blob: 97768dc341aae998e3cfa33e51a547478489c28b (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
|
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "net/http/http_server_properties.h"
#include "base/debug/alias.h"
#include "base/logging.h"
#include "base/stringprintf.h"
namespace net {
const char kAlternateProtocolHeader[] = "Alternate-Protocol";
const char* const kAlternateProtocolStrings[] = {
"npn-spdy/1",
"npn-spdy/2",
"npn-spdy/2.1",
"npn-spdy/3",
};
static const char* AlternateProtocolToString(AlternateProtocol protocol) {
switch (protocol) {
case NPN_SPDY_1:
case NPN_SPDY_2:
case NPN_SPDY_21:
case NPN_SPDY_3:
return kAlternateProtocolStrings[protocol];
case ALTERNATE_PROTOCOL_BROKEN:
return "Broken";
case UNINITIALIZED_ALTERNATE_PROTOCOL:
return "Uninitialized";
default:
NOTREACHED();
return "";
}
}
std::string PortAlternateProtocolPair::ToString() const {
return base::StringPrintf("%d:%s", port,
AlternateProtocolToString(protocol));
}
HttpServerProperties::HttpServerProperties()
: has_deletion_stack_trace_(false),
liveness_token_(TOKEN_ALIVE) {
}
HttpServerProperties::~HttpServerProperties() {
// Crash if this is a double free!
CheckIsAlive();
// Mark the object as dead.
liveness_token_ = TOKEN_DEAD;
if (!has_deletion_stack_trace_) {
// Save the current thread's stack trace.
has_deletion_stack_trace_ = true;
deletion_stack_trace_ = base::debug::StackTrace();
}
// I doubt this is necessary to prevent optimization, but it can't hurt.
base::debug::Alias(&liveness_token_);
base::debug::Alias(&has_deletion_stack_trace_);
base::debug::Alias(&deletion_stack_trace_);
}
void HttpServerProperties::CheckIsAlive() {
// Copy the deletion stacktrace onto stack in case we crash.
base::debug::StackTrace deletion_stack_trace = deletion_stack_trace_;
base::debug::Alias(&deletion_stack_trace);
// Copy the token onto stack in case it mismatches so we can explore its
// value.
LivenessToken liveness_token = liveness_token_;
base::debug::Alias(&liveness_token);
CHECK_EQ(liveness_token, TOKEN_ALIVE);
}
} // namespace net
|
