mirror of
https://github.com/qemu/qemu.git
synced 2024-12-17 17:23:52 +08:00
263b6e9644
Add helper function and call it for each trace event group added. Makes sure that events added at module load time are initialized properly. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: 20210601132414.432430-6-kraxel@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
53 lines
1.3 KiB
C
53 lines
1.3 KiB
C
/*
|
|
* Simple trace backend
|
|
*
|
|
* Copyright IBM, Corp. 2010
|
|
*
|
|
* This work is licensed under the terms of the GNU GPL, version 2. See
|
|
* the COPYING file in the top-level directory.
|
|
*
|
|
*/
|
|
|
|
#ifndef TRACE_SIMPLE_H
|
|
#define TRACE_SIMPLE_H
|
|
|
|
void st_print_trace_file_status(void);
|
|
bool st_set_trace_file_enabled(bool enable);
|
|
void st_set_trace_file(const char *file);
|
|
bool st_init(void);
|
|
void st_init_group(size_t group);
|
|
void st_flush_trace_buffer(void);
|
|
|
|
typedef struct {
|
|
unsigned int tbuf_idx;
|
|
unsigned int rec_off;
|
|
} TraceBufferRecord;
|
|
|
|
/* Note for hackers: Make sure MAX_TRACE_LEN < sizeof(uint32_t) */
|
|
#define MAX_TRACE_STRLEN 512
|
|
/**
|
|
* Initialize a trace record and claim space for it in the buffer
|
|
*
|
|
* @arglen number of bytes required for arguments
|
|
*/
|
|
int trace_record_start(TraceBufferRecord *rec, uint32_t id, size_t arglen);
|
|
|
|
/**
|
|
* Append a 64-bit argument to a trace record
|
|
*/
|
|
void trace_record_write_u64(TraceBufferRecord *rec, uint64_t val);
|
|
|
|
/**
|
|
* Append a string argument to a trace record
|
|
*/
|
|
void trace_record_write_str(TraceBufferRecord *rec, const char *s, uint32_t slen);
|
|
|
|
/**
|
|
* Mark a trace record completed
|
|
*
|
|
* Don't append any more arguments to the trace record after calling this.
|
|
*/
|
|
void trace_record_finish(TraceBufferRecord *rec);
|
|
|
|
#endif /* TRACE_SIMPLE_H */
|