Patch 200701261-1 - Rational Apex Embedded (VxWorks/Tornado)
                    4.2 for Sun Solaris->Intel i386/Pentium
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To install this patch, download these 3 files and run the install script:
   install_sol_200701261_1
   sol.patch.200701261-1.inventory
   sol.patch.200701261-1.tar.Z


Description

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It is suggested that all users install this patch.

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This patch fixes the following:

Defect RATLC00147896:

The C/C++ front end and code generator (tmcfe and cg) fixing
RATLC00389186 are incompatible with the release debugger and
disassembler. Attempts to use the release debugger or dissasembler on
programs created with the new tmcfe and cg produce the error message:

version mismatch (expecting version 4, found version 5)

This patch provides debugger and disassembler executables compatible
with the fix for RATLC00389186.

Defect RATLC00147898:

In Apex 4.2.0 embedded products targeting Intel Pentium
processors, subprograms may restore the stack frame base pointer
(register EBP) from the stack frame after it has been deallocated. If
such a subprogram is interrupted after the stack frame has been
deallocated but before EBP is restored, the restored base pointer can
have an arbitrary value. This causes rare, unpredictable, and
difficult to reproduce bugs.
This patch addresses this problem in the C/C++ compiler
by deallocating stack frames such that the saved EBP remains at the
top of the stack, where it is popped into the EBP register.

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The following were fixed in earlier patches. The fixes are
included in this patch as well.

Defect RATLC00142448:

In Apex 4.2.0 embedded products targeting Intel Pentium
processors, subprograms may restore the stack frame base pointer
(register EBP) from the stack frame after it has been deallocated. If
such a subprogram is interrupted after the stack frame has been
deallocated but before EBP is restored, the restored base pointer can
have an arbitrary value. This causes rare, unpredictable, and
difficult to reproduce bugs.
This problem only occurs in Ada code compiled with the following
switches in the view Policy/Switches file:

OPTIMIZATION_OBJECTIVE: TIME
CODER_OPTIONS: -INFO ARCHITECTURE:IA_586

This patch addresses the problem by deallocating stack frames such
that the saved EBP remains at the top of the stack, where it is popped
into the EBP register.

Defect RATLC00389186:

Large const arrays cause an internal error in Rational Ada Embedded
Developer for VxWorks Intel Architecture. This problem was fixed in
the Native C++ compiler front end; this patch includes a new C++ cross
compiler for VxWorks Intel Architecture. Once the front end was fixed
it was found that the code generator took excessively long to process
large const arrays. A new sort algorithm was incorporated into the
code generator to speed this up.

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It is suggested that all users install this patch.