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
|
#import "NSObject+SPInvocationGrabbing.h"
#import <execinfo.h>
#pragma mark Invocation grabbing
@interface SPInvocationGrabber ()
@property (readwrite, retain, nonatomic) id object;
@property (readwrite, retain, nonatomic) NSInvocation *invocation;
@end
@implementation SPInvocationGrabber
- (id)initWithObject:(id)obj {
return [self initWithObject:obj stacktraceSaving:YES];
}
- (id)initWithObject:(id)obj stacktraceSaving:(BOOL)saveStack {
self.object = obj;
if (saveStack)
[self saveBacktrace];
return self;
}
- (void)dealloc {
free(frameStrings);
self.object = nil;
self.invocation = nil;
// [super dealloc];
}
@synthesize invocation = _invocation, object = _object;
@synthesize backgroundAfterForward, onMainAfterForward, waitUntilDone;
- (void)runInBackground {
@try {
[self invoke];
}
@finally {}
}
- (void)forwardInvocation:(NSInvocation *)anInvocation {
[anInvocation retainArguments];
anInvocation.target = _object;
self.invocation = anInvocation;
if(backgroundAfterForward)
[NSThread detachNewThreadSelector:@selector(runInBackground) toTarget:self withObject:nil];
else if(onMainAfterForward)
[self performSelectorOnMainThread:@selector(invoke) withObject:nil waitUntilDone:waitUntilDone];
}
- (NSMethodSignature *)methodSignatureForSelector:(SEL)inSelector {
NSMethodSignature *signature = [super methodSignatureForSelector:inSelector];
if (signature == NULL)
signature = [_object methodSignatureForSelector:inSelector];
return signature;
}
- (void)invoke {
@try {
[_invocation invoke];
}
@catch (NSException * e) {
NSLog(@"SPInvocationGrabber's target raised %@:\n\t%@\nInvocation was originally scheduled at:", e.name, e);
[self printBacktrace];
printf("\n");
[e raise];
}
self.invocation = nil;
self.object = nil;
}
- (void)saveBacktrace {
void *backtraceFrames[128];
frameCount = backtrace(&backtraceFrames[0], 128);
frameStrings = backtrace_symbols(&backtraceFrames[0], frameCount);
}
- (void)printBacktrace {
for(int x = 3; x < frameCount; x++) {
if(frameStrings[x] == NULL) { break; }
printf("%s\n", frameStrings[x]);
}
}
@end
@implementation NSObject (SPInvocationGrabbing)
-(id)grab {
return [[SPInvocationGrabber alloc] initWithObject:self];
}
- (id)invokeAfter:(NSTimeInterval)delta {
id grabber = [self grab];
[NSTimer scheduledTimerWithTimeInterval:delta target:grabber selector:@selector(invoke) userInfo:nil repeats:NO];
return grabber;
}
- (id)nextRunloop {
return [self invokeAfter:0];
}
- (id)inBackground {
SPInvocationGrabber *grabber = [self grab];
grabber.backgroundAfterForward = YES;
return grabber;
}
- (id)onMainAsync:(BOOL)async {
SPInvocationGrabber *grabber = [self grab];
grabber.onMainAfterForward = YES;
grabber.waitUntilDone = !async;
return grabber;
}
@end
|
