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4a4495d62d
Add new set/show commands to set the processor that is used for enabling errata workarounds when decoding branch trace. The general format is "<vendor>:<identifier>" but we also allow two special values "auto" and "none". The default is "auto", which is the current behaviour of having GDB determine the processor on which the trace was recorded. If that cpu is not known to the trace decoder, e.g. when using an old decoder on a new system, decode may fail with "unknown cpu". In most cases it should suffice to 'downgrade' decode to assume an older cpu. Unfortunately, we can't do this automatically. The other special value, "none", disables errata workarounds. gdb/ * NEWS (New options): announce set/show record btrace cpu. * btrace.c: Include record-btrace.h. (btrace_compute_ftrace_pt): Skip enabling errata workarounds if the vendor is unknown. (btrace_compute_ftrace_1): Add cpu parameter. Update callers. Maybe overwrite the btrace configuration's cpu. (btrace_compute_ftrace): Add cpu parameter. Update callers. (btrace_fetch): Add cpu parameter. Update callers. (btrace_maint_update_pt_packets): Call record_btrace_get_cpu. Maybe overwrite the btrace configuration's cpu. Skip enabling errata workarounds if the vendor is unknown. * python/py-record-btrace.c: Include record-btrace.h. (recpy_bt_begin, recpy_bt_end, recpy_bt_instruction_history) (recpy_bt_function_call_history): Call record_btrace_get_cpu. * record-btrace.c (record_btrace_cpu_state_kind): New. (record_btrace_cpu): New. (set_record_btrace_cpu_cmdlist): New. (record_btrace_get_cpu): New. (require_btrace_thread, record_btrace_info) (record_btrace_resume_thread): Call record_btrace_get_cpu. (cmd_set_record_btrace_cpu_none): New. (cmd_set_record_btrace_cpu_auto): New. (cmd_set_record_btrace_cpu): New. (cmd_show_record_btrace_cpu): New. (_initialize_record_btrace): Initialize set/show record btrace cpu commands. * record-btrace.h (record_btrace_get_cpu): New. testsuite/ * gdb.btrace/cpu.exp: New. doc/ * gdb.texinfo: Document set/show record btrace cpu.
33 lines
1.2 KiB
C
33 lines
1.2 KiB
C
/* Branch trace support for GDB, the GNU debugger.
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Copyright (C) 2016-2018 Free Software Foundation, Inc.
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Contributed by Intel Corp. <tim.wiederhake@intel.com>
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#ifndef RECORD_BTRACE_H
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#define RECORD_BTRACE_H
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/* Push the record_btrace target. */
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extern void record_btrace_push_target (void);
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/* Return the cpu configured by the user via "set btrace cpu". Returns
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NULL if the cpu was configured as auto. */
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extern const struct btrace_cpu *record_btrace_get_cpu (void);
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#endif /* RECORD_BTRACE_H */
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