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-rw-r--r--gcc/testsuite/gcc.dg/Wstringop-overflow-27.c293
1 files changed, 293 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/Wstringop-overflow-27.c b/gcc/testsuite/gcc.dg/Wstringop-overflow-27.c
new file mode 100644
index 0000000..249ce2b
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/Wstringop-overflow-27.c
@@ -0,0 +1,293 @@
+/* PR middle-end/91582 - missing heap overflow detection for strcpy
+ PR middle-end/85484 - missing -Wstringop-overflow for strcpy with
+ a string of non-const length
+ { dg-do compile }
+ { dg-options "-O2 -Wall -Wno-array-bounds" } */
+
+typedef __SIZE_TYPE__ size_t;
+
+extern void* calloc (size_t, size_t);
+extern void* malloc (size_t);
+extern void* memcpy (void*, const void*, size_t);
+extern void* memset (void*, int, size_t);
+extern char* strcpy (char*, const char*);
+extern size_t strlen (const char*);
+
+void sink (void*);
+
+
+void test_memcpy_nowarn (const void *s, int i, size_t n)
+{
+ sink (memcpy (calloc (1, 1), s, 1));
+ sink (memcpy (calloc (1, 2), s, 1));
+ sink (memcpy (calloc (2, 1), s, 1));
+ sink (memcpy (calloc (3, 1), s, 2));
+ sink (memcpy (calloc (3, 1), "12", 2));
+ sink (memcpy (calloc (3, 1), s, 3));
+ sink (memcpy (calloc (3, 1), "12", 3));
+ sink (memcpy (calloc (i, 1), s, 1));
+ sink (memcpy (calloc (n, 1), s, 1));
+ sink (memcpy (calloc (1, n), "", 1));
+ sink (memcpy (calloc (1, i), "", 1));
+ sink (memcpy (calloc (i, 1), "123", 3));
+ sink (memcpy (calloc (n, 1), "123", 3));
+ sink (memcpy (calloc (1, i), "123456", 7));
+ sink (memcpy (calloc (1, n), "123456", 7));
+ sink (memcpy (calloc (n, 1), s, 12345));
+ sink (memcpy (calloc (1, n), s, n - 1));
+ sink (memcpy (calloc (n, 1), s, n));
+
+ sink (memcpy ((char*)calloc (1, 1) + i, "123", 1));
+ sink (memcpy ((char*)calloc (n, 1) + i, "123", n));
+
+ sink (memcpy ((char*)calloc (1, 1) + i, s, 1));
+ sink (memcpy ((char*)calloc (n, 1) + i, s, n));
+
+ sink (memcpy (malloc (1), s, 1));
+ sink (memcpy (malloc (2), s, 1));
+ sink (memcpy (malloc (3), s, 2));
+ sink (memcpy (malloc (3), "12", 2));
+ sink (memcpy (malloc (3), s, 3));
+ sink (memcpy (malloc (3), "12", 3));
+ sink (memcpy (malloc (n), s, 1));
+ sink (memcpy (malloc (n), "", 1));
+ sink (memcpy (malloc (n), "123", 3));
+ sink (memcpy (malloc (n), "123456", 7));
+ sink (memcpy (malloc (n), s, 12345));
+ sink (memcpy (malloc (n), s, n - 1));
+ sink (memcpy (malloc (n), s, n));
+
+ {
+ const int a[] = { 1, 2, 3, 4 };
+ void *p = (char*)malloc (sizeof a);
+ memcpy (p, a, sizeof a);
+ sink (p);
+ }
+
+ {
+ const int a[] = { 1, 2, 3, 4, 5 };
+ size_t nelts = sizeof a / sizeof *a;
+ int vla[nelts];
+ memcpy (vla, a, nelts * sizeof *vla);
+ sink (vla);
+ }
+}
+
+
+void test_memcpy_warn (const int *s, size_t n)
+{
+ {
+ void *p = (char*)malloc (0);
+ memcpy (p, s, 1); // { dg-warning "writing 1 byte into a region of size 0" }
+ sink (p);
+ }
+
+ {
+ void *p = (char*)malloc (1);
+ memcpy (p, s, 2); // { dg-warning "writing 2 bytes into a region of size 1" }
+ sink (p);
+ }
+
+ {
+ void *p = (char*)malloc (2);
+ memcpy (p, s, 3); // { dg-warning "writing 3 bytes into a region of size 2" }
+ sink (p);
+ }
+
+ {
+ void *p = (char*)malloc (3);
+ memcpy (p, s, 4); // { dg-warning "writing 4 bytes into a region of size 3" }
+ sink (p);
+ }
+
+ {
+ const int a[] = { 1, 2, 3, 4 };
+ void *p = (char*)malloc (sizeof *a);
+ memcpy (p, a, sizeof a); // { dg-warning "" }
+ sink (p);
+ }
+
+ {
+ const int a[] = { 1, 2, 3, 4, 5 };
+ size_t nelts = sizeof a / sizeof *a;
+ char vla[nelts];
+ memcpy (vla, a, nelts * sizeof *a); // { dg-warning "" }
+ sink (vla);
+ }
+
+ {
+ void *p = malloc (n);
+ memcpy (p, s, n * sizeof *s); // { dg-warning "\\\[-Wstringop-overflow" "" { xfail *-*-* } }
+ sink (p);
+ }
+}
+
+void test_memset_nowarn (int x, size_t n)
+{
+ sink (memset (calloc (1, 1), x, 1));
+ sink (memset (calloc (1, 2), x, 1));
+ sink (memset (calloc (2, 1), x, 1));
+ sink (memset (calloc (3, 1), x, 2));
+ sink (memset (calloc (3, 1), x, 3));
+ sink (memset (calloc (n, 1), x, 1));
+ sink (memset (calloc (n, 1), x, 12345));
+ sink (memset (calloc (1, n), x, n - 1));
+ sink (memset (calloc (n, 1), x, n));
+
+ sink (memset (malloc (1), x, 1));
+ sink (memset (malloc (2), x, 1));
+ sink (memset (malloc (3), x, 2));
+ sink (memset (malloc (3), x, 3));
+ sink (memset (malloc (n), x, 1));
+ sink (memset (malloc (n), x, 12345));
+ sink (memset (malloc (n), x, n - 1));
+ sink (memset (malloc (n), x, n));
+
+ {
+ const int a[] = { 1, 2, 3, 4 };
+ void *p = (char*)malloc (sizeof a);
+ memset (p, x, sizeof a);
+ sink (p);
+ }
+
+ {
+ const int a[] = { 1, 2, 3, 4, 5 };
+ size_t nelts = sizeof a / sizeof *a;
+ int vla[nelts];
+ memset (vla, x, nelts * sizeof *vla);
+ sink (vla);
+ }
+}
+
+
+void test_memset_warn (int x, size_t n)
+{
+ {
+ void *p = (char*)malloc (0);
+ memset (p, x, 1); // { dg-warning "writing 1 byte into a region of size 0" }
+ sink (p);
+ }
+
+ {
+ void *p = (char*)malloc (1);
+ memset (p, x, 2); // { dg-warning "writing 2 bytes into a region of size 1" }
+ sink (p);
+ }
+
+ {
+ void *p = (char*)malloc (2);
+ memset (p, x, 3); // { dg-warning "writing 3 bytes into a region of size 2" }
+ sink (p);
+ }
+
+ {
+ void *p = (char*)malloc (3);
+ memset (p, x, 4); // { dg-warning "writing 4 bytes into a region of size 3" }
+ sink (p);
+ }
+
+ {
+ const int a[] = { 1, 2, 3, 4 };
+ void *p = (char*)malloc (sizeof *a);
+ memset (p, 0, sizeof a); // { dg-warning "" }
+ sink (p);
+ }
+
+ {
+ const int a[] = { 1, 2, 3, 4, 5 };
+ size_t nelts = sizeof a / sizeof *a;
+ char vla[nelts];
+ memset (vla, 0, nelts * sizeof *a); // { dg-warning "" }
+ sink (vla);
+ }
+
+ {
+ void *p = malloc (n);
+ memset (p, x, n * sizeof (int)); // { dg-warning "\\\[-Wstringop-overflow" "" { xfail *-*-* } }
+ sink (p);
+ }
+}
+
+
+void test_strcpy_nowarn (const char *s)
+{
+ {
+ const char a[] = "12";
+ int n = strlen (a);
+ char *t = (char*)calloc (2, n);
+ strcpy (t, a);
+ sink (t);
+ }
+
+ {
+ const char a[] = "123";
+ unsigned n = strlen (a) + 1;
+ char *t = (char*)calloc (n, 1);
+ strcpy (t, a);
+ sink (t);
+ }
+
+ {
+ const char a[] = "1234";
+ size_t n = strlen (a) * 2;
+ char *t = (char*)malloc (n);
+ strcpy (t, a);
+ sink (t);
+ }
+
+ {
+ const char a[] = "1234";
+ size_t len = strlen (a) + 1;
+ char vla[len];
+ strcpy (vla, a);
+ sink (vla);
+ }
+
+ {
+ size_t n = strlen (s) + 1;
+ char *t = (char*)malloc (n);
+ strcpy (t, s);
+ sink (t);
+ }
+}
+
+
+void test_strcpy_warn (const char *s)
+{
+ {
+ const char a[] = "123";
+ /* Verify that using signed int for the strlen result works (i.e.,
+ that the conversion from signed int to size_t doesn't prevent
+ the detection. */
+ int n = strlen (a);
+ char *t = (char*)calloc (n, 1); // { dg-message "at offset 0 to an object with size 3 allocated by 'calloc' here" "calloc note" { xfail *-*-* } }
+ // { dg-message "at offset 0 to an object with size at most 3 allocated by 'calloc' here" "calloc note" { target *-*-* } .-1 }
+ strcpy (t, a); // { dg-warning "writing 4 bytes into a region of size (between 0 and )?3 " }
+
+ sink (t);
+ }
+
+ {
+ const char a[] = "1234";
+ size_t n = strlen (a);
+ char *t = (char*)malloc (n); // { dg-message "at offset 0 to an object with size 4 allocated by 'malloc' here" "malloc note" { xfail *-*-* } }
+ // { dg-message "at offset 0 to an object with size at most 4 allocated by 'malloc' here" "malloc note" { target *-*-* } .-1 }
+ strcpy (t, a); // { dg-warning "writing 5 bytes into a region of size (between 0 and )?4 " }
+ sink (t);
+ }
+
+ // Exercise PR middle-end/85484.
+ {
+ size_t len = strlen (s);
+ char vla[len]; // { dg-message "at offset 0 to an object declared here" "vla note" }
+ strcpy (vla, s); // { dg-warning "writing one too many bytes into a region of a size that depends on 'strlen'" }
+ sink (vla);
+ }
+
+ {
+ size_t n = strlen (s);
+ char *t = (char*)malloc (n); // { dg-message "at offset 0 to an object allocated by 'malloc' here" "malloc note" }
+ strcpy (t, s); // { dg-warning "writing one too many bytes into a region of a size that depends on 'strlen'" }
+ sink (t);
+ }
+}
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