Function cbm_mem_phase_report_json

src/foundation/mem.c:764–802

}

int cbm_mem_phase_report_json(char *out, size_t size) {
    if (!out || size == 0) {
        return 0;
    }
    out[0] = '\0';
    if (!mem_phase_enabled()) {
        return 0;
    }
    mem_phase_slot_t copy[MEM_PHASE_SLOTS];
    int count = 0;
    cbm_mutex_lock(&g_mem_phase_mutex);
    count = g_mem_phase_count;
    memcpy(copy, g_mem_phases, sizeof(copy));
    cbm_mutex_unlock(&g_mem_phase_mutex);

    /* Biggest retainer first — insertion sort, count <= MEM_PHASE_SLOTS. */
    for (int i = 1; i < count; i++) {
        mem_phase_slot_t key = copy[i];
        int j = i - 1;
        while (j >= 0 && copy[j].bytes < key.bytes) {
            copy[j + 1] = copy[j];
            j--;
        }
        copy[j + 1] = key;
    }

    int length = 0;
    for (int i = 0; i < count && length >= 0 && (size_t)length < size; i++) {
        int written = snprintf(out + length, size - (size_t)length,
                               "%s{\"label\": \"%s\", \"bytes\": %lld, \"hits\": %lld}",
                               i == 0 ? "" : ", ", copy[i].label ? copy[i].label : "?",
                               (long long)copy[i].bytes, (long long)copy[i].hits);
        if (written < 0) {
            break;
        }
        length += written;
    }
    return length > 0 && (size_t)length < size ? length : 0;
}

/* ── Windows region census (see mem.h) ─────────────────────────────── */