From 88454f844efe26ea8ac7f394a72b1e6620dccf7e Mon Sep 17 00:00:00 2001 From: Peter Maydell Date: Sat, 26 Feb 2022 18:07:21 +0000 Subject: util: Use meson checks for valloc() and memalign() presence Instead of assuming that all CONFIG_BSD have valloc() and anything else is memalign(), explicitly check for those functions in meson.build and use the "is the function present" define. Tests for specific functionality are better than which-OS checks; this also lets us give a helpful error message if somehow there's no usable function present. Signed-off-by: Peter Maydell Reviewed-by: Richard Henderson Reviewed-by: Philippe Mathieu-Daudé Message-id: 20220226180723.1706285-8-peter.maydell@linaro.org --- meson.build | 2 ++ util/memalign.c | 6 ++++-- 2 files changed, 6 insertions(+), 2 deletions(-) diff --git a/meson.build b/meson.build index bc0ac931e1..774d0248a6 100644 --- a/meson.build +++ b/meson.build @@ -1623,6 +1623,8 @@ config_host_data.set('CONFIG_POSIX_FALLOCATE', cc.has_function('posix_fallocate' # thinking that Windows has posix_memalign() config_host_data.set('CONFIG_POSIX_MEMALIGN', cc.has_function('posix_memalign', prefix: '#include ')) config_host_data.set('CONFIG_ALIGNED_MALLOC', cc.has_function('_aligned_malloc')) +config_host_data.set('CONFIG_VALLOC', cc.has_function('valloc')) +config_host_data.set('CONFIG_MEMALIGN', cc.has_function('memalign')) config_host_data.set('CONFIG_PPOLL', cc.has_function('ppoll')) config_host_data.set('CONFIG_PREADV', cc.has_function('preadv', prefix: '#include ')) config_host_data.set('CONFIG_SEM_TIMEDWAIT', cc.has_function('sem_timedwait', dependencies: threads)) diff --git a/util/memalign.c b/util/memalign.c index 22b405700e..083aaae619 100644 --- a/util/memalign.c +++ b/util/memalign.c @@ -56,10 +56,12 @@ void *qemu_try_memalign(size_t alignment, size_t size) } #elif defined(CONFIG_ALIGNED_MALLOC) ptr = _aligned_malloc(size, alignment); -#elif defined(CONFIG_BSD) +#elif defined(CONFIG_VALLOC) ptr = valloc(size); -#else +#elif defined(CONFIG_MEMALIGN) ptr = memalign(alignment, size); +#else + #error No function to allocate aligned memory available #endif trace_qemu_memalign(alignment, size, ptr); return ptr; -- cgit v1.2.3-55-g7522