[3.3] [powerpc-linux] libjava testsuite failures with --enable-debug

Wed Apr 30 17:25:00 GMT 2003

On Wed, Apr 30, 2003 at 06:47:26PM +0200, Matthias Klose wrote:
> Configuring with --enable-debug on powerpc-linux shows about 230
> additional failures in the testsuite, all of them of the form:
>> ASSERTION FAILURE: ../../../src/libffi/src/powerpc/ffi.c line 118
>> Looking at libffi/include/ffi_common.h, the assertion triggers, if the
> macro argument is not properly aligned.
>> ffi.c line 118:
> /* Check that everything starts aligned properly. */
> FFI_ASSERT(((unsigned)(char *)stack & 0xF) == 0);
>> Configuring without --enable-debug results in an empty FFI_ASSERT
> definition.

Thanks for tracking this down, at last!
> There seem to be two bugs:
>> - the meaning of --enable-debug is not well defined. For libstdc++
> an extra debugging library is built, for libffi, only one library
> with debugging information is built.
>> - On powerpc-linux, the assertion triggers for a wrong reason, or
> it reveals an alignment problem.
>> Append are the test-summery of libjava configure with --enable-debug.

FWIW, this is an alignment problem - the stack should be 16-byte
aligned. Probably the wrong one of the multitude of stack alignment
macros is being used.
-- 
Daniel Jacobowitz
MontaVista Software Debian GNU/Linux Developer