+/*
+ * Copyright (c) 2008 Apple Inc. All Rights Reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_LICENSE_HEADER_END@
+ */
+
+#import <auto_zone.h>
+#import <objc/objc.h>
+#import <objc/runtime.h>
+#import "objc-auto-dump.h"
+#import "objc-private.h"
+#import <strings.h>
+
+/*
+ * Utilities
+ */
+
+static char myType() {
+ char type = 0;
+ if (sizeof(void *) == 8) type |= SixtyFour;
+#if __LITTLE_ENDIAN__
+ type |= Little;
+#endif
+ return type;
+}
+
+/*
+ * Sigh, a mutable set.
+ */
+
+typedef struct {
+ long *items;
+ long count;
+ long capacity;
+} pointer_set_t;
+
+static pointer_set_t *new_pointer_set() {
+ pointer_set_t *result = malloc_zone_malloc(_objc_internal_zone(), sizeof(pointer_set_t));
+ result->items = calloc(64, sizeof(long));
+ result->count = 0;
+ result->capacity = 63; // last valid ptr, also mask
+ return result;
+}
+
+static void pointer_set_grow(pointer_set_t *set);
+
+static void pointer_set_add(pointer_set_t *set, long ptr) {
+ long hash = ptr & set->capacity;
+ while (1) {
+ if (!set->items[hash]) {
+ set->items[hash] = ptr;
+ ++set->count;
+ if (set->count*3 > set->capacity*2)
+ pointer_set_grow(set);
+ return;
+ }
+ if (set->items[hash] == ptr) return;
+ hash = (hash + 1) & set->capacity;
+ }
+}
+
+static void pointer_set_grow(pointer_set_t *set) {
+ long oldCapacity = set->capacity;
+ long *oldItems = set->items;
+ long i;
+ set->count = 0;
+ set->capacity = 2*(oldCapacity+1)-1;
+ set->items = malloc_zone_calloc(_objc_internal_zone(), 2*(oldCapacity+1), sizeof(long));
+ for (i = 0; i < oldCapacity; ++i)
+ if (oldItems[i]) pointer_set_add(set, oldItems[i]);
+ free(oldItems);
+}
+
+static void pointer_set_iterate(pointer_set_t *set, void (^block)(long item)) {
+ long i;
+ for (i = 0; i < set->capacity; ++i)
+ if (set->items[i]) block(set->items[i]);
+}
+
+static void pointer_set_dispose(pointer_set_t *set) {
+ free(set->items);
+ free(set);
+}
+
+/*
+ Quickly dump heap to a named file in a pretty raw format.
+ */
+__private_extern__ BOOL _objc_dumpHeap(auto_zone_t *zone, const char *filename) {
+ // just write interesting info to disk
+ int fd = secure_open(filename, O_WRONLY|O_CREAT, geteuid());
+ if (fd < 0) return NO;
+ FILE *fp = fdopen(fd, "w");
+ if (fp == NULL) {
+ return NO;
+ }
+
+ fwrite(HEADER, strlen(HEADER), 1, fp);
+ char type = myType();
+ fwrite(&type, 1, 1, fp);
+
+ // for each thread...
+
+ // do registers first
+ void (^dump_registers)(const void *, unsigned long) = ^(const void *base, unsigned long byte_size) {
+ char type = REGISTER;
+ fwrite(&type, 1, 1, fp);
+ //fwrite(REGISTER, strlen(REGISTER), 1, fp);
+ fwrite(&byte_size, sizeof(byte_size), 1, fp);
+ fwrite(base, byte_size, 1, fp);
+ };
+
+ // then stacks
+ void (^dump_stack)(const void *, unsigned long) = ^(const void *base, unsigned long byte_size) {
+ char type = THREAD;
+ fwrite(&type, 1, 1, fp);
+ //fwrite(THREAD, strlen(THREAD), 1, fp);
+ fwrite(&byte_size, sizeof(byte_size), 1, fp);
+ fwrite(base, byte_size, 1, fp);
+ };
+
+ // then locals
+ void (^dump_local)(const void *, unsigned long, unsigned int, unsigned long) =
+ ^(const void *address, unsigned long size, unsigned int layout, unsigned long refcount) {
+ // just write the value - rely on it showing up again as a node later
+ char type = LOCAL;
+ fwrite(&type, 1, 1, fp);
+ fwrite(&address, sizeof(address), 1, fp);
+ };
+
+
+
+ // roots
+ void (^dump_root)(const void **) = ^(const void **address) {
+ char type = ROOT;
+ fwrite(&type, 1, 1, fp);
+ // write the address so that we can catch misregistered globals
+ fwrite(&address, sizeof(address), 1, fp);
+ // write content, even (?) if zero
+ fwrite(address, sizeof(*address), 1, fp);
+ };
+
+ // the nodes
+ pointer_set_t *classes = new_pointer_set();
+ void (^dump_node)(const void *, unsigned long, unsigned int, unsigned long) =
+ ^(const void *address, unsigned long size, unsigned int layout, unsigned long refcount) {
+ char type = NODE;
+ fwrite(&type, 1, 1, fp);
+ fwrite(&address, sizeof(address), 1, fp);
+ fwrite(&size, sizeof(size), 1, fp);
+ fwrite(&layout, sizeof(layout), 1, fp);
+ fwrite(&refcount, sizeof(refcount), 1, fp);
+ if ((layout & AUTO_UNSCANNED) != AUTO_UNSCANNED) {
+ // now the nodes unfiltered content
+ fwrite(address, size, 1, fp);
+ }
+ if ((layout & AUTO_OBJECT) == AUTO_OBJECT) {
+ long theClass = *(long *)address;
+ if (theClass) pointer_set_add(classes, theClass);
+ }
+ };
+
+ // weak
+ void (^dump_weak)(const void **, const void *) = ^(const void **address, const void *item) {
+ char type = WEAK;
+ fwrite(&type, 1, 1, fp);
+ fwrite(&address, sizeof(address), 1, fp);
+ fwrite(&item, sizeof(item), 1, fp);
+ };
+
+ auto_zone_dump(zone, dump_stack, dump_registers, dump_local, dump_root, dump_node, dump_weak);
+
+ pointer_set_iterate(classes, ^(long class) {
+ char type = CLASS;
+ fwrite(&type, 1, 1, fp);
+ fwrite(&class, sizeof(class), 1, fp); // write address so that we can map it from node isa's
+ // classname (for grins)
+ const char *className = class_getName((Class)class);
+ unsigned int length = (int)strlen(className);
+ fwrite(&length, sizeof(length), 1, fp); // n
+ fwrite(className, length, 1, fp); // n bytes
+ // strong layout
+ const char *layout = class_getIvarLayout((Class)class);
+ length = layout ? (int)strlen(layout)+1 : 0; // format is <skipnibble><count nibble> ending with <0><0>
+ fwrite(&length, sizeof(length), 1, fp); // n
+ fwrite(layout, length, 1, fp); // n bytes
+ // weak layout
+ layout = class_getWeakIvarLayout((Class)class);
+ length = layout ? (int)strlen(layout)+1 : 0; // format is <skipnibble><count nibble> ending with <0><0>
+ fwrite(&length, sizeof(length), 1, fp); // n
+ fwrite(layout, length, 1, fp); // n bytes
+ });
+
+ {
+ // end
+ char type = END;
+ fwrite(&type, 1, 1, fp);
+ fclose(fp);
+ pointer_set_dispose(classes);
+ }
+ return YES;
+}
projects / apple / objc4.git / blobdiff