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author | fishsoupisgood <github@madingley.org> | 2019-04-29 01:17:54 +0100 |
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committer | fishsoupisgood <github@madingley.org> | 2019-05-27 03:43:43 +0100 |
commit | 3f2546b2ef55b661fd8dd69682b38992225e86f6 (patch) | |
tree | 65ca85f13617aee1dce474596800950f266a456c /trace/simple.h | |
download | qemu-master.tar.gz qemu-master.tar.bz2 qemu-master.zip |
Diffstat (limited to 'trace/simple.h')
-rw-r--r-- | trace/simple.h | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/trace/simple.h b/trace/simple.h new file mode 100644 index 00000000..69979968 --- /dev/null +++ b/trace/simple.h @@ -0,0 +1,58 @@ +/* + * 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 + +#include <stdint.h> +#include <stdbool.h> +#include <stdio.h> + +#include "trace/generated-events.h" + + +void st_print_trace_file_status(FILE *stream, fprintf_function stream_printf); +void st_set_trace_file_enabled(bool enable); +bool st_set_trace_file(const char *file); +bool st_init(const char *file); +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, TraceEventID 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 */ |