2005-01-31 Zoltan Varga <vargaz@freemail.hu>
[mono.git] / mono / metadata / debug-mono-symfile.c
index ee18b3b00190662e658b56d4dd3abe214509278c..05ed1c0bad97218a4d23474269db2ed3076c6db0 100644 (file)
@@ -1,7 +1,11 @@
 #include <config.h>
 #include <stdlib.h>
+#include <stdio.h>
+#include <errno.h>
 #include <string.h>
 #include <signal.h>
+#include <sys/param.h>
+#include <sys/stat.h>
 #include <mono/metadata/metadata.h>
 #include <mono/metadata/tabledefs.h>
 #include <mono/metadata/rawbuffer.h>
 #include <mono/metadata/appdomain.h>
 #include <mono/metadata/exception.h>
 #include <mono/metadata/debug-helpers.h>
+#include <mono/metadata/mono-debug.h>
 #include <mono/metadata/debug-mono-symfile.h>
+#include <mono/metadata/mono-endian.h>
+#include <mono/metadata/metadata-internals.h>
+#include <mono/metadata/class-internals.h>
+#include <mono/metadata/mono-debug-debugger.h>
 
 #include <fcntl.h>
 #include <unistd.h>
 
-#define RANGE_TABLE_CHUNK_SIZE 256
-#define TYPE_TABLE_CHUNK_SIZE  256
-
-struct MonoSymbolFilePriv
-{
-       int fd;
-       int error;
-       char *file_name;
-       char *source_file;
-       guint32 string_table_size;
-       guint32 string_offset_size;
-       MonoImage *image;
-       GHashTable *method_table;
-       GHashTable *method_hash;
-       MonoSymbolFileOffsetTable *offset_table;
-};
-
-typedef struct
-{
-       MonoMethod *method;
-       MonoDebugMethodInfo *minfo;
-       MonoSymbolFileMethodEntry *entry;
-       guint32 method_name_offset;
-       guint32 index;
-       gchar *name;
-} MonoSymbolFileMethodEntryPriv;
-
-static GHashTable *type_table;
-
-static int write_string_table (MonoSymbolFile *symfile);
-static int create_symfile (MonoSymbolFile *symfile, gboolean emit_warnings);
-static void close_symfile (MonoSymbolFile *symfile);
-static MonoDebugRangeInfo *allocate_range_entry (MonoSymbolFile *symfile);
-static MonoDebugTypeInfo *allocate_type_entry (MonoSymbolFile *symfile);
-static gpointer write_type (MonoType *type);
+#define RANGE_TABLE_CHUNK_SIZE         256
+#define CLASS_TABLE_CHUNK_SIZE         256
+#define TYPE_TABLE_PTR_CHUNK_SIZE      256
+#define TYPE_TABLE_CHUNK_SIZE          65536
 
 static void
 free_method_info (MonoDebugMethodInfo *minfo)
 {
-       g_free (minfo->jit);
        g_free (minfo);
 }
 
+static gchar *
+get_class_name (MonoClass *klass)
+{
+       MonoClass *nested_in = mono_class_get_nesting_type (klass);
+       const char *name_space;
+       if (nested_in) {
+               gchar *parent_name = get_class_name (nested_in);
+               gchar *name = g_strdup_printf ("%s.%s", parent_name, mono_class_get_name (klass));
+               g_free (parent_name);
+               return name;
+       }
+
+       name_space = mono_class_get_namespace (klass);
+       return g_strdup_printf ("%s%s%s", name_space,
+                               name_space [0] ? "." : "", mono_class_get_name (klass));
+}
+
 static int
-load_symfile (MonoSymbolFile *symfile)
+load_symfile (MonoDebugHandle *handle, MonoSymbolFile *symfile)
 {
-       MonoSymbolFilePriv *priv = symfile->_priv;
-       MonoSymbolFileMethodEntry *me;
        const char *ptr, *start;
+       gchar *guid;
        guint64 magic;
        long version;
-       int i;
 
        ptr = start = symfile->raw_contents;
+       if (!ptr)
+               return FALSE;
 
-       magic = *((guint64 *) ptr)++;
+       magic = read64(ptr);
+       ptr += sizeof(guint64);
        if (magic != MONO_SYMBOL_FILE_MAGIC) {
-               g_warning ("Symbol file %s has is not a mono symbol file", priv->file_name);
+               g_warning ("Symbol file %s is not a mono symbol file", symfile->filename);
                return FALSE;
        }
 
-       version = *((guint32 *) ptr)++;
+       version = read32(ptr);
+       ptr += sizeof(guint32);
        if (version != MONO_SYMBOL_FILE_VERSION) {
-               g_warning ("Symbol file %s has incorrect line number table version "
-                          "(expected %d, got %ld)", priv->file_name,
+               g_warning ("Symbol file %s has incorrect version "
+                          "(expected %d, got %ld)", symfile->filename,
                           MONO_SYMBOL_FILE_VERSION, version);
                return FALSE;
        }
 
-       priv->offset_table = (MonoSymbolFileOffsetTable *) ptr;
-
-       /*
-        * Read method table.
-        *
-        */
-
-       priv->method_table = g_hash_table_new_full (g_direct_hash, g_direct_equal, NULL,
-                                                   (GDestroyNotify) g_free);
-       priv->method_hash = g_hash_table_new_full (g_direct_hash, g_direct_equal, NULL,
-                                                  (GDestroyNotify) free_method_info);
-
-       ptr = symfile->raw_contents + priv->offset_table->method_table_offset;
-       me = (MonoSymbolFileMethodEntry *) ptr;
+       guid = mono_guid_to_string ((const guint8 *) ptr);
+       ptr += 16;
 
-       for (i = 0; i < priv->offset_table->method_count; i++, me++) {
-               MonoMethod *method = mono_get_method (priv->image, me->token, NULL);
-               MonoSymbolFileMethodEntryPriv *mep;
-               MonoDebugMethodInfo *minfo;
-
-               if (!method)
-                       continue;
-
-               if ((method->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) ||
-                   (method->iflags & METHOD_IMPL_ATTRIBUTE_RUNTIME) ||
-                   (method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL))
-                       g_assert_not_reached ();
-
-               if (!((MonoMethodNormal *) method)->header) {
-                       g_warning (G_STRLOC ": Internal error: method %s.%s doesn't have a header",
-                                  method->klass->name, method->name);
-                       continue;
-               }
-
-               minfo = g_new0 (MonoDebugMethodInfo, 1);
-               minfo->file_offset = ((const char *) me) - start;
-               minfo->method = method;
-               minfo->symfile = symfile;
-               minfo->num_il_offsets = me->num_line_numbers;
-               minfo->il_offsets = (MonoSymbolFileLineNumberEntry *)
-                       (symfile->raw_contents + me->line_number_table_offset);
-
-               mep = g_new0 (MonoSymbolFileMethodEntryPriv, 1);
-               mep->method = method;
-               mep->minfo = minfo;
-               mep->entry = me;
-               mep->index = i;
-
-               mep->method_name_offset = priv->string_table_size;
-               mep->name = g_strdup_printf ("%s%s.%s", method->klass->name_space,
-                                            method->klass->name, method->name);
-               priv->string_table_size += strlen (mep->name) + 1;
-
-               g_hash_table_insert (priv->method_table, method, mep);
-               g_hash_table_insert (priv->method_hash, method, minfo);
+       if (strcmp (handle->image->guid, guid)) {
+               g_warning ("Symbol file %s doesn't match image %s", symfile->filename,
+                          handle->image_file);
+               return FALSE;
        }
 
-       if (!write_string_table (symfile))
-               return FALSE;
+       symfile->offset_table = (MonoSymbolFileOffsetTable *) ptr;
+
+       symfile->method_hash = g_hash_table_new_full (
+               g_direct_hash, g_direct_equal, NULL, (GDestroyNotify) free_method_info);
 
        return TRUE;
 }
 
 MonoSymbolFile *
-mono_debug_open_mono_symbol_file (MonoImage *image, const char *filename, gboolean emit_warnings)
+mono_debug_open_mono_symbol_file (MonoDebugHandle *handle, gboolean create_symfile)
 {
        MonoSymbolFile *symfile;
-       MonoSymbolFilePriv *priv;
-       off_t file_size;
-       void *ptr;
-       int fd;
-
-       fd = open (filename, O_RDONLY);
-       if (fd == -1) {
-               if (emit_warnings)
-                       g_warning ("Can't open symbol file: %s", filename);
-               return NULL;
-       }
-
-       file_size = lseek (fd, 0, SEEK_END);
-       lseek (fd, 0, SEEK_SET);
+       FILE* f;
 
-       if (file_size == (off_t) -1) {
-               if (emit_warnings)
-                       g_warning ("Can't get size of symbol file: %s", filename);
-               return NULL;
-       }
+       mono_loader_lock ();
+       symfile = g_new0 (MonoSymbolFile, 1);
 
-       ptr = mono_raw_buffer_load (fd, FALSE, 0, file_size);
-       if (!ptr) {
-               if (emit_warnings)
-                       g_warning ("Can't read symbol file: %s", filename);
-               return NULL;
-       }
+       symfile->filename = g_strdup_printf ("%s.mdb", mono_image_get_filename (handle->image));
 
-       symfile = g_new0 (MonoSymbolFile, 1);
-       symfile->magic = MONO_SYMBOL_FILE_MAGIC;
-       symfile->version = MONO_SYMBOL_FILE_VERSION;
-       symfile->dynamic_magic = MONO_SYMBOL_FILE_DYNAMIC_MAGIC;
-       symfile->dynamic_version = MONO_SYMBOL_FILE_DYNAMIC_VERSION;
-       symfile->image_file = g_strdup (image->name);
-       symfile->symbol_file = g_strdup (filename);
-       symfile->raw_contents = ptr;
-       symfile->raw_contents_size = file_size;
-
-       symfile->_priv = priv = g_new0 (MonoSymbolFilePriv, 1);
-
-       priv->fd = fd;
-       priv->image = image;
-       priv->file_name = g_strdup (filename);
-
-       if (!load_symfile (symfile)) {
+       if ((f = fopen (symfile->filename, "rb")) > 0) {
+               struct stat stat_buf;
+                       
+               if (fstat (fileno (f), &stat_buf) < 0) {
+                       g_warning ("stat of %s failed: %s", symfile->filename,  g_strerror (errno));
+               } else {        
+                       symfile->raw_contents_size = stat_buf.st_size;
+                       symfile->raw_contents = mono_raw_buffer_load (fileno (f), FALSE, 0, stat_buf.st_size);
+               }
+               
+               fclose (f);
+       }
+       
+       if (load_symfile (handle, symfile)) {
+               mono_loader_unlock ();
+               return symfile;
+       } else if (!create_symfile) {
                mono_debug_close_mono_symbol_file (symfile);
+               mono_loader_unlock ();
                return NULL;
        }
 
+       mono_loader_unlock ();
        return symfile;
 }
 
-static void
-close_symfile (MonoSymbolFile *symfile)
-{
-       MonoSymbolFilePriv *priv = symfile->_priv;
-
-       if (symfile->raw_contents) {
-               mono_raw_buffer_free (symfile->raw_contents);
-               symfile->raw_contents = NULL;
-       }
-
-       if (priv->fd) {
-               close (priv->fd);
-               priv->fd = 0;
-       }
-
-       if (priv->method_table) {
-               g_hash_table_destroy (priv->method_table);
-               priv->method_table = NULL;
-       }
-
-       if (symfile->is_dynamic) {
-               unlink (priv->file_name);
-               priv->method_hash = NULL;
-       } else if (priv->method_hash) {
-               g_hash_table_destroy (priv->method_hash);
-               priv->method_hash = NULL;
-       }
-
-       if (symfile->image_file) {
-               g_free (symfile->image_file);
-               symfile->image_file = NULL;
-       }
-
-       if (priv->file_name) {
-               g_free (priv->file_name);
-               priv->file_name = NULL;
-       }
-
-       priv->error = FALSE;
-}
-
 void
 mono_debug_close_mono_symbol_file (MonoSymbolFile *symfile)
 {
        if (!symfile)
                return;
 
-       close_symfile (symfile);
+       mono_loader_lock ();
+       if (symfile->method_hash)
+               g_hash_table_destroy (symfile->method_hash);
 
-       g_free (symfile->_priv->source_file);
-       g_free (symfile->_priv);
-       g_free (symfile->image_file);
-       g_free (symfile->symbol_file);
+       if (symfile->raw_contents)
+               mono_raw_buffer_free ((gpointer) symfile->raw_contents);
+       
        g_free (symfile);
+       mono_loader_unlock ();
 }
 
 static int
-write_string (int fd, const char *string)
+read_leb128 (const char *ptr, const char **rptr)
 {
-       guint32 length = strlen (string);
+       int ret = 0;
+       int shift = 0;
+       char b;
 
-       if (write (fd, &length, sizeof (length)) < 0)
-               return FALSE;
+       do {
+               b = *ptr++;
+                               
+               ret = ret | ((b & 0x7f) << shift);
+               shift += 7;
+       } while ((b & 0x80) == 0x80);
 
-       if (write (fd, string, strlen (string)) < 0)
-               return FALSE;
+       if (rptr)
+               *rptr = ptr;
 
-       return TRUE;
+       return ret;
 }
 
 static gchar *
 read_string (const char *ptr)
 {
-       int len = *((guint32 *) ptr)++;
-
+       int len = read_leb128 (ptr, &ptr);
        return g_filename_from_utf8 (ptr, len, NULL, NULL, NULL);
 }
 
@@ -284,730 +181,131 @@ gchar *
 mono_debug_find_source_location (MonoSymbolFile *symfile, MonoMethod *method, guint32 offset,
                                 guint32 *line_number)
 {
-       MonoSymbolFilePriv *priv = symfile->_priv;
        MonoSymbolFileLineNumberEntry *lne;
-       MonoSymbolFileMethodEntryPriv *mep;
+       MonoDebugMethodInfo *minfo;
        gchar *source_file = NULL;
        const char *ptr;
        int i;
 
-       if (!priv->method_table || symfile->is_dynamic)
+       mono_loader_lock ();
+       if (!symfile->method_hash) {
+               mono_loader_unlock ();
                return NULL;
+       }
 
-       mep = g_hash_table_lookup (priv->method_table, method);
-       if (!mep)
+       minfo = g_hash_table_lookup (symfile->method_hash, method);
+       if (!minfo) {
+               mono_loader_unlock ();
                return NULL;
+       }
+
+       if (read32(&(minfo->entry->_source_index))) {
+               int offset = read32(&(symfile->offset_table->_source_table_offset)) +
+                       (read32(&(minfo->entry->_source_index)) - 1) * sizeof (MonoSymbolFileSourceEntry);
+               MonoSymbolFileSourceEntry *se = (MonoSymbolFileSourceEntry *) (symfile->raw_contents + offset);
 
-       if (mep->entry->source_file_offset)
-               source_file = read_string (symfile->raw_contents + mep->entry->source_file_offset);
+               source_file = read_string (symfile->raw_contents + read32(&(se->_name_offset)));
+       }
 
-       ptr = symfile->raw_contents + mep->entry->line_number_table_offset;
+       ptr = symfile->raw_contents + read32(&(minfo->entry->_line_number_table_offset));
 
        lne = (MonoSymbolFileLineNumberEntry *) ptr;
 
-       for (i = 0; i < mep->entry->num_line_numbers; i++, lne++) {
-               if (lne->offset < offset)
+       for (i = 0; i < read32(&(minfo->entry->_num_line_numbers)); i++, lne++) {
+               if (read32(&(lne->_offset)) < offset)
                        continue;
 
                if (line_number) {
-                       *line_number = lne->row;
+                       *line_number = read32(&(lne->_row));
+                       mono_loader_unlock ();
                        if (source_file)
                                return source_file;
                        else
                                return NULL;
                } else if (source_file) {
-                       gchar *retval = g_strdup_printf ("%s:%d", source_file, lne->row);
+                       gchar *retval = g_strdup_printf ("%s:%d", source_file, read32(&(lne->_row)));
                        g_free (source_file);
+                       mono_loader_unlock ();
                        return retval;
-               } else
-                       return g_strdup_printf ("%d", lne->row);
-       }
-
-       return NULL;
-}
-
-void
-mono_debug_symfile_add_method (MonoSymbolFile *symfile, MonoMethod *method)
-{
-       MonoSymbolFileMethodEntryPriv *mep;
-       MonoSymbolFileMethodAddress *address;
-       MonoDebugVarInfo *var_table;
-       MonoDebugRangeInfo *range;
-       guint32 size, num_variables, variable_size, variable_offset;
-       guint32 type_size, type_offset, *type_index_table;
-       gpointer *type_table;
-       guint8 *ptr;
-       int i;
-
-       mep = g_hash_table_lookup (symfile->_priv->method_table, method);
-       if (!mep)
-               return;
-
-       if (!mep->minfo) {
-               mep->minfo = g_hash_table_lookup (symfile->_priv->method_hash, mep->method);
-               if (!mep->minfo)
-                       return;
-       }
-
-       if (!mep->minfo->jit)
-               return;
-
-       symfile->generation++;
-
-       size = sizeof (MonoSymbolFileMethodAddress);
-
-       num_variables = mep->entry->num_parameters + mep->entry->num_locals;
-       if (mep->entry->this_type_index)
-               num_variables++;
-
-       variable_size = num_variables * sizeof (MonoDebugVarInfo);
-       variable_offset = size;
-       size += variable_size;
-
-       type_size = num_variables * sizeof (gpointer);
-       type_offset = size;
-       size += type_size;
-
-       address = g_malloc0 (size);
-       ptr = (guint8 *) address;
-
-       address->size = size;
-       address->start_address = mep->minfo->jit->code_start;
-       address->end_address = mep->minfo->jit->code_start + mep->minfo->jit->code_size;
-       address->method_start_address = address->start_address + mep->minfo->jit->prologue_end;
-       address->method_end_address = address->start_address + mep->minfo->jit->epilogue_begin;
-       address->variable_table_offset = variable_offset;
-       address->type_table_offset = type_offset;
-
-       if (mep->minfo->jit->line_numbers) {
-               address->num_line_numbers = mep->minfo->jit->line_numbers->len;
-               address->line_numbers = (MonoDebugLineNumberEntry *) mep->minfo->jit->line_numbers->data;
-               address->line_number_size = address->num_line_numbers * sizeof (MonoDebugLineNumberEntry);
-       }
-
-       range = allocate_range_entry (symfile);
-       range->file_offset = mep->minfo->file_offset;
-       range->start_address = address->start_address;
-       range->end_address = address->end_address;
-       range->dynamic_data = address;
-       range->dynamic_size = size;
-
-       var_table = (MonoDebugVarInfo *) (ptr + variable_offset);
-       type_table = (gpointer *) (ptr + type_offset);
-
-       type_index_table = (guint32 *)
-               (symfile->raw_contents + mep->entry->type_index_table_offset);
-
-       if (mep->entry->this_type_index) {
-               if (!mep->minfo->jit->this_var) {
-                       g_warning (G_STRLOC ": Method %s.%s doesn't have `this'.",
-                                  mep->method->klass->name, mep->method->name);
-                       var_table++;
                } else {
-                       *var_table++ = *mep->minfo->jit->this_var;
-                       *type_table++ = write_type (&method->klass->this_arg);
-               }
-       }
-
-       if (mep->minfo->jit->num_params != mep->entry->num_parameters) {
-               g_warning (G_STRLOC ": Method %s.%s has %d parameters, but symbol file claims it has %d.",
-                          mep->method->klass->name, mep->method->name, mep->minfo->jit->num_params,
-                          mep->entry->num_parameters);
-               var_table += mep->entry->num_parameters;
-       } else {
-               for (i = 0; i < mep->minfo->jit->num_params; i++) {
-                       *var_table++ = mep->minfo->jit->params [i];
-                       *type_table++ = write_type (method->signature->params [i]);
+                       gchar* retval = g_strdup_printf ("%d", read32(&(lne->_row)));
+                       mono_loader_unlock ();
+                       return retval;
                }
        }
 
-       if (mep->minfo->jit->num_locals != mep->entry->num_locals) {
-#if 0
-               g_warning (G_STRLOC ": Method %s.%s has %d locals, but symbol file claims it has %d.",
-                          mep->method->klass->name, mep->method->name, mep->minfo->jit->num_locals,
-                          mep->entry->num_locals);
-#endif
-               var_table += mep->entry->num_locals;
-       } else
-               for (i = 0; i < mep->minfo->jit->num_locals; i++)
-                       *var_table++ = mep->minfo->jit->locals [i];
-}
-
-void
-mono_debug_symfile_add_type (MonoSymbolFile *symfile, MonoClass *klass)
-{
-       MonoDebugTypeInfo *info = allocate_type_entry (symfile);
-
-       info->klass = klass;
-       if (klass->rank) {
-               info->token = klass->element_class->type_token;
-               info->rank = klass->rank;
-       } else
-               info->token = klass->type_token;
-       info->type_info = write_type (&klass->this_arg);
-}
-
-static void
-free_method_entry (MonoSymbolFileMethodEntryPriv *mep)
-{
-       g_free (mep->name);
-       g_free (mep->entry);
-       g_free (mep);
-}
-
-static void
-create_method (MonoSymbolFile *symfile, guint32 token, MonoMethod *method)
-{
-       MonoSymbolFileMethodEntryPriv *mep;
-       MonoDebugMethodInfo *minfo;
-
-       g_assert (method->klass->image == symfile->_priv->image);
-
-       mep = g_new0 (MonoSymbolFileMethodEntryPriv, 1);
-       mep->entry = g_new0 (MonoSymbolFileMethodEntry, 1);
-       mep->entry->token = token;
-       mep->entry->source_file_offset = symfile->_priv->offset_table->source_table_offset;
-
-       mep->method_name_offset = symfile->_priv->string_table_size;
-       mep->name = g_strdup_printf ("%s%s.%s", method->klass->name_space,
-                                    method->klass->name, method->name);
-       symfile->_priv->string_table_size += strlen (mep->name) + 1;
-
-       minfo = g_hash_table_lookup (symfile->_priv->method_hash, method);
-       g_assert (minfo && (minfo->method == method));
-       minfo->symfile = symfile;
-
-       mep->minfo = minfo;
-       mep->method = method;
-
-       symfile->_priv->offset_table->method_count++;
-
-       g_hash_table_insert (symfile->_priv->method_table, method, mep);
+       mono_loader_unlock ();
+       return NULL;
 }
 
-static void
-write_method (gpointer key, gpointer value, gpointer user_data)
+gint32
+_mono_debug_address_from_il_offset (MonoDebugMethodJitInfo *jit, guint32 il_offset)
 {
-       MonoSymbolFile *symfile = (MonoSymbolFile *) user_data;
-       MonoSymbolFileMethodEntryPriv *mep = (MonoSymbolFileMethodEntryPriv *) value;
+       int i;
 
-       if (symfile->_priv->error)
-               return;
+       if (!jit || !jit->line_numbers)
+               return -1;
 
-       mep->minfo->file_offset = lseek (symfile->_priv->fd, 0, SEEK_CUR);
+       for (i = jit->line_numbers->len - 1; i >= 0; i--) {
+               MonoDebugLineNumberEntry lne = g_array_index (
+                       jit->line_numbers, MonoDebugLineNumberEntry, i);
 
-       if (write (symfile->_priv->fd, mep->entry, sizeof (MonoSymbolFileMethodEntry)) < 0) {
-               symfile->_priv->error = TRUE;
-               return;
+               if (lne.il_offset <= il_offset)
+                       return lne.native_offset;
        }
-}
-
-static void
-create_methods (MonoSymbolFile *symfile)
-{
-       MonoImage *image = symfile->_priv->image;
-       MonoTableInfo *table = &image->tables [MONO_TABLE_METHOD];
-       int idx;
-
-       for (idx = 1; idx <= table->rows; idx++) {
-               guint32 token = mono_metadata_make_token (MONO_TABLE_METHOD, idx);
-               MonoMethod *method = mono_get_method (image, token, NULL);
-
-               if ((method->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) ||
-                   (method->iflags & METHOD_IMPL_ATTRIBUTE_RUNTIME) ||
-                   (method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL))
-                       continue;
-
-               if (method->wrapper_type != MONO_WRAPPER_NONE)
-                       continue;
 
-               if ((method->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) ||
-                   (method->iflags & METHOD_IMPL_ATTRIBUTE_RUNTIME) ||
-                   (method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL))
-                       g_assert_not_reached ();
-
-               if (!((MonoMethodNormal *) method)->header) {
-                       g_warning (G_STRLOC ": Internal error: method %s.%s doesn't have a header",
-                                  method->klass->name, method->name);
-                       continue;
-               }
-
-               create_method (symfile, token, method);
-       }
+       return -1;
 }
 
 static int
-create_symfile (MonoSymbolFile *symfile, gboolean emit_warnings)
+compare_method (const void *key, const void *object)
 {
-       MonoSymbolFilePriv *priv = symfile->_priv;
-       char *ptr;
-       guint64 magic;
-       long version;
-       off_t offset;
+       guint32 token = GPOINTER_TO_UINT (key);
+       MonoSymbolFileMethodIndexEntry *me = (MonoSymbolFileMethodIndexEntry*)object;
 
-       priv->fd = g_file_open_tmp (NULL, &priv->file_name, NULL);
-       if (priv->fd == -1) {
-               if (emit_warnings)
-                       g_warning ("Can't create symbol file");
-               return FALSE;
-       }
-
-       symfile->symbol_file = g_strdup (priv->file_name);
-
-       magic = MONO_SYMBOL_FILE_MAGIC;
-       if (write (priv->fd, &magic, sizeof (magic)) < 0)
-               return FALSE;
-
-       version = MONO_SYMBOL_FILE_VERSION;
-       if (write (priv->fd, &version, sizeof (version)) < 0)
-               return FALSE;
-
-       offset = lseek (priv->fd, 0, SEEK_CUR);
-
-       priv->offset_table = g_new0 (MonoSymbolFileOffsetTable, 1);
-       if (write (priv->fd, priv->offset_table, sizeof (MonoSymbolFileOffsetTable)) < 0)
-               return FALSE;
-
-       //
-       // Write source file table.
-       //
-       if (priv->source_file) {
-               priv->offset_table->source_table_offset = lseek (priv->fd, 0, SEEK_CUR);
-               if (!write_string (priv->fd, priv->source_file))
-                       return FALSE;
-               priv->offset_table->source_table_size = lseek (priv->fd, 0, SEEK_CUR) -
-                       priv->offset_table->source_table_offset;
-       }
-
-       //
-       // Create method table.
-       //
-
-       priv->method_table = g_hash_table_new_full (g_direct_hash, g_direct_equal, NULL,
-                                                   (GDestroyNotify) free_method_entry);
-
-       create_methods (symfile);
-
-       //
-       // Write method table.
-       //
-
-       priv->offset_table->method_table_offset = lseek (priv->fd, 0, SEEK_CUR);
-
-       g_hash_table_foreach (priv->method_table, write_method, symfile);
-       if (priv->error)
-               return FALSE;
-
-       priv->offset_table->method_table_size = lseek (priv->fd, 0, SEEK_CUR) -
-               priv->offset_table->method_table_offset;
-
-       //
-       // Write offset table.
-       //
-
-       symfile->raw_contents_size = lseek (priv->fd, 0, SEEK_CUR);
-
-       lseek (priv->fd, offset, SEEK_SET);
-       if (write (priv->fd, priv->offset_table, sizeof (MonoSymbolFileOffsetTable)) < 0)
-               return FALSE;
-
-       lseek (priv->fd, symfile->raw_contents_size, SEEK_SET);
-
-       ptr = mono_raw_buffer_load (priv->fd, TRUE, 0, symfile->raw_contents_size);
-       if (!ptr)
-               return FALSE;
-
-       symfile->raw_contents = ptr;
-
-       if (!write_string_table (symfile))
-               return FALSE;
-
-       return TRUE;
-}
-
-MonoSymbolFile *
-mono_debug_create_mono_symbol_file (MonoImage *image, GHashTable *method_hash)
-{
-       MonoSymbolFile *symfile;
-
-       symfile = g_new0 (MonoSymbolFile, 1);
-       symfile->magic = MONO_SYMBOL_FILE_MAGIC;
-       symfile->version = MONO_SYMBOL_FILE_VERSION;
-       symfile->dynamic_magic = MONO_SYMBOL_FILE_DYNAMIC_MAGIC;
-       symfile->dynamic_version = MONO_SYMBOL_FILE_DYNAMIC_VERSION;
-       symfile->is_dynamic = TRUE;
-       symfile->image_file = g_strdup (image->name);
-
-       symfile->_priv = g_new0 (MonoSymbolFilePriv, 1);
-       symfile->_priv->image = image;
-       symfile->_priv->method_hash = method_hash;
-
-       if (!create_symfile (symfile, TRUE)) {
-               mono_debug_close_mono_symbol_file (symfile);
-               return NULL;
-       }
-
-       return symfile;
+       return token - read32(&(me->_token));
 }
 
 MonoDebugMethodInfo *
-mono_debug_find_method (MonoSymbolFile *symfile, MonoMethod *method)
-{
-       return g_hash_table_lookup (symfile->_priv->method_hash, method);
-}
-
-static void
-write_method_name (gpointer key, gpointer value, gpointer user_data)
-{
-       MonoSymbolFile *symfile = (MonoSymbolFile *) user_data;
-       MonoSymbolFileMethodEntryPriv *mep = (MonoSymbolFileMethodEntryPriv *) value;
-       MonoSymbolFilePriv *priv = symfile->_priv;
-       guint8 *offset_ptr, *string_ptr;
-       guint32 offset;
-
-       offset = mep->method_name_offset + priv->string_offset_size;
-
-       offset_ptr = symfile->string_table + mep->index * 4;
-       string_ptr = symfile->string_table + offset;
-
-       *((guint32 *) offset_ptr) = offset;
-       strcpy (string_ptr, mep->name);
-}
-
-static int
-write_string_table (MonoSymbolFile *symfile)
+mono_debug_find_method (MonoDebugHandle *handle, MonoMethod *method)
 {
-       MonoSymbolFilePriv *priv = symfile->_priv;
-
-       priv->string_offset_size = priv->offset_table->method_count * 4;
-
-       symfile->string_table_size = priv->string_table_size + priv->string_offset_size;
-       symfile->string_table = g_malloc0 (symfile->string_table_size);
-
-       g_hash_table_foreach (symfile->_priv->method_table, write_method_name, symfile);
-       return TRUE;
-}
-
-MonoReflectionMethod *
-ves_icall_MonoDebugger_GetMethod (MonoReflectionAssembly *assembly, guint32 token)
-{
-       MonoMethod *method;
-
-       method = mono_get_method (assembly->assembly->image, token, NULL);
-
-       return mono_method_get_object (mono_domain_get (), method, NULL);
-}
-
-MonoReflectionType *
-ves_icall_MonoDebugger_GetType (MonoReflectionAssembly *assembly, guint32 token)
-{
-       MonoClass *klass;
+       MonoSymbolFileMethodEntry *me;
+       MonoSymbolFileMethodIndexEntry *first_ie, *ie;
+       MonoDebugMethodInfo *minfo;
+       MonoSymbolFile *symfile = handle->symfile;
 
-       klass = g_hash_table_lookup (assembly->assembly->image->class_cache, GUINT_TO_POINTER (token));
-       if (!klass) {
-               g_message (G_STRLOC ": %x", token);
+       if (!symfile->method_hash)
                return NULL;
-       }
-
-       return mono_type_get_object (mono_domain_get (), &klass->byval_arg);
-}
-
-MonoReflectionType *
-ves_icall_MonoDebugger_GetLocalTypeFromSignature (MonoReflectionAssembly *assembly, MonoArray *signature)
-{
-       MonoDomain *domain; 
-       MonoImage *image;
-       MonoType *type;
-       const char *ptr;
-       int len = 0;
-
-       MONO_CHECK_ARG_NULL (assembly);
-       MONO_CHECK_ARG_NULL (signature);
-
-       domain = mono_domain_get();
-       image = assembly->assembly->image;
-
-       ptr = mono_array_addr (signature, char, 0);
-       g_assert (*ptr++ == 0x07);
-       len = mono_metadata_decode_value (ptr, &ptr);
-       g_assert (len == 1);
-
-       type = mono_metadata_parse_type (image, MONO_PARSE_LOCAL, 0, ptr, &ptr);
-
-       return mono_type_get_object (domain, type);
-}
-
-static MonoDebugRangeInfo *
-allocate_range_entry (MonoSymbolFile *symfile)
-{
-       MonoDebugRangeInfo *retval;
-       guint32 size, chunks;
-
-       symfile->range_entry_size = sizeof (MonoDebugRangeInfo);
-
-       if (!symfile->range_table) {
-               size = sizeof (MonoDebugRangeInfo) * RANGE_TABLE_CHUNK_SIZE;
-               symfile->range_table = g_malloc0 (size);
-               symfile->num_range_entries = 1;
-               return symfile->range_table;
-       }
-
-       if (!((symfile->num_range_entries + 1) % RANGE_TABLE_CHUNK_SIZE)) {
-               chunks = (symfile->num_range_entries + 1) / RANGE_TABLE_CHUNK_SIZE;
-               size = sizeof (MonoDebugRangeInfo) * RANGE_TABLE_CHUNK_SIZE * (chunks + 1);
-
-               symfile->range_table = g_realloc (symfile->range_table, size);
-       }
-
-       retval = symfile->range_table + symfile->num_range_entries;
-       symfile->num_range_entries++;
-       return retval;
-}
-
-static MonoDebugTypeInfo *
-allocate_type_entry (MonoSymbolFile *symfile)
-{
-       MonoDebugTypeInfo *retval;
-       guint32 size, chunks;
-
-       symfile->type_entry_size = sizeof (MonoDebugTypeInfo);
 
-       if (!symfile->type_table) {
-               size = sizeof (MonoDebugTypeInfo) * TYPE_TABLE_CHUNK_SIZE;
-               symfile->type_table = g_malloc0 (size);
-               symfile->num_type_entries = 1;
-               return symfile->type_table;
-       }
-
-       if (!((symfile->num_type_entries + 1) % TYPE_TABLE_CHUNK_SIZE)) {
-               chunks = (symfile->num_type_entries + 1) / TYPE_TABLE_CHUNK_SIZE;
-               size = sizeof (MonoDebugTypeInfo) * TYPE_TABLE_CHUNK_SIZE * (chunks + 1);
-
-               symfile->type_table = g_realloc (symfile->type_table, size);
-       }
-
-       retval = symfile->type_table + symfile->num_type_entries;
-       symfile->num_type_entries++;
-       return retval;
-}
-
-static gpointer
-write_simple_type (MonoType *type)
-{
-       guint8 buffer [BUFSIZ], *ptr = buffer, *retval;
-       guint32 size;
-
-       if (!type_table)
-               type_table = g_hash_table_new (g_direct_hash, g_direct_equal);
-
-       retval = g_hash_table_lookup (type_table, type);
-       if (retval)
-               return retval;
-
-       switch (type->type) {
-       case MONO_TYPE_BOOLEAN:
-       case MONO_TYPE_I1:
-       case MONO_TYPE_U1:
-               *((int *) ptr)++ = 1;
-               break;
-
-       case MONO_TYPE_CHAR:
-       case MONO_TYPE_I2:
-       case MONO_TYPE_U2:
-               *((int *) ptr)++ = 2;
-               break;
-
-       case MONO_TYPE_I4:
-       case MONO_TYPE_U4:
-       case MONO_TYPE_R4:
-               *((int *) ptr)++ = 4;
-               break;
-
-       case MONO_TYPE_I8:
-       case MONO_TYPE_U8:
-       case MONO_TYPE_R8:
-               *((int *) ptr)++ = 8;
-               break;
-
-       case MONO_TYPE_STRING: {
-               MonoString string;
-
-               *((int *) ptr)++ = -8;
-               *((guint32 *) ptr)++ = sizeof (MonoString);
-               *ptr++ = 1;
-               *ptr++ = (guint8*)&string.length - (guint8*)&string;
-               *ptr++ = sizeof (string.length);
-               *ptr++ = (guint8*)&string.chars - (guint8*)&string;
-               break;
-       }
-
-       default:
+       if (handle->image != mono_class_get_image (mono_method_get_class (method)))
                return NULL;
-       }
-
-       size = ptr - buffer;
-
-       retval = g_malloc0 (size + 4);
-       memcpy (retval + 4, buffer, size);
-       *((int *) retval) = size;
 
-       g_hash_table_insert (type_table, type, retval);
-
-       return retval;
-}
-
-static gpointer
-write_type (MonoType *type)
-{
-       guint8 buffer [BUFSIZ], *ptr = buffer, *retval;
-       int num_fields = 0;
-       guint32 size;
-
-       if (!type_table)
-               type_table = g_hash_table_new (g_direct_hash, g_direct_equal);
-
-       retval = g_hash_table_lookup (type_table, type);
-       if (retval)
-               return retval;
-
-       retval = write_simple_type (type);
-       if (retval)
-               return retval;
-
-       switch (type->type) {
-       case MONO_TYPE_SZARRAY:
-               size = 8 + sizeof (int) + sizeof (gpointer);
-               break;
-
-       case MONO_TYPE_ARRAY:
-               size = 15 + sizeof (int) + sizeof (gpointer);
-               break;
-
-       case MONO_TYPE_VALUETYPE:
-       case MONO_TYPE_CLASS: {
-               MonoClass *klass = type->data.klass;
-               int i;
-
-               mono_class_init (klass);
-               if (klass->enumtype) {
-                       size = 5 + sizeof (int) + sizeof (gpointer);
-                       break;
-               }
-
-               for (i = 0; i < klass->field.count; i++)
-                       if (!(klass->fields [i].type->attrs & FIELD_ATTRIBUTE_STATIC))
-                               ++num_fields;
-
-               size = 14 + sizeof (int) + num_fields * (4 + sizeof (gpointer));
-
-               if (type->type == MONO_TYPE_CLASS)
-                       size += sizeof (gpointer);
-               break;
-       }
-
-       case MONO_TYPE_OBJECT:
-               size = 5 + sizeof (int);
-               break;
-
-       default:
-               size = sizeof (int);
-               break;
-       }
+       mono_loader_lock ();
+       first_ie = (MonoSymbolFileMethodIndexEntry *)
+               (symfile->raw_contents + read32(&(symfile->offset_table->_method_table_offset)));
 
-       retval = g_malloc0 (size + 4);
-       memcpy (retval + 4, buffer, size);
-       *((int *) retval) = size;
+       ie = bsearch (GUINT_TO_POINTER (mono_method_get_token (method)), first_ie,
+                                  read32(&(symfile->offset_table->_method_count)),
+                                  sizeof (MonoSymbolFileMethodIndexEntry), compare_method);
 
-       g_hash_table_insert (type_table, type, retval);
-
-       ptr = retval + 4;
-
-       switch (type->type) {
-       case MONO_TYPE_SZARRAY: {
-               MonoArray array;
-
-               *((int *) ptr)++ = -8 - sizeof (gpointer);
-               *((guint32 *) ptr)++ = sizeof (MonoArray);
-               *ptr++ = 2;
-               *ptr++ = (guint8*)&array.max_length - (guint8*)&array;
-               *ptr++ = sizeof (array.max_length);
-               *ptr++ = (guint8*)&array.vector - (guint8*)&array;
-               *((gpointer *) ptr)++ = write_type (type->data.type);
-               break;
-       }
-
-       case MONO_TYPE_ARRAY: {
-               MonoArray array;
-               MonoArrayBounds bounds;
-
-               *((int *) ptr)++ = -15 - sizeof (gpointer);
-               *((guint32 *) ptr)++ = sizeof (MonoArray);
-               *ptr++ = 3;
-               *ptr++ = (guint8*)&array.max_length - (guint8*)&array;
-               *ptr++ = sizeof (array.max_length);
-               *ptr++ = (guint8*)&array.vector - (guint8*)&array;
-               *ptr++ = type->data.array->rank;
-               *ptr++ = (guint8*)&array.bounds - (guint8*)&array;
-               *ptr++ = sizeof (MonoArrayBounds);
-               *ptr++ = (guint8*)&bounds.lower_bound - (guint8*)&bounds;
-               *ptr++ = sizeof (bounds.lower_bound);
-               *ptr++ = (guint8*)&bounds.length - (guint8*)&bounds;
-               *ptr++ = sizeof (bounds.length);
-               *((gpointer *) ptr)++ = write_type (type->data.array->type);
-               break;
-       }
-
-       case MONO_TYPE_VALUETYPE:
-       case MONO_TYPE_CLASS: {
-               MonoClass *klass = type->data.klass;
-               int base_offset = type->type == MONO_TYPE_CLASS ? 0 : - sizeof (MonoObject);
-               int i;
-
-               mono_class_init (klass);
-               if (klass->enumtype) {
-                       *((int *) ptr)++ = -5 - sizeof (gpointer);
-                       *((guint32 *) ptr)++ = sizeof (MonoObject);
-                       *ptr++ = 4;
-                       *((gpointer *) ptr)++ = write_type (klass->enum_basetype);
-                       break;
-               }
-
-               *((int *) ptr)++ = -14 - num_fields * (4 + sizeof (gpointer));
-               *((guint32 *) ptr)++ = klass->instance_size + base_offset;
-               *ptr++ = type->type == MONO_TYPE_CLASS ? 6 : 5;
-               *ptr++ = type->type == MONO_TYPE_CLASS;
-               *((guint32 *) ptr)++ = num_fields;
-               *((guint32 *) ptr)++ = num_fields * (4 + sizeof (gpointer));
-               for (i = 0; i < klass->field.count; i++) {
-                       if (klass->fields [i].type->attrs & FIELD_ATTRIBUTE_STATIC)
-                               continue;
-
-                       *((guint32 *) ptr)++ = klass->fields [i].offset + base_offset;
-                       *((gpointer *) ptr)++ = write_type (klass->fields [i].type);
-               }
-
-               if (type->type == MONO_TYPE_CLASS) {
-                       if (klass->parent)
-                               *((gpointer *) ptr)++ = write_type (&klass->parent->this_arg);
-                       else
-                               *((gpointer *) ptr)++ = NULL;
-               }
-
-               break;
+       if (!ie) {
+               mono_loader_unlock ();
+               return NULL;
        }
 
-       case MONO_TYPE_OBJECT:
-               *((int *) ptr)++ = -5;
-               *((guint32 *) ptr)++ = sizeof (MonoObject);
-               *ptr++ = 7;
-               break;
+       me = (MonoSymbolFileMethodEntry *) (symfile->raw_contents + read32(&(ie->_file_offset)));
 
-       default:
-               g_message (G_STRLOC ": %p - %x,%x,%x", type, type->attrs, type->type, type->byref);
+       minfo = g_new0 (MonoDebugMethodInfo, 1);
+       minfo->index = (ie - first_ie) + 1;
+       minfo->method = method;
+       minfo->handle = handle;
+       minfo->num_il_offsets = read32(&(me->_num_line_numbers));
+       minfo->il_offsets = (MonoSymbolFileLineNumberEntry *)
+               (symfile->raw_contents + read32(&(me->_line_number_table_offset)));
+       minfo->entry = me;
 
-               *((int *) ptr)++ = -1;
-               break;
-       }
+       g_hash_table_insert (symfile->method_hash, method, minfo);
 
-       return retval;
+       mono_loader_unlock ();
+       return minfo;
 }