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[PATCH v5 18/20] configure: Detect kcov support and introduce CONFIG_KCO
From: |
Aleksandar Markovic |
Subject: |
[PATCH v5 18/20] configure: Detect kcov support and introduce CONFIG_KCOV |
Date: |
Mon, 13 Jan 2020 21:34:41 +0100 |
From: Aleksandar Markovic <address@hidden>
kcov is kernel code coverage tracing tool. It requires kernel 4.4+
compiled with certain kernel options. Its interface consists of
three ioctls.
This patch checks if kcov support is present on build machine, and
stores the result in variable CONFIG_KCOV, meant to be used in
linux-user code related to the support for above mentioned ioctls.
Signed-off-by: Aleksandar Markovic <address@hidden>
---
configure | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/configure b/configure
index 940bf9e..dbdba8f 100755
--- a/configure
+++ b/configure
@@ -4752,6 +4752,24 @@ if compile_prog "" "" ; then
syncfs=yes
fi
+# check for kcov support (kernel must be 4.4+, compiled with certain options)
+kcov=no
+cat > $TMPC << EOF
+#include <sys/kcov.h>
+
+int main(void)
+{
+ ioctl(-1, KCOV_ENABLE, NULL);
+ ioctl(-1, KCOV_DISABLE, NULL);
+ ioctl(-1, KCOV_INIT_TRACE, NULL);
+
+ return 0;
+}
+EOF
+if compile_prog "" "" ; then
+ kcov=yes
+fi
+
# Check we have a new enough version of sphinx-build
has_sphinx_build() {
# This is a bit awkward but works: create a trivial document and
@@ -6874,6 +6892,9 @@ fi
if test "$syncfs" = "yes" ; then
echo "CONFIG_SYNCFS=y" >> $config_host_mak
fi
+if test "$kcov" = "yes" ; then
+ echo "CONFIG_KCOV=y" >> $config_host_mak
+fi
if test "$inotify" = "yes" ; then
echo "CONFIG_INOTIFY=y" >> $config_host_mak
fi
--
2.7.4
- [PATCH v5 13/20] linux-user: Add support for FITRIM ioctl, (continued)
- [PATCH v5 13/20] linux-user: Add support for FITRIM ioctl, Aleksandar Markovic, 2020/01/13
- [PATCH v5 15/20] linux-user: Add support for FD<SETEMSGTRESH|SETMAXERRS|GETMAXERRS> ioctls, Aleksandar Markovic, 2020/01/13
- [PATCH v5 16/20] linux-user: Add support for FDFMT<BEG|TRK|END> ioctls, Aleksandar Markovic, 2020/01/13
- [PATCH v5 17/20] linux-user: Add support for FDGETFDCSTAT ioctl, Aleksandar Markovic, 2020/01/13
- [PATCH v5 19/20] linux-user: Add support for KCOV_<ENABLE|DISABLE> ioctls, Aleksandar Markovic, 2020/01/13
- [PATCH v5 18/20] configure: Detect kcov support and introduce CONFIG_KCOV,
Aleksandar Markovic <=
- [PATCH v5 20/20] linux-user: Add support for KCOV_INIT_TRACE ioctl, Aleksandar Markovic, 2020/01/13