Re: [PATCH 2/4] gdb.base/callfuncs.exp: Adjust for Windows

[Andrew Burgess <aburgess@redhat.com>]

Pedro Alves <pedro@palves.net> writes:

> A bit of self-review...
>
> I did the same mistake I did recently, again.  Here:
>
>> -if { ![prepare_for_testing "failed to prepare" $testfile $srcfile "$compile_flags additional_flags=-DPROTOTYPES"] } {
>> +if { ![prepare_for_testing "failed to prepare" $testfile-1 $srcfile "$compile_flags additional_flags=-DPROTOTYPES"] } {
>>      perform_all_tests 1
>>  }
>>  
>>  with_test_prefix "noproto" {
>> -    if { ![prepare_for_testing "failed to prepare" $testfile $srcfile \
>> +    if { ![prepare_for_testing "failed to prepare" $testfile-0 $srcfile \
>>  	       "$compile_flags additional_flags=-DNO_PROTOTYPES"] } {
>>  	perform_all_tests 0
>>      }
>
> Since rerun_and_prepare now always restart GDB, these prepare_for_testing calls
> can be turned into build_executable calls.
>
> I've done that now.  The testcase still passes cleanly.
>
> From 974b26155dd4a128a0382b3b0b08d60d78f0a0de Mon Sep 17 00:00:00 2001
> From: Pedro Alves <pedro@palves.net>
> Date: Tue, 14 Jul 2026 19:48:30 +0100
> Subject: [PATCH] gdb.base/callfuncs.exp: Adjust for Windows
>
> On Windows, gdb.base/callfuncs.exp currently ends up skipping the
> "noproto" tests, like:
>
>  UNTESTED: gdb.base/callfuncs.exp: noproto: failed to prepare
>
> This is because the testcase tries to overwrite the executable while
> GDB has the executable still open, which doesn't work on Windows:
>
>  Executing on host: x86_64-w64-mingw32-gcc ... -o .../gdb.base/callfuncs/callfuncs
>  .../x86_64-w64-mingw32/bin/ld.exe: cannot open output file .../gdb.base/callfuncs/callfuncs.exe: Permission denied
>
> Fix this with two changes:
>
>  - Compile the prototyped and non-prototyped executables to two
>    separate executables.  This is just what we normally do, so that
>    it's convenient to test manually against either of the executables.
>
>  - Restart GDB instead of just re-running to main.
>
> Strictly speaking, either of the changes alone would fix it, but I
> think both are useful to do.

Is this true?  After the first perform_all_tests call GDB is still
running and has the executable file open.  Without the separate
filenames the second build_executable call will try to change the
executable that GDB holds open.

All you've done is split prepare_for_testing into build_executable and
clean_restart, but the order hasn't changed (and you call clean_restart
more often now).

Not that I object to these changes, I just disagree with the last
sentence as I don't think the clean_restart change alone will fix the
problem.

Reviewed-By: Andrew Burgess <aburgess@redhat.com>

Thanks,
Andrew



>
> Change-Id: I496e0da65f9d484079c5d9a1222104bec39ee98b
> ---
>  gdb/testsuite/gdb.base/callfuncs.exp | 26 ++++++++++++++------------
>  1 file changed, 14 insertions(+), 12 deletions(-)
>
> diff --git a/gdb/testsuite/gdb.base/callfuncs.exp b/gdb/testsuite/gdb.base/callfuncs.exp
> index f2870c577f2..0ac1c603351 100644
> --- a/gdb/testsuite/gdb.base/callfuncs.exp
> +++ b/gdb/testsuite/gdb.base/callfuncs.exp
> @@ -334,12 +334,18 @@ proc fetch_all_registers {test} {
>  # Global used by RERUN_AND_PREPARE to make test names unique.
>  set rerun_count 0
>  
> -proc rerun_and_prepare {} {
> +proc rerun_and_prepare {prototypes} {
>      global rerun_count
>  
> +    clean_restart $::testfile-$prototypes
> +
>      incr rerun_count
>      with_test_prefix "rerun number ${rerun_count}" {
>  
> +	gdb_test_no_output "set print sevenbit-strings"
> +	gdb_test_no_output "set print address off"
> +	gdb_test_no_output "set width 0"
> +
>  	if { ![runto_main] } {
>  	    return
>  	}
> @@ -359,11 +365,7 @@ proc rerun_and_prepare {} {
>  }
>  
>  proc perform_all_tests {prototypes} {
> -    gdb_test_no_output "set print sevenbit-strings"
> -    gdb_test_no_output "set print address off"
> -    gdb_test_no_output "set width 0"
> -
> -    rerun_and_prepare
> +    rerun_and_prepare $prototypes
>  
>      # Save all register contents.
>      set old_reg_content \
> @@ -382,7 +384,7 @@ proc perform_all_tests {prototypes} {
>  	fail "gdb function calls preserve register contents"
>      }
>  
> -    rerun_and_prepare
> +    rerun_and_prepare $prototypes
>      # Save all register contents.
>      set old_reg_content \
>  	[fetch_all_registers "retrieve original register contents 2"]
> @@ -408,7 +410,7 @@ proc perform_all_tests {prototypes} {
>  		 }
>  	     }
>  
> -    rerun_and_prepare
> +    rerun_and_prepare $prototypes
>      # Set breakpoint at a function we will call from gdb.
>      gdb_breakpoint add
>      # Save all register contents.
> @@ -434,7 +436,7 @@ proc perform_all_tests {prototypes} {
>  		 }
>  	     }
>  
> -    rerun_and_prepare
> +    rerun_and_prepare $prototypes
>      # Set breakpoint at a function we will call from gdb.
>      gdb_breakpoint add
>      # Save all register contents.
> @@ -459,7 +461,7 @@ proc perform_all_tests {prototypes} {
>  		 }
>  	     }
>  
> -    rerun_and_prepare
> +    rerun_and_prepare $prototypes
>      # Set breakpoint at a function we will call from gdb.
>      gdb_breakpoint add
>      set old_reg_content \
> @@ -547,12 +549,12 @@ proc perform_all_tests {prototypes} {
>  
>  # Perform all tests with and without function prototypes.
>  
> -if { ![prepare_for_testing "failed to prepare" $testfile $srcfile "$compile_flags additional_flags=-DPROTOTYPES"] } {
> +if { ![build_executable "failed to build" $testfile-1 $srcfile "$compile_flags additional_flags=-DPROTOTYPES"] } {
>      perform_all_tests 1
>  }
>  
>  with_test_prefix "noproto" {
> -    if { ![prepare_for_testing "failed to prepare" $testfile $srcfile \
> +    if { ![build_executable "failed to build" $testfile-0 $srcfile \
>  	       "$compile_flags additional_flags=-DNO_PROTOTYPES"] } {
>  	perform_all_tests 0
>      }
>
> base-commit: 490469846dcef89fe53668bdbba73591c64bed61
> prerequisite-patch-id: f9480ec6b27aac188161579fdec6f08d5065ac6f
> -- 
> 2.54.0