[Bug python/27234] New: gdb.Value causes abort when converted to string

[Bug python/27234] New: gdb.Value causes abort when converted to string

[grazfather at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=27234

            Bug ID: 27234
           Summary: gdb.Value causes abort when converted to string
           Product: gdb
           Version: 10.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: python
          Assignee: unassigned at sourceware dot org
          Reporter: grazfather at gmail dot com
  Target Milestone: ---

This was reported via github: https://github.com/hugsy/gef/issues/593, but it's
a bug in GDB.

Compile the following go code:

```
package main

import (
       "fmt"
)

func main() {
       fmt.Printf("hi");
}
```

for x86_64.

Open it in GDB 10.1

b main.main
run
ni 7

Now run in a python interpreter
```
current_frame = gdb.selected_frame()
frame_args = gdb.FrameDecorator.FrameDecorator(current_frame).frame_args() or
[]
values = [x.sym.value(current_frame) for x in frame_args]
# You should get a list of four values
# value 1 can be converted to a string
str(values[1])
# This will abort
str(values[0])
```

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[Bug python/27234] gdb.Value causes abort when converted to string

[grazfather at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=27234

--- Comment #1 from grazfather at gmail dot com ---
GNU gdb (Ubuntu 10.1-1.6ubuntu1) 10.1.90.20210103-git

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[Bug python/27234] gdb.Value causes abort when converted to string

[tromey at sourceware dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=27234

Tom Tromey <tromey at sourceware dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |tromey at sourceware dot org

--- Comment #2 from Tom Tromey <tromey at sourceware dot org> ---
I tried this and it worked for me.
However I don't know Go.
How exactly did you compile it?

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[Bug python/27234] gdb.Value causes abort when converted to string

[grazfather at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=27234

--- Comment #3 from grazfather at gmail dot com ---
Simply with `go build x.go`

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[Bug python/27234] gdb.Value causes abort when converted to string

[tromey at sourceware dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=27234

Tom Tromey <tromey at sourceware dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |WAITING
   Last reconfirmed|                            |2023-04-17

--- Comment #4 from Tom Tromey <tromey at sourceware dot org> ---
With Fedora 36 gdb (12.1) I don't see a crash.
Could you try a newer gdb?  I wonder if it's been fixed.

Also, FTR, I had to use the golang go (not gcc.go) to
even get these values.

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[Bug python/27234] gdb.Value causes abort when converted to string

[grazfather at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=27234

--- Comment #5 from grazfather at gmail dot com ---
I can still reproduce this on GDB 12.1 from ubuntu 22.04.2 installed via
apt-get.

Will work to reproduce on 16.2

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