Message 361696 - Python tracker

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Author	vstinner
Recipients	jd, methane, vstinner
Date	2020-02-10.13:34:57
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1581341697.85.0.279287028141.issue39599@roundup.psfhosted.org>
In-reply-to

Content
You can find the rationale for this change in two issues: * bpo-27987 * bpo-36618 First, it was a warning in clang ubsan (Undefined Behavior Sanitizer). Then ctypes started to crash when Python was compiled with clang. It means that compiling Python 3.7 with clang also had the issue. The quick fix was to compile Python with -fmax-type-align=8 when clang was detected. But it was a signal that something was wrong in Python on x86-64: Python didn't respect the x86-64 ABI.

You can find the rationale for this change in two issues:

* bpo-27987
* bpo-36618

First, it was a warning in clang ubsan (Undefined Behavior Sanitizer).
Then ctypes started to crash when Python was compiled with clang. It
means that compiling Python 3.7 with clang also had the issue.

The quick fix was to compile Python with -fmax-type-align=8 when clang
was detected.

But it was a signal that something was wrong in Python on x86-64:
Python didn't respect the x86-64 ABI.

History
Date	User	Action	Args
2020-02-10 13:34:57	vstinner	set	recipients: + vstinner, methane, jd
2020-02-10 13:34:57	vstinner	set	messageid: <1581341697.85.0.279287028141.issue39599@roundup.psfhosted.org>
2020-02-10 13:34:57	vstinner	link	issue39599 messages
2020-02-10 13:34:57	vstinner	create