#4084: throwing std::runtime on PC BSP fails
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Reporter: Joel Sherrill | Owner: (none)
Type: defect | Status: new
Priority: normal | Milestone: 6.1
Component: tool/gcc | Version: 6
Severity: normal | Keywords:
Blocked By: | Blocking:
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Copied from #2830 for new release milestone. The solution is to update
gcc/config/i386/t-rtems. Whether for gcc 10 or gcc master is the
difference on this CR versus #2830 which had to be to gcc 7 as a patch via
the RSB.
Throwing a std::runtime() exception locks up.
The lock up is in the exception clean up handler where the exception
object is destructed. The destructor loops distructing the std::string
object. The path ends up in libstdc++-v3/include/ext/atomicity.h line 48
or exchange_and_add.
At a guess it would seem like the C++ atomics on i386 is broken or
fragile.
UPDATE: This was broken when gcc i386 eliminated -mcpu in favor of
-march/-mtune. The multilibs were built with -mtune and not -march.
--
Ticket URL: <http://devel.rtems.org/ticket/4084>
RTEMS Project <http://www.rtems.org/>
RTEMS Project
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