C++ malloc_合并中的SIGABRT-函数是否可能返回NULL？

我使用以下代码登录ARM：

template <typename T>
MyClass& operator<<(T const& t)
{
    try
    {
        m_buffer << t;
    }
    catch (...)
    {
        /* No exceptions */
    }
    return *this;
}

有了瓦尔格林，我看不到任何奇怪的东西

---

LE：在中止过程中会打印以下消息：

malloc.c:5345:malloc\u合并：断言'p->fd\u nextsize->bk\u nextsize==p'失败

GCC文档清楚地表明，

\u函数

为您提供了未经修饰的函数名称。失败的唯一方法是，如果您不在函数中

---

很可能你在其他地方有UB，但就像现在的时尚一样，你没有提供UB，因此不可能有任何信心进一步帮助你。

为什么不说

（\uuuu函数？\uu函数：“奇怪的空指针”）

并检查一下

m\u缓冲区是什么？A
stringstream
？如果是，哪个？是的，这是一个
std:：stringstream
。实际的崩溃是什么？错误信息是什么？第一个堆栈帧是什么？除了您使用的是stringstream之外，我们无法从中分辨出任何东西。它总是相同的崩溃吗？或者偶尔出现故障的唯一常见部分是
new
/
malloc（）
还是
delete
/
free（）
？如果是后者，则表示您在某个地方发生了堆损坏。事实上，这种情况只发生过一次。我添加了完整的回溯。当然，该语句用于函数中。实际上，它在流创建期间崩溃了：似乎是函数长度+空终止符。对不起，我误导了你
myClass <<__FUNCTION__<< " some string and int" << 5;

Program terminated with signal 6, Aborted.
    #0  0x3695f46c in *__GI_raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:67
67  ../nptl/sysdeps/unix/sysv/linux/raise.c: No such file or directory.
    in ../nptl/sysdeps/unix/sysv/linux/raise.c
(gdb) bt full
    #0  0x3695f46c in *__GI_raise (sig=6) at   ../nptl/sysdeps/unix/sysv/linux/raise.c:67
        pid = <value optimized out>
        selftid = 1673
        res = <value optimized out>
    #1  0x36964d70 in *__GI_abort () at abort.c:92
        act = {__sigaction_handler = {sa_handler = 0, sa_sigaction = 0}, sa_mask = {__val = {0 <repeats 32 times>}}, sa_flags = 0, sa_restorer = 0}
        sigs = {__val = {32, 0 <repeats 31 times>}}
    #2  0x369a3e4c in __malloc_assert (assertion=<value optimized out>, file=0x36a5f560 "malloc.c", line=<value optimized out>, function=<value optimized out>) at malloc.c:352
    No locals.
    #3  0x369a41c0 in malloc_consolidate (av=0x34781de0) at malloc.c:5345
        fb = <value optimized out>
        maxfb = 0x36a79288
        p = 0x728818
        nextp = 0x6ddec8
        unsorted_bin = 0x36a7928c
        first_unsorted = <value optimized out>
        nextchunk = 0x728ac8
        size = 688
        nextsize = 880297072
        prevsize = <value optimized out>
        bck = <value optimized out>
        fwd = 0xbec
        __func__ = "malloc_consolidate"
    #4  0x369a70d8 in _int_malloc (av=0x36a7925c, bytes=<value optimized out>) at malloc.c:4573
        nb = <value optimized out>
        idx = 1673
        bin = <value optimized out>
        victim = 0x36a78000
        size = <value optimized out>
        victim_index = <value optimized out>
        remainder = <value optimized out>
        remainder_size = <value optimized out>
        block = <value optimized out>
        bit = <value optimized out>
        map = <value optimized out>
        fwd = <value optimized out>
        bck = <value optimized out>
        errstr = <value optimized out>
        __func__ = "_int_malloc"
    #5  0x369a83d4 in _do_malloc (bytes=525) at malloc.c:4011
            ar_ptr = 0x36a7925c
            victim = <value optimized out>
            __func__ = "_do_malloc"
    #6  0x369aa0e8 in *__GI___libc_malloc (bytes=525) at malloc.c:3648
            mem = <value optimized out>
    #7  0x350b1f4c in operator new(unsigned int) () from /lib/libstdc++.so.6
    No symbol table info available.
    #8  0x3508f0e8 in std::string::_Rep::_S_create(unsigned int, unsigned int, std::allocator<char> const&) () from /lib/libstdc++.so.6
    No symbol table info available.
    #9  0x3508fa4c in std::string::_Rep::_M_clone(std::allocator<char> const&, unsigned int) () from /lib/libstdc++.so.6
    No symbol table info available.
    #10 0x350905d0 in std::string::reserve(unsigned int) () from /lib/libstdc++.so.6
    No symbol table info available.
    #11 0x35089de4 in std::basic_stringbuf<char, std::char_traits<char>, std::allocator<char> >::overflow(int) () from /lib/libstdc++.so.6
    No symbol table info available.
    #12 0x3508e648 in std::basic_streambuf<char, std::char_traits<char> >::xsputn(char const*, int) () from /lib/libstdc++.so.6
    No symbol table info available.
    #13 0x35087604 in std::basic_ostream<char, std::char_traits<char> >& std::__ostream_insert<char, std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*, int) () from /lib/libstdc++.so.6
    No symbol table info available.
    #14 0x35087958 in std::basic_ostream<char, std::char_traits<char> >& std::operator<< <std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*) () from /lib/libstdc++.so.6
    No symbol table info available.
    #15 0x350e8974 in MyClass::operator<< <char [21]> (this=0x34782200, t=...) at ...