For most of our functions that take printf-like formats, we
use gcc's __attribute__((format)) to get compiler warnings
when the functions are misused. Let's give a few more
functions the same protection.
In most cases, the annotations do not uncover any actual
bugs; the only code change needed is that we passed a size_t
to transfer_debug, which expected an int. Since we expect
the passed-in value to be a relatively small buffer size
(and cast a similar value to int directly below), we can
just cast away the problem.
Signed-off-by: Jeff King <peff@xxxxxxxx>
---
advice.h | 1 +
trace.c | 1 +
transport-helper.c | 3 ++-
utf8.h | 1 +
4 files changed, 5 insertions(+), 1 deletion(-)
diff --git a/advice.h b/advice.h
index 93a7d11..08fbc8e 100644
--- a/advice.h
+++ b/advice.h
@@ -21,6 +21,7 @@ int git_default_advice_config(const char *var, const char *value);
extern int advice_rm_hints;
int git_default_advice_config(const char *var, const char *value);
+__attribute__((format (printf, 1, 2)))
void advise(const char *advice, ...);
int error_resolve_conflict(const char *me);
extern void NORETURN die_resolve_conflict(const char *me);
diff --git a/trace.c b/trace.c
index 5ec0e3b..3d744d1 100644
--- a/trace.c
+++ b/trace.c
@@ -75,6 +75,7 @@ static void trace_vprintf(const char *key, const char *fmt, va_list ap)
strbuf_release(&buf);
}
+__attribute__((format (printf, 2, 3)))
static void trace_printf_key(const char *key, const char *fmt, ...)
{
va_list ap;
diff --git a/transport-helper.c b/transport-helper.c
index db9bd18..45a35df 100644
--- a/transport-helper.c
+++ b/transport-helper.c
@@ -982,6 +982,7 @@ int transport_helper_init(struct transport *transport, const char *name)
#define PBUFFERSIZE 8192
/* Print bidirectional transfer loop debug message. */
+__attribute__((format (printf, 1, 2)))
static void transfer_debug(const char *fmt, ...)
{
va_list args;
@@ -1067,7 +1068,7 @@ static int udt_do_read(struct unidirectional_transfer *t)
return -1;
} else if (bytes == 0) {
transfer_debug("%s EOF (with %i bytes in buffer)",
- t->src_name, t->bufuse);
+ t->src_name, (int)t->bufuse);
t->state = SSTATE_FLUSHING;
} else if (bytes > 0) {
t->bufuse += bytes;
diff --git a/utf8.h b/utf8.h
index 32a7bfb..65d0e42 100644
--- a/utf8.h
+++ b/utf8.h
@@ -10,6 +10,7 @@ int same_encoding(const char *, const char *);
int is_utf8(const char *text);
int is_encoding_utf8(const char *name);
int same_encoding(const char *, const char *);
+__attribute__((format (printf, 2, 3)))
int utf8_fprintf(FILE *, const char *, ...);
void strbuf_add_wrapped_text(struct strbuf *buf,
--
1.8.3.rc3.24.gec82cb9
--
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