diff options
Diffstat (limited to 'absl/debugging/internal/address_is_readable.cc')
| -rw-r--r-- | absl/debugging/internal/address_is_readable.cc | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/absl/debugging/internal/address_is_readable.cc b/absl/debugging/internal/address_is_readable.cc index f45e59b..6537606 100644 --- a/absl/debugging/internal/address_is_readable.cc +++ b/absl/debugging/internal/address_is_readable.cc @@ -35,10 +35,12 @@ ABSL_NAMESPACE_END #include <fcntl.h> #include <sys/syscall.h> #include <unistd.h> + #include <atomic> #include <cerrno> #include <cstdint> +#include "absl/base/internal/errno_saver.h" #include "absl/base/internal/raw_logging.h" namespace absl { @@ -67,7 +69,7 @@ static void Unpack(uint64_t x, int *pid, int *read_fd, int *write_fd) { // This is a namespace-scoped variable for correct zero-initialization. static std::atomic<uint64_t> pid_and_fds; // initially 0, an invalid pid. bool AddressIsReadable(const void *addr) { - int save_errno = errno; + absl::base_internal::ErrnoSaver errno_saver; // We test whether a byte is readable by using write(). Normally, this would // be done via a cached file descriptor to /dev/null, but linux fails to // check whether the byte is readable when the destination is /dev/null, so @@ -126,7 +128,6 @@ bool AddressIsReadable(const void *addr) { std::memory_order_relaxed); } } while (errno == EBADF); - errno = save_errno; return bytes_written == 1; } |