The first attempt at the sprintf would have consumed part of va, so if
we're going to recurse on overflow to try again in a new allocation then
we have to do our work on a copy.
This was a common failure mode for MESA_GLSL=source, where it would just print:
Mesa: info: GLSL source for fragment shader 1:
Mesa: info: (null)
Fixes:
7a18a1712a0a ("util/log: improve logger_file newline handling")
Reviewed-by: Chia-I Wu <olvaffe@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/22618>
enum mesa_log_level level,
const char *tag,
const char *format,
- va_list va)
+ va_list in_va)
{
struct {
char *cur;
.rem = size,
};
+ va_list va;
+ va_copy(va, in_va);
+
#define APPEND(state, func, ...) \
do { \
int ret = func(state.cur, state.rem, __VA_ARGS__); \
void *alloc = malloc(state.total + 1);
if (alloc) {
buf = logger_vasnprintf(alloc, state.total + 1, affixes, level, tag,
- format, va);
+ format, in_va);
assert(buf == alloc);
} else {
/* pretty-truncate the message */
}
}
+ va_end(va);
+
return buf;
}