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[WebAssembly] WASI support for libcxx

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This adds explicit support for the WASI platform to libcxx.

WASI libc uses some components from musl, however it's not fully compatible
with musl, so we're planning to stop using _LIBCPP_HAS_MUSL_LIBC and
customize for WASI libc specifically.

Differential Revision: https://reviews.llvm.org/D61336

Reviewers: sbc100, ldionne


git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@359703 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2019-05-01 16:47:30 +00:00
parent 0c6eb81c47
commit d6842df3f7
5 changed files with 12 additions and 6 deletions
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7
include/__config
View File

@ -307,7 +307,7 @@
// random data even when using sandboxing mechanisms such as chroots,
// Capsicum, etc.
# define _LIBCPP_USING_ARC4_RANDOM
#elif defined(__Fuchsia__)
#elif defined(__Fuchsia__) || defined(__wasi__)
# define _LIBCPP_USING_GETENTROPY
#elif defined(__native_client__)
// NaCl's sandbox (which PNaCl also runs in) doesn't allow filesystem access,
@ -341,7 +341,7 @@
# if defined(__FreeBSD__)
# define _LIBCPP_HAS_QUICK_EXIT
# define _LIBCPP_HAS_C11_FEATURES
# elif defined(__Fuchsia__)
# elif defined(__Fuchsia__) || defined(__wasi__)
# define _LIBCPP_HAS_QUICK_EXIT
# define _LIBCPP_HAS_TIMESPEC_GET
# define _LIBCPP_HAS_C11_FEATURES
@ -1133,6 +1133,7 @@ _LIBCPP_FUNC_VIS extern "C" void __sanitizer_annotate_contiguous_container(
!defined(_LIBCPP_HAS_THREAD_API_EXTERNAL)
# if defined(__FreeBSD__) || \
defined(__Fuchsia__) || \
defined(__wasi__) || \
defined(__NetBSD__) || \
defined(__linux__) || \
defined(__GNU__) || \
@ -1179,7 +1180,7 @@ _LIBCPP_FUNC_VIS extern "C" void __sanitizer_annotate_contiguous_container(
#endif
#if defined(__BIONIC__) || defined(__CloudABI__) || \
defined(__Fuchsia__) || defined(_LIBCPP_HAS_MUSL_LIBC)
defined(__Fuchsia__) || defined(__wasi__) || defined(_LIBCPP_HAS_MUSL_LIBC)
#define _LIBCPP_PROVIDES_DEFAULT_RUNE_TABLE
#endif

3
include/__locale
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@ -35,6 +35,9 @@
# include <xlocale.h>
#elif defined(__Fuchsia__)
# include <support/fuchsia/xlocale.h>
#elif defined(__wasi__)
// WASI libc uses musl's locales support.
# include <support/musl/xlocale.h>
#elif defined(_LIBCPP_HAS_MUSL_LIBC)
# include <support/musl/xlocale.h>
#endif

2
src/include/config_elast.h
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@ -23,6 +23,8 @@
#define _LIBCPP_ELAST __ELASTERROR
#elif defined(__Fuchsia__)
// No _LIBCPP_ELAST needed on Fuchsia
#elif defined(__wasi__)
// No _LIBCPP_ELAST needed on WASI
#elif defined(__linux__) || defined(_LIBCPP_HAS_MUSL_LIBC)
#define _LIBCPP_ELAST 4095
#elif defined(__APPLE__)

4
src/thread.cpp
View File

@ -23,9 +23,9 @@
# endif
#endif // defined(__unix__) || (defined(__APPLE__) && defined(__MACH__))
#if defined(__unix__) || (defined(__APPLE__) && defined(__MACH__)) || defined(__CloudABI__) || defined(__Fuchsia__)
#if defined(__unix__) || (defined(__APPLE__) && defined(__MACH__)) || defined(__CloudABI__) || defined(__Fuchsia__) || defined(__wasi__)
# include <unistd.h>
#endif // defined(__unix__) || (defined(__APPLE__) && defined(__MACH__)) || defined(__CloudABI__) || defined(__Fuchsia__)
#endif // defined(__unix__) || (defined(__APPLE__) && defined(__MACH__)) || defined(__CloudABI__) || defined(__Fuchsia__) || defined(__wasi__)
#if defined(__NetBSD__)
#pragma weak pthread_create // Do not create libpthread dependency

2
test/support/test_macros.h
View File

@ -148,7 +148,7 @@
// Specifically, FreeBSD does NOT have timespec_get, even though they have all
// the rest of C11 - this is PR#38495
# define TEST_HAS_C11_FEATURES
# elif defined(__Fuchsia__)
# elif defined(__Fuchsia__) || defined(__wasi__)
# define TEST_HAS_C11_FEATURES
# define TEST_HAS_TIMESPEC_GET
# elif defined(__linux__)