By tuning the stap script to SIGSTOP the offending process, we can get
a much better view of the situation - here using pstree:
pbuilder,4611 /usr/sbin/pbuilder --build --buildresult .. --debbuildopts
--debbuildopts -i ../cssc_1.3.0-1.dsc
└─pbuilder-buildp,4612 /usr/lib/pbuilder/pbuilder-buildpackage --buildresult
.. --debbuildopts --debbuildopts -i ../cssc_1.3.0-1.dsc
└─pbuilder-satisf,5767 /usr/lib/pbuilder/pbuilder-satisfydepends
--control ../cssc_1.3.0-1.dsc --chroot /work/pbuilder/build//4612
--internal-chrootexec chroot /work/pbuilder/build//4612 --binary-all
└─pbuilder-satisf,5768 /usr/lib/pbuilder/pbuilder-satisfydepends
--control ../cssc_1.3.0-1.dsc --chroot /work/pbuilder/build//4612
--internal-chrootexec chroot /work/pbuilder/build//4612 --binary-all
└─dpkg-architectu,5769 /usr/bin/dpkg-architecture -qDEB_HOST_ARCH
└─sh,5770 -c ${CC:-gcc} -dumpmachine
└─gcc,5771 -dumpmachine
A quick test can be done of reqesting disabling of ccache while calling
dpkg-architecture.
Test:
--- /usr/lib/pbuilder/pbuilder-satisfydepends.orig 2013-08-29
23:34:32.000000000 +0200
+++ /usr/lib/pbuilder/pbuilder-satisfydepends 2013-08-29 23:36:23.000000000
+0200
@@ -59,7 +59,7 @@
function checkbuilddep_internal () {
# Use this function to fulfill the dependency (almost)
- local ARCH=$($CHROOTEXEC dpkg-architecture -qDEB_HOST_ARCH)
+ local ARCH=$($CHROOTEXEC env CCACHE_DISABLE=1 dpkg-architecture
-qDEB_HOST_ARCH)
local BUILD_DEP_DEB_DIR
local BUILD_DEP_DEB_CONTROL
local DEPENDS
For some reason, the stap script still traps a mkdir done as root,
while I can check through /proc that dpkg-architecture and gcc do have
CCACHE_DISABLE=1 in their env.
Another try: if ccache ignores the disable request, maybe we can ask
it not to touch the cache ?
--- /usr/lib/pbuilder/pbuilder-satisfydepends.orig 2013-08-29
23:34:32.000000000 +0200
+++ /usr/lib/pbuilder/pbuilder-satisfydepends 2013-08-29 23:56:48.000000000
+0200
@@ -59,7 +59,7 @@
function checkbuilddep_internal () {
# Use this function to fulfill the dependency (almost)
- local ARCH=$($CHROOTEXEC dpkg-architecture -qDEB_HOST_ARCH)
+ local ARCH=$($CHROOTEXEC env CCACHE_READONLY=1
CCACHE_TEMPDIR=${TMPDIR:-/tmp} dpkg-architecture -qDEB_HOST_ARCH)
local BUILD_DEP_DEB_DIR
local BUILD_DEP_DEB_CONTROL
local DEPENDS
... but similarly, ccache seems to ignore the request, which can be
seen in the processes' env.
Is there some ccache subtlety I'm missing ? Could ccache maints lend a hand
here ?
Best regards,
--
Yann
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