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| author | Jakub Jelinek <jakub@redhat.com> | 2022-02-04 18:30:59 +0100 |
|---|---|---|
| committer | Jakub Jelinek <jakub@redhat.com> | 2022-02-04 18:30:59 +0100 |
| commit | 8d6fffc4bcd4afa0beb0efad4f3b95394aa15618 (patch) | |
| tree | 2da01478bcc60232f7bc6e6cecce6d81f60673ff | |
| parent | 1f722e35ab3805de6eeace770508a9085944e93e (diff) | |
| download | gcc-8d6fffc4bcd4afa0beb0efad4f3b95394aa15618.zip gcc-8d6fffc4bcd4afa0beb0efad4f3b95394aa15618.tar.gz gcc-8d6fffc4bcd4afa0beb0efad4f3b95394aa15618.tar.bz2 | |
rs6000: Fix up -D_FORTIFY_SOURCE* with -mabi=ieeelongdouble [PR104380]
The following testcase FAILs when configured with
--with-long-double-format=ieee . Only happens in the -std=c* modes, not the
GNU modes; while the glibc headers have __asm redirects of
vsnprintf and __vsnprinf_chk to __vsnprintfieee128 and
__vsnprintf_chkieee128, the vsnprintf fortification extern inline gnu_inline
always_inline wrapper calls __builtin_vsnprintf_chk and we actually emit
a call to __vsnprinf_chk (i.e. with IBM extended long double) instead of
__vsnprintf_chkieee128.
rs6000_mangle_decl_assembler_name already had cases for *printf and *scanf,
so this just adds another case for *printf_chk. *scanf_chk doesn't exist.
__ prefixing isn't done because *printf_chk already starts with __.
2022-02-04 Jakub Jelinek <jakub@redhat.com>
PR target/104380
* config/rs6000/rs6000.cc (rs6000_mangle_decl_assembler_name): Also
adjust mangling of __builtin*printf_chk.
* gcc.dg/pr104380.c: New test.
| -rw-r--r-- | gcc/config/rs6000/rs6000.cc | 5 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/pr104380.c | 32 |
2 files changed, 37 insertions, 0 deletions
diff --git a/gcc/config/rs6000/rs6000.cc b/gcc/config/rs6000/rs6000.cc index b6f2309..d9fc67d 100644 --- a/gcc/config/rs6000/rs6000.cc +++ b/gcc/config/rs6000/rs6000.cc @@ -28069,6 +28069,7 @@ rs6000_mangle_decl_assembler_name (tree decl, tree id) { size_t printf_len = strlen ("printf"); size_t scanf_len = strlen ("scanf"); + size_t printf_chk_len = strlen ("printf_chk"); if (len >= printf_len && strcmp (name + len - printf_len, "printf") == 0) @@ -28078,6 +28079,10 @@ rs6000_mangle_decl_assembler_name (tree decl, tree id) && strcmp (name + len - scanf_len, "scanf") == 0) newname = xasprintf ("__isoc99_%sieee128", name); + else if (len >= printf_chk_len + && strcmp (name + len - printf_chk_len, "printf_chk") == 0) + newname = xasprintf ("%sieee128", name); + else if (name[len - 1] == 'l') { bool uses_ieee128_p = false; diff --git a/gcc/testsuite/gcc.dg/pr104380.c b/gcc/testsuite/gcc.dg/pr104380.c new file mode 100644 index 0000000..54b2a87 --- /dev/null +++ b/gcc/testsuite/gcc.dg/pr104380.c @@ -0,0 +1,32 @@ +/* PR target/104380 */ +/* This test needs runtime that provides __*_chk functions. */ +/* { dg-do run { target *-*-linux* *-*-gnu* *-*-uclinux* } } */ +/* { dg-options "-O2 -std=c99" } */ + +#define FORTIFY_SOURCE 2 +#include <stdio.h> +#include <stdarg.h> + +static char buf[4096]; +static char gfmt[] = "%Lg"; + +static int __attribute__ ((noipa)) +foo (char *str, const char *fmt, ...) +{ + int ret; + va_list ap; + va_start (ap, fmt); + ret = vsnprintf (str, 4096, fmt, ap); + va_end (ap); + return ret; +} + +int +main () +{ + long double dval = 128.0L; + int ret = foo (buf, gfmt, dval); + if (ret != 3 || __builtin_strcmp (buf, "128") != 0) + __builtin_abort (); + return 0; +} |