db25d56c01
st_set_trace_file() accidentally enables tracing. It's called unconditionally during startup, which is why QEMU built with the simple trace backend always writes a trace file "trace-$PID". This has been broken for quite a while. I didn't track down the exact commit. Fix st_set_trace_file() to restore the state. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-id: 20200527065613.25322-1-armbru@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
52 lines
1.2 KiB
C
52 lines
1.2 KiB
C
/*
|
|
* 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
|
|
|
|
void st_print_trace_file_status(void);
|
|
bool st_set_trace_file_enabled(bool enable);
|
|
void st_set_trace_file(const char *file);
|
|
bool st_init(void);
|
|
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, uint32_t 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 */
|