My application opens a connection with the following line:
int fd(v4l2_open(f_device_path.c_str(), O_RDWR));
A little later, I get a crash from the sanitizer that looks like this:
=================================================================
==14548==ERROR: AddressSanitizer: alloc-dealloc-mismatch (malloc vs operator delete) on 0x007f8830ea10
#0 0x7f931bf987 in operator delete(void*, unsigned long) (/usr/lib/aarch64-linux-gnu/libasan.so.4+0xd3987)
#1 0x7f90810437 in __cxa_finalize (/lib/aarch64-linux-gnu/libc.so.6+0x35437)
0x007f8830ea10 is located 0 bytes inside of 40-byte region [0x007f8830ea10,0x007f8830ea38)
allocated by thread T0 here:
#0 0x7f931bbb1b in malloc (/usr/lib/aarch64-linux-gnu/libasan.so.4+0xcfb1b)
#1 0x7f86e6e833 in fnet::String::String(char const*) (/usr/lib/aarch64-linux-gnu/tegra/libnvfnet.so+0x7833)
#2 0x7f93fafb37 (/lib/ld-linux-aarch64.so.1+0xdb37)
#3 0x7f93fb3cd7 (/lib/ld-linux-aarch64.so.1+0x11cd7)
#4 0x7f908e6693 in _dl_catch_exception (/lib/aarch64-linux-gnu/libc.so.6+0x10b693)
#5 0x7f93fb3417 (/lib/ld-linux-aarch64.so.1+0x11417)
#6 0x7f907c7013 (/lib/aarch64-linux-gnu/libdl.so.2+0x1013)
#7 0x7f908e6693 in _dl_catch_exception (/lib/aarch64-linux-gnu/libc.so.6+0x10b693)
#8 0x7f908e6737 in _dl_catch_error (/lib/aarch64-linux-gnu/libc.so.6+0x10b737)
#9 0x7f907c877f (/lib/aarch64-linux-gnu/libdl.so.2+0x277f)
#10 0x7f907c70e7 in dlopen (/lib/aarch64-linux-gnu/libdl.so.2+0x10e7)
#11 0x7f93138e83 (/usr/lib/aarch64-linux-gnu/libasan.so.4+0x4ce83)
#12 0x7f916e8a67 (/usr/lib/aarch64-linux-gnu/tegra/libv4l2.so.0+0x7a67)
#13 0x5588bce737 in video_connection::video_connection(std::shared_ptr<panel_context>, bool, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) /home/alexis/ve/virtual-entertainment/panel-ve/src/video_connection.cpp:111
...snip...
Would your fnet::String::~String() function use delete buffer instead of free(buffer);? (or maybe the constructor should use a new char[size] instead of malloc(), especially if you’re using a unique_ptr<> or auto_ptr<>).
I can still run my code, but that’s definitely something you want to fix in your next release.
Specifically, I use the following command line option to compile with the sanitizer:
g++ ... -fsanitize=address -fsanitize=enum -fsanitize=unreachable ...