SEGV happened in asan_allocate

[xian li]

Hi,

I am using asan to detect our app's memory problems, but when run our app with asan,

the SEGV happened,  the backtrace is like the following
-----------------------------------------------------

(gdb) bt

#0  0x0000007fb72ce304 in __asan::Allocate (size=<optimized out>, 

    size@entry=67, alignment=<optimized out>, alignment@entry=0, 

    stack=stack@entry=0x7fab1fd650, 

    alloc_type=alloc_type@entry=__asan::FROM_NEW, 

    can_fill=can_fill@entry=true)

    at /home/user/Downloads/cross_compile_gcc/gcc-linara-5.4.0/libsanitizer/asan/asan_allocator2.cc:332

#1  0x0000007fb72ceecc in __asan::asan_memalign (alignment=alignment@entry=0, 

    size=size@entry=67, stack=stack@entry=0x7fab1fd650, 

    alloc_type=alloc_type@entry=__asan::FROM_NEW)

    at /home/user/Downloads/cross_compile_gcc/gcc-linara-5.4.0/libsanitizer/asan/asan_allocator2.cc:581

#2  0x0000007fb733f0e4 in operator new (size=67)

    at /home/user/Downloads/cross_compile_gcc/gcc-linara-5.4.0/libsanitizer/asan/asan_new_delete.cc:60

#3  0x0000007fb72379b4 in std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_mutate(unsigned long, unsigned long, char const*, unsigned long) () from /usr/lib64/libstdc++.so.6

#4  0x0000007fb7238e68 in std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_append(char const*, unsigned long) ()

   from /usr/lib64/libstdc++.so.6

#5  0x00000000004a02bc in std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::append (__str=..., this=<optimized out>)

---Type <return> to continue, or q <return> to quit---

    at ../../../../platform/linux/agl_common/include/c++/5.3.0/bits/basic_string.h:984

#6  std::operator+<char, std::char_traits<char>, std::allocator<char> > (

    __rhs=..., __lhs=...)

    at ../../../../platform/linux/agl_common/include/c++/5.3.0/bits/basic_string.h:4789

#7  ZmDvrTitle::getImg (this=this@entry=0x7fae713990, prop=..., bmpName=...)

    at ../../../../projects/product/node/dvr/zm_dvr_title.cpp:119

---------------------------------------------------------------

Any ideas about it? is it the problem of our app or problem of asan?

how can I know them？ thanks in advance

[xian li]

maybe it is because of the way I compile my app using -lasan directly
during link process, after modification, there is no such errors any
more

xian li <lixian2...@gmail.com> 于2021年2月5日周五 下午4:54写道：

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