PR10279: add -DKRETACTIVE=nnnn parameter

* tapsets.cxx (dwarf/kprobe_derived_...::emit_decl/init): Define
  and use KRETPROBE instead of hard-coded max(...) values.  Raise
  the default 50%.
* testsuite/buildok/thirtytwo.stp: New test.

1 files changed, 10 insertions, 0 deletions

diff --git a/testsuite/buildok/thirtytwo.stp b/testsuite/buildok/thirtytwo.stp
new file mode 100755
index 00000000..d97aa50b
--- /dev/null
+++ b/testsuite/buildok/thirtytwo.stp
@@ -0,0 +1,10 @@
+#! /bin/sh
+
+stap -t -p4 -DKRETACTIVE=8888 -e '
+probe kprobe.function("sys_open").return {}
+probe kprobe.function("sys_open").return.maxactive(100) {}
+probe kernel.function("sys_open").return {}
+probe kernel.function("sys_open").return.maxactive(100) {}
+probe syscall.*.return {}
+'
+