Search for strongly captured references in Xcode
1
Although it wouldn't necessarily be a retain cycle to capture self in this context:
[[GlobalInstance shared] addBlock:^
[self doSomething];
];
How would you search for occurrences of self being captured in blocks using Xcode? Grep would also be an idea I guess :)
ios xcode
asked Nov 12 '18 at 23:15
COOKIESCOOKIES
11210
add a comment |
1
Although it wouldn't necessarily be a retain cycle to capture self in this context:
[[GlobalInstance shared] addBlock:^
[self doSomething];
];
How would you search for occurrences of self being captured in blocks using Xcode? Grep would also be an idea I guess :)
ios xcode
asked Nov 12 '18 at 23:15
COOKIESCOOKIES
11210
add a comment |
1
1
1
Although it wouldn't necessarily be a retain cycle to capture self in this context:
[[GlobalInstance shared] addBlock:^
[self doSomething];
];
How would you search for occurrences of self being captured in blocks using Xcode? Grep would also be an idea I guess :)
ios xcode
asked Nov 12 '18 at 23:15
COOKIESCOOKIES
11210
Although it wouldn't necessarily be a retain cycle to capture self in this context:
[[GlobalInstance shared] addBlock:^
[self doSomething];
];
How would you search for occurrences of self being captured in blocks using Xcode? Grep would also be an idea I guess :)
ios xcode
ios xcode
asked Nov 12 '18 at 23:15
COOKIESCOOKIES
11210
asked Nov 12 '18 at 23:15
COOKIESCOOKIES
11210
asked Nov 12 '18 at 23:15
COOKIESCOOKIES
11210
asked Nov 12 '18 at 23:15
COOKIESCOOKIES
11210
asked Nov 12 '18 at 23:15
COOKIESCOOKIES
11210
11210
add a comment |
add a comment |
1 Answer
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The only thing that matters is whether you have a retain cycle that causes a leak. Strategies for finding leaks include:
Implement deinit to log and watch the console.
Run under Leaks instrument.
Use the Memory Graph.
answered Nov 12 '18 at 23:21
mattmatt
324k45523723
Howdy @matt. Love your books!! :) Now, you're kinda assuming that I'm looking for a search query that I could use in finding retain cycles -- that's not the case. My question is simply, how would you best find references ofselfwithin any given block? I.e, blocks that don't referenceselfon the first line, but maybe the last?
– COOKIES
Nov 12 '18 at 23:25
But I’m suggesting that’s not a useful thing to look for. :)
– matt
Nov 12 '18 at 23:30
Lol :D Oh, but I insist :D Kidding aside, here's a scenario; Say you stumbled upon a huge code base that have successfully suppressed compiler warnings by confusing the heck out of it, and you'd want to clean up some cycles - what would be a quick way to get the approximate number of occurrences whereselfis captured in any block -- so I could further filter them out by hand. I.e, I don't expect any answer to this question to plug into AST/Clang/SourceKit and actually verify the leak, instead, simply getting a rough draft list of whereselfis captured would butter my biscuit.
– COOKIES
Nov 12 '18 at 23:46
Also, since I have one of the best authors of iOS on the line - would you mind giving your expertise on the following scenario? Say you have a home page menu VC that referencesselfin a block like above. Say that the block is async - and there's no telling on when it'll call. Wouldn't it be safer to apply the weak/strong dance here, as the user could switch pages from a navigation menu, and potentially allocate more than one home page VC - which would potentially have catastrophic consequences?
– COOKIES
Nov 12 '18 at 23:57
1
Yes, perhaps, but I still think the best thing to do is what my answer suggests, namely caveman debugging to track allocation and deallocation of view controllers and other dubious objects as the app runs.
– matt
Nov 13 '18 at 0:12
|
show 2 more comments
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1 Answer
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The only thing that matters is whether you have a retain cycle that causes a leak. Strategies for finding leaks include:
Implement deinit to log and watch the console.
Run under Leaks instrument.
Use the Memory Graph.
answered Nov 12 '18 at 23:21
mattmatt
324k45523723
Howdy @matt. Love your books!! :) Now, you're kinda assuming that I'm looking for a search query that I could use in finding retain cycles -- that's not the case. My question is simply, how would you best find references ofselfwithin any given block? I.e, blocks that don't referenceselfon the first line, but maybe the last?
– COOKIES
Nov 12 '18 at 23:25
But I’m suggesting that’s not a useful thing to look for. :)
– matt
Nov 12 '18 at 23:30
Lol :D Oh, but I insist :D Kidding aside, here's a scenario; Say you stumbled upon a huge code base that have successfully suppressed compiler warnings by confusing the heck out of it, and you'd want to clean up some cycles - what would be a quick way to get the approximate number of occurrences whereselfis captured in any block -- so I could further filter them out by hand. I.e, I don't expect any answer to this question to plug into AST/Clang/SourceKit and actually verify the leak, instead, simply getting a rough draft list of whereselfis captured would butter my biscuit.
– COOKIES
Nov 12 '18 at 23:46
Also, since I have one of the best authors of iOS on the line - would you mind giving your expertise on the following scenario? Say you have a home page menu VC that referencesselfin a block like above. Say that the block is async - and there's no telling on when it'll call. Wouldn't it be safer to apply the weak/strong dance here, as the user could switch pages from a navigation menu, and potentially allocate more than one home page VC - which would potentially have catastrophic consequences?
– COOKIES
Nov 12 '18 at 23:57
1
Yes, perhaps, but I still think the best thing to do is what my answer suggests, namely caveman debugging to track allocation and deallocation of view controllers and other dubious objects as the app runs.
– matt
Nov 13 '18 at 0:12
|
show 2 more comments
0
The only thing that matters is whether you have a retain cycle that causes a leak. Strategies for finding leaks include:
Implement deinit to log and watch the console.
Run under Leaks instrument.
Use the Memory Graph.
answered Nov 12 '18 at 23:21
mattmatt
324k45523723
Howdy @matt. Love your books!! :) Now, you're kinda assuming that I'm looking for a search query that I could use in finding retain cycles -- that's not the case. My question is simply, how would you best find references ofselfwithin any given block? I.e, blocks that don't referenceselfon the first line, but maybe the last?
– COOKIES
Nov 12 '18 at 23:25
But I’m suggesting that’s not a useful thing to look for. :)
– matt
Nov 12 '18 at 23:30
Lol :D Oh, but I insist :D Kidding aside, here's a scenario; Say you stumbled upon a huge code base that have successfully suppressed compiler warnings by confusing the heck out of it, and you'd want to clean up some cycles - what would be a quick way to get the approximate number of occurrences whereselfis captured in any block -- so I could further filter them out by hand. I.e, I don't expect any answer to this question to plug into AST/Clang/SourceKit and actually verify the leak, instead, simply getting a rough draft list of whereselfis captured would butter my biscuit.
– COOKIES
Nov 12 '18 at 23:46
Also, since I have one of the best authors of iOS on the line - would you mind giving your expertise on the following scenario? Say you have a home page menu VC that referencesselfin a block like above. Say that the block is async - and there's no telling on when it'll call. Wouldn't it be safer to apply the weak/strong dance here, as the user could switch pages from a navigation menu, and potentially allocate more than one home page VC - which would potentially have catastrophic consequences?
– COOKIES
Nov 12 '18 at 23:57
1
Yes, perhaps, but I still think the best thing to do is what my answer suggests, namely caveman debugging to track allocation and deallocation of view controllers and other dubious objects as the app runs.
– matt
Nov 13 '18 at 0:12
|
show 2 more comments
0
0
0
The only thing that matters is whether you have a retain cycle that causes a leak. Strategies for finding leaks include:
Implement deinit to log and watch the console.
Run under Leaks instrument.
Use the Memory Graph.
answered Nov 12 '18 at 23:21
mattmatt
324k45523723
The only thing that matters is whether you have a retain cycle that causes a leak. Strategies for finding leaks include:
Implement deinit to log and watch the console.
Run under Leaks instrument.
Use the Memory Graph.
answered Nov 12 '18 at 23:21
mattmatt
324k45523723
answered Nov 12 '18 at 23:21
mattmatt
324k45523723
answered Nov 12 '18 at 23:21
mattmatt
324k45523723
answered Nov 12 '18 at 23:21
mattmatt
324k45523723
324k45523723
Howdy @matt. Love your books!! :) Now, you're kinda assuming that I'm looking for a search query that I could use in finding retain cycles -- that's not the case. My question is simply, how would you best find references ofselfwithin any given block? I.e, blocks that don't referenceselfon the first line, but maybe the last?
– COOKIES
Nov 12 '18 at 23:25
But I’m suggesting that’s not a useful thing to look for. :)
– matt
Nov 12 '18 at 23:30
Lol :D Oh, but I insist :D Kidding aside, here's a scenario; Say you stumbled upon a huge code base that have successfully suppressed compiler warnings by confusing the heck out of it, and you'd want to clean up some cycles - what would be a quick way to get the approximate number of occurrences whereselfis captured in any block -- so I could further filter them out by hand. I.e, I don't expect any answer to this question to plug into AST/Clang/SourceKit and actually verify the leak, instead, simply getting a rough draft list of whereselfis captured would butter my biscuit.
– COOKIES
Nov 12 '18 at 23:46
Also, since I have one of the best authors of iOS on the line - would you mind giving your expertise on the following scenario? Say you have a home page menu VC that referencesselfin a block like above. Say that the block is async - and there's no telling on when it'll call. Wouldn't it be safer to apply the weak/strong dance here, as the user could switch pages from a navigation menu, and potentially allocate more than one home page VC - which would potentially have catastrophic consequences?
– COOKIES
Nov 12 '18 at 23:57
1
Yes, perhaps, but I still think the best thing to do is what my answer suggests, namely caveman debugging to track allocation and deallocation of view controllers and other dubious objects as the app runs.
– matt
Nov 13 '18 at 0:12
|
show 2 more comments
Howdy @matt. Love your books!! :) Now, you're kinda assuming that I'm looking for a search query that I could use in finding retain cycles -- that's not the case. My question is simply, how would you best find references ofselfwithin any given block? I.e, blocks that don't referenceselfon the first line, but maybe the last?
– COOKIES
Nov 12 '18 at 23:25
But I’m suggesting that’s not a useful thing to look for. :)
– matt
Nov 12 '18 at 23:30
Lol :D Oh, but I insist :D Kidding aside, here's a scenario; Say you stumbled upon a huge code base that have successfully suppressed compiler warnings by confusing the heck out of it, and you'd want to clean up some cycles - what would be a quick way to get the approximate number of occurrences whereselfis captured in any block -- so I could further filter them out by hand. I.e, I don't expect any answer to this question to plug into AST/Clang/SourceKit and actually verify the leak, instead, simply getting a rough draft list of whereselfis captured would butter my biscuit.
– COOKIES
Nov 12 '18 at 23:46
Also, since I have one of the best authors of iOS on the line - would you mind giving your expertise on the following scenario? Say you have a home page menu VC that referencesselfin a block like above. Say that the block is async - and there's no telling on when it'll call. Wouldn't it be safer to apply the weak/strong dance here, as the user could switch pages from a navigation menu, and potentially allocate more than one home page VC - which would potentially have catastrophic consequences?
– COOKIES
Nov 12 '18 at 23:57
1
Yes, perhaps, but I still think the best thing to do is what my answer suggests, namely caveman debugging to track allocation and deallocation of view controllers and other dubious objects as the app runs.
– matt
Nov 13 '18 at 0:12
Howdy @matt. Love your books!! :) Now, you're kinda assuming that I'm looking for a search query that I could use in finding retain cycles -- that's not the case. My question is simply, how would you best find references of
self within any given block? I.e, blocks that don't reference self on the first line, but maybe the last?– COOKIES
Nov 12 '18 at 23:25
Howdy @matt. Love your books!! :) Now, you're kinda assuming that I'm looking for a search query that I could use in finding retain cycles -- that's not the case. My question is simply, how would you best find references of
self within any given block? I.e, blocks that don't reference self on the first line, but maybe the last?– COOKIES
Nov 12 '18 at 23:25
But I’m suggesting that’s not a useful thing to look for. :)
– matt
Nov 12 '18 at 23:30
But I’m suggesting that’s not a useful thing to look for. :)
– matt
Nov 12 '18 at 23:30
Lol :D Oh, but I insist :D Kidding aside, here's a scenario; Say you stumbled upon a huge code base that have successfully suppressed compiler warnings by confusing the heck out of it, and you'd want to clean up some cycles - what would be a quick way to get the approximate number of occurrences where
self is captured in any block -- so I could further filter them out by hand. I.e, I don't expect any answer to this question to plug into AST/Clang/SourceKit and actually verify the leak, instead, simply getting a rough draft list of where self is captured would butter my biscuit.– COOKIES
Nov 12 '18 at 23:46
Lol :D Oh, but I insist :D Kidding aside, here's a scenario; Say you stumbled upon a huge code base that have successfully suppressed compiler warnings by confusing the heck out of it, and you'd want to clean up some cycles - what would be a quick way to get the approximate number of occurrences where
self is captured in any block -- so I could further filter them out by hand. I.e, I don't expect any answer to this question to plug into AST/Clang/SourceKit and actually verify the leak, instead, simply getting a rough draft list of where self is captured would butter my biscuit.– COOKIES
Nov 12 '18 at 23:46
Also, since I have one of the best authors of iOS on the line - would you mind giving your expertise on the following scenario? Say you have a home page menu VC that references
self in a block like above. Say that the block is async - and there's no telling on when it'll call. Wouldn't it be safer to apply the weak/strong dance here, as the user could switch pages from a navigation menu, and potentially allocate more than one home page VC - which would potentially have catastrophic consequences?– COOKIES
Nov 12 '18 at 23:57
Also, since I have one of the best authors of iOS on the line - would you mind giving your expertise on the following scenario? Say you have a home page menu VC that references
self in a block like above. Say that the block is async - and there's no telling on when it'll call. Wouldn't it be safer to apply the weak/strong dance here, as the user could switch pages from a navigation menu, and potentially allocate more than one home page VC - which would potentially have catastrophic consequences?– COOKIES
Nov 12 '18 at 23:57
1
1
Yes, perhaps, but I still think the best thing to do is what my answer suggests, namely caveman debugging to track allocation and deallocation of view controllers and other dubious objects as the app runs.
– matt
Nov 13 '18 at 0:12
Yes, perhaps, but I still think the best thing to do is what my answer suggests, namely caveman debugging to track allocation and deallocation of view controllers and other dubious objects as the app runs.
– matt
Nov 13 '18 at 0:12
|
show 2 more comments
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