[runtime] Move the monograph tool to tools/.

5 files changed, 1393 insertions, 1 deletions

diff --git a/tools/Makefile.am b/tools/Makefile.am
index bb0c96eb1d4..3b30bc16f83 100644
--- a/tools/Makefile.am
+++ b/tools/Makefile.am
@@ -1,2 +1,3 @@
-SUBDIRS = locale-builder sgen
+SUBDIRS = locale-builder sgen monograph
+
 
diff --git a/tools/monograph/.gitignore b/tools/monograph/.gitignore
new file mode 100644
index 00000000000..d249ec9ca4f
--- /dev/null
+++ b/tools/monograph/.gitignore
@@ -0,0 +1,9 @@
+/.deps
+/.libs
+/Makefile
+/Makefile.in
+/monograph
+/*.o
+/*.lo
+/*.exe
+/TAGS
diff --git a/tools/monograph/ChangeLog b/tools/monograph/ChangeLog
new file mode 100644
index 00000000000..b621d83355b
--- /dev/null
+++ b/tools/monograph/ChangeLog
@@ -0,0 +1,115 @@
+
+Wed Feb 24 15:56:52 CET 2010 Paolo Molaro <lupus@ximian.com>
+
+	* Makefile.am, monograph.c: update to the new API/ABI.
+
+2009-08-18  Christian Hergert  <chris@dronelabs.com>
+
+	* monograph.c: Fix printf warnings.
+
+Mon Sep 10 15:03:06 CEST 2007 Paolo Molaro <lupus@ximian.com>
+
+	* monograph.c: added --size option to collect size statistics
+	per-type (best used with a pipe to sort -n -k3).
+
+2007-03-13  Jonathan Chambers  <joncham@gmail.com>
+
+	* monograph.vcproj: Move to msvc directory.
+	
+2007-03-13  Jonathan Chambers  <joncham@gmail.com>
+
+	* monograph.vcproj: Begin WIN64 port.
+	
+Fri Jan 26 12:37:14 CET 2007 Paolo Molaro <lupus@ximian.com>
+
+	* monograph.c: warning fixes.
+
+Tue Mar 21 16:01:26 CET 2006 Paolo Molaro <lupus@ximian.com>
+
+	* monograph.c: fixes to be able to deal with 2.0 assemblies
+	and more stats.
+
+Wed Feb 22 15:11:37 CET 2006 Paolo Molaro <lupus@ximian.com>
+
+	* monograph.c: update after MonoMethodHeader changes.
+
+Tue Jan 24 18:57:46 CET 2006 Paolo Molaro <lupus@ximian.com>
+
+	* monograph.c: misc fixes and parent depth stats.
+
+2005-05-26  Sebastien Pouliot  <sebastien@ximian.com>
+
+	* monograph.vcproj: Project file for monograph.
+
+2005-03-29  Sebastien Pouliot  <sebastien@ximian.com>
+
+	* monograph.c: Add mono-compiler.h header to allow/ease compilation
+	with non-GCC compilers. Fix default loading of mscorlib.dll.
+
+2005-02-09  Ben Maurer  <bmaurer@ximian.com>
+
+	* monograph.c (print_method): Don't use method->info, as this will
+	be removed soon.
+
+2005-02-03  Zoltan Varga  <vargaz@freemail.hu>
+
+	* monograph.c: Fix warnings.
+
+Mon May 24 13:36:53 CEST 2004 Paolo Molaro <lupus@ximian.com>
+
+	* monograph.c: default assembly name is "mscorlib" now.
+
+2003-11-12  Jackson Harper  <jackson@ximian.com>
+
+	* monograph.c: Change default assembly name to mscorlib.dll
+	
+Thu Feb  6 02:43:23 PST 2003 Piers Haken <piersh@friskit.com>
+
+	* monograph.c: more warning cleanups
+
+Tue Jan 28 18:53:08 CET 2003 Paolo Molaro <lupus@ximian.com>
+
+	* monograph.c: more stats added.
+
+Mon Oct 7 12:25:15 CEST 2002 Paolo Molaro <lupus@ximian.com>
+
+	* monograph.c: added a --stats command line option to gather
+	statistics about the assembly code.
+
+2002-08-28  Dick Porter  <dick@ximian.com>
+
+	* Makefile.am: Export HOST_CC for w32 builds
+
+Fri Jul 19 14:23:46 CEST 2002 Paolo Molaro <lupus@ximian.com>
+
+	* monograph.c: simple stats on opcode size.
+
+Thu Mar 28 15:18:50 CET 2002 Paolo Molaro <lupus@ximian.com>
+
+	* monograph.c: some warning cleanups.
+
+Mon Mar 11 11:58:27 CET 2002 Paolo Molaro <lupus@ximian.com>
+
+	* monograph.c: update --help output, Make error messages less
+	intimidating and more informative.
+
+Mon Mar 11 11:16:53 CET 2002 Paolo Molaro <lupus@ximian.com>
+
+	* monograph.c: removed method signature and searching helpers
+	that are now provided in libmetadata. Added --control-flow option to
+	create a control flow graph of a method, with basic blocks etc.
+
+Wed Feb 20 17:53:59 CET 2002 Paolo Molaro <lupus@ximian.com>
+
+	* monograph.c: added -i option to create a graph of the types
+	implementing an interface.
+
+Tue Feb 19 12:24:15 CET 2002 Paolo Molaro <lupus@ximian.com>
+
+	* monograph.c: fix typo. Update for changes in mono_init ().
+
+Mon Feb 18 14:37:17 CET 2002 Paolo Molaro <lupus@ximian.com>
+
+	* monograph.c: First commit: program to generate call graphs
+	or type hierarchies from CIL programs.
+
diff --git a/tools/monograph/Makefile.am b/tools/monograph/Makefile.am
new file mode 100644
index 00000000000..c2b1aa45095
--- /dev/null
+++ b/tools/monograph/Makefile.am
@@ -0,0 +1,60 @@
+
+if HOST_WIN32
+export HOST_CC
+endif
+
+if DISABLE_EXECUTABLES
+runtime_lib=$(top_builddir)/mono/mini/$(LIBMONO_LA) $(static_libs)
+else
+if !SHARED_MONO
+static_libs=	\
+	$(top_builddir)/mono/metadata/libmonoruntime-static.la	\
+	$(top_builddir)/mono/io-layer/libwapi.la	\
+	$(top_builddir)/mono/utils/libmonoutils.la \
+	$(GLIB_LIBS) $(LIBICONV) \
+	$(LIBGC_STATIC_LIBS)
+
+runtime_lib=$(top_builddir)/mono/mini/$(LIBMONO_LA) $(static_libs)
+else
+runtime_lib=$(top_builddir)/mono/mini/$(LIBMONO_LA)
+endif
+endif
+
+if DISABLE_EXECUTABLES
+bin_PROGRAMS =
+else
+if DISABLE_LIBRARIES
+bin_PROGRAMS =
+else
+if SUPPORT_BOEHM
+bin_PROGRAMS = monograph
+endif
+endif
+endif
+
+AM_CPPFLAGS = 				\
+	-I$(top_srcdir)			\
+	$(GLIB_CFLAGS)
+
+monograph_LDADD = \
+	$(runtime_lib)			\
+	$(GLIB_LIBS)			\
+	$(LLVM_LIBS)			\
+	$(LIBICONV)			\
+	-lm
+
+if PLATFORM_DARWIN
+monograph_LDFLAGS=-framework CoreFoundation
+endif
+
+GRAPHS=System.Object System.Enum System.Attribute System.ValueType System.Reflection.MemberInfo
+OUT=$(GRAPHS:=.jpeg)
+
+graphs: $(OUT)
+
+%.jpeg: monograph
+	./monograph -n -o $*.png corlib.dll $*
+	convert -geometry '480x360>' $*.png $*.jpeg
+
+EXTRA_DIST = ChangeLog
+
diff --git a/tools/monograph/monograph.c b/tools/monograph/monograph.c
new file mode 100644
index 00000000000..27f1a5f3cf9
--- /dev/null
+++ b/tools/monograph/monograph.c
@@ -0,0 +1,1207 @@
+#include <glib.h>
+#include <string.h>
+#include <math.h>
+#include "mono/metadata/metadata-internals.h"
+#include "mono/metadata/class-internals.h"
+#include "mono/metadata/assembly.h"
+#include "mono/metadata/tokentype.h"
+#include "mono/metadata/opcodes.h"
+#include "mono/metadata/tabledefs.h"
+#include "mono/metadata/mono-endian.h"
+#include "mono/metadata/appdomain.h" /* mono_init */
+#include "mono/metadata/debug-helpers.h"
+#include "mono/utils/mono-compiler.h"
+
+static FILE *output;
+static int include_namespace = 0;
+static int max_depth = 6;
+static int verbose = 0;
+static const char *graph_properties = "\tnode [fontsize=8.0]\n\tedge [len=2,color=red]\n";
+
+#if defined(__native_client__) || defined(__native_client_codegen__)
+volatile int __nacl_thread_suspension_needed = 0;
+void __nacl_suspend_thread_if_needed() {}
+#endif
+
+static void
+output_type_edge (MonoClass *first, MonoClass *second) {
+	if (include_namespace)
+		fprintf (output, "\t\"%s.%s\" -> \"%s.%s\"\n", first->name_space, first->name, second->name_space, second->name);
+	else
+		fprintf (output, "\t\"%s\" -> \"%s\"\n", first->name, second->name);
+}
+
+static void
+print_subtypes (MonoImage *image, MonoClass *class, int depth) {
+	int i, token;
+	const MonoTableInfo *t;
+	MonoClass *child;
+
+	if (depth++ > max_depth)
+		return;
+
+	t = mono_image_get_table_info (image, MONO_TABLE_TYPEDEF);
+	
+	token = mono_metadata_token_index (class->type_token);
+	token <<= MONO_TYPEDEFORREF_BITS;
+	token |= MONO_TYPEDEFORREF_TYPEDEF;
+
+	/* use a subgraph? */
+	for (i = 0; i < mono_table_info_get_rows (t); ++i) {
+		if (token == mono_metadata_decode_row_col (t, i, MONO_TYPEDEF_EXTENDS)) {
+			child = mono_class_get (image, MONO_TOKEN_TYPE_DEF | (i + 1));
+			output_type_edge (class, child);
+			print_subtypes (image, child, depth);
+		}
+	}
+}
+
+static void
+type_graph (MonoImage *image, const char* cname) {
+	MonoClass *class;
+	MonoClass *parent;
+	MonoClass *child;
+	const char *name_space;
+	char *p;
+	int depth = 0;
+
+	cname = g_strdup (cname);
+	p = strrchr (cname, '.');
+	if (p) {
+		name_space = cname;
+		*p++ = 0;
+		cname = p;
+	} else {
+		name_space = "";
+	}
+	class = mono_class_from_name (image, name_space, cname);
+	if (!class) {
+		g_print ("class %s.%s not found\n", name_space, cname);
+		exit (1);
+	}
+	fprintf (output, "digraph blah {\n");
+	fprintf (output, "%s", graph_properties);
+	child = class;
+	/* go back and print the parents for the node as well: not sure it's a good idea */
+	for (parent = class->parent; parent; parent = parent->parent) {
+		output_type_edge (parent, child);
+		child = parent;
+	}
+	print_subtypes (image, class, depth);
+	fprintf (output, "}\n");
+}
+
+static void
+interface_graph (MonoImage *image, const char* cname) {
+	MonoClass *class;
+	MonoClass *child;
+	const char *name_space;
+	char *p;
+	guint32 cols [MONO_INTERFACEIMPL_SIZE];
+	guint32 token, i, count = 0;
+	const MonoTableInfo *intf = mono_image_get_table_info (image, MONO_TABLE_INTERFACEIMPL);
+
+	cname = g_strdup (cname);
+	p = strrchr (cname, '.');
+	if (p) {
+		name_space = cname;
+		*p++ = 0;
+		cname = p;
+	} else {
+		name_space = "";
+	}
+	class = mono_class_from_name (image, name_space, cname);
+	if (!class) {
+		g_print ("interface %s.%s not found\n", name_space, cname);
+		exit (1);
+	}
+	/* chek if it's really an interface... */
+	fprintf (output, "digraph interface {\n");
+	fprintf (output, "%s", graph_properties);
+	/* TODO: handle inetrface defined in one image and class defined in another. */
+	token = mono_metadata_token_index (class->type_token);
+	token <<= MONO_TYPEDEFORREF_BITS;
+	token |= MONO_TYPEDEFORREF_TYPEDEF;
+	for (i = 0; i < mono_table_info_get_rows (intf); ++i) {
+		mono_metadata_decode_row (intf, i, cols, MONO_INTERFACEIMPL_SIZE);
+		/*g_print ("index: %d [%d implements %d]\n", index, cols [MONO_INTERFACEIMPL_CLASS], cols [MONO_INTERFACEIMPL_INTERFACE]);*/
+		if (token == cols [MONO_INTERFACEIMPL_INTERFACE]) {
+			child = mono_class_get (image, MONO_TOKEN_TYPE_DEF | cols [MONO_INTERFACEIMPL_CLASS]);
+			output_type_edge (class, child);
+			count++;
+		}
+	}
+	fprintf (output, "}\n");
+	if (verbose && !count)
+		g_print ("No class implements %s.%s\n", class->name_space, class->name);
+
+}
+
+static int back_branch_waste = 0;
+static int branch_waste = 0;
+static int var_waste = 0;
+static int int_waste = 0;
+static int nop_waste = 0;
+static int has_exceptions = 0;
+static int num_exceptions = 0;
+static int max_exceptions = 0;
+static int has_locals = 0;
+static int num_locals = 0;
+static int max_locals = 0;
+static int has_args = 0;
+static int num_args = 0;
+static int max_args = 0;
+static int has_maxstack = 0;
+static int num_maxstack = 0;
+static int max_maxstack = 0;
+static int has_code = 0;
+static int num_code = 0;
+static int max_code = 0;
+static int has_branch = 0;
+static int num_branch = 0;
+static int max_branch = 0;
+static int has_condbranch = 0;
+static int num_condbranch = 0;
+static int max_condbranch = 0;
+static int has_calls = 0;
+static int num_calls = 0;
+static int max_calls = 0;
+static int has_throw = 0;
+static int num_throw = 0;
+static int max_throw = 0;
+static int has_switch = 0;
+static int num_switch = 0;
+static int max_switch = 0;
+static int cast_sealed = 0;
+static int cast_iface = 0;
+static int total_cast = 0;
+static int nonvirt_callvirt = 0;
+static int iface_callvirt = 0;
+static int total_callvirt = 0;
+
+static void
+method_stats (MonoMethod *method) {
+	const MonoOpcode *opcode;
+	MonoMethodHeader *header;
+	MonoMethodSignature *sig;
+	const unsigned char *ip, *il_code_end;
+	guint32 i, n;
+	int local_branch = 0, local_condbranch = 0, local_throw = 0, local_calls = 0;
+	gint64 l;
+
+	if (method->iflags & (METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL | METHOD_IMPL_ATTRIBUTE_RUNTIME))
+		return;
+	if (method->flags & (METHOD_ATTRIBUTE_PINVOKE_IMPL | METHOD_ATTRIBUTE_ABSTRACT))
+		return;
+
+	header = mono_method_get_header (method);
+	n = mono_method_header_get_num_clauses (header);
+	if (n)
+		has_exceptions++;
+	num_exceptions += n;
+	if (max_exceptions < n)
+		max_exceptions = n;
+	mono_method_header_get_locals (header, &n, NULL);
+	if (n)
+		has_locals++;
+	num_locals += n;
+	if (max_locals < n)
+		max_locals = n;
+
+	ip = mono_method_header_get_code (header, &n, &i);
+	il_code_end = ip + n;
+	if (max_maxstack < i)
+		max_maxstack = i;
+	num_maxstack += i;
+	if (i != 8) /* just a guess */
+		has_maxstack++;
+
+	sig = mono_method_signature (method);
+	n = sig->hasthis + sig->param_count;
+	if (max_args < n)
+		max_args = n;
+	num_args += n;
+	if (n)
+		has_args++;
+
+	has_code++;
+	if (max_code < il_code_end - ip)
+		max_code = il_code_end - ip;
+	num_code += il_code_end - ip;
+
+	while (ip < il_code_end) {
+		if (*ip == 0xfe) {
+			++ip;
+			i = *ip + 256;
+		} else {
+			i = *ip;
+		}
+
+		opcode = &mono_opcodes [i];
+
+		switch (opcode->argument) {
+		case MonoInlineNone:
+			if (i == MONO_CEE_NOP)
+				nop_waste++;
+			++ip;
+			break;
+		case MonoInlineI:
+			n = read32 (ip + 1);
+			if (n >= -1 && n <= 8) {
+				int_waste += 4;
+				g_print ("%s %d\n", mono_opcode_name (i), n);
+			} else if (n < 128 && n >= -128) {
+				int_waste += 3;
+				g_print ("%s %d\n", mono_opcode_name (i), n);
+			}
+			ip += 5;
+			break;
+		case MonoInlineType:
+			if (i == MONO_CEE_CASTCLASS || i == MONO_CEE_ISINST) {
+				guint32 token = read32 (ip + 1);
+				MonoClass *k = mono_class_get (method->klass->image, token);
+				if (k && k->flags & TYPE_ATTRIBUTE_SEALED)
+					cast_sealed++;
+				if (k && k->flags & TYPE_ATTRIBUTE_INTERFACE)
+					cast_iface++;
+				total_cast++;
+			}
+			ip += 5;
+			break;
+		case MonoInlineField:
+		case MonoInlineTok:
+		case MonoInlineString:
+		case MonoInlineSig:
+		case MonoShortInlineR:
+			ip += 5;
+			break;
+		case MonoInlineBrTarget:
+			n = read32 (ip + 1);
+			if (n < 128 && n >= -128) {
+				branch_waste += 3;
+				if (n < 0)
+					back_branch_waste += 3;
+			}
+			ip += 5;
+			break;
+		case MonoInlineVar:
+			n = read16 (ip + 1);
+			if (n < 256) {
+				if (n < 4) {
+					switch (i) {
+					case MONO_CEE_LDARG:
+					case MONO_CEE_LDLOC:
+					case MONO_CEE_STLOC:
+						var_waste += 3;
+						/*g_print ("%s %d\n", mono_opcode_name (i), n);*/
+						break;
+					default:
+						var_waste += 2;
+						/*g_print ("%s %d\n", mono_opcode_name (i), n);*/
+						break;
+					}
+				} else {
+					var_waste += 2;
+					/*g_print ("%s %d\n", mono_opcode_name (i), n);*/
+				}
+			}
+			ip += 3;
+			break;
+		case MonoShortInlineVar:
+			if ((signed char)ip [1] < 4 && (signed char)ip [1] >= 0) {
+				switch (i) {
+				case MONO_CEE_LDARG_S:
+				case MONO_CEE_LDLOC_S:
+				case MONO_CEE_STLOC_S:
+					var_waste++;
+					/*g_print ("%s %d\n", mono_opcode_name (i), (signed char)ip [1]);*/
+					break;
+				default:
+					break;
+				}
+			}
+			ip += 2;
+			break;
+		case MonoShortInlineI:
+			if ((signed char)ip [1] <= 8 && (signed char)ip [1] >= -1) {
+				/*g_print ("%s %d\n", mono_opcode_name (i), (signed char)ip [1]);*/
+				int_waste ++;
+			}
+			ip += 2;
+			break;
+		case MonoShortInlineBrTarget:
+			ip += 2;
+			break;
+		case MonoInlineSwitch: {
+			gint32 n;
+			++ip;
+			n = read32 (ip);
+			ip += 4;
+			ip += 4 * n;
+			num_switch += n;
+			has_switch++;
+			if (max_switch < n)
+				max_switch = n;
+			break;
+		}
+		case MonoInlineR:
+			ip += 9;
+			break;
+		case MonoInlineI8:
+			l = read64 (ip + 1);
+			/* should load and convert */
+			if (l >= -1 && l <= 8) {
+				int_waste += 7;
+			} else if (l < 128 && l >= -128) {
+				int_waste += 6;
+			} else if (l <= 2147483647 && l >= (-2147483647 -1)) {
+				int_waste += 3;
+			}
+			ip += 9;
+			break;
+		case MonoInlineMethod:
+			if (i == MONO_CEE_CALLVIRT) {
+				MonoMethod *cm = mono_get_method (method->klass->image, read32 (ip + 1), NULL);
+				if (cm && !(cm->flags & METHOD_ATTRIBUTE_VIRTUAL))
+					nonvirt_callvirt++;
+				if (cm && (cm->klass->flags & TYPE_ATTRIBUTE_INTERFACE))
+					iface_callvirt++;
+				total_callvirt++;
+			}
+			ip += 5;
+			break;
+		default:
+			g_assert_not_reached ();
+		}
+
+		switch (opcode->flow_type) {
+		case MONO_FLOW_BRANCH:
+			local_branch++;
+			break;
+		case MONO_FLOW_COND_BRANCH:
+			local_condbranch++;
+			break;
+		case MONO_FLOW_CALL:
+			local_calls++;
+			break;
+		case MONO_FLOW_ERROR:
+			local_throw++;
+			break;
+		}
+	}
+	
+	if (local_branch)
+		has_branch++;
+	if (max_branch < local_branch)
+		max_branch = local_branch;
+	num_branch += local_branch;
+
+	if (local_condbranch)
+		has_condbranch++;
+	if (max_condbranch < local_condbranch)
+		max_condbranch = local_condbranch;
+	num_condbranch += local_condbranch;
+
+	if (local_calls)
+		has_calls++;
+	if (max_calls < local_calls)
+		max_calls = local_calls;
+	num_calls += local_calls;
+
+	if (local_throw)
+		has_throw++;
+	if (max_throw < local_throw)
+		max_throw = local_throw;
+	num_throw += local_throw;
+
+	return;
+}
+
+static int num_pdepth = 0;
+static int max_pdepth = 0;
+static int num_pdepth_ovf = 0;
+static int num_ifaces = 0;
+static int *pdepth_array = NULL;
+static int pdepth_array_size = 0;
+static int pdepth_array_next = 0;
+
+static void
+type_stats (MonoClass *klass) {
+	MonoClass *parent;
+	int depth = 1;
+
+	if (klass->flags & TYPE_ATTRIBUTE_INTERFACE) {
+		num_ifaces++;
+		return;
+	}
+	parent = klass->parent;
+	while (parent) {
+		depth++;
+		parent = parent->parent;
+	}
+	if (pdepth_array_next >= pdepth_array_size) {
+		pdepth_array_size *= 2;
+		if (!pdepth_array_size)
+			pdepth_array_size = 128;
+		pdepth_array = g_realloc (pdepth_array, pdepth_array_size * sizeof (int));
+	}
+	pdepth_array [pdepth_array_next++] = depth;
+	num_pdepth += depth;
+	if (max_pdepth < depth)
+		max_pdepth = depth;
+	if (depth > MONO_DEFAULT_SUPERTABLE_SIZE) {
+		/*g_print ("overflow parent depth: %s.%s\n", klass->name_space, klass->name);*/
+		num_pdepth_ovf++;
+	}
+}
+
+static void
+stats (MonoImage *image, const char *name) {
+	int i, num_methods, num_types;
+	MonoMethod *method;
+	MonoClass *klass;
+	
+	num_methods = mono_image_get_table_rows (image, MONO_TABLE_METHOD);
+	for (i = 0; i < num_methods; ++i) {
+		method = mono_get_method (image, MONO_TOKEN_METHOD_DEF | (i + 1), NULL);
+		method_stats (method);
+	}
+	num_types = mono_image_get_table_rows (image, MONO_TABLE_TYPEDEF);
+	for (i = 0; i < num_types; ++i) {
+		klass = mono_class_get (image, MONO_TOKEN_TYPE_DEF | (i + 1));
+		type_stats (klass);
+	}
+
+	g_print ("Methods and code stats:\n");
+	g_print ("back branch waste: %d\n", back_branch_waste);
+	g_print ("branch waste: %d\n", branch_waste);
+	g_print ("var waste: %d\n", var_waste);
+	g_print ("int waste: %d\n", int_waste);
+	g_print ("nop waste: %d\n", nop_waste);
+	g_print ("has exceptions: %d/%d, total: %d, max: %d, mean: %f\n", has_exceptions, num_methods, num_exceptions, max_exceptions, num_exceptions/(double)has_exceptions);
+	g_print ("has locals: %d/%d, total: %d, max: %d, mean: %f\n", has_locals, num_methods, num_locals, max_locals, num_locals/(double)has_locals);
+	g_print ("has args: %d/%d, total: %d, max: %d, mean: %f\n", has_args, num_methods, num_args, max_args, num_args/(double)has_args);
+	g_print ("has maxstack: %d/%d, total: %d, max: %d, mean: %f\n", has_maxstack, num_methods, num_maxstack, max_maxstack, num_maxstack/(double)i);
+	g_print ("has code: %d/%d, total: %d, max: %d, mean: %f\n", has_code, num_methods, num_code, max_code, num_code/(double)has_code);
+	g_print ("has branch: %d/%d, total: %d, max: %d, mean: %f\n", has_branch, num_methods, num_branch, max_branch, num_branch/(double)has_branch);
+	g_print ("has condbranch: %d/%d, total: %d, max: %d, mean: %f\n", has_condbranch, num_methods, num_condbranch, max_condbranch, num_condbranch/(double)has_condbranch);
+	g_print ("has switch: %d/%d, total: %d, max: %d, mean: %f\n", has_switch, num_methods, num_switch, max_switch, num_switch/(double)has_switch);
+	g_print ("has calls: %d/%d, total: %d, max: %d, mean: %f\n", has_calls, num_methods, num_calls, max_calls, num_calls/(double)has_calls);
+	g_print ("has throw: %d/%d, total: %d, max: %d, mean: %f\n", has_throw, num_methods, num_throw, max_throw, num_throw/(double)has_throw);
+	g_print ("sealed type cast: %d/%d\n", cast_sealed, total_cast);
+	g_print ("interface type cast: %d/%d\n", cast_iface, total_cast);
+	g_print ("non virtual callvirt: %d/%d\n", nonvirt_callvirt, total_callvirt);
+	g_print ("interface callvirt: %d/%d\n", iface_callvirt, total_callvirt);
+	
+	g_print ("\nType stats:\n");
+	g_print ("interface types: %d/%d\n", num_ifaces, num_types);
+	{
+		double mean = 0;
+		double stddev = 0;
+		if (pdepth_array_next) {
+			int i;
+			mean = (double)num_pdepth/pdepth_array_next;
+			for (i = 0; i < pdepth_array_next; ++i) {
+				stddev += (pdepth_array [i] - mean) * (pdepth_array [i] - mean);
+			}
+			stddev = sqrt (stddev/pdepth_array_next);
+		}
+		g_print ("parent depth: max: %d, mean: %f, sttdev: %f, overflowing: %d\n", max_pdepth, mean, stddev, num_pdepth_ovf);
+	}
+}
+
+static void
+type_size_stats (MonoClass *klass)
+{
+	int code_size = 0;
+	MonoMethod *method;
+	MonoMethodHeader *header;
+	gpointer iter;
+
+	iter = NULL;
+	while ((method = mono_class_get_methods (klass, &iter))) {
+		guint32 size, maxs;
+		header = mono_method_get_header (method);
+		if (!header)
+			continue;
+		mono_method_header_get_code (header, &size, &maxs);
+		code_size += size;
+	}
+	g_print ("%s.%s: code: %d\n", klass->name_space, klass->name, code_size);
+}
+
+static void
+size_stats (MonoImage *image, const char *name) {
+	int i, num_types;
+	MonoClass *klass;
+	
+	num_types = mono_image_get_table_rows (image, MONO_TABLE_TYPEDEF);
+	for (i = 0; i < num_types; ++i) {
+		klass = mono_class_get (image, MONO_TOKEN_TYPE_DEF | (i + 1));
+		type_size_stats (klass);
+	}
+}
+
+
+static char *
+get_signature (MonoMethod *method) {
+	GString *res;
+	static GHashTable *hash = NULL;
+	char *result;
+
+	if (!hash)
+		hash = g_hash_table_new (g_direct_hash, g_direct_equal);
+	if ((result = g_hash_table_lookup (hash, method)))
+		return result;
+
+	res = g_string_new ("");
+	if (include_namespace && *(method->klass->name_space))
+		g_string_append_printf (res, "%s.", method->klass->name_space);
+	result = mono_signature_get_desc (mono_method_signature (method), include_namespace);
+	g_string_append_printf (res, "%s:%s(%s)", method->klass->name, method->name, result);
+	g_free (result);
+	g_hash_table_insert (hash, method, res->str);
+
+	result = res->str;
+	g_string_free (res, FALSE);
+	return result;
+		
+}
+
+static void
+output_method_edge (MonoMethod *first, MonoMethod *second) {
+	char * f = get_signature (first);
+	char * s = get_signature (second);
+	
+	fprintf (output, "\t\"%s\" -> \"%s\"\n", f, s);
+}
+
+/*
+ * We need to handle virtual calls is derived types.
+ * We could check what types implement the method and
+ * disassemble all of them: this can make the graph to explode.
+ * We could try and keep track of the 'this' pointer type and
+ * consider only the methods in the classes derived from that:
+ * this can reduce the graph complexity somewhat (and it would 
+ * be the more correct approach).
+ */
+static void
+print_method (MonoMethod *method, int depth) {
+	const MonoOpcode *opcode;
+	MonoMethodHeader *header;
+	GHashTable *hash;
+	static GHashTable *visited = NULL;
+	const unsigned char *ip, *il_code_end;
+	guint32 i;
+
+	if (depth++ > max_depth)
+		return;
+	
+	if (! visited)
+		visited = g_hash_table_new (NULL, NULL);
+	
+	if (g_hash_table_lookup (visited, method))
+		return;
+	
+	g_hash_table_insert (visited, method, method);
+
+	if (method->iflags & (METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL | METHOD_IMPL_ATTRIBUTE_RUNTIME))
+		return;
+	if (method->flags & (METHOD_ATTRIBUTE_PINVOKE_IMPL | METHOD_ATTRIBUTE_ABSTRACT))
+		return;
+
+	header = mono_method_get_header (method);
+	ip = mono_method_header_get_code (header, &i, NULL);
+	il_code_end = ip + i;
+
+	hash = g_hash_table_new (g_direct_hash, g_direct_equal);
+	
+	while (ip < il_code_end) {
+		if (*ip == 0xfe) {
+			++ip;
+			i = *ip + 256;
+		} else {
+			i = *ip;
+		}
+
+		opcode = &mono_opcodes [i];
+
+		switch (opcode->argument) {
+		case MonoInlineNone:
+			++ip;
+			break;
+		case MonoInlineType:
+		case MonoInlineField:
+		case MonoInlineTok:
+		case MonoInlineString:
+		case MonoInlineSig:
+		case MonoShortInlineR:
+		case MonoInlineI:
+		case MonoInlineBrTarget:
+			ip += 5;
+			break;
+		case MonoInlineVar:
+			ip += 3;
+			break;
+		case MonoShortInlineVar:
+		case MonoShortInlineI:
+		case MonoShortInlineBrTarget:
+			ip += 2;
+			break;
+		case MonoInlineSwitch: {
+			gint32 n;
+			++ip;
+			n = read32 (ip);
+			ip += 4;
+			ip += 4 * n;
+			break;
+		}
+		case MonoInlineR:
+		case MonoInlineI8:
+			ip += 9;
+			break;
+		case MonoInlineMethod: {
+			guint32 token;
+			MonoMethod *called;
+			ip++;
+			token = read32 (ip);
+			ip += 4;
+			called = mono_get_method (method->klass->image, token, NULL);
+			if (!called)
+				break; /* warn? */
+			if (g_hash_table_lookup (hash, called))
+				break;
+			g_hash_table_insert (hash, called, called);
+			output_method_edge (method, called);
+			print_method (called, depth);
+			break;
+		}
+		default:
+			g_assert_not_reached ();
+		}
+	}
+	g_hash_table_destroy (hash);
+}
+
+static void
+method_graph (MonoImage *image, const char *name) {
+	int depth = 0;
+	MonoMethod *method = NULL;
+	
+	if (!name) {
+		guint32 token = mono_image_get_entry_point (image);
+		if (!token || !(method = mono_get_method (image, token, NULL))) {
+			g_print ("Cannot find entry point in %s: specify an explict method name.\n", mono_image_get_filename (image));
+			exit (1);
+		}
+	} else {
+		/* search the method */
+		MonoMethodDesc *desc;
+
+		desc = mono_method_desc_new (name, include_namespace);
+		if (!desc) {
+			g_print ("Invalid method name %s\n", name);
+			exit (1);
+		}
+		method = mono_method_desc_search_in_image (desc, image);
+		if (!method) {
+			g_print ("Cannot find method %s\n", name);
+			exit (1);
+		}
+	}
+	fprintf (output, "digraph blah {\n");
+	fprintf (output, "%s", graph_properties);
+
+	print_method (method, depth);
+	
+	fprintf (output, "}\n");
+}
+
+typedef struct MonoBasicBlock MonoBasicBlock;
+
+struct MonoBasicBlock {
+	const unsigned char* cil_code;
+	gint32 cil_length;
+	gint dfn;
+	GList *in_bb;
+	GList *out_bb;
+};
+
+static const unsigned char *debug_start;
+
+static void
+link_bblock (MonoBasicBlock *from, MonoBasicBlock* to)
+{
+	from->out_bb = g_list_prepend (from->out_bb, to);
+	to->in_bb = g_list_prepend (to->in_bb, from);
+	/*fprintf (stderr, "linking IL_%04x to IL_%04x\n", from->cil_code-debug_start, to->cil_code-debug_start);*/
+}
+
+static int
+compare_bblock (const void *a, const void *b)
+{
+	MonoBasicBlock * const *ab = a;
+	MonoBasicBlock * const *bb = b;
+
+	return (*ab)->cil_code - (*bb)->cil_code;
+}
+
+static GPtrArray*
+mono_method_find_bblocks (MonoMethodHeader *header)
+{
+	const unsigned char *ip, *end, *start;
+	const MonoOpcode *opcode;
+	guint32 i, block_end = 0;
+	GPtrArray *result = g_ptr_array_new ();
+	GHashTable *table = g_hash_table_new (g_direct_hash, g_direct_equal);
+	MonoBasicBlock *entry_bb, *end_bb, *bb, *target;
+
+	ip = mono_method_header_get_code (header, &i, NULL);
+	end = ip + i;
+	debug_start = ip;
+
+	entry_bb = g_new0 (MonoBasicBlock, 1);
+	end_bb = g_new0 (MonoBasicBlock, 1);
+	g_ptr_array_add (result, entry_bb);
+	g_ptr_array_add (result, end_bb);
+
+	bb = g_new0 (MonoBasicBlock, 1);
+	bb->cil_code = ip;
+	g_ptr_array_add (result, bb);
+	link_bblock (entry_bb, bb);
+	g_hash_table_insert (table, (char*)ip, bb);
+	block_end = TRUE;
+
+	/* handle exception code blocks... */
+	while (ip < end) {
+		start = ip;
+		if ((target = g_hash_table_lookup (table, ip)) && target != bb) {
+			if (!block_end)
+				link_bblock (bb, target);
+			bb = target;
+			block_end = FALSE;
+		}
+		if (block_end) {
+			/*fprintf (stderr, "processing bbclok at IL_%04x\n", ip - header->code);*/
+			if (!(bb = g_hash_table_lookup (table, ip))) {
+				bb = g_new0 (MonoBasicBlock, 1);
+				bb->cil_code = ip;
+				g_ptr_array_add (result, bb);
+				g_hash_table_insert (table, (char*)ip, bb);
+			}
+			block_end = FALSE;
+		}
+		if (*ip == 0xfe) {
+			++ip;
+			i = *ip + 256;
+		} else {
+			i = *ip;
+		}
+
+		opcode = &mono_opcodes [i];
+		switch (opcode->flow_type) {
+		case MONO_FLOW_RETURN:
+			link_bblock (bb, end_bb);
+		case MONO_FLOW_ERROR:
+			block_end = 1;
+			break;
+		case MONO_FLOW_BRANCH: /* we handle branch when checking the argument type */
+		case MONO_FLOW_COND_BRANCH:
+		case MONO_FLOW_CALL:
+		case MONO_FLOW_NEXT:
+		case MONO_FLOW_META:
+			break;
+		default:
+			g_assert_not_reached ();
+		}
+		switch (opcode->argument) {
+		case MonoInlineNone:
+			++ip;
+			break;
+		case MonoInlineType:
+		case MonoInlineField:
+		case MonoInlineMethod:
+		case MonoInlineTok:
+		case MonoInlineString:
+		case MonoInlineSig:
+		case MonoShortInlineR:
+		case MonoInlineI:
+			ip += 5;
+			break;
+		case MonoInlineVar:
+			ip += 3;
+			break;
+		case MonoShortInlineVar:
+		case MonoShortInlineI:
+			ip += 2;
+			break;
+		case MonoShortInlineBrTarget:
+		case MonoInlineBrTarget:
+			ip++;
+			if (opcode->argument == MonoShortInlineBrTarget) {
+				i = (signed char)*ip;
+				ip++;
+			} else {
+				i = (gint32) read32 (ip);
+				ip += 4;
+			}
+			if (opcode->flow_type == MONO_FLOW_COND_BRANCH) {
+				if (!(target = g_hash_table_lookup (table, ip))) {
+					target = g_new0 (MonoBasicBlock, 1);
+					target->cil_code = ip;
+					g_ptr_array_add (result, target);
+					g_hash_table_insert (table, (char*)ip, target);
+				}
+				link_bblock (bb, target);
+			}
+			if (!(target = g_hash_table_lookup (table, ip + i))) {
+				target = g_new0 (MonoBasicBlock, 1);
+				target->cil_code = ip + i;
+				g_ptr_array_add (result, target);
+				g_hash_table_insert (table, (char*)ip + i, target);
+			}
+			link_bblock (bb, target);
+			block_end = 1;
+			break;
+		case MonoInlineSwitch: {
+			gint32 n;
+			const char *itarget, *st;
+			++ip;
+			n = read32 (ip);
+			ip += 4;
+			st = (const char*)ip + 4 * n;
+
+			for (i = 0; i < n; i++) {
+				itarget = st + read32 (ip);
+				ip += 4;
+				if (!(target = g_hash_table_lookup (table, itarget))) {
+					target = g_new0 (MonoBasicBlock, 1);
+					target->cil_code = (const guchar*)itarget;
+					g_ptr_array_add (result, target);
+					g_hash_table_insert (table, (gpointer) itarget, target);
+				}
+				link_bblock (bb, target);
+			}
+			/*
+			 * Note: the code didn't set block_end in switch.
+			 */
+			break;
+		}
+		case MonoInlineR:
+		case MonoInlineI8:
+			ip += 9;
+			break;
+		default:
+			g_assert_not_reached ();
+		}
+
+	}
+	g_hash_table_destroy (table);
+	qsort (result->pdata, result->len, sizeof (gpointer), compare_bblock);
+	/* skip entry and end */
+	bb = target = NULL;
+	for (i = 2; i < result->len; ++i) {
+		bb = (MonoBasicBlock*)g_ptr_array_index (result, i);
+		if (target)
+			target->cil_length = bb->cil_code - target->cil_code;
+		target = bb;
+		/*fprintf (stderr, "bblock %d at IL_%04x:\n", i, bb->cil_code - header->code);*/
+	}
+	bb->cil_length = end - bb->cil_code;
+	return result;
+}
+
+static char*
+indenter (MonoDisHelper *dh, MonoMethod *method, guint32 ip_offset)
+{
+	return g_strdup (" ");
+}
+
+static MonoDisHelper graph_dh = {
+	"\\l",
+	NULL,
+	"IL_%04x",
+	indenter, 
+	NULL,
+	NULL
+};
+
+static void
+df_visit (MonoBasicBlock *bb, int *dfn, const unsigned char* code)
+{
+	GList *tmp;
+	MonoBasicBlock *next;
+	
+	if (bb->dfn)
+		return;
+	++(*dfn);
+	bb->dfn = *dfn;
+	for (tmp = bb->out_bb; tmp; tmp = tmp->next) {
+		next = tmp->data;
+		if (!next->dfn) {
+			if (!bb->cil_code)
+				fprintf (output, "\t\"DF entry\" -> \"IL_%04x (%d)\"\n", (unsigned int)(next->cil_code - code), *dfn + 1);
+			else
+				fprintf (output, "\t\"IL_%04x (%d)\" -> \"IL_%04x (%d)\"\n", (unsigned int)(bb->cil_code - code), bb->dfn, (unsigned int)(next->cil_code - code), *dfn + 1);
+			df_visit (next, dfn, code);
+		}
+	}
+}
+
+static void
+print_method_cfg (MonoMethod *method) {
+	GPtrArray *bblocks;
+	GList *tmp;
+	MonoBasicBlock *bb, *target;
+	MonoMethodHeader *header;
+	int i, dfn;
+	char *code;
+	const unsigned char *il_code;
+
+	header = mono_method_get_header (method);
+	il_code = mono_method_header_get_code (header, NULL, NULL);
+	bblocks = mono_method_find_bblocks (header);
+	for (i = 0; i < bblocks->len; ++i) {
+		bb = (MonoBasicBlock*)g_ptr_array_index (bblocks, i);
+		if (i == 0)
+			fprintf (output, "\tB%p [shape=record,label=\"entry\"]\n", bb);
+		else if (i == 1)
+			fprintf (output, "\tB%p [shape=record,label=\"end\"]\n", bb);
+		else {
+			code = mono_disasm_code (&graph_dh, method, bb->cil_code, bb->cil_code + bb->cil_length);
+			fprintf (output, "\tB%p [shape=record,label=\"IL_%04x\\n%s\"]\n", bb, (unsigned int)(bb->cil_code - il_code), code);
+			g_free (code);
+		}
+	}
+	for (i = 0; i < bblocks->len; ++i) {
+		bb = (MonoBasicBlock*)g_ptr_array_index (bblocks, i);
+		for (tmp = bb->out_bb; tmp; tmp = tmp->next) {
+			target = tmp->data;
+			fprintf (output, "\tB%p -> B%p\n", bb, target);
+		}
+	}
+#if 1
+	for (i = 0; i < bblocks->len; ++i) {
+		bb = (MonoBasicBlock*)g_ptr_array_index (bblocks, i);
+		bb->dfn = 0;
+	}
+	dfn = 0;
+	for (i = 0; i < bblocks->len; ++i) {
+		bb = (MonoBasicBlock*)g_ptr_array_index (bblocks, i);
+		df_visit (bb, &dfn, il_code);
+	}
+#endif
+}
+
+/*
+ * TODO: change to create the DF tree, dominance relation etc.
+ */
+static void
+method_cfg (MonoImage *image, const char *name) {
+	MonoMethod *method = NULL;
+	const static char *cfg_graph_properties = "\tnode [fontsize=8.0]\n\tedge [len=1.5,color=red]\n";
+	
+	if (!name) {
+		guint32 token = mono_image_get_entry_point (image);
+		if (!token || !(method = mono_get_method (image, token, NULL))) {
+			g_print ("Cannot find entry point in %s: specify an explict method name.\n", mono_image_get_filename (image));
+			exit (1);
+		}
+	} else {
+		/* search the method */
+		MonoMethodDesc *desc;
+
+		desc = mono_method_desc_new (name, include_namespace);
+		if (!desc) {
+			g_print ("Invalid method name %s\n", name);
+			exit (1);
+		}
+		method = mono_method_desc_search_in_image (desc, image);
+		if (!method) {
+			g_print ("Cannot find method %s\n", name);
+			exit (1);
+		}
+	}
+	fprintf (output, "digraph blah {\n");
+	fprintf (output, "%s", cfg_graph_properties);
+
+	print_method_cfg (method);
+	
+	fprintf (output, "}\n");
+}
+
+static void
+usage (void) {
+	printf ("monograph 0.2 Copyright (c) 2002 Ximian, Inc\n");
+	printf ("Create call graph or type hierarchy information from CIL assemblies.\n");
+	printf ("Usage: monograph [options] [assembly [typename|methodname]]\n\n");
+	printf ("Valid options are:\n");
+	printf ("\t-c|--call             output call graph instead of type hierarchy\n");
+	printf ("\t-C|--control-flow     output control flow of methodname\n");
+	printf ("\t--stats               output some statistics about the assembly\n");
+	printf ("\t--size                output some size statistics about the assembly\n");
+	printf ("\t-d|--depth num        max depth recursion (default: 6)\n");
+	printf ("\t-o|--output filename  write graph to file filename (default: stdout)\n");
+	printf ("\t-f|--fullname         include namespace in type and method names\n");
+	printf ("\t-n|--neato            invoke neato directly\n");
+	printf ("\t-v|--verbose          verbose operation\n\n");
+	printf ("The default assembly is mscorlib.dll. The default method for\n");
+	printf ("the --call and --control-flow options is the entrypoint.\n\n");
+	printf ("When the --neato option is used the output type info is taken\n");
+	printf ("from the output filename extension. You need the graphviz package\n");
+	printf ("installed to be able to use this option and build bitmap files.\n");
+	printf ("Without --neato, monograph will create .dot files, a description\n");
+	printf ("file for a graph.\n\n");
+	printf ("Sample runs:\n");
+	printf ("\tmonograph -n -o vt.png mscorlib.dll System.ValueType\n");
+	printf ("\tmonograph -n -o expr.png mcs.exe Mono.CSharp.Expression\n");
+	printf ("\tmonograph -n -o cfg.png -C mcs.exe Driver:Main\n");
+	printf ("\tmonograph -d 3 -n -o callgraph.png -c mis.exe\n");
+	exit (1);
+}
+
+enum {
+	GRAPH_TYPES,
+	GRAPH_CALL,
+	GRAPH_INTERFACE,
+	GRAPH_CONTROL_FLOW,
+	GRAPH_SIZE_STATS,
+	GRAPH_STATS
+};
+
+/*
+ * TODO:
+ * * virtual method calls as explained above
+ * * maybe track field references
+ * * track what exceptions a method could throw?
+ * * for some inputs neato appears to hang or take a long time: kill it?
+ * * allow passing additional command-line arguments to neato
+ * * allow setting different graph/node/edge options directly
+ * * option to avoid specialname methods
+ * * make --neato option the default?
+ * * use multiple classes/method roots?
+ * * write a manpage
+ * * reverse call graph: given a method what methods call it?
+ */
+int
+main (int argc, char *argv[]) {
+	MonoAssembly *assembly;
+	MonoImage *image;
+	const char *cname = NULL;
+	const char *aname = NULL;
+	char *outputfile = NULL;
+	int graphtype = GRAPH_TYPES;
+	int callneato = 0;
+	int i;
+	
+	output = stdout;
+
+	for (i = 1; i < argc; ++i) {
+		if (argv [i] [0] != '-')
+			break;
+		if (strcmp (argv [i], "--call") == 0 || strcmp (argv [i], "-c") == 0) {
+			graphtype = GRAPH_CALL;
+		} else if (strcmp (argv [i], "--control-flow") == 0 || strcmp (argv [i], "-C") == 0) {
+			graphtype = GRAPH_CONTROL_FLOW;
+		} else if (strcmp (argv [i], "--interface") == 0 || strcmp (argv [i], "-i") == 0) {
+			graphtype = GRAPH_INTERFACE;
+		} else if (strcmp (argv [i], "--stats") == 0) {
+			graphtype = GRAPH_STATS;
+		} else if (strcmp (argv [i], "--size") == 0) {
+			graphtype = GRAPH_SIZE_STATS;
+		} else if (strcmp (argv [i], "--fullname") == 0 || strcmp (argv [i], "-f") == 0) {
+			include_namespace = 1;
+		} else if (strcmp (argv [i], "--neato") == 0 || strcmp (argv [i], "-n") == 0) {
+			callneato = 1;
+		} else if (strcmp (argv [i], "--verbose") == 0 || strcmp (argv [i], "-v") == 0) {
+			verbose++;
+		} else if (strcmp (argv [i], "--output") == 0 || strcmp (argv [i], "-o") == 0) {
+			if (i + 1 >= argc)
+				usage ();
+			outputfile = argv [++i];
+		} else if (strcmp (argv [i], "--depth") == 0 || strcmp (argv [i], "-d") == 0) {
+			if (i + 1 >= argc)
+				usage ();
+			max_depth = atoi (argv [++i]);
+		} else {
+			usage ();
+		}
+		
+	}
+	if (argc > i)
+		aname = argv [i];
+	if (argc > i + 1)
+		cname = argv [i + 1];
+	if (aname) {
+		mono_init_from_assembly (argv [0], aname);
+		assembly = mono_assembly_open (aname, NULL);
+	} else {
+		mono_init (argv [0]);
+		assembly = mono_image_get_assembly (mono_get_corlib ());
+	}
+	if (!cname && (graphtype == GRAPH_TYPES))
+		cname = "System.Object";
+
+	if (!assembly) {
+		g_print ("cannot open assembly %s\n", aname);
+		exit (1);
+	}
+
+	if (callneato) {
+		GString *command = g_string_new ("neato");
+		char *type = NULL;
+
+		if (outputfile) {
+			type = strrchr (outputfile, '.');
+			g_string_append_printf (command, " -o %s", outputfile);
+		}
+		if (type)
+			g_string_append_printf (command, " -T%s", type + 1);
+		output = popen (command->str, "w");
+		if (!output) {
+			g_print ("Cannot run neato: you may need to install the graphviz package.\n");
+			exit (1);
+		}
+	} else if (outputfile) {
+		output = fopen (outputfile, "w");
+		if (!output) {
+			g_print ("Cannot open file: %s\n", outputfile);
+			exit (1);
+		}
+	}
+	/* if it looks like a method name, we want a callgraph. */
+	if (cname && strchr (cname, ':') && graphtype == GRAPH_TYPES)
+		graphtype = GRAPH_CALL;
+
+	image = mono_assembly_get_image (assembly);
+	switch (graphtype) {
+	case GRAPH_TYPES:
+		type_graph (image, cname);
+		break;
+	case GRAPH_CALL:
+		method_graph (image, cname);
+		break;
+	case GRAPH_INTERFACE:
+		interface_graph (image, cname);
+		break;
+	case GRAPH_CONTROL_FLOW:
+		method_cfg (image, cname);
+		break;
+	case GRAPH_STATS:
+		stats (image, cname);
+		break;
+	case GRAPH_SIZE_STATS:
+		size_stats (image, cname);
+		break;
+	default:
+		g_error ("wrong graph type");
+	}
+	
+	if (callneato) {
+		if (verbose)
+			g_print ("waiting for neato.\n");
+		pclose (output);
+	} else if (outputfile)
+		fclose (output);
+	return 0;
+}