libsanitizer: Fix setbuffer() interceptor (accept size not mode)

  Fixes: b667dd7017a ("Libsanitizer merge from trunk r368656.")
Refs: https://reviews.llvm.org/D116176
---
 .../sanitizer_common/sanitizer_common_interceptors.inc     | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)
  

On 22 December 2021 19:19:12 CET, Azat Khuzhin via Gcc-patches <gcc-patches@gcc.gnu.org> wrote:
>Fixes: b667dd7017a ("Libsanitizer merge from trunk r368656.")
>Refs: https://reviews.llvm.org/D116176
>---
> .../sanitizer_common/sanitizer_common_interceptors.inc     | 7 ++++---
> 1 file changed, 4 insertions(+), 3 deletions(-)
>
>diff --git a/libsanitizer/sanitizer_common/sanitizer_common_interceptors.inc b/libsanitizer/sanitizer_common/sanitizer_common_interceptors.inc
>index abb38ccfa15..60b0545a943 100644
>--- a/libsanitizer/sanitizer_common/sanitizer_common_interceptors.inc
>+++ b/libsanitizer/sanitizer_common/sanitizer_common_interceptors.inc
>@@ -7858,12 +7858,13 @@ INTERCEPTOR(void, setbuf, __sanitizer_FILE *stream, char *buf) {
>       unpoison_file(stream);
> }
> 
>-INTERCEPTOR(void, setbuffer, __sanitizer_FILE *stream, char *buf, int mode) {
>+INTERCEPTOR(void, setbuffer, __sanitizer_FILE *stream, char *buf,
>+  SIZE_T size) {
>   void *ctx;
>-  COMMON_INTERCEPTOR_ENTER(ctx, setbuffer, stream, buf, mode);
>+  COMMON_INTERCEPTOR_ENTER(ctx, setbuffer, stream, buf, size);
>   REAL(setbuffer)(stream, buf, mode);

Where does mode come from after this patch?
thanks,

>   if (buf) {
>-    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, buf, __sanitizer_bufsiz);
>+    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, buf, size);
>   }
>   if (stream)
>     unpoison_file(stream);
  

On Wed, Dec 22, 2021 at 09:41:06PM +0100, Bernhard Reutner-Fischer wrote:
> On 22 December 2021 19:19:12 CET, Azat Khuzhin via Gcc-patches <gcc-patches@gcc.gnu.org> wrote:
> >Fixes: b667dd7017a ("Libsanitizer merge from trunk r368656.")
> >Refs: https://reviews.llvm.org/D116176
> >---
> > .../sanitizer_common/sanitizer_common_interceptors.inc     | 7 ++++---
> > 1 file changed, 4 insertions(+), 3 deletions(-)
> >
> >diff --git a/libsanitizer/sanitizer_common/sanitizer_common_interceptors.inc b/libsanitizer/sanitizer_common/sanitizer_common_interceptors.inc
> >index abb38ccfa15..60b0545a943 100644
> >--- a/libsanitizer/sanitizer_common/sanitizer_common_interceptors.inc
> >+++ b/libsanitizer/sanitizer_common/sanitizer_common_interceptors.inc
> >@@ -7858,12 +7858,13 @@ INTERCEPTOR(void, setbuf, __sanitizer_FILE *stream, char *buf) {
> >       unpoison_file(stream);
> > }
> > 
> >-INTERCEPTOR(void, setbuffer, __sanitizer_FILE *stream, char *buf, int mode) {
> >+INTERCEPTOR(void, setbuffer, __sanitizer_FILE *stream, char *buf,
> >+  SIZE_T size) {
> >   void *ctx;
> >-  COMMON_INTERCEPTOR_ENTER(ctx, setbuffer, stream, buf, mode);
> >+  COMMON_INTERCEPTOR_ENTER(ctx, setbuffer, stream, buf, size);
> >   REAL(setbuffer)(stream, buf, mode);
> 
> Where does mode come from after this patch?

setbuffer() does not accept mode, it simply do not change it.
Only setvbuf() can change the mode.

> thanks,
> 
> >   if (buf) {
> >-    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, buf, __sanitizer_bufsiz);
> >+    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, buf, size);
> >   }
> >   if (stream)
> >     unpoison_file(stream);
>
  

On Wed, Dec 22, 2021 at 09:41:06PM +0100, Bernhard Reutner-Fischer wrote:
> On 22 December 2021 19:19:12 CET, Azat Khuzhin via Gcc-patches <gcc-patches@gcc.gnu.org> wrote:
> >-  COMMON_INTERCEPTOR_ENTER(ctx, setbuffer, stream, buf, mode);
> >+  COMMON_INTERCEPTOR_ENTER(ctx, setbuffer, stream, buf, size);
> >   REAL(setbuffer)(stream, buf, mode);
> 
> Where does mode come from after this patch?

Sorry, missed that.
Fixed and send v2 patch.

Thanks!
  

On Wed, 22 Dec 2021 23:50:39 +0300
Azat Khuzhin <a3at.mail@gmail.com> wrote:

> Thanks!

you're welcome.

You should state how you tested the patch. Please refer to
https://gcc.gnu.org/contribute.html#testing

thanks,
  

On Wed, Dec 22, 2021 at 10:02:02PM +0100, Bernhard Reutner-Fischer wrote:
> You should state how you tested the patch. Please refer to
> https://gcc.gnu.org/contribute.html#testing

I though about this, but when gcc syncs changes with upstream [1], it
does not syncs tests, even though they were there [2].

  [1]: https://github.com/gcc-mirror/gcc/commit/b667dd7017a8
  [2]: https://github.com/llvm/llvm-project/commit/0c81a62d9d76

That's why I though that test can be ommitted in this case (I've added a
test for llvm in [3]).

  [3]: https://reviews.llvm.org/D116176

So what is the right way here?
- migrate all tests
- write test only for setbuffer()
- do not add any tests, since they are covered in llvm repo
  

On 12/22/21 22:09, Azat Khuzhin via Gcc-patches wrote:
> So what is the right way here?
> - migrate all tests
> - write test only for setbuffer()
> - do not add any tests, since they are covered in llvm repo

Hello.

Yes, we don't automatically sync sanitizer tests when we merge from master.
Historically, we have taken some upstream tests, but not all. Problem is that
one needs to migrate (port) LIT markup to DejaGNU format so that it can be supported
in the GCC test-suite.

Cheers,
Martin