Hi Guys,
OK - how about this reformulation of the pr61886 test ?
The patch changes references to __fread_chk with references to just
fread, which I assume will be present in all target runtime libraries.
I had to add some preprocessor trickery in order to ensure that
__USER_LABEL_PREFIX__ is correctly prepended to the assembler name of
the functions, but other than that the test remains the same. No linker
funny business this time.
I have tested this patch with an x86_64 native (whose C runtime does
include __fread_chk), an ARM cross compiler (using newlib, which does
not provide __fread_chk) and with a V850 cross compiler (which uses
newlib and which also defines __USER_LABEL_PREFIX to "_"). Prior to
Honza's r231548 patch all three toolchains fail this patched test.
Using today#s latest and greatest mainline gcc sources, all three
toolchains pass the patched test.
OK to apply ?
Cheers
Nick
gcc/testsuite/ChangeLog
2016-01-08 Nick Clifton <ni...@redhat.com>
PR target/68913
* gcc.dg/lto/pr61886_0.c: Rename the external function called
to fread so that it will be found in all target runtimes.
Index: gcc/testsuite/gcc.dg/lto/pr61886_0.c
===================================================================
--- gcc/testsuite/gcc.dg/lto/pr61886_0.c (revision 232157)
+++ gcc/testsuite/gcc.dg/lto/pr61886_0.c (working copy)
@@ -4,12 +4,15 @@
typedef __SIZE_TYPE__ size_t;
typedef struct _IO_FILE FILE;
-extern size_t __fread_chk (void *__restrict __ptr, size_t __ptrlen,
size_t __size, size_t __n, FILE *__restrict __stream) __asm__ (""
"__fread_chk") __attribute__ ((__warn_unused_result__));
-extern size_t __fread_chk_warn (void *__restrict __ptr, size_t
__ptrlen, size_t __size, size_t __n, FILE *__restrict __stream) __asm__
("" "__fread_chk") __attribute__ ((__warn_unused_result__))
__attribute__((__warning__ ("fread called with bigger size * nmemb than
length " "of destination buffer")));
+#define STRING1(a) #a
+#define STRING2(a) STRING1(a)
+extern size_t fread (void *__restrict __ptr, size_t __ptrlen, size_t
__size, size_t __n, FILE *__restrict __stream) __asm__
(STRING2(__USER_LABEL_PREFIX__) "fread") __attribute__
((__warn_unused_result__));
+extern size_t fread_warn (void *__restrict __ptr, size_t __ptrlen,
size_t __size, size_t __n, FILE *__restrict __stream) __asm__
(STRING2(__USER_LABEL_PREFIX__) "fread") __attribute__
((__warn_unused_result__)) __attribute__((__warning__ ("fread called
with bigger size * nmemb than length " "of destination buffer")));
+
extern __inline __attribute__ ((__always_inline__)) __attribute__
((__gnu_inline__)) __attribute__ ((__artificial__)) __attribute__
((__warn_unused_result__))
size_t
-fread (void *__restrict __ptr, size_t __size, size_t __n,
+local_fread (void *__restrict __ptr, size_t __size, size_t __n,
FILE *__restrict __stream)
{
if (__builtin_object_size (__ptr, 0) != (size_t) -1)
@@ -17,9 +20,9 @@
if (!__builtin_constant_p (__size)
|| !__builtin_constant_p (__n)
|| (__size | __n) >= (((size_t) 1) << (8 * sizeof (size_t) /
2)))
- return __fread_chk (__ptr, __builtin_object_size (__ptr, 0),
__size, __n, __stream);
+ return fread (__ptr, __builtin_object_size (__ptr, 0), __size,
__n, __stream);
if (__size * __n > __builtin_object_size (__ptr, 0))
- return __fread_chk_warn (__ptr, __builtin_object_size (__ptr,
0), __size, __n, __stream);
+ return fread_warn (__ptr, __builtin_object_size (__ptr, 0),
__size, __n, __stream);
}
}
@@ -28,6 +31,6 @@
int main ()
{
char file_contents[4096];
- /* We shouldn't get this resolved to a call to __fread_chk_warn. */
- return fread (file_contents, 1, nmemb, fp);
+ /* We shouldn't get this resolved to a call to fread_warn. */
+ return local_fread (file_contents, 1, nmemb, fp);
}