jcs.org
qemu with hax to log dma reads & writes
jcs.org/2018/11/12/vfio
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
14void st_print_trace_file_status(void);
15void st_set_trace_file_enabled(bool enable);
16void st_set_trace_file(const char *file);
17bool st_init(void);
18void st_flush_trace_buffer(void);
19
20typedef struct {
21 unsigned int tbuf_idx;
22 unsigned int rec_off;
23} TraceBufferRecord;
24
25/* Note for hackers: Make sure MAX_TRACE_LEN < sizeof(uint32_t) */
26#define MAX_TRACE_STRLEN 512
27/**
28 * Initialize a trace record and claim space for it in the buffer
29 *
30 * @arglen number of bytes required for arguments
31 */
32int trace_record_start(TraceBufferRecord *rec, uint32_t id, size_t arglen);
33
34/**
35 * Append a 64-bit argument to a trace record
36 */
37void trace_record_write_u64(TraceBufferRecord *rec, uint64_t val);
38
39/**
40 * Append a string argument to a trace record
41 */
42void trace_record_write_str(TraceBufferRecord *rec, const char *s, uint32_t slen);
43
44/**
45 * Mark a trace record completed
46 *
47 * Don't append any more arguments to the trace record after calling this.
48 */
49void trace_record_finish(TraceBufferRecord *rec);
50
51#endif /* TRACE_SIMPLE_H */