added socket() / sclose() checks to the memdebug system

lib/memdebug.c

@@ -43,6 +43,14 @@
 
 #include <curl/curl.h>
 
+#if defined(WIN32) && !defined(__GNUC__) || defined(__MINGW32__)
+#include <winsock.h>
+#else /* some kind of unix */
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+#endif
+
 #define _MPRINTF_REPLACE
 #include <curl/mprintf.h>
 #include "urldata.h"
@@ -50,6 +58,8 @@
 #include <string.h>
 #include <stdlib.h>
 
+/* DONT include memdebug.h here! */
+
 /*
  * Note that these debug functions are very simple and they are meant to
  * remain so. For advanced analysis, record a log file and write perl scripts
@@ -115,4 +125,21 @@ void curl_dofree(void *ptr, int line, char *source)
           source, line, ptr);
 }
 
+int curl_socket(int domain, int type, int protocol, int line, char *source)
+{
+  int sockfd=(socket)(domain, type, protocol);
+  fprintf(logfile?logfile:stderr, "FD %s:%d socket() = %d\n",
+          source, line, sockfd);
+  return sockfd;
+}
+
+/* this is our own defined way to close sockets on *ALL* platforms */
+int curl_sclose(int sockfd, int line, char *source)
+{
+  int res=sclose(sockfd);
+  fprintf(logfile?logfile:stderr, "FD %s:%d sclose(%d)\n",
+          source, line, sockfd);
+  return sockfd;
+}
+
 #endif /* MALLOCDEBUG */

lib/memdebug.h

@@ -1,13 +1,26 @@
 #ifdef MALLOCDEBUG
+/* memory functions */
 void *curl_domalloc(size_t size, int line, char *source);
 void *curl_dorealloc(void *ptr, size_t size, int line, char *source);
 void curl_dofree(void *ptr, int line, char *source);
 char *curl_dostrdup(char *str, int line, char *source);
 void curl_memdebug(char *logname);
 
+/* file descriptor manipulators */
+int curl_socket(int domain, int type, int protocol, int, char *);
+int curl_sclose(int sockfd, int, char *);
+
 /* Set this symbol on the command-line, recompile all lib-sources */
 #define strdup(ptr) curl_dostrdup(ptr, __LINE__, __FILE__)
 #define malloc(size) curl_domalloc(size, __LINE__, __FILE__)
 #define realloc(ptr,size) curl_dorealloc(ptr, size, __LINE__, __FILE__)
 #define free(ptr) curl_dofree(ptr, __LINE__, __FILE__)
+
+#define socket(domain,type,protocol)\
+ curl_socket(domain,type,protocol,__LINE__,__FILE__)
+
+/* sclose is probably already defined, redefine it! */
+#undef sclose
+#define sclose(sockfd) curl_sclose(sockfd,__LINE__,__FILE__)
+
 #endif

memanalyze.pl

@@ -72,6 +72,28 @@ while(<STDIN>) {
             print "Not recognized input line: $function\n";
         }        
     }
+    # FD url.c:1282 socket() = 5
+    elsif($_ =~ /^FD ([^:]*):(\d*) (.*)/) {
+        # generic match for the filename+linenumber
+        $source = $1;
+        $linenum = $2;
+        $function = $3;
+
+        if($function =~ /socket\(\) = (\d*)/) {
+            $filedes{$1}=1;
+            $getfile{$1}="$source:$linenum";
+            $openfile++;
+        }
+        elsif($function =~ /sclose\((\d*)\)/) {
+            if($filedes{$1} != 1) {
+                print "Close without open: $line\n";
+            }
+            else {
+                $filedes{$1}=0; # closed now
+                $openfile--;
+            }
+        }
+    }
     else {
         print "Not recognized prefix line: $line\n";
     }
@@ -93,3 +115,10 @@ if($totalmem) {
     }
 }
 
+if($openfile) {
+    for(keys %filedes) {
+        if($filedes{$_} == 1) {
+            print "Open file descriptor created at ".$getfile{$_}."\n";
+        }
+    }
+}