| /* 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* strcpy (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 (strcpy (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" } */ |
| T (v0 ? b[0] : ""); |
| T (v0 ? b[1] : ""); |
| T (v0 ? b[2] : ""); |
| T (v0 ? b[3] : ""); /* { dg-warning "nul" } */ |
| |
| T (v0 ? "1234" : b[3]); /* { dg-warning "nul" } */ |
| T (v0 ? b[3] : "1234"); /* { dg-warning "nul" } */ |
| |
| T (v0 ? a : b[3]); /* { dg-warning "nul" } */ |
| T (v0 ? b[0] : b[2]); |
| T (v0 ? b[2] : b[3]); /* { dg-warning "nul" } */ |
| T (v0 ? b[3] : b[2]); /* { dg-warning "nul" } */ |
| |
| T (v0 ? b[0] : &b[3][0] + 1); /* { dg-warning "nul" } */ |
| T (v0 ? b[1] : &b[3][1] + v0); /* { dg-warning "nul" } */ |
| |
| /* It's possible to detect the missing nul in the following |
| expression 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" } */ |
| } |
| |
| 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 ???" } */ |
| T (v0 ? ba[0].a[0].a : ba[0].a[0].b); /* { dg-warning "nul" "bug ???" } */ |
| |
| T (v0 ? &ba[0].a[0].a[0] : &ba[3].a[1].a[0]); /* { dg-warning "nul" "bug ???" } */ |
| T (v0 ? &ba[3].a[1].a[1] : ba[0].a[0].a); /* { dg-warning "nul" "bug ???" } */ |
| |
| 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 " } */ |