[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[PULL 10/25] build: Check that mlockall() exists
From: |
Peter Maydell |
Subject: |
[PULL 10/25] build: Check that mlockall() exists |
Date: |
Mon, 13 Jul 2020 15:10:49 +0100 |
From: David CARLIER <devnexen@gmail.com>
Instead of assuming that all POSIX platforms provide mlockall(),
test for it in configure. If the host doesn't provide this platform
then os_mlock() will fail -ENOSYS, as it does already on Windows.
This is necessary for Haiku, which does not have mlockall().
Signed-off-by: David Carlier <devnexen@gmail.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20200703145614.16684-4-peter.maydell@linaro.org
[PMM: Expanded commit message; rename to HAVE_MLOCKALL]
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
configure | 15 +++++++++++++++
os-posix.c | 4 ++++
2 files changed, 19 insertions(+)
diff --git a/configure b/configure
index 978505611b1..429c938708e 100755
--- a/configure
+++ b/configure
@@ -2408,6 +2408,18 @@ else
pty_h=no
fi
+cat > $TMPC <<EOF
+#include <sys/mman.h>
+int main(int argc, char *argv[]) {
+ return mlockall(MCL_FUTURE);
+}
+EOF
+if compile_prog "" "" ; then
+ have_mlockall=yes
+else
+ have_mlockall=no
+fi
+
#########################################
# vhost interdependencies and host support
@@ -7902,6 +7914,9 @@ fi
if test "$pty_h" = "yes" ; then
echo "HAVE_PTY_H=y" >> $config_host_mak
fi
+if test "$have_mlockall" = "yes" ; then
+ echo "HAVE_MLOCKALL=y" >> $config_host_mak
+fi
if test "$fuzzing" = "yes" ; then
if test "$have_fuzzer" = "yes"; then
FUZZ_LDFLAGS=" -fsanitize=address,fuzzer"
diff --git a/os-posix.c b/os-posix.c
index 3cd52e1e700..b674b20b1b1 100644
--- a/os-posix.c
+++ b/os-posix.c
@@ -337,6 +337,7 @@ bool is_daemonized(void)
int os_mlock(void)
{
+#ifdef HAVE_MLOCKALL
int ret = 0;
ret = mlockall(MCL_CURRENT | MCL_FUTURE);
@@ -345,4 +346,7 @@ int os_mlock(void)
}
return ret;
+#else
+ return -ENOSYS;
+#endif
}
--
2.20.1
- [PULL 00/25] target-arm queue, Peter Maydell, 2020/07/13
- [PULL 01/25] hw/arm/bcm2836: Remove unused 'cpu_type' field, Peter Maydell, 2020/07/13
- [PULL 02/25] target/arm: Fix mtedesc for do_mem_zpz, Peter Maydell, 2020/07/13
- [PULL 03/25] Add the ability to change the FEC PHY MDIO device number on i.MX25 processor, Peter Maydell, 2020/07/13
- [PULL 04/25] Add the ability to change the FEC PHY MDIO device number on i.MX6 processor, Peter Maydell, 2020/07/13
- [PULL 06/25] target/arm: Don't do raw writes for PMINTENCLR, Peter Maydell, 2020/07/13
- [PULL 05/25] Add the ability to change the FEC PHY MDIO devices numbers on i.MX7 processor, Peter Maydell, 2020/07/13
- [PULL 07/25] virtio-iommu: Fix coverity issue in virtio_iommu_handle_command(), Peter Maydell, 2020/07/13
- [PULL 08/25] build: Enable BSD symbols for Haiku, Peter Maydell, 2020/07/13
- [PULL 09/25] util/qemu-openpty.c: Don't assume pty.h is glibc-only, Peter Maydell, 2020/07/13
- [PULL 10/25] build: Check that mlockall() exists,
Peter Maydell <=
- [PULL 11/25] osdep.h: Always include <sys/signal.h> if it exists, Peter Maydell, 2020/07/13
- [PULL 12/25] osdep.h: For Haiku, define SIGIO as equivalent to SIGPOLL, Peter Maydell, 2020/07/13
- [PULL 14/25] util/compatfd.c: Only include <sys/syscall.h> if CONFIG_SIGNALFD, Peter Maydell, 2020/07/13
- [PULL 13/25] bswap.h: Include <endian.h> on Haiku for bswap operations, Peter Maydell, 2020/07/13
- [PULL 15/25] util/oslib-posix.c: Implement qemu_init_exec_dir() for Haiku, Peter Maydell, 2020/07/13
- [PULL 16/25] util/drm: make portable by avoiding struct dirent d_type, Peter Maydell, 2020/07/13
- [PULL 18/25] target/nios2: in line the semantics of DISAS_UPDATE with other targets, Peter Maydell, 2020/07/13
- [PULL 17/25] target/nios2: add DISAS_NORETURN case for nothing more to generate, Peter Maydell, 2020/07/13
- [PULL 22/25] hw/arm/tosa: Encapsulate misc GPIO handling in a device, Peter Maydell, 2020/07/13
- [PULL 21/25] hw/arm/tosa.c: Detabify, Peter Maydell, 2020/07/13