.\n"));
+ help_list (set_record_btrace_bts_cmdlist, "set record btrace bts ",
+ all_commands, gdb_stdout);
+}
+
+/* The "show record btrace bts" command. */
+
+static void
+cmd_show_record_btrace_bts (const char *args, int from_tty)
+{
+ cmd_show_list (show_record_btrace_bts_cmdlist, from_tty, "");
+}
+
+/* The "set record btrace pt" command. */
+
+static void
+cmd_set_record_btrace_pt (const char *args, int from_tty)
+{
+ printf_unfiltered (_("\"set record btrace pt\" must be followed "
+ "by an appropriate subcommand.\n"));
+ help_list (set_record_btrace_pt_cmdlist, "set record btrace pt ",
+ all_commands, gdb_stdout);
+}
+
+/* The "show record btrace pt" command. */
+
+static void
+cmd_show_record_btrace_pt (const char *args, int from_tty)
+{
+ cmd_show_list (show_record_btrace_pt_cmdlist, from_tty, "");
+}
+
+/* The "record bts buffer-size" show value function. */
+
+static void
+show_record_bts_buffer_size_value (struct ui_file *file, int from_tty,
+ struct cmd_list_element *c,
+ const char *value)
+{
+ fprintf_filtered (file, _("The record/replay bts buffer size is %s.\n"),
+ value);
+}
+
+/* The "record pt buffer-size" show value function. */
+
+static void
+show_record_pt_buffer_size_value (struct ui_file *file, int from_tty,
+ struct cmd_list_element *c,
+ const char *value)
+{
+ fprintf_filtered (file, _("The record/replay pt buffer size is %s.\n"),
+ value);
+}
/* Initialize btrace commands. */
void
_initialize_record_btrace (void)
{
- add_cmd ("btrace", class_obscure, cmd_record_btrace_start,
- _("Start branch trace recording."),
- &record_cmdlist);
+ add_prefix_cmd ("btrace", class_obscure, cmd_record_btrace_start,
+ _("Start branch trace recording."), &record_btrace_cmdlist,
+ "record btrace ", 0, &record_cmdlist);
add_alias_cmd ("b", "btrace", class_obscure, 1, &record_cmdlist);
- init_record_btrace_ops ();
- add_target (&record_btrace_ops);
+ add_cmd ("bts", class_obscure, cmd_record_btrace_bts_start,
+ _("\
+Start branch trace recording in Branch Trace Store (BTS) format.\n\n\
+The processor stores a from/to record for each branch into a cyclic buffer.\n\
+This format may not be available on all processors."),
+ &record_btrace_cmdlist);
+ add_alias_cmd ("bts", "btrace bts", class_obscure, 1, &record_cmdlist);
+
+ add_cmd ("pt", class_obscure, cmd_record_btrace_pt_start,
+ _("\
+Start branch trace recording in Intel Processor Trace format.\n\n\
+This format may not be available on all processors."),
+ &record_btrace_cmdlist);
+ add_alias_cmd ("pt", "btrace pt", class_obscure, 1, &record_cmdlist);
+
+ add_prefix_cmd ("btrace", class_support, cmd_set_record_btrace,
+ _("Set record options."), &set_record_btrace_cmdlist,
+ "set record btrace ", 0, &set_record_cmdlist);
+
+ add_prefix_cmd ("btrace", class_support, cmd_show_record_btrace,
+ _("Show record options."), &show_record_btrace_cmdlist,
+ "show record btrace ", 0, &show_record_cmdlist);
+
+ add_setshow_enum_cmd ("replay-memory-access", no_class,
+ replay_memory_access_types, &replay_memory_access, _("\
+Set what memory accesses are allowed during replay."), _("\
+Show what memory accesses are allowed during replay."),
+ _("Default is READ-ONLY.\n\n\
+The btrace record target does not trace data.\n\
+The memory therefore corresponds to the live target and not \
+to the current replay position.\n\n\
+When READ-ONLY, allow accesses to read-only memory during replay.\n\
+When READ-WRITE, allow accesses to read-only and read-write memory during \
+replay."),
+ NULL, cmd_show_replay_memory_access,
+ &set_record_btrace_cmdlist,
+ &show_record_btrace_cmdlist);
+
+ add_prefix_cmd ("cpu", class_support, cmd_set_record_btrace_cpu,
+ _("\
+Set the cpu to be used for trace decode.\n\n\
+The format is \"VENDOR:IDENTIFIER\" or \"none\" or \"auto\" (default).\n\
+For vendor \"intel\" the format is \"FAMILY/MODEL[/STEPPING]\".\n\n\
+When decoding branch trace, enable errata workarounds for the specified cpu.\n\
+The default is \"auto\", which uses the cpu on which the trace was recorded.\n\
+When GDB does not support that cpu, this option can be used to enable\n\
+workarounds for a similar cpu that GDB supports.\n\n\
+When set to \"none\", errata workarounds are disabled."),
+ &set_record_btrace_cpu_cmdlist,
+ "set record btrace cpu ", 1,
+ &set_record_btrace_cmdlist);
+
+ add_cmd ("auto", class_support, cmd_set_record_btrace_cpu_auto, _("\
+Automatically determine the cpu to be used for trace decode."),
+ &set_record_btrace_cpu_cmdlist);
+
+ add_cmd ("none", class_support, cmd_set_record_btrace_cpu_none, _("\
+Do not enable errata workarounds for trace decode."),
+ &set_record_btrace_cpu_cmdlist);
+
+ add_cmd ("cpu", class_support, cmd_show_record_btrace_cpu, _("\
+Show the cpu to be used for trace decode."),
+ &show_record_btrace_cmdlist);
+
+ add_prefix_cmd ("bts", class_support, cmd_set_record_btrace_bts,
+ _("Set record btrace bts options."),
+ &set_record_btrace_bts_cmdlist,
+ "set record btrace bts ", 0, &set_record_btrace_cmdlist);
+
+ add_prefix_cmd ("bts", class_support, cmd_show_record_btrace_bts,
+ _("Show record btrace bts options."),
+ &show_record_btrace_bts_cmdlist,
+ "show record btrace bts ", 0, &show_record_btrace_cmdlist);
+
+ add_setshow_uinteger_cmd ("buffer-size", no_class,
+ &record_btrace_conf.bts.size,
+ _("Set the record/replay bts buffer size."),
+ _("Show the record/replay bts buffer size."), _("\
+When starting recording request a trace buffer of this size. \
+The actual buffer size may differ from the requested size. \
+Use \"info record\" to see the actual buffer size.\n\n\
+Bigger buffers allow longer recording but also take more time to process \
+the recorded execution trace.\n\n\
+The trace buffer size may not be changed while recording."), NULL,
+ show_record_bts_buffer_size_value,
+ &set_record_btrace_bts_cmdlist,
+ &show_record_btrace_bts_cmdlist);
+
+ add_prefix_cmd ("pt", class_support, cmd_set_record_btrace_pt,
+ _("Set record btrace pt options."),
+ &set_record_btrace_pt_cmdlist,
+ "set record btrace pt ", 0, &set_record_btrace_cmdlist);
+
+ add_prefix_cmd ("pt", class_support, cmd_show_record_btrace_pt,
+ _("Show record btrace pt options."),
+ &show_record_btrace_pt_cmdlist,
+ "show record btrace pt ", 0, &show_record_btrace_cmdlist);
+
+ add_setshow_uinteger_cmd ("buffer-size", no_class,
+ &record_btrace_conf.pt.size,
+ _("Set the record/replay pt buffer size."),
+ _("Show the record/replay pt buffer size."), _("\
+Bigger buffers allow longer recording but also take more time to process \
+the recorded execution.\n\
+The actual buffer size may differ from the requested size. Use \"info record\" \
+to see the actual buffer size."), NULL, show_record_pt_buffer_size_value,
+ &set_record_btrace_pt_cmdlist,
+ &show_record_btrace_pt_cmdlist);
+
+ add_target (record_btrace_target_info, record_btrace_target_open);
+
+ bfcache = htab_create_alloc (50, bfcache_hash, bfcache_eq, NULL,
+ xcalloc, xfree);
+
+ record_btrace_conf.bts.size = 64 * 1024;
+ record_btrace_conf.pt.size = 16 * 1024;
}
projects / external / binutils.git / blobdiff