[Issue 23654] execv_: toAStringz: memory corruption

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=23654

--- Comment #12 from kdevel <kdevel at vogtner.de> ---
(In reply to kdevel from comment #5)
> Created attachment 1868 [details]
> Patch (v0) against process.d
> 
> Could not yet test this code. That is how I would implement those D wrappers.

The test is rather simple.

1. Locate process.d (locate src/phobos/std/process.d) and copy it
   to the current working directory.

2. Download, compile, execute execv-recur.d (4th attachment)

   $ dmd execv-recur.d process.d
   $ ./execv-recur 1
   [...]
   self <./execv-recur> newargs [0, 1] <./execv-recur> <131072>
   dump:  <2> <4> <2> <32> <2> <4> <2>
   object.Exception at execv-recur.d(49): exp <4> actual <131072>
   [...]

3. Download the Patch (3rd attachment) apply, recompile, execute:

   $ patch -i issue-23654.v0.patch 
   patching file process.d
   Hunk #1 succeeded at 4309 (offset 50 lines).
   Hunk #2 succeeded at 4374 (offset 50 lines).
   $ dmd execv-recur.d process.d
   $ ./execv-recur 1
   [...]
   self <./execv-recur> newargs [0, 1] <./execv-recur> <262144>
   rc = <-1> errno = <7> strerror = <Argument list too long>

This is the expected outcome.

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