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[Bug libc/20435] New: Missing unwind info in setcontext causes infinite loop in _Unwind_Backtrace
- From: "schwab at linux-m68k dot org" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sourceware dot org
- Date: Thu, 04 Aug 2016 09:52:43 +0000
- Subject: [Bug libc/20435] New: Missing unwind info in setcontext causes infinite loop in _Unwind_Backtrace
- Auto-submitted: auto-generated
https://sourceware.org/bugzilla/show_bug.cgi?id=20435
Bug ID: 20435
Summary: Missing unwind info in setcontext causes infinite loop
in _Unwind_Backtrace
Product: glibc
Version: 2.22
Status: NEW
Severity: normal
Priority: P2
Component: libc
Assignee: unassigned at sourceware dot org
Reporter: schwab@linux-m68k.org
CC: drepper.fsp at gmail dot com
Target Milestone: ---
Host: arm*-*-*
Since setcontext transfers to a different stack it should be marked
.cantunwind, so that the EABI unwinder does not try to unwind past it. This
can cause _Unwind_Backtrace (used by backtrace_full in libbacktrace) to
infloop.
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