path: root/trace2.h
diff options
authorTorsten Bögershausen <>2019-03-19 17:13:46 (GMT)
committerJunio C Hamano <>2019-03-20 00:48:53 (GMT)
commitad006fe419efda47b0012347c5c2925f9a082101 (patch)
tree92e7b6a918a6060d967dbf0523ecc7249d32ac5c /trace2.h
parent32038fef00b02fb52f362d1d0cf1c25c6c382abb (diff)
trace2: NULL is not allowed for va_list
Some compilers don't allow NULL to be passed for a va_list, and e.g. "gcc (Raspbian 6.3.0-18+rpi1+deb9u1) 6.3.0 20170516" errors out like this: trace2/tr2_tgt_event.c:193:18: error: invalid operands to binary && (have ‘int’ and ‘va_list {aka __va_list}’) if (fmt && *fmt && ap) { ^^ I couldn't find any hints that va_list and pointers can be mixed, and no hints that they can't either. Morten Welinder comments: "C99, Section 7.15, simply says that va_list "is an object type suitable for holding information needed by the macros va_start, va_end, and va_copy". So clearly not guaranteed to be mixable with pointers... The portable solution is to use "va_list" everywhere in the callchain. As a consequence, both trace2_region_enter_fl() and trace2_region_leave_fl() now take a variable argument list. Signed-off-by: Torsten Bögershausen <> Acked-by: Jeff Hostetler <> Signed-off-by: Junio C Hamano <>
Diffstat (limited to 'trace2.h')
1 files changed, 2 insertions, 2 deletions
diff --git a/trace2.h b/trace2.h
index ae5020d..b330a54 100644
--- a/trace2.h
+++ b/trace2.h
@@ -238,7 +238,7 @@ void trace2_def_repo_fl(const char *file, int line, struct repository *repo);
* on this thread.
void trace2_region_enter_fl(const char *file, int line, const char *category,
- const char *label, const struct repository *repo);
+ const char *label, const struct repository *repo, ...);
#define trace2_region_enter(category, label, repo) \
trace2_region_enter_fl(__FILE__, __LINE__, (category), (label), (repo))
@@ -278,7 +278,7 @@ void trace2_region_enter_printf(const char *category, const char *label,
* in this nesting level.
void trace2_region_leave_fl(const char *file, int line, const char *category,
- const char *label, const struct repository *repo);
+ const char *label, const struct repository *repo, ...);
#define trace2_region_leave(category, label, repo) \
trace2_region_leave_fl(__FILE__, __LINE__, (category), (label), (repo))