| /* Linux-dependent part of branch trace support for GDB, and GDBserver. |
| |
| Copyright (C) 2013 Free Software Foundation, Inc. |
| |
| Contributed by Intel Corp. <markus.t.metzger@intel.com> |
| |
| This file is part of GDB. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| |
| #ifndef LINUX_BTRACE_H |
| #define LINUX_BTRACE_H |
| |
| #include "btrace-common.h" |
| #include "config.h" |
| #include "vec.h" |
| #include "ptid.h" |
| #include <stddef.h> |
| #include <stdint.h> |
| |
| #if HAVE_LINUX_PERF_EVENT_H |
| # include <linux/perf_event.h> |
| #endif |
| |
| /* Branch trace target information per thread. */ |
| struct btrace_target_info |
| { |
| #if HAVE_LINUX_PERF_EVENT_H |
| /* The Linux perf_event configuration for collecting the branch trace. */ |
| struct perf_event_attr attr; |
| |
| /* The ptid of this thread. */ |
| ptid_t ptid; |
| |
| /* The mmap configuration mapping the branch trace perf_event buffer. |
| |
| file .. the file descriptor |
| buffer .. the mmapped memory buffer |
| size .. the buffer's size in pages without the configuration page |
| data_head .. the data head from the last read */ |
| int file; |
| void *buffer; |
| size_t size; |
| unsigned long data_head; |
| #endif /* HAVE_LINUX_PERF_EVENT_H */ |
| |
| /* The size of a pointer in bits for this thread. |
| The information is used to identify kernel addresses in order to skip |
| records from/to kernel space. */ |
| int ptr_bits; |
| }; |
| |
| /* Check whether branch tracing is supported. */ |
| extern int linux_supports_btrace (void); |
| |
| /* Enable branch tracing for @ptid. */ |
| extern struct btrace_target_info *linux_enable_btrace (ptid_t ptid); |
| |
| /* Disable branch tracing and deallocate @tinfo. */ |
| extern int linux_disable_btrace (struct btrace_target_info *tinfo); |
| |
| /* Read branch trace data. */ |
| extern VEC (btrace_block_s) *linux_read_btrace (struct btrace_target_info *, |
| enum btrace_read_type); |
| |
| #endif /* LINUX_BTRACE_H */ |