diff options
Diffstat (limited to 'sys/cddl/dev/fbt/fbt.c')
| -rw-r--r-- | sys/cddl/dev/fbt/fbt.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/sys/cddl/dev/fbt/fbt.c b/sys/cddl/dev/fbt/fbt.c index c347f2d..00ab7cf 100644 --- a/sys/cddl/dev/fbt/fbt.c +++ b/sys/cddl/dev/fbt/fbt.c @@ -111,6 +111,37 @@ static struct cdev *fbt_cdev; static int fbt_probetab_size; static int fbt_verbose = 0; +int +fbt_excluded(const char *name) +{ + + if (strncmp(name, "dtrace_", 7) == 0 && + strncmp(name, "dtrace_safe_", 12) != 0) { + /* + * Anything beginning with "dtrace_" may be called + * from probe context unless it explicitly indicates + * that it won't be called from probe context by + * using the prefix "dtrace_safe_". + */ + return (1); + } + + /* Exclude some internal functions */ + if (name[0] == '_' && name[1] == '_') + return (1); + + /* + * When DTrace is built into the kernel we need to exclude + * the FBT functions from instrumentation. + */ +#ifndef _KLD_MODULE + if (strncmp(name, "fbt_", 4) == 0) + return (1); +#endif + + return (0); +} + static void fbt_doubletrap(void) { |
