Exciting Features in Recent GDB Versions
Some good stuff in more recent GDB versions
-
debuginfod
-
user-defined commands
-
better backtraces
-
TUI + Python awesomeness
-
compile command
-
condition breakpoint fix
text (i.e. code)
ELF, DWARF, processes and debuggers
gcc -g3 hello.c
symbol table
debug info
rodata (e.g. strings)
data (e.g. non-zero globals)
=>
a.out
process
GDB
Source code
Separating debuginfo
Either:
cp a.out a.out.dbg && strip a.out
Or:
objcopy --only-keep-debug a.out a.out.dbg
objcopy --add-gnu-debug-link=a.out.dbg a.out
Or:
gcc -gsplit-dwarf -g3 hello.c
debuginfod
debuginfod serves debug information over HTTP
(a bit like Microsoft Symbol Server)
sudo apt install debuginfod
debuginfod
DEBUGINFOD_URLS=localhost:8002 gdb a.out
debuginfod servers
https://debuginfod.elfutils.org/
Federated to Debian, OpenSUSE, CentOS debuginfod servers.
Client support in GDB, Valgrind, SystemTap
Better user-defined commands
define-prefix abc xyz
Names can now use ‘.’ character
The
with
command
| CMD | shell
set may-call-functions on|off
&
eval
now will not call in the inferior for string args.
Better backtraces
set print frame-arguments
all | none | presence | scalars
set print frame-info
auto | location | location-and-address | short-location |
source-and-location | source-line
Output styling
set style enabled on|off
ptype /xo
New convenience variables
$_gdb_major $_gdb_minor
$_gdb_setting $_gdb_setting_str
$_shell_exitcode $_shell_exitsignal
Symbol worker threads
maintenance show worker-threads
Optional in v9, on by default in v10 and v11
Python TUI
compile
command
Conditional breakpoint fix
Discover the latest advancements in GDB versions, including debuginfod, user-defined commands, improved backtraces, TUI enhancements, Python integration, streamlined compilation processes, ELF/DWARF insights, debuginfo separation techniques, and more. Unleash the power of debuginfod servers, federated support, better command customization, advanced backtrace options, output styling controls, new convenience variables, and symbol worker thread management.
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Presentation Transcript
Some good stuff in more recent GDB versions - - - - - - debuginfod user-defined commands better backtraces TUI + Python awesomeness compile command condition breakpoint fix
ELF, DWARF, processes and debuggers => a.out gcc -g3 hello.c process text (i.e. code) GDB data (e.g. non-zero globals) rodata (e.g. strings) symbol table debug info Source code
Separating debuginfo Either: cp a.out a.out.dbg && strip a.out Or: objcopy --only-keep-debug a.out a.out.dbg objcopy --add-gnu-debug-link=a.out.dbg a.out Or: gcc -gsplit-dwarf -g3 hello.c
debuginfod debuginfod serves debug information over HTTP (a bit like Microsoft Symbol Server) sudo apt install debuginfod debuginfod DEBUGINFOD_URLS=localhost:8002 gdb a.out
debuginfod servers https://debuginfod.elfutils.org/ Federated to Debian, OpenSUSE, CentOS debuginfod servers. Client support in GDB, Valgrind, SystemTap
Better user-defined commands define-prefix abc xyz Names can now use . character The with command | CMD | shell set may-call-functions on|off print & eval now will not call in the inferior for string args.
Better backtraces set print frame-arguments all | none | presence | scalars set print frame-info auto | location | location-and-address | short-location | source-and-location | source-line
Output styling set style enabled on|off
New convenience variables $_gdb_major $_gdb_minor $_gdb_setting $_gdb_setting_str $_shell_exitcode $_shell_exitsignal
Symbol worker threads maintenance show worker-threads Optional in v9, on by default in v10 and v11
