diff options
Diffstat (limited to 'gcc/testsuite/gcc.dg/warn-stpcpy-no-nul.c')
| -rw-r--r-- | gcc/testsuite/gcc.dg/warn-stpcpy-no-nul.c | 324 |
1 files changed, 324 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/warn-stpcpy-no-nul.c b/gcc/testsuite/gcc.dg/warn-stpcpy-no-nul.c new file mode 100644 index 0000000..78c4a7f --- /dev/null +++ b/gcc/testsuite/gcc.dg/warn-stpcpy-no-nul.c @@ -0,0 +1,324 @@ +/* PR tree-optimization/86552 - missing warning for reading past the end + of non-string arrays + { dg-do compile } + { dg-options "-O2 -Wall -Wno-array-bounds -ftrack-macro-expansion=0" } */ + +extern char* stpcpy (char*, const char*); + +const char a[5] = "12345"; /* { dg-message "declared here" } */ + +int v0 = 0; +int v1 = 1; +int v2 = 1; +int v3 = 1; + +void sink (char*, ...); + +#define T(str) sink (stpcpy (d, str)) + +void test_one_dim_array (char *d) +{ + T (a); /* { dg-warning "argument missing terminating nul" } */ + T (&a[0]); /* { dg-warning "nul" } */ + T (&a[0] + 1); /* { dg-warning "nul" } */ + T (&a[1]); /* { dg-warning "nul" } */ + + int i0 = 0; + int i1 = i0 + 1; + + T (&a[i0]); /* { dg-warning "nul" } */ + T (&a[i0] + 1); /* { dg-warning "nul" } */ + T (&a[i1]); /* { dg-warning "nul" } */ + + T (&a[v0]); /* { dg-warning "nul" } */ + T (&a[v0] + 1); /* { dg-warning "nul" } */ + T (&a[v0] + v1); /* { dg-warning "nul" } */ +} + +const char b[][5] = { /* { dg-message "declared here" } */ + "12", "123", "1234", "54321" +}; + +void test_two_dim_array (char *d) +{ + int i0 = 0; + int i1 = i0 + 1; + int i2 = i1 + 1; + int i3 = i2 + 1; + + T (b[0]); + T (b[1]); + T (b[2]); + T (b[3]); /* { dg-warning "nul" } */ + T (b[i0]); + T (b[i1]); + T (b[i2]); + T (b[i3]); /* { dg-warning "nul" } */ + T (b[v0]); + T (b[v3]); + + T (&b[2][1]); + T (&b[2][1] + 1); + T (&b[2][v0]); + T (&b[2][1] + v0); + + T (&b[i2][i1]); + T (&b[i2][i1] + i1); + T (&b[i2][v0]); + T (&b[i2][i1] + v0); + + T (&b[3][1]); /* { dg-warning "nul" } */ + T (&b[3][1] + 1); /* { dg-warning "nul" } */ + T (&b[3][v0]); /* { dg-warning "nul" } */ + T (&b[3][1] + v0); /* { dg-warning "nul" } */ + T (&b[3][v0] + v1); /* { dg-warning "nul" "bug ???" { xfail *-*-* } } */ + + T (&b[i3][i1]); /* { dg-warning "nul" } */ + T (&b[i3][i1] + i1); /* { dg-warning "nul" } */ + T (&b[i3][v0]); /* { dg-warning "nul" } */ + T (&b[i3][i1] + v0); /* { dg-warning "nul" } */ + T (&b[i3][v0] + v1); /* { dg-warning "nul" "bug ???" { xfail *-*-* } } */ + + T (v0 ? "" : b[0]); + T (v0 ? "" : b[1]); + T (v0 ? "" : b[2]); + T (v0 ? "" : b[3]); /* { dg-warning "nul" "bug ???" { xfail *-*-* } } */ + T (v0 ? b[0] : ""); + T (v0 ? b[1] : ""); + T (v0 ? b[2] : ""); + T (v0 ? b[3] : ""); /* { dg-warning "nul" "bug ???" { xfail *-*-* } } */ + + T (v0 ? "1234" : b[3]); /* { dg-warning "nul" "bug ???" { xfail *-*-* } } */ + T (v0 ? b[3] : "1234"); /* { dg-warning "nul" "bug ???" { xfail *-*-* } } */ + + T (v0 ? a : b[3]); /* { dg-warning "nul" "bug ???" { xfail *-*-* } } */ + T (v0 ? b[0] : b[2]); + T (v0 ? b[2] : b[3]); /* { dg-warning "nul" "bug ???" { xfail *-*-* } } */ + T (v0 ? b[3] : b[2]); /* { dg-warning "nul" "bug ???" { xfail *-*-* } } */ + + T (v0 ? b[0] : &b[3][0] + 1); /* { dg-warning "nul" "bug ???" { xfail *-*-* } } */ + T (v0 ? b[1] : &b[3][1] + v0); /* { dg-warning "nul" "bug ???" { xfail *-*-* } } */ + + /* It's possible to detect the missing nul in the following two + expressions but GCC doesn't do it yet. */ + T (v0 ? &b[3][1] + v0 : b[2]); /* { dg-warning "nul" "bug ???" { xfail *-*-* } } */ + T (v0 ? &b[3][v0] : &b[3][v1]); /* { dg-warning "nul" "bug ???" { xfail *-*-* } } */ +} + +struct A { char a[5], b[5]; }; + +const struct A s = { "1234", "12345" }; + +void test_struct_member (char *d) +{ + int i0 = 0; + int i1 = i0 + 1; + + T (s.a); + T (&s.a[0]); + T (&s.a[0] + 1); + T (&s.a[0] + i0); + T (&s.a[1]); + T (&s.a[1] + 1); + T (&s.a[1] + i0); + + T (&s.a[i0]); + T (&s.a[i0] + 1); + T (&s.a[i0] + v0); + T (&s.a[i1]); + T (&s.a[i1] + 1); + T (&s.a[i1] + v0); + + T (s.a); + T (&s.a[0]); + T (&s.a[0] + 1); + T (&s.a[0] + v0); + T (&s.a[1]); + T (&s.a[1] + 1); + T (&s.a[1] + v0); + + T (&s.a[i0]); + T (&s.a[i0] + 1); + T (&s.a[i0] + v0); + T (&s.a[i1]); + T (&s.a[i1] + 1); + T (&s.a[i1] + v0); + + T (&s.a[v0]); + T (&s.a[v0] + 1); + T (&s.a[v0] + v0); + T (&s.a[v1]); + T (&s.a[v1] + 1); + T (&s.a[v1] + v0); + + T (s.b); /* { dg-warning "nul" } */ + T (&s.b[0]); /* { dg-warning "nul" } */ + T (&s.b[0] + 1); /* { dg-warning "nul" } */ + T (&s.b[0] + i0); /* { dg-warning "nul" } */ + T (&s.b[1]); /* { dg-warning "nul" } */ + T (&s.b[1] + 1); /* { dg-warning "nul" } */ + T (&s.b[1] + i0); /* { dg-warning "nul" } */ + + T (s.b); /* { dg-warning "nul" } */ + T (&s.b[0]); /* { dg-warning "nul" } */ + T (&s.b[0] + 1); /* { dg-warning "nul" } */ + T (&s.b[0] + v0); /* { dg-warning "nul" } */ + T (&s.b[1]); /* { dg-warning "nul" } */ + T (&s.b[1] + 1); /* { dg-warning "nul" } */ + T (&s.b[1] + v0); /* { dg-warning "nul" } */ + + T (s.b); /* { dg-warning "nul" } */ + T (&s.b[v0]); /* { dg-warning "nul" "bug ???" { xfail *-*-* } } */ + T (&s.b[v0] + 1); /* { dg-warning "nul" "bug ???" { xfail *-*-* } } */ + T (&s.b[v0] + v0); /* { dg-warning "nul" "bug ???" { xfail *-*-* } } */ + T (&s.b[v1]); /* { dg-warning "nul" "bug ???" { xfail *-*-* } } */ + T (&s.b[v1] + 1); /* { dg-warning "nul" "bug ???" { xfail *-*-* } } */ + T (&s.b[v1] + v0); /* { dg-warning "nul" "bug ???" { xfail *-*-* } } */ +} + +struct B { struct A a[2]; }; + +const struct B ba[] = { + { { { "123", "12345" }, { "12345", "123" } } }, + { { { "12345", "123" }, { "123", "12345" } } }, + { { { "1", "12" }, { "123", "1234" } } }, + { { { "123", "1234" }, { "12345", "12" } } } +}; + +void test_array_of_structs (char *d) +{ + T (ba[0].a[0].a); + T (&ba[0].a[0].a[0]); + T (&ba[0].a[0].a[0] + 1); + T (&ba[0].a[0].a[0] + v0); + T (&ba[0].a[0].a[1]); + T (&ba[0].a[0].a[1] + 1); + T (&ba[0].a[0].a[1] + v0); + + T (ba[0].a[0].b); /* { dg-warning "nul" } */ + T (&ba[0].a[0].b[0]); /* { dg-warning "nul" } */ + T (&ba[0].a[0].b[0] + 1); /* { dg-warning "nul" } */ + T (&ba[0].a[0].b[0] + v0); /* { dg-warning "nul" } */ + T (&ba[0].a[0].b[1]); /* { dg-warning "nul" } */ + T (&ba[0].a[0].b[1] + 1); /* { dg-warning "nul" } */ + T (&ba[0].a[0].b[1] + v0); /* { dg-warning "nul" } */ + + T (ba[0].a[1].a); /* { dg-warning "nul" } */ + T (&ba[0].a[1].a[0]); /* { dg-warning "nul" } */ + T (&ba[0].a[1].a[0] + 1); /* { dg-warning "nul" } */ + T (&ba[0].a[1].a[0] + v0); /* { dg-warning "nul" } */ + T (&ba[0].a[1].a[1]); /* { dg-warning "nul" } */ + T (&ba[0].a[1].a[1] + 1); /* { dg-warning "nul" } */ + T (&ba[0].a[1].a[1] + v0); /* { dg-warning "nul" } */ + + T (ba[0].a[1].b); + T (&ba[0].a[1].b[0]); + T (&ba[0].a[1].b[0] + 1); + T (&ba[0].a[1].b[0] + v0); + T (&ba[0].a[1].b[1]); + T (&ba[0].a[1].b[1] + 1); + T (&ba[0].a[1].b[1] + v0); + + + T (ba[1].a[0].a); /* { dg-warning "nul" } */ + T (&ba[1].a[0].a[0]); /* { dg-warning "nul" } */ + T (&ba[1].a[0].a[0] + 1); /* { dg-warning "nul" } */ + T (&ba[1].a[0].a[0] + v0); /* { dg-warning "nul" } */ + T (&ba[1].a[0].a[1]); /* { dg-warning "nul" } */ + T (&ba[1].a[0].a[1] + 1); /* { dg-warning "nul" } */ + T (&ba[1].a[0].a[1] + v0); /* { dg-warning "nul" } */ + + T (ba[1].a[0].b); + T (&ba[1].a[0].b[0]); + T (&ba[1].a[0].b[0] + 1); + T (&ba[1].a[0].b[0] + v0); + T (&ba[1].a[0].b[1]); + T (&ba[1].a[0].b[1] + 1); + T (&ba[1].a[0].b[1] + v0); + + T (ba[1].a[1].a); + T (&ba[1].a[1].a[0]); + T (&ba[1].a[1].a[0] + 1); + T (&ba[1].a[1].a[0] + v0); + T (&ba[1].a[1].a[1]); + T (&ba[1].a[1].a[1] + 1); + T (&ba[1].a[1].a[1] + v0); + + T (ba[1].a[1].b); /* { dg-warning "nul" } */ + T (&ba[1].a[1].b[0]); /* { dg-warning "nul" } */ + T (&ba[1].a[1].b[0] + 1); /* { dg-warning "nul" } */ + T (&ba[1].a[1].b[0] + v0); /* { dg-warning "nul" } */ + T (&ba[1].a[1].b[1]); /* { dg-warning "nul" } */ + T (&ba[1].a[1].b[1] + 1); /* { dg-warning "nul" } */ + T (&ba[1].a[1].b[1] + v0); /* { dg-warning "nul" } */ + + + T (ba[2].a[0].a); + T (&ba[2].a[0].a[0]); + T (&ba[2].a[0].a[0] + 1); + T (&ba[2].a[0].a[0] + v0); + T (&ba[2].a[0].a[1]); + T (&ba[2].a[0].a[1] + 1); + T (&ba[2].a[0].a[1] + v0); + + T (ba[2].a[0].b); + T (&ba[2].a[0].b[0]); + T (&ba[2].a[0].b[0] + 1); + T (&ba[2].a[0].b[0] + v0); + T (&ba[2].a[0].b[1]); + T (&ba[2].a[0].b[1] + 1); + T (&ba[2].a[0].b[1] + v0); + + T (ba[2].a[1].a); + T (&ba[2].a[1].a[0]); + T (&ba[2].a[1].a[0] + 1); + T (&ba[2].a[1].a[0] + v0); + T (&ba[2].a[1].a[1]); + T (&ba[2].a[1].a[1] + 1); + T (&ba[2].a[1].a[1] + v0); + + + T (ba[3].a[0].a); + T (&ba[3].a[0].a[0]); + T (&ba[3].a[0].a[0] + 1); + T (&ba[3].a[0].a[0] + v0); + T (&ba[3].a[0].a[1]); + T (&ba[3].a[0].a[1] + 1); + T (&ba[3].a[0].a[1] + v0); + + T (ba[3].a[0].b); + T (&ba[3].a[0].b[0]); + T (&ba[3].a[0].b[0] + 1); + T (&ba[3].a[0].b[0] + v0); + T (&ba[3].a[0].b[1]); + T (&ba[3].a[0].b[1] + 1); + T (&ba[3].a[0].b[1] + v0); + + T (ba[3].a[1].a); /* { dg-warning "nul" } */ + T (&ba[3].a[1].a[0]); /* { dg-warning "nul" } */ + T (&ba[3].a[1].a[0] + 1); /* { dg-warning "nul" } */ + T (&ba[3].a[1].a[0] + v0); /* { dg-warning "nul" } */ + T (&ba[3].a[1].a[1]); /* { dg-warning "nul" } */ + T (&ba[3].a[1].a[1] + 1); /* { dg-warning "nul" } */ + T (&ba[3].a[1].a[1] + v0); /* { dg-warning "nul" } */ + + T (ba[3].a[1].b); + T (&ba[3].a[1].b[0]); + T (&ba[3].a[1].b[0] + 1); + T (&ba[3].a[1].b[0] + v0); + T (&ba[3].a[1].b[1]); + T (&ba[3].a[1].b[1] + 1); + T (&ba[3].a[1].b[1] + v0); + + + T (v0 ? ba[0].a[0].a : ba[0].a[0].b); /* { dg-warning "nul" "bug ???" { xfail *-*-* } } */ + T (v0 ? ba[0].a[0].a : ba[0].a[0].b); /* { dg-warning "nul" "bug ???" { xfail *-*-* } } */ + + T (v0 ? &ba[0].a[0].a[0] : &ba[3].a[1].a[0]); /* { dg-warning "nul" "bug ???" { xfail *-*-* } } */ + T (v0 ? &ba[3].a[1].a[1] : ba[0].a[0].a); /* { dg-warning "nul" "bug ???" { xfail *-*-* } } */ + + T (v0 ? ba[0].a[0].a : ba[0].a[1].b); + T (v0 ? ba[0].a[1].b : ba[0].a[0].a); +} + +/* { dg-prune-output " reading \[1-9\]\[0-9\]? bytes from a region " } */ |