Bug 31647 - [gdb/testsuite, old dejagnu] ERROR: invalid command name "gdb_find_gnatmake"
Summary: [gdb/testsuite, old dejagnu] ERROR: invalid command name "gdb_find_gnatmake"
Status: RESOLVED FIXED
Alias: None
Product: gdb
Classification: Unclassified
Component: testsuite (show other bugs)
Version: HEAD
: P2 normal
Target Milestone: 15.1
Assignee: Not yet assigned to anyone
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2024-04-17 10:52 UTC by Tom de Vries
Modified: 2024-04-18 15:02 UTC (History)
0 users

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Description Tom de Vries 2024-04-17 10:52:34 UTC
On SLE-11, with a gdb-13.2-based package, I ran into:
...
Running /usr/src/packages/BUILD/gdb-13.2/gdb/testsuite/gdb.ada/mi_prot.exp ...
UNRESOLVED: gdb.ada/mi_prot.exp: testcase aborted due to invalid command name: gdb_find_gnatmake
ERROR: tcl error sourcing /usr/src/packages/BUILD/gdb-13.2/gdb/testsuite/gdb.ada/mi_prot.exp.
ERROR: invalid command name "gdb_find_gnatmake"
    while executing
"::gdb_tcl_unknown gdb_find_gnatmake"
    ("uplevel" body line 1)
    invoked from within
"uplevel 1 ::gdb_tcl_unknown $args"
    (procedure "::unknown" line 5)
    invoked from within
"gdb_find_gnatmake"
    (procedure "gnatmake_version_at_least" line 2)
    invoked from within
"gnatmake_version_at_least 8"
    invoked from within
"if { ![gnatmake_version_at_least 8] } {
    return -1
}"
...

The problem is that gdb_find_gnatmake is a backup for find_gnatmake:
...
if {[info procs find_gnatmake] == ""} {
    rename gdb_find_gnatmake find_gnatmake
    set use_gdb_compile(ada) 1
    gdb_note [join [list $note_prefix "Ada" $note_suffix] ""]
}
...
so gnatmake_version_at_least should use find_gnatmake instead.

We normally don't run into this because dejagnu is recent enough to include a find_gnatmake, so gdb_find_gnatmake is kept.

With SLE-11, an old dejagnu is used, find_gnatmake is not found so gdb_find_gnatmake is renamed to find_gnatmake, and we run into the error.

It's confusing that we're using the gdb_ prefix here, it seems something legitimate to use.

Maybe we should use future_ or gdb_future_ prefix instead to make this more clear.

Also, we could do:
...
 if {[info procs find_gnatmake] == ""} {
     rename gdb_find_gnatmake find_gnatmake
     set use_gdb_compile(ada) 1
     gdb_note [join [list $note_prefix "Ada" $note_suffix] ""]
 } else {
     rename gdb_find_gnatmake ""
 }
...
to prevent it being used by accident with a newer dejagnu.
Comment 2 Sourceware Commits 2024-04-18 15:01:56 UTC
The master branch has been updated by Tom de Vries <vries@sourceware.org>:

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=4c8fc167568d60a44f5a1f98bcb788a65af7a7ae

commit 4c8fc167568d60a44f5a1f98bcb788a65af7a7ae
Author: Tom de Vries <tdevries@suse.de>
Date:   Thu Apr 18 17:02:13 2024 +0200

    [gdb/testsuite] Use find_gnatmake instead of gdb_find_gnatmake
    
    On SLE-11, with an older dejagnu version, I ran into:
    ...
    Running gdb.ada/mi_prot.exp ...
    UNRESOLVED: gdb.ada/mi_prot.exp: \
      testcase aborted due to invalid command name: gdb_find_gnatmake
    ERROR: tcl error sourcing gdb.ada/mi_prot.exp.
    ERROR: invalid command name "gdb_find_gnatmake"
        while executing
    "::gdb_tcl_unknown gdb_find_gnatmake"
        ("uplevel" body line 1)
        invoked from within
    "uplevel 1 ::gdb_tcl_unknown $args"
        (procedure "::unknown" line 5)
        invoked from within
    "gdb_find_gnatmake"
        (procedure "gnatmake_version_at_least" line 2)
        invoked from within
    ...
    
    Proc gdb_find_gnatmake is actually a backup for find_gnatmake:
    ...
    if {[info procs find_gnatmake] == ""} {
        rename gdb_find_gnatmake find_gnatmake
    ...
    so gnatmake_version_at_least should use find_gnatmake instead.
    
    For a recent dejagnu with find_gnatmake, gdb_find_gnatmake is kept, and we
    don't run into this error.
    
    For an older dejagnu without find_gnatmake, gdb_find_gnatmake is renamed to
    find_gnatmake, and we do run into the error.
    
    It's confusing that we're using the gdb_ prefix for gdb_find_gnatmake, it
    seems something legitimate to use.  Maybe we should use future_ or gdb_future_
    prefix instead to make this more clear, but I've left that alone for now.
    
    Fix this by:
    - triggering the same error with a recent dejagnu by removing
      gdb_find_gnatmake unless used (and likewise for other procs in future.exp),
      and
    - using find_gnatmake in gnatmake_version_at_least.
    
    Tested on x86_64-linux.
    
    Approved-By: Tom Tromey <tom@tromey.com>
    
    PR testsuite/31647
    Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=31647
Comment 3 Tom de Vries 2024-04-18 15:02:36 UTC
Fixed.