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Re: toolchain/46490: libexecinfo only wokrs on amd64
The following reply was made to PR toolchain/46490; it has been noted by GNATS.
From: christos%zoulas.com@localhost (Christos Zoulas)
To: gnats-bugs%NetBSD.org@localhost, toolchain-manager%netbsd.org@localhost,
Subject: Re: toolchain/46490: libexecinfo only wokrs on amd64
Date: Mon, 28 May 2012 09:06:19 -0400
On May 28, 10:50am, martin%NetBSD.org@localhost (martin%NetBSD.org@localhost)
-- Subject: toolchain/46490: libexecinfo only wokrs on amd64
| The new libexecinfo seems to be implemented using a technique that is gcc
| specific and only works (with default compile flags) on amd64, where
| .eh_frame_hdr and .eh_frame sections are generated by default.n
I thought that using _Unwind_Foo should work on every arch.
| The corresponding test case seems to fail everywhere else right now.
| The _Unwind_Backtrace() call calls back into "tracer" once, the t->n value
| is still (size_t)~0U so this frame is skipped, then unwinding terminates
| with reason 5 (end of stack) and zero frames are returned.
| Run t_backtrace for example on sparc64.
| I am not sure this is fixable, may need some other technique.
Try USE_BUILTIN=yes in the Makefile.
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