/* * 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); 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 */