ssl: refactor errno access #980
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rhenium
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The errno reported in OpenSSL::SSL::SSLError message sometimes does not
match what SSL_accept()/SSL_connect() actually encountered. Depending
on the evaluation order of function arguments to ossl_raise(), it can
be overwritten by peeraddr_ip_str().
Save errno into a local variable immediately after the OpenSSL function
returns, and avoid touching the thread-local errno afterward.
Also, expand rb_sys_fail() and rb_io_{maybe_,}wait_{read,writ}able()
so that they do not rely on errno.
Remove an unnecessary instance variable lookup and constant lookup.
rhenium
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The
errnoreported inOpenSSL::SSL::SSLErrormessage sometimes does not match whatSSL_accept()/SSL_connect()actually encountered. Depending on the evaluation order of function arguments toossl_raise(), it can be overwritten bypeeraddr_ip_str().Save
errnointo a local variable immediately after the OpenSSL function returns, and avoid touching the thread-localerrnoafterward.Also, expand
rb_sys_fail()andrb_io_maybe_wait_{readable,writable}()so that they do not rely on errno.