[PATCH resend] winedbg: Try to load debug symbols for executable in gdb mode.

[Bernhard Übelacker]

Signed-off-by: Bernhard Übelacker <bernhardu(a)mailbox.org>
----
This loads the debug information similar to
LOAD_DLL_DEBUG_EVENT for dll's a few lines below, or
CREATE_PROCESS_DEBUG_EVENT for exe's in winedbg/tgt_active.c.

It should be an improvement just for real PE executables.

For .exe.so files the debug information gets loaded via the ELF
enumeration, with this patch 'info share' shows a line for
the fake exe additional to the .exe.so line.

First submission:
https://www.winehq.org/pipermail/wine-devel/2021-May/186536.html
---
 programs/winedbg/gdbproxy.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/programs/winedbg/gdbproxy.c b/programs/winedbg/gdbproxy.c
index 478e0d16fe0..d768a8a585c 100644
--- a/programs/winedbg/gdbproxy.c
+++ b/programs/winedbg/gdbproxy.c
@@ -437,6 +437,17 @@ static BOOL handle_debug_event(struct gdb_context* gdbctx)
         fprintf(stderr, "%04x:%04x: create thread I @%p\n", de->dwProcessId,
             de->dwThreadId, de->u.CreateProcessInfo.lpStartAddress);
 
+        fetch_module_name( de->u.CreateProcessInfo.lpImageName, de->u.CreateProcessInfo.lpBaseOfImage,
+                           u.buffer, ARRAY_SIZE(u.buffer) );
+        fprintf(stderr, "%04x:%04x: loads EXE %s @%p (%u<%u>)\n",
+                de->dwProcessId, de->dwThreadId,
+                dbg_W2A(u.buffer, -1),
+                de->u.CreateProcessInfo.lpBaseOfImage,
+                de->u.CreateProcessInfo.dwDebugInfoFileOffset,
+                de->u.CreateProcessInfo.nDebugInfoSize);
+        dbg_load_module(gdbctx->process->handle, de->u.CreateProcessInfo.hFile, u.buffer,
+                        (DWORD_PTR)de->u.CreateProcessInfo.lpBaseOfImage, 0);
+
         dbg_add_thread(gdbctx->process, de->dwThreadId,
                        de->u.CreateProcessInfo.hThread,
                        de->u.CreateProcessInfo.lpThreadLocalBase);
-- 
2.30.2

[Alexandre Julliard]

Bernhard Übelacker <bernhardu(a)mailbox.org> writes:
> diff --git a/programs/winedbg/gdbproxy.c b/programs/winedbg/gdbproxy.c
> index 478e0d16fe0..d768a8a585c 100644
> --- a/programs/winedbg/gdbproxy.c
> +++ b/programs/winedbg/gdbproxy.c
> @@ -437,6 +437,17 @@ static BOOL handle_debug_event(struct gdb_context* gdbctx)
>          fprintf(stderr, "%04x:%04x: create thread I @%p\n", de->dwProcessId,
>              de->dwThreadId, de->u.CreateProcessInfo.lpStartAddress);
>
> +        fetch_module_name( de->u.CreateProcessInfo.lpImageName, de->u.CreateProcessInfo.lpBaseOfImage,
> +                           u.buffer, ARRAY_SIZE(u.buffer) );
> +        fprintf(stderr, "%04x:%04x: loads EXE %s @%p (%u<%u>)\n",
> +                de->dwProcessId, de->dwThreadId,
> +                dbg_W2A(u.buffer, -1),
> +                de->u.CreateProcessInfo.lpBaseOfImage,
> +                de->u.CreateProcessInfo.dwDebugInfoFileOffset,
> +                de->u.CreateProcessInfo.nDebugInfoSize);

None of that should be necessary, it looks like you are copying some old
code.

-- 
Alexandre Julliard
julliard(a)winehq.org

[Bernhard Übelacker]

Am 25.06.21 um 16:26 schrieb Alexandre Julliard:
> Bernhard Übelacker <bernhardu(a)mailbox.org> writes:
> > diff --git a/programs/winedbg/gdbproxy.c b/programs/winedbg/gdbproxy.c
> > index 478e0d16fe0..d768a8a585c 100644
> > --- a/programs/winedbg/gdbproxy.c
> > +++ b/programs/winedbg/gdbproxy.c
> > @@ -437,6 +437,17 @@ static BOOL handle_debug_event(struct gdb_context* gdbctx)
> >           fprintf(stderr, "%04x:%04x: create thread I @%p\n", de->dwProcessId,
> >               de->dwThreadId, de->u.CreateProcessInfo.lpStartAddress);
> >
> > +        fetch_module_name( de->u.CreateProcessInfo.lpImageName, de->u.CreateProcessInfo.lpBaseOfImage,
> > +                           u.buffer, ARRAY_SIZE(u.buffer) );
> > +        fprintf(stderr, "%04x:%04x: loads EXE %s @%p (%u<%u>)\n",
> > +                de->dwProcessId, de->dwThreadId,
> > +                dbg_W2A(u.buffer, -1),
> > +                de->u.CreateProcessInfo.lpBaseOfImage,
> > +                de->u.CreateProcessInfo.dwDebugInfoFileOffset,
> > +                de->u.CreateProcessInfo.nDebugInfoSize);
>
> None of that should be necessary, it looks like you are copying some old
> code.

I copied this from the LOAD_DLL_DEBUG_EVENT a few lines below.

But yes, the fetch_module_name for the CREATE_PROCESS_DEBUG_EVENT is
not necessary, the lpBaseOfImage is already filled.

The "loads EXE" is also just a copy of the "loads DLL" line
printed for each dll.

I will send a new version with both removed. Thanks for the review.

Kind regards,
Bernhard