I compiled goldfish kernel with: I started the AVD with the compiled kernel. emulator -kernel goldfish/arch/arm/boot/zImage -avd TestAVD I pushed a compiled c program onto AVD. And I downloaded the libs (I’m not sure if it’s the proper way) run gdbserver: forward port: run gdb specify the search d…
Tag: gdb
How to print a binary value(1010) into decimal value(10) in GDB?
I want to print the decimal value of 1010 in gdb, but it prints the result as it is what I gave last. Answer GDB’s p[rint] command prints the value of the expression you provide, which is interpreted in the source language of the program being debugged. In C, your 1010 is a decimal literal, not a binary…
gdb catch syscall condition and string comparisson
I would like to catch a system call (more specifically access) and set a condition on it based on string comparison (obviously for arguments that are strings). Specific example: when debugging ls I would like to catch access syscalls for specific pathnames (the 1st argument) int access(const char *pathname, i…
How to predict a size of a process’ core file before generating it with GDB?
How can the size of the core file be predicted based on for example /proc/pid/maps, /proc/pid/coredump_filter, values shown by top like VIRT RES and so on? Generally speaking, on what does the size of the core file depend and what exactly does the file contain (which parts of virtual address space?)? I’…
GDB Missing separate debuginfos Fedora 22
I’m trying to debug a 32-bit ELF with GDB on Fedora 22, but I keep getting the following message: I did exacty that — I ran: I get that all dependencies are resolved and that there’s nothing to do. Namely, this message: But even then, when I try running the same file in gdb, I get the exact …
Linking binary compiled with “-g” with library without “-g”
Will there be any issues if a binary compiled with gdb symbols (-g) is linked with a library without gdb symbols? I am debugging this issue, and I am checking if the “-g” might be causing this. Answer Linking libraries compiled with debug symbols and without debug symbols should not cause Segmenta…
gdb core dump can not see any symbols after “sudo apt-get install libc6-dbg”
I am trying to debug a program in Ubuntu 12.04(x86_64) LTS with core dump file. At the beginning, the “bt” command is ok, just like below I want to see the symbol in libc.so.6 , so I install libc6-dbg using but after install I get all the thing wrong , showing in the below: I try to remvoe lib6c-d…
Debug information file conventions for Red Hat/Fedora?
According to lothar’s answer at How to generate gcc debug symbol outside the build target, I can create a two part executable – the stripped executable and the debug information file. After creating the stripped executable and the debug information file, I install the executable as normal (with ma…
gdb backtrace with no user input?
I’m wondering if it’s possible to launch an application via GDB, on a SegFault write the backtrace to a file (to look at later), and then exit GDB all without any user input. I’m running an application from a shell script in an infinite loop (so if it crashes it reloads) on OS boot from a no…
gdb step not working as expected
I am debugging static multi-threaded x86-64 C++ application on Linux. I can set breakpoints on functions and stop on them and I can walk step by step over function body. But when I try to step into another function, gdb not stops at it’s beginning and it seems that it just continues execution. When I in…