Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

samples/size/Makefile

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+
+all: objectinspector.dll libmono-profiler-size.so sample.exe
+	LD_LIBRARY_PATH=. mono --profile=size sample.exe
+
+sample.exe: objectinspector.dll sample.cs
+	mcs -r:objectinspector.dll sample.cs 
+
+objectinspector.dll: objectinspector.cs
+	mcs -target:library objectinspector.cs
+
+libmono-profiler-size.so: size.c
+	gcc -Wall -g -shared -o libmono-profiler-size.so size.c `pkg-config --cflags --libs mono`

samples/size/README

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+
+* Size sample
+
+	This sample provides a new internal call that can be used to
+	obtain the size of an object and all of the referenced objects
+	that this object holds.
+
+	This is exposed in the method:
+
+	int Mono.ObjectServices.ObjectInspector.GetMemoryUsage (object x)
+
+	Available in the objectinspector.dll file;   To use this, you
+	must run Mono with the --profile=size argument (and have the
+	libmono-profile-size.so module in your path). 
+	
+* Inner Details.
+
+	This implementation used a profiler hook at jit-end to install
+	a new internal call, and exposes a small DLL
+	(objectinspector.dll).
+
+	There is no need to use the profiler, the method body that
+	does the object size computation can be copy/pasted elsewhere,
+	particularly on embedded uses of Mono.
+	
+
+	
+

samples/size/objectinspector.cs

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+
+//
+// Copyright (C) 2004 Novell, Inc (http://www.novell.com)
+//
+// Permission is hereby granted, free of charge, to any person obtaining
+// a copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to
+// permit persons to whom the Software is furnished to do so, subject to
+// the following conditions:
+// 
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//
+using System.Runtime.CompilerServices;
+using System;
+using System.Security;
+using System.Reflection;
+using System.Threading;
+
+namespace Mono.ObjectServices {
+
+	public class ObjectInspector {
+    
+		[MethodImplAttribute(MethodImplOptions.InternalCall)]
+		public extern static int GetMemoryUsage (object x);
+	}
+}

samples/size/sample.cs

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+using System;
+using Mono.ObjectServices;
+
+class Demo {
+
+        int a;
+
+	static void Main ()
+	{
+		Demo d = new Demo ();
+
+		prints ("d", d);
+		prints ("dd", new DD ());
+		prints ("short str", "short");
+		prints ("long str", "this is a longer string which we want to measure the size of");
+
+		object[] obj_array = new object [100];
+
+		prints ("obj array", obj_array);
+
+		for (int i = 0; i < 100; i++)
+			obj_array [i] = new Demo ();
+
+		prints ("obj array w/ demos", obj_array);
+	}
+
+	static void prints (string s, object x)
+	{
+		Console.WriteLine ("size of " + s + ":" + ObjectInspector.GetMemoryUsage (x));
+	}
+}
+
+class DD {
+    Demo d = new Demo ();
+    object [] o = new object [10];
+    char [] ch = new char [10];
+    int junk;   
+ 
+    public DD ()
+    {
+	    o [0] = new Demo ();
+	    o [5] = new Demo ();
+    }
+}

samples/size/size.c

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+#include <glib.h>
+#include <mono/jit/jit.h>
+#include <mono/metadata/environment.h>
+#include <mono/metadata/profiler.h>
+#include <mono/metadata/tokentype.h>
+#include <mono/metadata/debug-helpers.h>
+#include <mono/metadata/assembly.h>
+#include <string.h>
+
+#define FIELD_ATTRIBUTE_STATIC 0x10
+#define FIELD_ATTRIBUTE_HAS_FIELD_RVA 0x100
+
+static int memory_usage (MonoObject *obj, GHashTable *visited);
+
+static int
+memory_usage_array (MonoArray *array, GHashTable *visited)
+{
+        int total = 0;
+        MonoClass *array_class = mono_object_get_class ((MonoObject *) array);
+        MonoClass *element_class = mono_class_get_element_class (array_class);
+        MonoType *element_type = mono_class_get_type (element_class);
+
+        if (MONO_TYPE_IS_REFERENCE (element_type)) {
+                int i;
+
+                for (i = 0; i < mono_array_length (array); i++) {
+                        MonoObject *element = mono_array_get (array, gpointer, i);
+
+                        if (element != NULL)
+                                total += memory_usage (element, visited);
+                }
+        }
+
+        return total;
+}
+
+static int
+memory_usage (MonoObject *obj, GHashTable *visited)
+{
+        int total = 0;
+        MonoClass *klass;
+        MonoType *type;
+        gpointer iter = NULL;
+        MonoClassField *field;
+
+        if (g_hash_table_lookup (visited, obj))
+                return 0;
+
+        g_hash_table_insert (visited, obj, obj);
+
+        klass = mono_object_get_class (obj);
+        type = mono_class_get_type (klass);
+
+        /* This is an array, so drill down into it */
+        if (type->type == MONO_TYPE_SZARRAY)
+                total += memory_usage_array ((MonoArray *) obj, visited);
+
+        while ((field = mono_class_get_fields (klass, &iter)) != NULL) {
+                MonoType *ftype = mono_field_get_type (field);
+                gpointer value;
+
+                if ((ftype->attrs & (FIELD_ATTRIBUTE_STATIC | FIELD_ATTRIBUTE_HAS_FIELD_RVA)) != 0)
+                        continue;
+
+                /* FIXME: There are probably other types we need to drill down into */
+                switch (ftype->type) {
+
+                case MONO_TYPE_CLASS:
+                case MONO_TYPE_OBJECT:
+                        mono_field_get_value (obj, field, &value);
+
+                        if (value != NULL)
+                                total += memory_usage ((MonoObject *) value, visited);
+
+                        break;
+
+		case MONO_TYPE_STRING:
+			mono_field_get_value (obj, field, &value);
+			if (value != NULL)
+				total += mono_object_get_size ((MonoObject *) value);
+			break;
+
+                case MONO_TYPE_SZARRAY:
+                        mono_field_get_value (obj, field, &value);
+
+                        if (value != NULL) {
+                                total += memory_usage_array ((MonoArray *) value, visited);
+                                total += mono_object_get_size ((MonoObject *) value);
+                        }
+
+                        break;
+
+                default:
+                        /* printf ("Got type 0x%x\n", ftype->type); */
+                        /* ignore, this will be included in mono_object_get_size () */
+                        break;
+                }
+        }
+
+        total += mono_object_get_size (obj);
+
+        return total;
+}
+
+/*
+ * Only returns data for instances, not for static fields, those might
+ * be larger, or hold larger structures
+ */
+static int
+GetMemoryUsage (MonoObject *this)
+{
+	GHashTable *visited = g_hash_table_new (NULL, NULL);
+	int n;
+	
+	n = memory_usage (this, visited);
+
+	g_hash_table_destroy (visited);
+	
+	return n;
+}
+
+static int installed = 0;
+
+void install_icall (MonoProfiler *prof, MonoMethod *method, MonoJitInfo* jinfo, int result)
+{
+	if (installed)
+		return;
+
+	mono_add_internal_call ("Mono.ObjectServices.ObjectInspector::GetMemoryUsage", GetMemoryUsage);
+	installed = 1;
+}
+
+void
+mono_profiler_startup (const char *desc)
+{
+	mono_profiler_install_jit_end (install_icall);
+	mono_profiler_set_events (MONO_PROFILE_JIT_COMPILATION);
+}