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Author SHA1 Message Date
Daniil Kovalev
6bb63002fc
[PAC] Fix address discrimination for type info vtable pointers (#102199) 
In #99726, `-fptrauth-type-info-vtable-pointer-discrimination` was
introduced, which is intended to enable type and address discrimination
for type_info vtable pointers. However, some codegen logic for actually
enabling address discrimination was missing. This patch addresses the
issue.

Fixes #101716
 2024-10-18 08:58:26 +03:00
Fangrui Song
83ea47acd7 [test] Make tests pass regardless of gnu++14/gnu++17 default 
GCC from 11 onwards defaults to -std=gnu++17 for C++ source files. We want to do the same
(https://discourse.llvm.org/t/c-objc-switch-to-gnu-17-as-the-default-dialect/64360).
Split RUN lines, adjust `-verify`, or add `__cplusplus < 201703L` or `-Wno-dynamic-exception-spec`,
so that tests will pass regardless of gnu++14/gnu++17 default.

We have a desire to mark a test compatible with multiple language standards.
There are ongoing discussions how to add markers in the long term:

* https://discourse.llvm.org/t/iterating-lit-run-lines/62596
* https://discourse.llvm.org/t/lit-run-a-run-line-multiple-times-with-different-replacements/64932

As a workaround in the short term, add lit substitutions `%std_cxx98-`,
`%std_cxx11-14`, etc. They can be used for tests which work across multiple
language standards. If a range has `n` standards, run lit multiple times, with
`LIT_CLANG_STD_GROUP=0`, `LIT_CLANG_STD_GROUP=1`, etc to cover all `n` standards.

Reviewed By: #clang-language-wg, aaron.ballman

Differential Revision: https://reviews.llvm.org/D131464
 2022-09-04 05:29:32 +00:00
John McCall
57420b320c type_info objects are not unnamed_addr: the ABI requires us to 
unique them and permits the implementation of dynamic_cast (and
anything else which knows it's working with a complete class
type) to compare their addresses directly.

rdar://16005328

llvm-svn: 201020
 2014-02-08 03:26:05 +00:00
Anders Carlsson
6774b1f1c1 Add -fcxx-exceptions to all tests that use C++ exceptions. 
llvm-svn: 126599
 2011-02-28 00:40:07 +00:00
Anders Carlsson
571e2ad042 Mark VTables and RTTI data linkonce_odr instead of weak_odr, with the exception of explicit template instantiations, which have to be weak_odr. 
This fixes PR6996.

llvm-svn: 124089
 2011-01-24 00:46:19 +00:00
Rafael Espindola
25f4620c67 Set unnamed_addr in every type info. 
llvm-svn: 123293
 2011-01-11 23:55:05 +00:00
John McCall
b3732bb3b7 Just disable the hidden-visibility optimization for now by hiding it behind 
a -cc1 option.  The Darwin linker complains about mixed visibility when linking
gcc-built objects with clang-built objects, and the optimization isn't really
that valuable.  Platforms with less ornery linkers can feel free to enable this.

llvm-svn: 110979
 2010-08-12 23:36:15 +00:00
John McCall
e16adc2b1e Emit standard-library RTTI with external linkage, not weak_odr. 
Apply hidden visibility to most RTTI;  libstdc++ does not rely on exact
pointer equality for the type info (just the type info names).  Apply
the same optimization to RTTI that we do to vtables.

Fixes PR5962.

llvm-svn: 110192
 2010-08-04 08:34:44 +00:00
John McCall
48bf349471 Fix -fno-rtti -fexceptions by forcing the emission of (non-"builtin") RTTI 
when used by the exceptions routines.  Fixes PR 6974.

llvm-svn: 102684
 2010-04-30 01:15:21 +00:00