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26f7227b SH |
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 | ||
edb47ec4 LV |
11 | #ifndef TRACE_SIMPLE_H |
12 | #define TRACE_SIMPLE_H | |
26f7227b | 13 | |
ba4912cb | 14 | void st_print_trace_file_status(void); |
db25d56c | 15 | bool st_set_trace_file_enabled(bool enable); |
41fc57e4 PB |
16 | void st_set_trace_file(const char *file); |
17 | bool st_init(void); | |
263b6e96 | 18 | void st_init_group(size_t group); |
c5ceb523 | 19 | void st_flush_trace_buffer(void); |
26f7227b | 20 | |
62bab732 HPB |
21 | typedef struct { |
22 | unsigned int tbuf_idx; | |
62bab732 HPB |
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 | */ | |
ef4c9fc8 | 33 | int trace_record_start(TraceBufferRecord *rec, uint32_t id, size_t arglen); |
62bab732 HPB |
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 | ||
edb47ec4 | 52 | #endif /* TRACE_SIMPLE_H */ |