Function HasEnableJemallocProfile

src/brpc/details/jemalloc_profiler.cpp:70–79

env need MALLOC_CONF="prof:true" before process start

// env need MALLOC_CONF="prof:true" before process start
static bool HasEnableJemallocProfile() {
    bool prof = false;
    size_t len = sizeof(prof);
    int ret = mallctl("opt.prof", &prof, &len, nullptr, 0);
    if (ret != 0) {
        LOG(WARNING) << "mallctl get opt.prof err, ret:" << ret;
        return false;
    }
    return prof;
}

static void WriteCb(void *opaque, const char *str) {
    // maybe call n times WriteCb by single malloc_stats_print