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| author | Paolo Bonzini <pbonzini@redhat.com> | 2025-09-29 17:49:27 +0200 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@redhat.com> | 2025-10-01 11:22:07 -0400 |
| commit | 02d4a4a674d45d41c9afd1fd161c14eca81f7a86 (patch) | |
| tree | 94b23bbfb2fe1b5dc3ded4e53c9b1c12ac6d4746 /trace/ftrace.c | |
| parent | 6f94ad27f0014c04a2aa403988acc22740a21196 (diff) | |
| download | focaccia-qemu-02d4a4a674d45d41c9afd1fd161c14eca81f7a86.tar.gz focaccia-qemu-02d4a4a674d45d41c9afd1fd161c14eca81f7a86.zip | |
trace/ftrace: move snprintf+write from tracepoints to ftrace.c
This simplifies the Python code and reduces the size of the tracepoints. Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org> Reviewed-by: Zhao Liu <zhao1.liu@intel.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Message-ID: <20250929154938.594389-6-pbonzini@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'trace/ftrace.c')
| -rw-r--r-- | trace/ftrace.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/trace/ftrace.c b/trace/ftrace.c index 9749543d9b..6875faedb9 100644 --- a/trace/ftrace.c +++ b/trace/ftrace.c @@ -38,6 +38,21 @@ static int find_mount(char *mount_point, const char *fstype) return ret; } +void ftrace_write(const char *fmt, ...) +{ + char ftrace_buf[MAX_TRACE_STRLEN]; + int unused __attribute__ ((unused)); + int trlen; + va_list ap; + + va_start(ap, fmt); + trlen = vsnprintf(ftrace_buf, MAX_TRACE_STRLEN, fmt, ap); + va_end(ap); + + trlen = MIN(trlen, MAX_TRACE_STRLEN - 1); + unused = write(trace_marker_fd, ftrace_buf, trlen); +} + bool ftrace_init(void) { char mount_point[PATH_MAX]; |