diff options
Diffstat (limited to 'src/cyclictest/cyclictest.c')
| -rw-r--r-- | src/cyclictest/cyclictest.c | 32 |
1 files changed, 26 insertions, 6 deletions
diff --git a/src/cyclictest/cyclictest.c b/src/cyclictest/cyclictest.c index 9021670..00e5f3d 100644 --- a/src/cyclictest/cyclictest.c +++ b/src/cyclictest/cyclictest.c @@ -489,7 +489,12 @@ static void tracemark(char *fmt, ...) va_start(ap, fmt); len = vsnprintf(tracebuf, TRACEBUFSIZ, fmt, ap); va_end(ap); + + /* write the tracemark message */ write(tracemark_fd, tracebuf, len); + + /* now stop any trace */ + write(trace_fd, "0\n", 2); } @@ -535,13 +540,28 @@ static void open_tracemark_fd(void) { char path[MAX_PATH]; - if (tracemark_fd >= 0) - return; + /* + * open the tracemark file if it's not already open + */ + if (tracemark_fd < 0) { + sprintf(path, "%s/%s", fileprefix, "trace_marker"); + tracemark_fd = open(path, O_WRONLY); + if (tracemark_fd < 0) { + warn("unable to open trace_marker file: %s\n", path); + return; + } + } - sprintf(path, "%s/%s", fileprefix, "trace_marker"); - tracemark_fd = open(path, O_WRONLY); - if (tracemark_fd < 0) - warn("unable to open trace_marker file: %s\n", path); + /* + * if we're not tracing and the tracing_on fd is not open, + * open the tracing_on file so that we can stop the trace + * if we hit a breaktrace threshold + */ + if (notrace && trace_fd < 0) { + sprintf(path, "%s/%s", fileprefix, "tracing_on"); + if ((trace_fd = open(path, O_WRONLY)) < 0) + warn("unable to open tracing_on file: %s\n", path); + } } static void debugfs_prepare(void) |