| /* { dg-additional-options "-fdiagnostics-text-art-charset=unicode" } */ |
| /* { dg-skip-if "requires hosted libstdc++ for stdlib size_t" { ! hostedlib } } */ |
| |
| #include <stdlib.h> |
| #include <stdint.h> |
| |
| /* Gap of 4, then an overflow of 4. */ |
| |
| void test2 (size_t size) |
| { |
| int32_t *buf = (int32_t *) __builtin_malloc (size * sizeof(int32_t)); /* { dg-message "\\(1\\) capacity: 'size \\* 4' bytes" "" { target c } } */ |
| /* { dg-message "\\(1\\) capacity: '\\(size \\* 4\\)' bytes" "" { target c++ } .-1 } */ |
| if (!buf) return; |
| |
| buf[size + 1] = 42; /* { dg-warning "heap-based buffer overflow" } */ |
| __builtin_free (buf); |
| } |
| |
| /* { dg-begin-multiline-output "" } |
| |
| ┌───────────────────────┐ |
| │write of '(int32_t) 42'│ |
| └───────────────────────┘ |
| │ |
| │ |
| v |
| ┌───────────────────────────────┐ ┌───────────────────────┐ |
| │buffer allocated on heap at (1)│ │ after valid range │ |
| └───────────────────────────────┘ └───────────────────────┘ |
| ├───────────────┬───────────────┤├─────┬──────┤├───────────┬───────────┤ |
| │ │ │ |
| ╭─────────────┴────────────╮ ╭───┴───╮ ╭─────────┴─────────╮ |
| │capacity: 'size * 4' bytes│ │4 bytes│ │overflow of 4 bytes│ |
| ╰──────────────────────────╯ ╰───────╯ ╰───────────────────╯ |
| |
| { dg-end-multiline-output "" } */ |
