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https://gitlab.com/libvirt/libvirt.git
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018f7fa8dc
Meson doesn't use .libs directory, everything is placed directly into directories where meson.build file is used. In order to have working tests and running libvirt directly from GIT we need to fix all the paths pointing '.libs' directory. Signed-off-by: Pavel Hrdina <phrdina@redhat.com> Reviewed-by: Ján Tomko <jtomko@redhat.com> Reviewed-by: Peter Krempa <pkrempa@redhat.com> Reviewed-by: Neal Gompa <ngompa13@gmail.com>
118 lines
2.6 KiB
Plaintext
118 lines
2.6 KiB
Plaintext
#!/usr/bin/stap --ldd -d /usr/sbin/libvirtd -c libvirtd
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#
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# Usage with installed libvirt daemon:
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# stap --ldd -d /usr/sbin/libvirtd -c libvirtd \
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# lock-debug.stp /usr/lib/libvirt.so
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#
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# If made executable; simple './lock-debug.stp' should work too.
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#
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# TODOs:
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#
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# Document usage with uninstalled daemon and libs. Assuming CWD is toplevel
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# source git directory, it should be only slight modification to the following:
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#
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# ./run stap --ldd -c src/libvirtd -d src/libvirtd
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# examples/systemtap/lock-debug.stp src/libvirt.so
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#
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# Debug RWLock mechanisms as well.
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#
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global mx_tolock
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global mx_locked
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function filter()
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{
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if (pid() != target())
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return 1
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return 0
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}
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probe library = process( %( $# > 0 %? @1 %: "/usr/lib/libvirt.so" %) )
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{
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if (filter()) next
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}
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probe lock = library.function("virMutexLock")
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{
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lockname = usymdata($m)
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}
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probe unlock = library.function("virMutexUnlock")
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{
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lockname = usymdata($m)
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}
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probe begin
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{
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%( $# > 1 %? println("error: Too many parameters"); exit();
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%: print("Started, press ^C when the process hangs\n"); %)
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}
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probe lock.call
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{
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mx_tolock[lockname, tid()] = sprint_usyms(ubacktrace())
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}
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probe lock.return
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{
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if ([lockname, tid()] in mx_tolock) {
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mx_locked[lockname, tid()] = mx_tolock[lockname, tid()]
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delete mx_tolock[lockname, tid()]
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} else {
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printf("internal error: lock acquired unwillingly?\n")
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}
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}
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probe unlock.call
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{
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found = 0
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foreach ([lock, tid] in mx_locked) {
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if (lock != lockname)
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continue
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if (tid != tid()) {
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printf("Warning: lock released on different thread that locked it.\n")
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printf("Lock trace:\n%s\n", mx_locked[lock, tid])
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printf("Unlock trace:\n%s\n", sprint_usyms(ubacktrace()))
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}
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found = tid
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break
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}
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if (found && [lockname, found] in mx_locked)
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delete mx_locked[lockname, found]
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}
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probe end
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{
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tmp = 0
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printf("\n=============\n")
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foreach (bt1 = [lock1, tid1] in mx_tolock) {
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deadlock = 0
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foreach (bt2 = [lock2, tid2] in mx_tolock) {
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if (lock1 == lock2) {
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if (!tmp++)
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printf("The following locks cannot be acquired:\n")
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if (!deadlock++)
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printf("Lock %s was locked in thread %d with this trace:\n%s\n",
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lock1, tid1, bt1)
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printf("and is waiting to be locked by thread %d here:\n%s\n",
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tid2, bt2)
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}
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}
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if (deadlock)
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printf("---\n")
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}
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if (!tmp)
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printf("No deadlocks found, sorry.\n")
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}
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