Merge tag 'pull-for-6.2-291121-1' of https://github.com/stsquad/qemu into staging
[qemu.git] / trace / simple.h
1 /*
2 * Simple trace backend
3 *
4 * Copyright IBM, Corp. 2010
5 *
6 * This work is licensed under the terms of the GNU GPL, version 2. See
7 * the COPYING file in the top-level directory.
8 *
9 */
10
11 #ifndef TRACE_SIMPLE_H
12 #define TRACE_SIMPLE_H
13
14 void st_print_trace_file_status(void);
15 bool st_set_trace_file_enabled(bool enable);
16 void st_set_trace_file(const char *file);
17 bool st_init(void);
18 void st_init_group(size_t group);
19 void st_flush_trace_buffer(void);
20
21 typedef struct {
22 unsigned int tbuf_idx;
23 unsigned int rec_off;
24 } TraceBufferRecord;
25
26 /* Note for hackers: Make sure MAX_TRACE_LEN < sizeof(uint32_t) */
27 #define MAX_TRACE_STRLEN 512
28 /**
29 * Initialize a trace record and claim space for it in the buffer
30 *
31 * @arglen number of bytes required for arguments
32 */
33 int trace_record_start(TraceBufferRecord *rec, uint32_t id, size_t arglen);
34
35 /**
36 * Append a 64-bit argument to a trace record
37 */
38 void trace_record_write_u64(TraceBufferRecord *rec, uint64_t val);
39
40 /**
41 * Append a string argument to a trace record
42 */
43 void trace_record_write_str(TraceBufferRecord *rec, const char *s, uint32_t slen);
44
45 /**
46 * Mark a trace record completed
47 *
48 * Don't append any more arguments to the trace record after calling this.
49 */
50 void trace_record_finish(TraceBufferRecord *rec);
51
52 #endif /* TRACE_SIMPLE_H */