diff options
Diffstat (limited to 'absl/debugging/internal/vdso_support.cc')
| -rw-r--r-- | absl/debugging/internal/vdso_support.cc | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/absl/debugging/internal/vdso_support.cc b/absl/debugging/internal/vdso_support.cc index 6be16d90..0dfe9ca6 100644 --- a/absl/debugging/internal/vdso_support.cc +++ b/absl/debugging/internal/vdso_support.cc @@ -20,12 +20,25 @@ #ifdef ABSL_HAVE_VDSO_SUPPORT // defined in vdso_support.h +#if !defined(__has_include) +#define __has_include(header) 0 +#endif + #include <errno.h> #include <fcntl.h> +#if __has_include(<syscall.h>) +#include <syscall.h> +#elif __has_include(<sys/syscall.h>) #include <sys/syscall.h> +#endif #include <unistd.h> -#if __GLIBC_PREREQ(2, 16) // GLIBC-2.16 implements getauxval. +#if defined(__GLIBC__) && \ + (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 16)) +#define ABSL_HAVE_GETAUXVAL +#endif + +#ifdef ABSL_HAVE_GETAUXVAL #include <sys/auxv.h> #endif @@ -65,7 +78,7 @@ VDSOSupport::VDSOSupport() // the operation should be idempotent. const void *VDSOSupport::Init() { const auto kInvalidBase = debugging_internal::ElfMemImage::kInvalidBase; -#if __GLIBC_PREREQ(2, 16) +#ifdef ABSL_HAVE_GETAUXVAL if (vdso_base_.load(std::memory_order_relaxed) == kInvalidBase) { errno = 0; const void *const sysinfo_ehdr = @@ -74,7 +87,7 @@ const void *VDSOSupport::Init() { vdso_base_.store(sysinfo_ehdr, std::memory_order_relaxed); } } -#endif // __GLIBC_PREREQ(2, 16) +#endif // ABSL_HAVE_GETAUXVAL if (vdso_base_.load(std::memory_order_relaxed) == kInvalidBase) { int fd = open("/proc/self/auxv", O_RDONLY); if (fd == -1) { |