| /* PR tree-optimization/86552 - missing warning for reading past the end |
| of non-string arrays |
| { dg-do compile } |
| { dg-options "-O2 -Wall -ftrack-macro-expansion=0" } */ |
| |
| typedef __SIZE_TYPE__ size_t; |
| extern size_t strnlen (const char*, size_t); |
| |
| const char a[5] = "12345"; /* { dg-message "declared here" } */ |
| enum { asz = sizeof a }; |
| |
| int v0 = 0; |
| int v1 = 1; |
| |
| void sink (int, ...); |
| |
| #define CONCAT(a, b) a ## b |
| #define CAT(a, b) CONCAT(a, b) |
| |
| #define T(str, n) \ |
| __attribute__ ((noipa)) \ |
| void CAT (test_, __LINE__) (void) { \ |
| int i0 = 0, i1 = i0 + 1, i2 = i1 + 1, i3 = i2 + 1; \ |
| sink (strnlen (str, n), i0, i1, i2, i3); \ |
| } typedef void dummy_type |
| |
| T (a, asz); |
| T (a, asz - 1); |
| T (a, asz - 2); |
| T (a, asz - 5); |
| T (&a[0], asz); |
| T (&a[0] + 1, asz); /* { dg-warning "specified bound 5 exceeds the size 4 of unterminated array" } */ |
| T (&a[1], asz); /* { dg-warning "specified bound 5 exceeds the size 4 of unterminated array" } */ |
| T (&a[1], asz - 1); |
| T (&a[v0], asz); /* { dg-warning "specified bound 5 may exceed the size of at most 5 of unterminated array" } */ |
| T (&a[v0] + 1, asz); /* { dg-warning "specified bound 5 may exceed the size of at most 5 of unterminated array" } */ |
| |
| T (a, asz + 1); /* { dg-warning "specified bound 6 exceeds the size 5 of unterminated array" } */ |
| T (&a[0], asz + 1); /* { dg-warning "unterminated" } */ |
| T (&a[0] + 1, asz - 1); |
| T (&a[0] + 1, asz + 1); /* { dg-warning "unterminated" } */ |
| T (&a[1], asz + 1); /* { dg-warning "unterminated" } */ |
| T (&a[v0], asz + 1); /* { dg-warning "unterminated" } */ |
| T (&a[v0] + 1, asz + 1); /* { dg-warning "unterminated" } */ |
| |
| |
| const char b[][5] = { /* { dg-message "declared here" } */ |
| "12", "123", "1234", "54321" |
| }; |
| enum { bsz = sizeof b[0] }; |
| |
| T (b[0], bsz); |
| T (b[1], bsz); |
| T (b[2], bsz); |
| T (b[3], bsz); |
| |
| T (b[0], bsz - 1); |
| T (b[1], bsz - 1); |
| T (b[2], bsz - 1); |
| T (b[3], bsz - 1); |
| |
| T (b[0], bsz + 1); |
| T (b[1], bsz + 1); |
| T (b[2], bsz + 1); |
| T (b[3], bsz + 1); /* { dg-warning "unterminated" } */ |
| |
| T (b[i0], bsz); |
| T (b[i1], bsz); |
| T (b[i2], bsz); |
| T (b[i3], bsz); |
| |
| T (b[i0], bsz + 1); |
| T (b[i1], bsz + 1); |
| T (b[i2], bsz + 1); |
| T (b[i3], bsz + 1); /* { dg-warning "unterminated" } */ |
| |
| T (b[v0], bsz); |
| T (b[v0], bsz + 1); |
| |
| T (&b[i2][i1], bsz); |
| T (&b[i2][i1] + i1, bsz); |
| T (&b[i2][v0], bsz); |
| T (&b[i2][i1] + v0, bsz); |
| |
| T (&b[i2][i1], bsz + 1); |
| T (&b[i2][i1] + i1, bsz + 1); |
| T (&b[i2][v0], bsz + 1); |
| T (&b[i2][i1] + v0, bsz + 1); |
| |
| T (&b[2][1], bsz); |
| T (&b[2][1] + i1, bsz); |
| T (&b[2][i0], bsz); |
| T (&b[2][1] + i0, bsz); |
| T (&b[2][1] + v0, bsz); |
| T (&b[2][v0], bsz); |
| |
| T (&b[2][1], bsz + 1); |
| T (&b[2][1] + i1, bsz + 1); |
| T (&b[2][i0], bsz + 1); |
| T (&b[2][1] + i0, bsz + 1); |
| T (&b[2][1] + v0, bsz + 1); |
| T (&b[2][v0], bsz + 1); |
| |
| T (&b[3][1], bsz); /* { dg-warning "unterminated" } */ |
| T (&b[3][1], bsz - 1); |
| T (&b[3][1] + 1, bsz); /* { dg-warning "unterminated" } */ |
| T (&b[3][1] + 1, bsz - 1); /* { dg-warning "unterminated" } */ |
| T (&b[3][1] + 1, bsz - 2); |
| T (&b[3][1] + i1, bsz); /* { dg-warning "unterminated" } */ |
| T (&b[3][1] + i1, bsz - i1); /* { dg-warning "unterminated" } */ |
| T (&b[3][1] + i1, bsz - i2); |
| T (&b[3][v0], bsz); |
| T (&b[3][1] + v0, bsz); /* { dg-warning "specified bound 5 exceeds the size of at most 4 of unterminated array" } */ |
| T (&b[3][v0] + v1, bsz); /* { dg-warning "specified bound 5 may exceed the size of at most 4 of unterminated array" "pr?????" { xfail *-*-* } } */ |
| |
| T (&b[3][1], bsz + 1); /* { dg-warning "unterminated" } */ |
| T (&b[3][1] + 1, bsz + 1); /* { dg-warning "unterminated" } */ |
| T (&b[3][1] + i1, bsz + 1); /* { dg-warning "unterminated" } */ |
| T (&b[3][v0], bsz + 1); /* { dg-warning "unterminated" "pr86936" { xfail *-*-* } } */ |
| T (&b[3][1] + v0, bsz + 1); /* { dg-warning "unterminated" } */ |
| T (&b[3][v0] + v1, bsz + 1); /* { dg-warning "unterminated" "pr86936" { xfail *-*-* } } */ |
| |
| T (&b[i3][i1], bsz); /* { dg-warning "unterminated" } */ |
| T (&b[i3][i1] + 1, bsz); /* { dg-warning "unterminated" } */ |
| T (&b[i3][i1] + i1, bsz); /* { dg-warning "specified bound 5 exceeds the size 3 of unterminated array" } */ |
| T (&b[i3][v0], bsz); |
| T (&b[i3][i1] + v0, bsz); /* { dg-warning "specified bound 5 exceeds the size of at most 4 of unterminated array" } */ |
| T (&b[i3][v0] + v1, bsz); |
| |
| T (&b[i3][i1], bsz + 1); /* { dg-warning "unterminated" } */ |
| T (&b[i3][i1] + 1, bsz + 1); /* { dg-warning "unterminated" } */ |
| T (&b[i3][i1] + i1, bsz + 1); /* { dg-warning "unterminated" } */ |
| T (&b[i3][v0], bsz + 1); /* { dg-warning "unterminated" "pr86919" { xfail *-*-* } } */ |
| T (&b[i3][i1] + v0, bsz + 1); /* { dg-warning "unterminated" } */ |
| T (&b[i3][v0] + v1, bsz + 1); /* { dg-warning "unterminated" "pr86919" { xfail *-*-* } } */ |
| |
| T (v0 ? "" : b[0], bsz); |
| T (v0 ? "" : b[1], bsz); |
| T (v0 ? "" : b[2], bsz); |
| T (v0 ? "" : b[3], bsz); |
| T (v0 ? b[0] : "", bsz); |
| T (v0 ? b[1] : "", bsz); |
| T (v0 ? b[2] : "", bsz); |
| T (v0 ? b[3] : "", bsz); |
| |
| /* The warnings below are strictly correct but the strnlen calls are safe |
| because the reads are bounded by the length of the constant arguments. |
| It might make sense to relax the warning to avoid triggering for them. */ |
| T (v0 ? "" : b[0], bsz + 1); /* { dg-warning "bound 6 exceeds source size 5" } */ |
| T (v0 ? "" : b[1], bsz + 1); /* { dg-warning "bound 6 exceeds source size 5" } */ |
| T (v0 ? "" : b[2], bsz + 1); /* { dg-warning "bound 6 exceeds source size 5" } */ |
| T (v0 ? "" : b[3], bsz + 1); /* { dg-warning "bound 6 exceeds source size 5" } */ |
| T (v0 ? b[0] : "", bsz + 1); /* { dg-warning "bound 6 exceeds source size 5" } */ |
| T (v0 ? b[1] : "", bsz + 1); /* { dg-warning "bound 6 exceeds source size 5" } */ |
| T (v0 ? b[2] : "", bsz + 1); /* { dg-warning "bound 6 exceeds source size 5" } */ |
| T (v0 ? b[3] : "", bsz + 1); /* { dg-warning "bound 6 exceeds source size 5" } */ |
| |
| T (v0 ? "" : b[i0], bsz); |
| T (v0 ? "" : b[i1], bsz); |
| T (v0 ? "" : b[i2], bsz); |
| T (v0 ? "" : b[i3], bsz); |
| T (v0 ? b[i0] : "", bsz); |
| T (v0 ? b[i1] : "", bsz); |
| T (v0 ? b[i2] : "", bsz); |
| T (v0 ? b[i3] : "", bsz); |
| |
| T (v0 ? "" : b[i0], bsz + 1); |
| T (v0 ? "" : b[i1], bsz + 1); |
| T (v0 ? "" : b[i2], bsz + 1); |
| T (v0 ? "" : b[i3], bsz + 1); /* { dg-warning "bound 6 exceeds source size 5" "pr86937" } */ |
| T (v0 ? b[i0] : "", bsz + 1); |
| T (v0 ? b[i1] : "", bsz + 1); |
| T (v0 ? b[i2] : "", bsz + 1); |
| T (v0 ? b[i3] : "", bsz + 1); /* { dg-warning "bound 6 exceeds source size 5" "pr86937" } */ |
| |
| T (v0 ? "1234" : b[3], bsz); |
| T (v0 ? "1234" : b[i3], bsz); |
| T (v0 ? b[3] : "1234", bsz); |
| T (v0 ? b[i3] : "1234", bsz); |
| |
| T (v0 ? a : b[3], bsz); |
| T (v0 ? b[0] : b[2], bsz); |
| T (v0 ? b[2] : b[3], bsz); |
| T (v0 ? b[3] : b[2], bsz); |
| |
| T (v0 ? "1234" : b[3], bsz + 1); /* { dg-warning "bound 6 exceeds source size 5" } */ |
| T (v0 ? "1234" : b[i3], bsz + 1); /* { dg-warning "bound 6 exceeds source size 5" } */ |
| T (v0 ? b[3] : "1234", bsz + 1); /* { dg-warning "bound 6 exceeds source size 5" } */ |
| T (v0 ? b[i3] : "1234", bsz + 1); /* { dg-warning "bound 6 exceeds source size 5" } */ |
| |
| T (v0 ? a : b[3], bsz + 1); /* { dg-warning "bound 6 exceeds source size 5" } */ |
| T (v0 ? b[0] : b[2], bsz + 1); /* { dg-warning "bound 6 exceeds source size 5" } */ |
| T (v0 ? b[2] : b[3], bsz + 1); /* { dg-warning "bound 6 exceeds source size 5" } */ |
| T (v0 ? b[3] : b[2], bsz + 1); /* { dg-warning "bound 6 exceeds source size 5" } */ |
| |
| struct A { char a[5], b[5]; }; |
| |
| const struct A s = { "1234", "12345" }; |
| |
| T (s.a, asz); |
| T (&s.a[0], asz); |
| T (&s.a[0] + 1, asz); |
| T (&s.a[0] + v0, asz); |
| T (&s.a[1], asz); |
| T (&s.a[1] + 1, asz); |
| T (&s.a[1] + v0, asz); |
| |
| T (&s.a[i0], asz); |
| T (&s.a[i0] + i1, asz); |
| T (&s.a[i0] + v0, asz); |
| T (&s.a[i1], asz); |
| T (&s.a[i1] + i1, asz); |
| T (&s.a[i1] + v0, asz); |
| |
| T (s.a, asz + 1); |
| T (&s.a[0], asz + 1); |
| T (&s.a[0] + 1, asz + 1); |
| T (&s.a[0] + v0, asz + 1); /* { dg-warning "specified bound 6 exceeds source size 5 " } */ |
| T (&s.a[1], asz + 1); |
| T (&s.a[1] + 1, asz + 1); |
| T (&s.a[1] + v0, asz + 1); /* { dg-bogus "specified bound 6 exceeds source size 5" "pr95794" { xfail *-*-* } } */ |
| |
| T (&s.a[i0], asz + 1); |
| T (&s.a[i0] + i1, asz + 1); |
| T (&s.a[i0] + v0, asz + 1); |
| T (&s.a[i1], asz + 1); |
| T (&s.a[i1] + i1, asz + 1); |
| T (&s.a[i1] + v0, asz + 1); |
| |
| T (s.b, bsz); |
| T (&s.b[0], bsz); |
| T (&s.b[0] + 1, bsz); /* { dg-warning "unterminated" } */ |
| T (&s.b[0] + v0, bsz); /* { dg-warning "unterminated" } */ |
| T (&s.b[1], bsz); /* { dg-warning "unterminated" } */ |
| T (&s.b[1] + 1, bsz); /* { dg-warning "unterminated" } */ |
| T (&s.b[1] + v0, bsz); /* { dg-warning "unterminated" } */ |
| |
| T (&s.b[i0], bsz); |
| T (&s.b[i0] + i1, bsz); /* { dg-warning "unterminated" } */ |
| T (&s.b[i0] + v0, bsz); /* { dg-warning "unterminated" } */ |
| T (&s.b[i1], bsz); /* { dg-warning "unterminated" } */ |
| T (&s.b[i1] + i1, bsz); /* { dg-warning "unterminated" } */ |
| T (&s.b[i1] + v0, bsz); /* { dg-warning "unterminated" } */ |
| |
| T (s.b, bsz + 1); /* { dg-warning "unterminated" } */ |
| T (&s.b[0], bsz + 1); /* { dg-warning "unterminated" } */ |
| T (&s.b[0] + 1, bsz + 1); /* { dg-warning "unterminated" } */ |
| T (&s.b[0] + v0, bsz + 1); /* { dg-warning "unterminated" } */ |
| T (&s.b[1], bsz + 1); /* { dg-warning "unterminated" } */ |
| T (&s.b[1] + 1, bsz + 1); /* { dg-warning "unterminated" } */ |
| T (&s.b[1] + v0, bsz + 1); /* { dg-warning "unterminated" } */ |
| |
| T (&s.b[i0], bsz + 1); /* { dg-warning "unterminated" } */ |
| T (&s.b[i0] + i1, bsz + 1); /* { dg-warning "unterminated" } */ |
| T (&s.b[i0] + v0, bsz + 1); /* { dg-warning "unterminated" } */ |
| T (&s.b[i1], bsz + 1); /* { dg-warning "unterminated" } */ |
| T (&s.b[i1] + i1, bsz + 1); /* { dg-warning "unterminated" } */ |
| T (&s.b[i1] + v0, bsz + 1); /* { dg-warning "unterminated" } */ |
| |
| 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" } } } |
| }; |
| |
| T (ba[0].a[0].a, asz + 1); |
| T (&ba[0].a[0].a[0], asz + 1); |
| T (&ba[0].a[0].a[0] + 1, asz + 1); |
| T (&ba[0].a[0].a[0] + v0, asz + 1); /* { dg-bogus "specified bound 6 exceeds source size 5" pr95794" { xfail *-*-* } } */ |
| T (&ba[0].a[0].a[1], asz + 1); |
| T (&ba[0].a[0].a[1] + 1, asz + 1); |
| T (&ba[0].a[0].a[1] + v0, asz + 1); /* { dg-bogus "specified bound 6 exceeds source size 5" pr95794" { xfail *-*-* } } */ |
| |
| T (ba[0].a[0].b, bsz); |
| T (&ba[0].a[0].b[0], bsz); |
| T (&ba[0].a[0].b[0] + 1, bsz); /* { dg-warning "unterminated" } */ |
| T (&ba[0].a[0].b[0] + 1, bsz - 1); |
| T (&ba[0].a[0].b[0] + v0, bsz); /* { dg-warning "unterminated" } */ |
| T (&ba[0].a[0].b[1], bsz); /* { dg-warning "unterminated" } */ |
| T (&ba[0].a[0].b[1], bsz - 1); |
| T (&ba[0].a[0].b[1] + 1, bsz - 1); /* { dg-warning "unterminated" } */ |
| T (&ba[0].a[0].b[1] + 1, bsz - 2); |
| T (&ba[0].a[0].b[1] + 1, bsz); /* { dg-warning "unterminated" } */ |
| T (&ba[0].a[0].b[1] + v0, bsz); /* { dg-warning "unterminated" } */ |
| |
| T (ba[0].a[0].b, bsz + 1); /* { dg-warning "unterminated" } */ |
| T (&ba[0].a[0].b[0], bsz + 1); /* { dg-warning "unterminated" } */ |
| T (&ba[0].a[0].b[0] + 1, bsz + 1); /* { dg-warning "unterminated" } */ |
| T (&ba[0].a[0].b[0] + v0, bsz + 1); /* { dg-warning "unterminated" } */ |
| T (&ba[0].a[0].b[1], bsz + 1); /* { dg-warning "unterminated" } */ |
| T (&ba[0].a[0].b[1] + 1, bsz + 1); /* { dg-warning "unterminated" } */ |
| T (&ba[0].a[0].b[1] + v0, bsz + 1); /* { dg-warning "unterminated" } */ |
| |
| T (ba[0].a[1].a, asz + 1); /* { dg-warning "unterminated" } */ |
| T (&ba[0].a[1].a[0], asz + 1); /* { dg-warning "unterminated" } */ |
| T (&ba[0].a[1].a[0] + 1, asz + 1); /* { dg-warning "unterminated" } */ |
| T (&ba[0].a[1].a[0] + v0, asz + 1); /* { dg-warning "unterminated" } */ |
| T (&ba[0].a[1].a[1], asz + 1); /* { dg-warning "unterminated" } */ |
| T (&ba[0].a[1].a[1] + 1, asz + 1); /* { dg-warning "unterminated" } */ |
| T (&ba[0].a[1].a[1] + v0, asz + 1); /* { dg-warning "unterminated" } */ |
| |
| T (ba[0].a[1].b, bsz + 1); |
| T (&ba[0].a[1].b[0], bsz + 1); |
| T (&ba[0].a[1].b[0] + 1, bsz + 1); |
| T (&ba[0].a[1].b[0] + v0, bsz + 1); /* { dg-bogus "specified bound 6 exceeds source size 5" pr95794" { xfail *-*-* } } */ |
| T (&ba[0].a[1].b[1], bsz + 1); |
| T (&ba[0].a[1].b[1] + 1, bsz + 1); |
| T (&ba[0].a[1].b[1] + v0, bsz + 1); /* { dg-bogus "specified bound 6 exceeds source size 5" pr95794" { xfail *-*-* } } */ |
| |
| T (ba[1].a[0].a, asz); |
| T (&ba[1].a[0].a[0], asz); |
| T (&ba[1].a[0].a[0] + 1, asz); /* { dg-warning "unterminated" } */ |
| T (&ba[1].a[0].a[0] + v0, asz); /* { dg-warning "unterminated" } */ |
| T (&ba[1].a[0].a[1], asz); /* { dg-warning "unterminated" } */ |
| T (&ba[1].a[0].a[1] + 1, asz); /* { dg-warning "unterminated" } */ |
| T (&ba[1].a[0].a[1] + v0, asz); /* { dg-warning "unterminated" } */ |
| |
| T (ba[1].a[0].a, asz + 1); /* { dg-warning "unterminated" } */ |
| T (&ba[1].a[0].a[0], asz + 1); /* { dg-warning "unterminated" } */ |
| T (&ba[1].a[0].a[0] + 1, asz + 1); /* { dg-warning "unterminated" } */ |
| T (&ba[1].a[0].a[0] + v0, asz + 1); /* { dg-warning "unterminated" } */ |
| T (&ba[1].a[0].a[1], asz + 1); /* { dg-warning "unterminated" } */ |
| T (&ba[1].a[0].a[1] + 1, asz + 1); /* { dg-warning "unterminated" } */ |
| T (&ba[1].a[0].a[1] + v0, asz + 1); /* { dg-warning "unterminated" } */ |
| |
| T (ba[1].a[0].b, bsz); |
| T (&ba[1].a[0].b[0], bsz); |
| T (&ba[1].a[0].b[0] + 1, bsz); |
| T (&ba[1].a[0].b[0] + v0, bsz); |
| T (&ba[1].a[0].b[1], bsz); |
| T (&ba[1].a[0].b[1] + 1, bsz); |
| T (&ba[1].a[0].b[1] + v0, bsz); |
| |
| T (ba[1].a[1].a, asz); |
| T (&ba[1].a[1].a[0], asz); |
| T (&ba[1].a[1].a[0] + 1, asz); |
| T (&ba[1].a[1].a[0] + v0, asz); |
| T (&ba[1].a[1].a[1], asz); |
| T (&ba[1].a[1].a[1] + 1, asz); |
| T (&ba[1].a[1].a[1] + v0, asz); |
| |
| T (ba[1].a[1].b, bsz); |
| T (&ba[1].a[1].b[0], bsz); |
| T (&ba[1].a[1].b[0] + 1, bsz); /* { dg-warning "unterminated" } */ |
| T (&ba[1].a[1].b[0] + 1, bsz - 1); |
| T (&ba[1].a[1].b[0] + v0, bsz); /* { dg-warning "unterminated" } */ |
| T (&ba[1].a[1].b[1], bsz); /* { dg-warning "unterminated" } */ |
| T (&ba[1].a[1].b[1], bsz - 1); |
| T (&ba[1].a[1].b[1] + 1, bsz); /* { dg-warning "unterminated" } */ |
| T (&ba[1].a[1].b[1] + 1, bsz - 1); /* { dg-warning "unterminated" } */ |
| T (&ba[1].a[1].b[1] + 1, bsz - 2); |
| T (&ba[1].a[1].b[1] + 1, bsz - i2); |
| T (&ba[1].a[1].b[1] + v0, bsz); /* { dg-warning "unterminated" } */ |
| |
| /* Prune out warnings with no location (pr?????). |
| { dg-prune-output "cc1:" } */ |
