1 // Copyright 2014 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "mojo/public/cpp/bindings/lib/validation_context.h"
6
7 #include "base/logging.h"
8
9 namespace mojo {
10 namespace internal {
11
ValidationContext(const void * data,size_t data_num_bytes,size_t num_handles,size_t num_associated_endpoint_handles,Message * message,const base::StringPiece & description,int stack_depth)12 ValidationContext::ValidationContext(const void* data,
13 size_t data_num_bytes,
14 size_t num_handles,
15 size_t num_associated_endpoint_handles,
16 Message* message,
17 const base::StringPiece& description,
18 int stack_depth)
19 : message_(message),
20 description_(description),
21 data_begin_(reinterpret_cast<uintptr_t>(data)),
22 data_end_(data_begin_ + data_num_bytes),
23 handle_begin_(0),
24 handle_end_(static_cast<uint32_t>(num_handles)),
25 associated_endpoint_handle_begin_(0),
26 associated_endpoint_handle_end_(
27 static_cast<uint32_t>(num_associated_endpoint_handles)),
28 stack_depth_(stack_depth) {
29 // Check whether the calculation of |data_end_| or static_cast from size_t to
30 // uint32_t causes overflow.
31 // They shouldn't happen but they do, set the corresponding range to empty.
32 if (data_end_ < data_begin_) {
33 NOTREACHED();
34 data_end_ = data_begin_;
35 }
36 if (handle_end_ < num_handles) {
37 NOTREACHED();
38 handle_end_ = 0;
39 }
40 if (associated_endpoint_handle_end_ < num_associated_endpoint_handles) {
41 NOTREACHED();
42 associated_endpoint_handle_end_ = 0;
43 }
44 }
45
~ValidationContext()46 ValidationContext::~ValidationContext() {
47 }
48
49 } // namespace internal
50 } // namespace mojo
51