I cross-compiled the app, that uses boost::asio library, and tested it on my target system. It works properly. But when I try to debug my app with gdb, I get this message in gdb-console:
Program received signal SIGSEGV, Segmentation fault.
_dl_debug_initialize (ldbase=4294967292, ns=1996288212) at dl-debug.c:55
55 if (r->r_map == NULL || ldbase != 0)
The result is the same for remote and native debugging, and for several other boost libraries (but not for all). After searching any information, that could be helpful, I found similar problem in this doc (p.63): http://support.garz-fricke.com/products/Santaro/Linux-Yocto/Releases/Yocto-jethro-5.1-r6859-0/GUF-Yocto-jethro-5.1-r6859-0-IMX6GUF-Manual.pdf As said in the document the problem can be caused by "Static instanciation in implicitly implemented C++ methods" and is connected to glibc. So I tried to reproduce this bug by this approach with code:
#include <iostream>
using namespace std;
class AClass
{
public:
void foo()
{
static int NmbOfInvokes = 0;
NmbOfInvokes++;
cout << NmbOfInvokes << endl;
}
};
int main(void)
{
cout << "Hello World" << endl;
AClass anInstance;
anInstance.foo();
anInstance.foo();
return 0;
}
This program works properly, but in debugging fails with the same SIGSEGV error.
To fix it enough to rewrite class AClass in this way:
class AClass
{
public:
void foo();
};
void AClass::foo()
{
static int NmbOfInvokes = 0;
NmbOfInvokes++;
cout << NmbOfInvokes << endl;
}
The compilation flags:
arm-poky-linux-gnueabi-g++ -march=armv7-a -mfloat-abi=hard -mfpu=neon -mtune=cortex-a7 --sysroot=/opt/fsl-imx-x11/4.1.15-1.2.0/sysroots/cortexa7hf-vfp-neon-poky-linux-gnueabi -DHAVE_CONFIG_H -I. -I.. --sysroot=/opt/fsl-imx-x11/4.1.15-1.2.0/sysroots/cortexa7hf-vfp-neon-poky-linux-gnueabi -g -O0 --sysroot=/opt/fsl-imx-x11/4.1.15-1.2.0/sysroots/cortexa7hf-vfp-neon-poky-linux-gnueabi -MT SegFault_Reproduce.o -MD -MP -MF .deps/SegFault_Reproduce.Tpo -c -o SegFault_Reproduce.o SegFault_Reproduce.cpp mv -f .deps/SegFault_Reproduce.Tpo .deps/SegFault_Reproduce.Po
../arm-poky-linux-gnueabi-libtool --tag=CXX --mode=link arm-poky-linux-gnueabi-g++ -march=armv7-a -mfloat-abi=hard -mfpu=neon -mtune=cortex-a7 --sysroot=/opt/fsl-imx-x11/4.1.15-1.2.0/sysroots/cortexa7hf-vfp-neon-poky-linux-gnueabi -g -O0 --sysroot=/opt/fsl-imx-x11/4.1.15-1.2.0/sysroots/cortexa7hf-vfp-neon-poky-linux-gnueabi --sysroot=/opt/fsl-imx-x11/4.1.15-1.2.0/sysroots/cortexa7hf-vfp-neon-poky-linux-gnueabi -o SegFault_Reproduce SegFault_Reproduce.o
arm-poky-linux-gnueabi-libtool: link: arm-poky-linux-gnueabi-g++ -march=armv7-a -mfloat-abi=hard -mfpu=neon -mtune=cortex-a7 --sysroot=/opt/fsl-imx-x11/4.1.15-1.2.0/sysroots/cortexa7hf-vfp-neon-poky-linux-gnueabi -g -O0 --sysroot=/opt/fsl-imx-x11/4.1.15-1.2.0/sysroots/cortexa7hf-vfp-neon-poky-linux-gnueabi --sysroot=/opt/fsl-imx-x11/4.1.15-1.2.0/sysroots/cortexa7hf-vfp-neon-poky-linux-gnueabi -o SegFault_Reproduce SegFault_Reproduce.o
I suppose that in some boost libraries are used similar static instanciation, because the symptoms are exactly the same.
What can I do to receive the possibility of debugging boost applications?
The versions of packages that I used: yocto 2.0.1, gcc 5.2.0, gdb 7.9.1, boost 1.58.
But when I try to debug my app with gdb, I get this message
This suggests a bug in GDB. Your version: 7.9.1 is almost 2 years old. Your first step should be to try a more recent GDB release.
One difference between "under GDB" and "native" execution is that GDB disables ASLR.
You can try (gdb) set disable-randomization off
before running the program. But given the symptoms you described, I doubt that has anything to do with the problem.