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
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
|
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* vim: set ts=8 sts=4 et sw=4 tw=99:
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/*
* JS runtime exception classes.
*/
#ifndef jsexn_h
#define jsexn_h
#include "jsapi.h"
#include "jscntxt.h"
#include "NamespaceImports.h"
namespace js {
class ErrorObject;
JSErrorNotes::Note*
CopyErrorNote(JSContext* cx, JSErrorNotes::Note* note);
JSErrorReport*
CopyErrorReport(JSContext* cx, JSErrorReport* report);
JSString*
ComputeStackString(JSContext* cx);
/*
* Given a JSErrorReport, check to see if there is an exception associated with
* the error number. If there is, then create an appropriate exception object,
* set it as the pending exception, and set the JSREPORT_EXCEPTION flag on the
* error report.
*
* It's possible we fail (due to OOM or some other error) and end up setting
* cx->exception to a different exception. The original error described by
* *reportp typically won't be reported anywhere in this case.
*
* If the error code is unrecognized, or if we decided to do nothing in order to
* avoid recursion, we simply return and this error is just being swept under
* the rug.
*/
extern void
ErrorToException(JSContext* cx, JSErrorReport* reportp,
JSErrorCallback callback, void* userRef);
extern JSErrorReport*
ErrorFromException(JSContext* cx, HandleObject obj);
/*
* Make a copy of errobj parented to cx's compartment's global.
*
* errobj may be in a different compartment than cx, but it must be an Error
* object (not a wrapper of one) and it must not be one of the standard error
* prototype objects (errobj->getPrivate() must not be nullptr).
*/
extern JSObject*
CopyErrorObject(JSContext* cx, JS::Handle<ErrorObject*> errobj);
static_assert(JSEXN_ERR == 0 &&
JSProto_Error + JSEXN_INTERNALERR == JSProto_InternalError &&
JSProto_Error + JSEXN_EVALERR == JSProto_EvalError &&
JSProto_Error + JSEXN_RANGEERR == JSProto_RangeError &&
JSProto_Error + JSEXN_REFERENCEERR == JSProto_ReferenceError &&
JSProto_Error + JSEXN_SYNTAXERR == JSProto_SyntaxError &&
JSProto_Error + JSEXN_TYPEERR == JSProto_TypeError &&
JSProto_Error + JSEXN_URIERR == JSProto_URIError &&
JSProto_Error + JSEXN_DEBUGGEEWOULDRUN == JSProto_DebuggeeWouldRun &&
JSProto_Error + JSEXN_WASMCOMPILEERROR == JSProto_CompileError &&
JSProto_Error + JSEXN_WASMRUNTIMEERROR == JSProto_RuntimeError &&
JSEXN_WASMRUNTIMEERROR + 1 == JSEXN_WARN &&
JSEXN_WARN + 1 == JSEXN_LIMIT,
"GetExceptionProtoKey and ExnTypeFromProtoKey require that "
"each corresponding JSExnType and JSProtoKey value be separated "
"by the same constant value");
static inline JSProtoKey
GetExceptionProtoKey(JSExnType exn)
{
MOZ_ASSERT(JSEXN_ERR <= exn);
MOZ_ASSERT(exn < JSEXN_WARN);
return JSProtoKey(JSProto_Error + int(exn));
}
static inline JSExnType
ExnTypeFromProtoKey(JSProtoKey key)
{
JSExnType type = static_cast<JSExnType>(key - JSProto_Error);
MOZ_ASSERT(type >= JSEXN_ERR);
MOZ_ASSERT(type < JSEXN_ERROR_LIMIT);
return type;
}
static inline bool
IsErrorProtoKey(JSProtoKey key)
{
JSExnType type = static_cast<JSExnType>(key - JSProto_Error);
return type >= JSEXN_ERR && type < JSEXN_ERROR_LIMIT;
}
class AutoClearPendingException
{
JSContext* cx;
public:
explicit AutoClearPendingException(JSContext* cxArg)
: cx(cxArg)
{ }
~AutoClearPendingException() {
JS_ClearPendingException(cx);
}
};
class AutoAssertNoPendingException
{
mozilla::DebugOnly<JSContext*> cx;
public:
explicit AutoAssertNoPendingException(JSContext* cxArg)
: cx(cxArg)
{ }
~AutoAssertNoPendingException() {
MOZ_ASSERT(!JS_IsExceptionPending(cx));
}
};
extern const char*
ValueToSourceForError(JSContext* cx, HandleValue val, JSAutoByteString& bytes);
} // namespace js
#endif /* jsexn_h */
|
