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re PR c++/77321 (crash in warn_for_memset)

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PR c++/77321
	* c-common.c (warn_for_memset): Check type for null.

	* g++.dg/cpp1y/pr77321.C: New test.

From-SVN: r239676
This commit is contained in:
Marek Polacek 2016-08-22 21:53:59 +00:00 • committed by Marek Polacek
parent bb748b89df
commit b00e6e758a
4 changed files with 35 additions and 1 deletions
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5
gcc/c-family/ChangeLog
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@ -1,3 +1,8 @@
2016-08-22 Marek Polacek <polacek@redhat.com>
PR c++/77321
* c-common.c (warn_for_memset): Check type for null.
2016-08-22 Joseph Myers <joseph@codesourcery.com>
* c-family/c-cppbuiltin.c (c_cpp_builtins): Check _FloatN and

2
gcc/c-family/c-common.c
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@ -11991,7 +11991,7 @@ warn_for_memset (location_t loc, tree arg0, tree arg2,
if (TREE_CODE (arg0) == ADDR_EXPR)
arg0 = TREE_OPERAND (arg0, 0);
tree type = TREE_TYPE (arg0);
if (TREE_CODE (type) == ARRAY_TYPE)
if (type != NULL_TREE && TREE_CODE (type) == ARRAY_TYPE)
{
tree elt_type = TREE_TYPE (type);
tree domain = TYPE_DOMAIN (type);

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2016-08-22 Marek Polacek <polacek@redhat.com>
PR c++/77321
* g++.dg/cpp1y/pr77321.C: New test.
2016-08-22 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/60774

24
gcc/testsuite/g++.dg/cpp1y/pr77321.C Normal file
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@ -0,0 +1,24 @@
// PR c++/77321
// { dg-do compile { target c++14 } }
// { dg-options "-Wall" }
extern "C" void *memset (void *, int, __SIZE_TYPE__);
extern "C" void *malloc(__SIZE_TYPE__);
struct S {
char *a;
};
template <typename T>
void Test(T & Obj) {
auto && a(Obj.a);
a = (char*)::malloc(1024 * 1024);
::memset(a + 28, 'X', 6);
}
int main()
{
S d;
Test(d);
return 0;
}