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| author |  Torsten Bögershausen <tboegi@web.de> | 2019-03-19 17:13:46 +0000 |
|---|---|---|
| committer |  Junio C Hamano <gitster@pobox.com> | 2019-03-20 09:48:53 +0900 |
| commit | ad006fe419efda47b0012347c5c2925f9a082101 (patch) | |
| tree | 92e7b6a918a6060d967dbf0523ecc7249d32ac5c /trace2/tr2_tgt_normal.c | |
| parent | Merge branch 'jh/trace2' (diff) | |
| download | tgif-ad006fe419efda47b0012347c5c2925f9a082101.tar.xz | |
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 <tboegi@web.de>
Acked-by: Jeff Hostetler <jeffhost@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'trace2/tr2_tgt_normal.c')
| -rw-r--r-- | trace2/tr2_tgt_normal.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/trace2/tr2_tgt_normal.c b/trace2/tr2_tgt_normal.c index 547183d5b6..1a07d70abd 100644 --- a/trace2/tr2_tgt_normal.c +++ b/trace2/tr2_tgt_normal.c @@ -126,7 +126,7 @@ static void fn_atexit(uint64_t us_elapsed_absolute, int code) static void maybe_append_string_va(struct strbuf *buf, const char *fmt, va_list ap) { - if (fmt && *fmt && ap) { + if (fmt && *fmt) { va_list copy_ap; va_copy(copy_ap, ap); |