diff options
Diffstat (limited to 'gdb/nat/linux-btrace.h')
| -rw-r--r-- | gdb/nat/linux-btrace.h | 34 |
1 files changed, 25 insertions, 9 deletions
diff --git a/gdb/nat/linux-btrace.h b/gdb/nat/linux-btrace.h index 24e06e8..602a571 100644 --- a/gdb/nat/linux-btrace.h +++ b/gdb/nat/linux-btrace.h @@ -32,6 +32,24 @@ struct target_ops; +#if HAVE_LINUX_PERF_EVENT_H +/* A Linux perf event buffer. */ +struct perf_event_buffer +{ + /* The mapped memory. */ + const uint8_t *mem; + + /* The size of the mapped memory in bytes. */ + unsigned long long size; + + /* A pointer to the data_head field for this buffer. */ + volatile unsigned long long *data_head; + + /* The data_head value from the last read. */ + unsigned long long last_head; +}; +#endif /* HAVE_LINUX_PERF_EVENT_H */ + /* Branch trace target information per thread. */ struct btrace_target_info { @@ -42,16 +60,14 @@ struct btrace_target_info /* 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 */ + /* The perf event file. */ int file; - void *buffer; - size_t size; - unsigned long data_head; + + /* The perf event configuration page. */ + volatile struct perf_event_mmap_page *header; + + /* The BTS perf event buffer. */ + struct perf_event_buffer bts; #endif /* HAVE_LINUX_PERF_EVENT_H */ /* The size of a pointer in bits for this thread. |