What is GDB?

GDB, the GNU Project debugger, allows you to see what is going on `inside' another program while it executes -- or what another program was doing at the moment it crashed.

GDB can do four main kinds of things (plus other things in support of these) to help you catch bugs in the act:

• Start your program, specifying anything that might affect its behavior.
• Make your program stop on specified conditions.
• Examine what has happened, when your program has stopped.
• Change things in your program, so you can experiment with correcting the effects of one bug and go on to learn about another.

What Languages does GDB Support?

• Ada
• Assembly
• C
• C++
• D
• Fortran
• Go
• Objective-C
• OpenCL
• Modula-2
• Pascal
• Rust

GDB version 10.1

An errata list (PROBLEMS) and documentation are also available.

News

October 24th, 2020: GDB 10.1 Released!

The latest version of GDB, version 10.1, is available for download.

This version of GDB includes the following changes and enhancements:

• Support for debugging new targets:
  • BPF (bpf-unknown-none)
• GDBserver support for the following targets:
  • ARC GNU/Linux
  • RISC-V GNU/Linux
• Multi-target debugging support (experimental)
• Support for debuginfod, an HTTP server for distributing ELF/DWARF debugging information as well as source code.
• Support for debugging a 32-bit Windows program using a 64-bit Windows GDB.
• Support for building GDB with GNU Guile 3.0 and 2.2 (in addition to 2.0)
• Improved performance during startup through the use of threading during symbol table loading (an optional feature in GDB 9, now enabled by default in GDB 10).
• Various enhancements to the Python and Guile APIs
• Various TUI Mode fixes and enhancements.
• Other miscellaneous enhancements:
  • Detection when attaching to a process of a mismatch between this process and the executable previously loaded into GDB.
  • Support for default arguments for "alias" commands.
• GDBserver support for the following host triplets has been removed:
  • i[34567]86-*-lynxos*
  • powerpc-*-lynxos*
  • i[34567]86-*-nto*
  • bfin-*-*linux*
  • crisv32-*-linux*
  • cris-*-linux*
  • m32r*-*-linux*
  • tilegx-*-linux*
  • arm*-*-mingw32ce*
  • i[34567]86-*-mingw32ce*

See the NEWS file for a more complete and detailed list of what this release includes.

September 13th, 2020: GDB 10 branch created

The GDB 10 branch (gdb-10-branch) has been created. To check out a copy of the branch use:

git clone --branch gdb-10-branch git://sourceware.org/git/binutils-gdb.git

May 23rd, 2020: GDB 9.2 Released!

The latest version of GDB, version 9.2, is available for download.

This is a minor corrective release over GDB 9.1, fixing the following issues:

• PR tui/25586 (Resizing the source/disassembly or command window produces corrupted display)
• PR gdb/25650 (GDB can't 'printf' a convenience variable holding an inferior address)
• PR build/25981 (Use of short i386 register names breaks compilation on recent Solaris 11.4)
• PR symtab/26003 (infinite loop loading symbols from separate debug objfile)
• PR build/26029 (GDB build failure on SPARC)

Nov 28, 2006: Reversible Debugging

The GDB maintainers are looking for contributors interested in reversible debugging.