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Author SHA1 Message Date
Jian Cai 155a43edb0 [compiler-rt][crt] make test case nontrivial in check_cxx_section_exists 
Summary:
.init_array gets optimized away when building with -O2 and as a result,
check_cxx_section_exists failed to pass -DCOMPILER_RT_HAS_INITFINI_ARRAY
when building crtbegin.o and crtend.o, which causes binaries linked with
them encounter segmentation fault. See https://crbug.com/855759 for
details. This change prevents .init_array section to be optimized away
even with -O2 or higher optimization level.

Subscribers: dberris, mgorny, #sanitizers, llvm-commits

Tags: #sanitizers, #llvm

Differential Revision: https://reviews.llvm.org/D67628

llvm-svn: 372038
 2019-09-16 21:47:47 +00:00
Hans Wennborg 9e8b011195 [compiler-rt][crt] Pass -fno-lto in check_cxx_section_exists 
Otherwise it doesn't work when building with -DLLVM_ENABLE_LTO=thin

(We hit this in Chromium in
https://bugs.chromium.org/p/chromium/issues/detail?id=966403)

llvm-svn: 369336
 2019-08-20 07:41:14 +00:00
Petr Hosek cd78209a35 Use CMAKE_C_COMPILER_ARG1 in compiler invocation 
This is needed when using compiler wrappers such as ccache or distcc
and should address the failure on clang-x86_64-debian-fast bot.

Differential Revision: https://reviews.llvm.org/D62104

llvm-svn: 361111
 2019-05-19 03:29:15 +00:00
Shoaib Meenai bbdc8593e1 [compiler-rt] Fix crtbegin.c compilation 
We're building with -std=c11 now (as opposed to -std=gnu11), so we can't
use GNU extensions and need to spell inline assembly as __asm__.

llvm-svn: 360503
 2019-05-11 02:33:33 +00:00
Petr Hosek fc86c7fca3 [crt] Use -std=c11 for crtbegin.o/crtend.o 
The source uses C11 syntax such as comments and some compilers print
warnings without specifying this flag.

Differential Revision: https://reviews.llvm.org/D61797

llvm-svn: 360459
 2019-05-10 19:23:56 +00:00
Fangrui Song 3947968e7f [crtbegin] Fix an off-by-1 bug in __do_fini 
Differential Revision: https://reviews.llvm.org/D61367

llvm-svn: 359850
 2019-05-03 00:11:53 +00:00
Petr Hosek 3e28075ecc [compiler-rt] Use correct spelling of the -Wno-pedantic variable 
This addresses the issue introduced in r359646 which is causing
sanitizer bots to fail.

llvm-svn: 359659
 2019-05-01 07:00:27 +00:00
Fangrui Song 99055b9c38 Use __extension__ to suppress __EH_FRAME_LIST__ warnings 
gcc -pedantic => warning: ISO C forbids empty initializer braces
clang -pedantic => -Wzero-length-array + -Wgnu-empty-initializer

llvm-svn: 359655
 2019-05-01 06:25:21 +00:00
Petr Hosek 738697ea4e [compiler-rt] Pass sysroot and disable pedantic for crtbegin.o/crtend.o 
These are needed to make bots happy.

Differential Revision: https://reviews.llvm.org/D61363

llvm-svn: 359646
 2019-05-01 03:30:51 +00:00
Petr Hosek 999bb5ac27 Reland "[compiler-rt] Simple crtbegin.o and crtend.o implementation" 
Clang relies on existence of certain symbols that are normally
provided by crtbegin.o/crtend.o. However, LLVM does not currently
provide implementation of these files, instead relying on either
libgcc or implementations provided as part of the system.

This change provides an initial implementation of crtbegin.o/crtend.o
that can be used on system that don't provide crtbegin.o/crtend.o as
part of their C library.

Differential Revision: https://reviews.llvm.org/D28791

llvm-svn: 359591
 2019-04-30 18:13:22 +00:00
Petr Hosek 9300f60c8c Revert "[compiler-rt] Simple crtbegin.o and crtend.o implementation" 
This reverts commit r359576 since it's failing on Windows bots.

llvm-svn: 359579
 2019-04-30 17:32:05 +00:00
Petr Hosek c8be6e670e [compiler-rt] Simple crtbegin.o and crtend.o implementation 
Clang relies on existence of certain symbols that are normally
provided by crtbegin.o/crtend.o. However, LLVM does not currently
provide implementation of these files, instead relying on either
libgcc or implementations provided as part of the system.

This change provides an initial implementation of crtbegin.o/crtend.o
that can be used on system that don't provide crtbegin.o/crtend.o as
part of their C library.

Differential Revision: https://reviews.llvm.org/D28791

llvm-svn: 359576
 2019-04-30 17:21:13 +00:00