Message 238320 - Python tracker

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Author	vstinner
Recipients	abacabadabacaba, ezio.melotti, mrabarnett, vstinner
Date	2015-03-17.17:09:24
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<[email protected]>
In-reply-to

Content
There is maybe a bug. Can you show an example of regex and a text where the memory leak occurs? You can use the tracemalloc module to check if there is a memory leak. Or use sys.getcounts() if you compiled Python in debug mode. sre_lib.h is very complex, it uses the C instruction "goto" with regex bytecodes. "DO_JUMP(JUMP_REPEAT, jump_repeat, ctx->pattern+ctx->pattern[0]);" calls "goto entrace" to execute following bytecodes, but later it comes back after DO_JUMP() with the "jump_repeat:" label: https://hg.python.org/cpython/file/c89f7c34e356/Modules/sre_lib.h#l1180

There is maybe a bug. Can you show an example of regex and a text where the memory leak occurs? You can use the tracemalloc module to check if there is a memory leak. Or use sys.getcounts() if you compiled Python in debug mode.

sre_lib.h is very complex, it uses the C instruction "goto" with regex bytecodes.

"DO_JUMP(JUMP_REPEAT, jump_repeat, ctx->pattern+ctx->pattern[0]);" calls "goto entrace" to execute following bytecodes, but later it comes back after DO_JUMP() with the "jump_repeat:" label:

https://hg.python.org/cpython/file/c89f7c34e356/Modules/sre_lib.h#l1180

History
Date	User	Action	Args
2015-03-17 17:09:24	vstinner	set	recipients: + vstinner, ezio.melotti, mrabarnett, abacabadabacaba
2015-03-17 17:09:24	vstinner	set	messageid: <[email protected]>
2015-03-17 17:09:24	vstinner	link	issue23689 messages
2015-03-17 17:09:24	vstinner	create