src: fix mismatched delete[] in src/node_file.cc #1092
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No open issues about it yet. |
| inline const char* dest() const { return dest_; } | ||
| inline unsigned int dest_len() const { return dest_len_; } | ||
| inline void dest_len(unsigned int dest_len) { dest_len_ = dest_len; } | ||
| void* operator new(size_t size) = delete; |
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Fix a bad delete of a pointer that was allocated with placement new. Casting the pointer was not the right solution because there was at least one non-placement new constructor call. This commit rewrites FSReqWrap to be more explicit about ownership of the auxiliary data and removes a number of egregious const_casts. The ASYNC_DEST_CALL macro also gets significantly slimmed down. PR-URL: nodejs#1092 Reviewed-By: Fedor Indutny <fedor@indutny.com>
The SYNC_CALL macro returns on error, bypassing the delete[] call. Mea culpa, it looks like I introduced this memory leak back in 2013, in commit d2b80b8 ("src: clean up FSReqWrap"). PR-URL: nodejs#1092 Reviewed-By: Fedor Indutny <fedor@indutny.com>
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LGTM |
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@indutny I pushed another commit to fix a memory leak in the fs.writeSync() error path. Can you PTAL? |
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Those SYNC_CALL and ASYNC_CALL macros are a special kind of evil. One of the first rules of C macros is that you don't push control flow into them and what do they do? Exactly. |
| return args.GetReturnValue().Set(SYNC_RESULT); | ||
| } | ||
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| FSReqWrap* req_wrap = | ||
| new FSReqWrap(env, req.As<Object>(), "write", must_free ? buf : nullptr); | ||
| FSReqWrap::New(env, req.As<Object>(), "write", buf, ownership); |
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So you pas buf here, where does it die?
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Anyway it seems that the buf should be deallocated somewhere.
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It's freed by FSReqWrap's destructor because ownership == MOVE.
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One comment, otherwise LGTM |
| FSReqWrap* that; | ||
| char* const storage = new char[sizeof(*that) + size]; | ||
| that = new(storage) FSReqWrap(env, req, syscall, data); | ||
| if (copy) |
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Oh, I guess it becomes parts of FSReqWrap?
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Fix a bad delete of a pointer that was allocated with placement new.
Casting the pointer was not the right solution because there was at
least one non-placement new constructor call.
This commit rewrites FSReqWrap to be more explicit about ownership of
the auxiliary data and removes a number of egregious const_casts.
The ASYNC_DEST_CALL macro also gets significantly slimmed down.
R=@indutny
Is there a bug number I should reference in the commit log?
https://jenkins-iojs.nodesource.com/view/iojs/job/iojs+any-pr+multi/257/