From f4fe2e932cc8f445e9e1bc52863e11b669e3afc9 Mon Sep 17 00:00:00 2001
From: "Frank Ch. Eigler" <fche@elastic.org>
Date: Wed, 3 Mar 2010 00:28:22 -0500
Subject: PR11004: try / catch error-handling script syntax

* parse.h (try_block): New class.  Update basic visitors.
* staptree.cxx: Implement basic visitors.
* parse.cxx (expect_kw): Fix to actually look for keywords.
  (parse_try_block): New function.
  (lexer ctor): Designate 'try' and 'catch' as keywords.
* elaborate.cxx (dead_assignment_remover, dead_statmtexpr_remover): Optimize.
  (other visitors): Implement.
* translate.cxx (c_unparser): Implement via super-handy __local__ labels.
  (emit_probe, emit_function): Make outer out: label also __local__.
* testsuite/buildok/fortyone.stp, semko/fortynine.stp,
  systemtap.base/trycatch.exp: Test it.
* NEWS, doc/langref.txt, stap.1.in: Document it.
---
 testsuite/buildok/fortyone.stp        | 37 +++++++++++++++++++++++++++++++
 testsuite/semko/fortynine.stp         |  3 +++
 testsuite/systemtap.base/trycatch.exp | 41 +++++++++++++++++++++++++++++++++++
 3 files changed, 81 insertions(+)
 create mode 100755 testsuite/buildok/fortyone.stp
 create mode 100755 testsuite/semko/fortynine.stp
 create mode 100644 testsuite/systemtap.base/trycatch.exp

(limited to 'testsuite')

diff --git a/testsuite/buildok/fortyone.stp b/testsuite/buildok/fortyone.stp
new file mode 100755
index 00000000..7a1fceb8
--- /dev/null
+++ b/testsuite/buildok/fortyone.stp
@@ -0,0 +1,37 @@
+#! stap -p4
+
+# NB: also used for systemtap.base/trycatch.exp
+
+function foo () {
+  try { error("foo") println("KO 1") } catch { println("OK 1") error ("bar") }
+}
+
+function koo () {
+  try { println(1/(0*foo())) println("KO 2") } catch (er) { println("OK 2 ",er) error("baz") }
+}
+
+probe begin {
+  try { koo () println("KO 3") } catch { println("OK 3") }
+  try { /* empty */ } catch { log("KO 4") }
+  try { log("OK 4") } catch { /* empty */ }
+  try { /* empty */ } catch { /* empty */ }
+  println("OK 5")
+
+  // check for proper loop / try/catch nesting
+  for (i=0;i<5;i++) try { error("me") } catch { break }
+  println ((i==0) ? "OK 7" : "KO 7")
+
+  for (j=0;j<5;j++) { for (i=0;i<5;i++) try { break } catch { continue } }
+  println ((i==0 && j==5) ? "OK 7a" : "KO 7a")
+
+  for (i=0;i<5;i++) try { error("me") } catch { continue }
+  println ((i==5) ? "OK 8" : "KO 8")
+
+  for (j=0;j<5;j++) { for (i=0;i<5;i++) try { continue } catch { break } }
+  println ((i==5 && j==5) ? "OK 8a" : "KO 8a")
+
+  // check that MAXACTIONS cannot be bypassed, e.g. with nested catch {}'s
+  try { for (i=0; i<100000; i++) ; println("KO 6") } catch { println("KO 5") }
+  println("KO 6")
+  // will result in MAXACTION error
+}
diff --git a/testsuite/semko/fortynine.stp b/testsuite/semko/fortynine.stp
new file mode 100755
index 00000000..01e5bf49
--- /dev/null
+++ b/testsuite/semko/fortynine.stp
@@ -0,0 +1,3 @@
+#! stap -up2
+
+probe begin { try {} catch (er) {println(er+2)} }
diff --git a/testsuite/systemtap.base/trycatch.exp b/testsuite/systemtap.base/trycatch.exp
new file mode 100644
index 00000000..f0a133e2
--- /dev/null
+++ b/testsuite/systemtap.base/trycatch.exp
@@ -0,0 +1,41 @@
+set test "trycatch"
+
+if {! [installtest_p]} { untested $test; return }
+
+set ok 0
+set ko 0
+spawn stap $srcdir/buildok/fortyone.stp
+expect {
+    -timeout 30
+    -re {^ERROR: MAXACTION[^\r\n]*\r\n} { incr ok; exp_continue }
+    -re {^WARNING: Number of errors[^\r\n]*\r\n} { incr ok; exp_continue }
+    -re {^Pass 5: run failed[^\r\n]*\r\n} { incr ok; exp_continue }
+    -re {^OK[^\r\n]*\r\n} { incr ok; exp_continue }
+    -re {^KO[^\r\n]*\r\n} { incr ko; exp_continue }
+    timeout { fail "$test (timeout)" }
+    eof { }
+}
+wait; catch { close } 
+if {$ok == 12 && $ko == 0} then {pass $test} else {fail "$test ($ok $ko)"}
+
+
+set test "trycatch -u"
+
+set ok 0
+set ko 0
+spawn stap -u $srcdir/buildok/fortyone.stp
+expect {
+    -timeout 30
+    -re {^ERROR: MAXACTION[^\r\n]*\r\n} { incr ok; exp_continue }
+    -re {^WARNING: Number of errors[^\r\n]*\r\n} { incr ok; exp_continue }
+    -re {^Pass 5: run failed[^\r\n]*\r\n} { incr ok; exp_continue }
+    -re {^OK[^\r\n]*\r\n} { incr ok; exp_continue }
+    -re {^KO[^\r\n]*\r\n} { incr ko; exp_continue }
+    timeout { fail "$test (timeout)" }
+    eof { }
+}
+wait; catch { close } 
+if {$ok == 12 && $ko == 0} then {pass $test} else {fail "$test ($ok $ko)"}
+
+
+
-- 
cgit