Trouble with the PL/pgSQL debugger and VC++ - Mailing list pgsql-hackers

Hi Korry,

I am having problems with getting the debugger to work.  Setup:

OS: Windows XP
Postgresql Version: 8.2.4 compiled with VC++ 2005

Since my version of pg is built with VC++ I thought it wise to also use 
VC++ for the debugger plugin.  So I converted the Makefile into 3 
different VC++ projects - pldbgapi, plugin_debugger and targetinfo. 
Note that targetinfo is not mentioned at all in the comments at the top 
of Makefile - you may wish to update them.

VC++ did not compile the code as is, I've attached a patch below with 
the changes I had to make.  I also generated the appropriate DEF files 
(using the perl scripts in postgresql-8.2.4\src\tools\msvc).  I also had 
to define a preprocess define, __WIN32__ (line 1524, pldgbapi.c).  Maybe 
you could use something more standard, like _WIN32?

I was then able to build the dlls except the profiler (for some reason 
the struct timezone wasn't being picked up via the includes - but I left 
that for another day).

I then installed the dlls as per the instructions and updated my 
postgresql.conf file.

However, I can't set any breakpoints using PgAdmin.  I know the dlls are 
loaded via Process Explorer, and in fact I can attach to them with the 
VC++ debugger.

So then I tried running through your command line example (using the 
PgAdmin sql window and then psql) and here are the results:



1. CREATE OR REPLACE FUNCTION testwhere(x int)
RETURNS int AS
$$
DECLARE  result int;
BEGIN  result := x + 1;  RETURN x;
END;
$$
LANGUAGE 'plpgsql' STABLE;


2.  SELECT * FROM pldbg_get_target_info( 'testwhere', 'f' );

target;schema;nargs;argtypes;targetname;argmodes;argnames;targetlang;fqname;returnsset;returntype
80655;79041;1;23;testwhere;;{x};77823;core.testwhere;f;23

3.  SELECT * FROM pldbg_create_listener();

pldbg_create_listener
1

4.  SELECT * from pldbg_set_global_breakpoint(1, 80655, NULL, NULL);
 pldbg_set_global_breakpoint t

5. SELECT * FROM pldbg_wait_for_target(1);

At this point the session hangs, as explained in your email.  So what 
happens next?  I tried:

*  Opening a new pgadmin window and doing step 6 (SELECT * FROM 
pldbg_wait_for_breakpoint(1);).  That didn't work.

* I tried executing the function (select testwhere(7);).  That didn't work.

Any tips/help appreciated.  Like I said, I can step through the code in 
the VC++ debugger so I can pretty much look at anything that might be 
helpful.

And I'd be happy to send along the VC++ project files and DEF files if 
you'd like them.

Thanks,

Charlie

--------------------


Only in .: msvc
diff -u /c/temp/contrib/pldebugger/pldbgapi.c ./pldbgapi.c
--- /c/temp/contrib/pldebugger/pldbgapi.c    2007-07-29 17:09:46 -0600
+++ ./pldbgapi.c    2007-09-06 00:34:29 -0600
@@ -1560,6 +1560,12 @@ } static int allocateServerListener( int * port ) {
+#ifdef WIN32
+    WORD         wVersionRequested;
+    WSADATA     wsaData;
+    int         err;
+    u_long blockingMode = 0;
+#endif     int                             sockfd           = socket( AF_INET, SOCK_STREAM, 0 );     struct
sockaddr_in            proxy_addr         = {0};     socklen_t                    proxy_addr_len     = sizeof(
proxy_addr);
 
@@ -1571,9 +1577,6 @@     proxy_addr.sin_addr.s_addr = htonl( INADDR_ANY );          #ifdef WIN32
-    WORD         wVersionRequested;
-    WSADATA     wsaData;
-    int         err;
     wVersionRequested = MAKEWORD( 2, 2 );

@@ -1617,7 +1620,6 @@     listen( sockfd, 2 );      #ifdef WIN32
-    u_long blockingMode = 0;
     ioctlsocket( sockfd, FIONBIO,  &blockingMode ); #endif
Only in .: pldebugger
diff -u /c/temp/contrib/pldebugger/plugin_debugger.c ./plugin_debugger.c
--- /c/temp/contrib/pldebugger/plugin_debugger.c    2007-08-07 10:37:14 -0600
+++ ./plugin_debugger.c    2007-09-06 00:34:58 -0600
@@ -1143,16 +1143,18 @@     int                     client_sock;     int                    reuse_addr_flag = 1;

+#ifdef WIN32
+    WORD wVersionRequested;
+    WSADATA wsaData;
+    int err;
+    u_long blockingMode = 0;
+#endif     /* Ask the TCP/IP stack for an unused port */     srv_addr.sin_family      = AF_INET;     srv_addr.sin_port
      = htons( 0 );     srv_addr.sin_addr.s_addr = htonl( INADDR_ANY );          #ifdef WIN32
 
-    WORD wVersionRequested;
-    WSADATA wsaData;
-    int err;
-     wVersionRequested = MAKEWORD( 2, 2 );
     err = WSAStartup( wVersionRequested, &wsaData );
@@ -1197,7 +1199,6 @@     listen( sockfd, 2 );          #ifdef WIN32
-    u_long blockingMode = 0;
     ioctlsocket( sockfd, FIONBIO,  &blockingMode ); #endif