/* 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 */