| 29 | } |
| 30 | |
| 31 | void basics() { |
| 32 | stage("basics"); |
| 33 | stage("allocate 0"); |
| 34 | void* ptr = malloc(0); |
| 35 | assert(ptr != 0); |
| 36 | free(ptr); |
| 37 | stage("allocate 100"); |
| 38 | void* first = malloc(100); |
| 39 | stage("free 100"); |
| 40 | free(first); |
| 41 | stage("allocate another 100"); |
| 42 | void* second = malloc(100); |
| 43 | stage("allocate 10"); |
| 44 | #ifndef WASMFS |
| 45 | // There is no strict guarantee that the second allocation be equal to the |
| 46 | // first, but in practice on a fresh heap that tends to be the case. With |
| 47 | // WasmFS, however, the heap has already seen a bunch of use by the time we |
| 48 | // get here, and due to fragmentation etc. we cannot predict getting the exact |
| 49 | // same result the second time. |
| 50 | assert(second == first); |
| 51 | #endif |
| 52 | void* third = malloc(10); |
| 53 | assert(!emmalloc_validate_memory_regions()); |
| 54 | stage("allocate 10 more"); |
| 55 | void* four = malloc(10); |
| 56 | assert(!emmalloc_validate_memory_regions()); |
| 57 | stage("free the first"); |
| 58 | free(second); |
| 59 | stage("free all"); |
| 60 | free(third); |
| 61 | free(four); |
| 62 | assert(!emmalloc_validate_memory_regions()); |
| 63 | } |
| 64 | |
| 65 | void previous_sbrk() { |
| 66 | stage("previous_sbrk"); |