New function to support --version option

2006-10-08  Soren Sandmann <sandmann@redhat.com>

	* sysprof.c (process_options): New function to support --version option

ChangeLog

@@ -1,3 +1,7 @@
+2006-10-08  Soren Sandmann <sandmann@redhat.com> 
+
+	* sysprof.c (process_options): New function to support --version option
+
 2006-10-08  Soren Sandmann  <sandmann@redhat.com>
 
 	* elfparser.c (struct ElfParser): Add a cache of the text section.

TODO

@@ -34,10 +34,8 @@ Before 1.0.4:
 
 Before 1.2:
 
-* Fix (potential) performance issues in symbol lookup.
-
 * Elf bugs:
-	- Also error handling for bin_parser is necessary.
+	- error handling for bin_parser is necessary.
 
 	- don't loop infinitely if there are cycles in the debuglink graph.
 
@@ -58,6 +56,7 @@ Before 1.2:
 		- userspace can look at _stext and _etext to determine 
 		  start and end of kernel text segment
 		- copying kernel stack to userspace
+			- it's always 4096 bytes these days
 		- heuristically determine functions based on address
 		- is eh_frame usually loaded into memory during normal
 		  operation
@@ -66,13 +65,14 @@ Before 1.2:
 		- assume its the same across processes, just look at
 		  sysprof's own copy.
 		- send copy of it to userspace once, or for every
-		  sample
+		  sample. 
 
 	- regular elf
 		- usually have eh_frame section which is mapped into memory
 		  during normal operation
-		- is usually mapped into memory
 		- do stackwalk in kernel based on eh_frame
+		- eh_frame section is usually mapped into memory, so
+		  no file reading in kernel would be necessary.
 		- do stackwalk in userland based on eh_frame
 		- do ebp based stackwalk in kernel
 		- do ebp based stackwalk in userland
@@ -84,7 +84,7 @@ Before 1.2:
 
 * See if we can make "In file <blah>" not be treated as a recursive function.
   Maybe simply treat each individual address in the file as a function.
-  Or try to parse the machine code. Places that are called are likely 
+  Or try to parse the machine code. Positions that are called are likely 
   to be functions.
 
 * Give more sensible 'error messages'. Ie., if you get permission denied for
@@ -652,6 +652,7 @@ Later:
 
 -=-=-=-=-=-=-=-=-=-=-=-=-=-=- ALREADY DONE -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
 
+* Fix (potential) performance issues in symbol lookup.
 
 - when an elf file is read, it should be checked that the various
   sections are of the right type. For example the debug information

sysprof.c

@@ -23,6 +23,8 @@
 #include <glade/glade.h>
 #include <errno.h>
 #include <glib/gprintf.h>
+#include <string.h>
+#include <stdlib.h>
 
 #include "treeviewutils.h"
 #include "profile.h"
@@ -1550,11 +1552,46 @@ load_file (gpointer data)
     return FALSE;
 }
 
+static const char *
+process_options (int           argc,
+		 char        **argv)
+{
+    int i;
+    gboolean show_version = FALSE;
+    const char *filename = NULL;
+    
+    for (i = 1; i < argc; ++i)
+    {
+	char *option = argv[i];
+	
+	if (strcmp (option, "--version") == 0)
+	{
+	    show_version = TRUE;
+	}
+	else if (!filename)
+	{
+	    filename = argv[i];
+	}
+    }
+
+    if (show_version)
+    {
+	g_print ("%s %s\n", APPLICATION_NAME, PACKAGE_VERSION);
+	
+	exit (1);
+    }
+
+    return filename;
+}
+
 int
 main (int    argc,
       char **argv)
 {
     Application *app;
+    const char *filename;
+    
+    filename = process_options (argc, argv);
     
     gtk_init (&argc, &argv);
     
@@ -1575,10 +1612,10 @@ main (int    argc,
     
     update_sensitivity (app);
     
-    if (argc > 1)
+    if (filename)
     {
 	FileOpenData *file_open_data = g_new0 (FileOpenData, 1);
-	file_open_data->filename = argv[1];
+	file_open_data->filename = filename;
 	file_open_data->app = app;
 	
 	/* This has to run at G_PRIORITY_LOW because of bug 350517