How do I run a program with commandline arguments using GDB within a Bash script

Question

When running a program on GDB  usually  the arguments for the program are given at the run command  Is there a way to run the program using GDB and as well as give arguments within a shell script   I saw an answer in a related question  mentioning that we can attach GDB to the program after the script starts executing  But then I will have to  wait  the program   Is there another way to do this

User · Answer

Much too late  but here is a method that works during gdb session      gdb  lt executable gt    then      gdb  apropos argument   This will return lots of matches  the useful one is set args   set args -- Set argument list to give program being debugged when it is started       set args arg1 arg2       then     r   This will run the program  passing to main argc  argv  the arguments and the argument count

User · Answer

Another way to do this  which I personally find slightly more convenient and intuitive  without having to remember the --args parameter   is to compile normally  and use r arg1 arg2 arg3 directly from within gdb  like so     gcc -g   c   h   gdb   a out  gdb  r arg1 arg2 arg3

User · Answer

gdb -ex r --args myprogram arg1 arg2   -ex r is short for -ex run and tells gdb to run your program immediately  rather than wait for you to type  run  at the prompt  Then --args says that everything that follows is the command and arguments  just as you d normally type them at the commandline prompt

User · Answer

In addition to the answer of Hugo Ideler  When using arguments having themself prefix like -- or -  I was not sure to conflict with gdb one   It seems gdb takes all after args option as arguments for the program   At first I wanted to be sure  I ran gdb with quotes around your args  it is removed at launch   This works too  but optional   gdb --args executablename  --arg1   --arg2   --arg3    This doesn t work    gdb --args executablename  --arg1   --arg2   --arg3  -tui   In that case  -tui is used as my program parameter not as gdb one

User · Answer

You can run gdb with --args parameter   gdb --args executablename arg1 arg2 arg3   If you want it to run automatically  place some commands in a file  e g   run   and give it as argument  -x  tmp cmds  Optionally you can run with -batch mode   gdb -batch -x  tmp cmds --args executablename arg1 arg2 arg3

User · Answer

If the --args parameter is not working on your machine  i e  on Solaris 8   you may start gdb like  gdb -ex  set args  lt arg 1 gt   lt arg 2 gt       lt arg n gt     And you can combine this with inputting a file to stdin and  running immediatelly    gdb -ex  set args  lt arg 1 gt   lt arg 2 gt       lt arg n gt   lt   lt input file gt   -ex  r

User · Answer

You could create a file with context   run arg1 arg2 arg3 etc  program input   And call gdb like  gdb prog  lt  file

User · Answer

gdb has --init-command  lt somefile gt  where somefile has a list of gdb commands to run  I use this to have   GDB comments in my code  then    echo  file   a out   gt  run grep -nrIH    GDB       sed  s                         1 g        awk   print  b       1        grep -v   echo  0 sed  s       g    gt  gt  run gdb --init-command   run -ex r   as a script  which puts the command to load the debug symbols  and then generates a list of break commands to put a break point for each   GDB comment  and starts it running

[gdb] How do I run a program with commandline arguments using GDB within a Bash script?

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