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Instead of multiplying the array constant directly with the
size of the offset the cautious_mul function is used to detect
potential overflows.
Bug 20765
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Gcc and clang do not raise an error for this, also it should work
for the last array element which can be without size.
Bug 20765
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The c standard allows member designators for offsetof. The current
implementation works by recursively combining the offset of each
of the member designators. For array access the size of the
subtypes is multiplied by the index and for members the offset of
the member is calculated.
Bug 20765
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The problem was that sub structs are were not correctly aligned.
The new version is much simpler and uses the sizeof_struct to
calculate the individual offsets and add them up to get correct
offest.
Bug 20765
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The implementation of offsetof as macro in the form
((size_t) &((ty*) NULL)->member) has the problem that it cannot be
used everywhere were an integer constant expression is allowed,
for example in initiliazers of global variables and there is also
no check for the case that member is of bitifield type.
The new implementation adds a builtin function for this which is
replaced by an integer constant during elaboration.
Bug 20765
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Follow-up to commit 1df1830
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Those three functions can be useful to implement front-ends for languages other than C.
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The new option -fdiagnostics-format allows it to switch between
the three different format version:
-ccomp (default) with file:line:
-vi with file+line:
-msvc with file(line):
Bug 19872
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Controls whether the [-Woption] is printed in the diagnostic
message for mappable warnings/errors.
Bug 19872
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The option -fmax-errors limits the number of errors that are
reported before the compilation is aborted. The default 0 means no
limit.
Bug 19872
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Instead of escaping all newlines etc for the help options use
quoted strings.
Bug 19872
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More functions are now documented. Furthermore compcert now prints
"ccomp:" instead of nothing for unknown locations.
Bug 19872
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If CompCert crashes because of an uncaught exception the exception
is caught toplevel and the backtrace is printed plus an additional
message to include the backtrace in a support request, if buildnr
and tag are available.
Bug 20681.
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Next try for support of anonymous structs.
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"try ...; true with _ -> false" is dangerous if "..." raises unexpected exceptions such as Out_of_memory or Stack_overflow.
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The naming of anonymous structs is performed by an additional step
in elab_struct_or_union_info instead of in elab_field_group.
Also the aux functions are renamed to access.
Bug 20003
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Instead of using idents the anonymous fileds get names of the
for <anon>_c where c is a counter of all anonymous members.
Bug 20003
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The warning for C11 features is now also triggered for _Noreturn.
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The warning missing declarations is now also triggered for
declarations without name in field lists of composite types if
the declaration is not an anonymous composite or a bitfield member.
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Support for 64-bit target processors + support for x86 in 64-bit mode
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- Introduce Archi.ptr64 parameter.
- Define module Ptrofs of integers as wide as a pointer (64 if Archi.ptr64, 32 otherwise).
- Use Ptrofs.int as the offset type for Vptr values and anywhere pointer offsets are manipulated.
- Modify Val operations that handle pointers (e.g. Val.add, Val.sub, Val.cmpu) so that in 64-bit pointer mode it is the "long" operation (e.g. Val.addl, Val.subl, Val.cmplu) that handles pointers.
- Update the memory model accordingly.
- Modify C operations that handle pointers (e.g. addition, subtraction, comparisons) accordingly.
- Make it possible to turn off the splitting of 64-bit integers into pairs of 32-bit integers.
- Update the compiler front-end and back-end accordingly.
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There is a bug in the fstat implementation in ocaml 4.03 under windows. In
order to prevent this we guard the isatty function with an additional try
with.
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The anonymous members are kept but using them is still an error.
Bug 19907
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Now "expected at least %d" instead of "expected %d". Also improved
error message for __builtin_debug.
Bug 19872
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The only case where compcert raise a pedantic warning was for
implicit int parameters. This is the behavior of clang. However
since not all other pedantic warnings are supported the behavior
of gcc is adopted.
Bug 19872.
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In order to empty declarations it is necessary to distinguish
between forward declarations and empty declarations.
Bug 19859
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Fix minor issues in some proofs and tactics.
Patch by Maxime Dénès.
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These minor problems were revealed by porting CompCert to Coq 8.6, where
they trigger errors.
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