Function TestMallocFree

tests/runtime_wasi/malloc_test.go:77–126

(t *testing.T)

}

func TestMallocFree(t *testing.T) {
	tests := []struct {
		name      string
		getBuffer func() uintptr
		content   string
	}{
		{
			name:      "malloc",
			getBuffer: getFilledBuffer_malloc,
			content:   "panda",
		},
		{
			name:      "calloc",
			getBuffer: getFilledBuffer_calloc,
			content:   "pandabears",
		},
		{
			name:      "realloc",
			getBuffer: getFilledBuffer_realloc,
			content:   "pandabear",
		},
		{
			name:      "realloc nil",
			getBuffer: getFilledBuffer_reallocNil,
			content:   "panda",
		},
	}

	for _, tc := range tests {
		tt := tc
		t.Run(tt.name, func(t *testing.T) {
			bufPtr := tt.getBuffer()
			// Don't use defer to free the buffer as it seems to cause the GC to track it.

			// Churn GC, the pointer should still be valid until free is called.
			for i := 0; i < 1000; i++ {
				a := "hello" + strconv.Itoa(i)
				// Some conditional logic to ensure optimization doesn't remove the loop completely.
				if len(a) < 0 {
					break
				}
				runtime.GC()
			}

			checkFilledBuffer(t, bufPtr, tt.content)

			libc_free(unsafe.Pointer(bufPtr))
		})
	}
}