[DTrace-devel] [PATCH 27/38] test: Fix the speculative tests that checked bufsize

[eugene.loh at oracle.com]

From: Eugene Loh <eugene.loh at oracle.com>

Ever since speculations were reimplemented, these tests simply were
not testing what they claimed to test.  Among other things:

1)  There is a simple dependence on bufsize that is independent of
speculations.  So speculations have no special role in bufsize tests.

2)  The messages in the print statements were not taxing bufsize.
(A single default string would be enough to exhaust 60 bytes, but
the producer wasn't passing the consumer these strings at all.
The bufsize is being set by the implicit ERROR probe.)

3)  The various size ranges described in the comments do not exist
and were not being tested anyhow.

So remove these tests, and just rely on the other bufsize tests.

To be fair, there seemed to have been no other "negative bufsize"
test, but add a more straightforward such test and add it to where
the other bufsize tests are.

Signed-off-by: Eugene Loh <eugene.loh at oracle.com>
---
 test/unittest/options/err.bufsize-negative.d  | 24 +++++++
 test/unittest/options/err.bufsize-negative.r  |  2 +
 .../speculation/err.BufSizeVariations1.d      | 67 -------------------
 .../speculation/err.BufSizeVariations2.d      | 67 -------------------
 .../speculation/err.NegativeBufSize.d         | 67 -------------------
 .../speculation/err.NegativeBufSize.r         |  2 -
 6 files changed, 26 insertions(+), 203 deletions(-)
 create mode 100644 test/unittest/options/err.bufsize-negative.d
 create mode 100644 test/unittest/options/err.bufsize-negative.r
 delete mode 100644 test/unittest/speculation/err.BufSizeVariations1.d
 delete mode 100644 test/unittest/speculation/err.BufSizeVariations2.d
 delete mode 100644 test/unittest/speculation/err.NegativeBufSize.d
 delete mode 100644 test/unittest/speculation/err.NegativeBufSize.r

diff --git a/test/unittest/options/err.bufsize-negative.d b/test/unittest/options/err.bufsize-negative.d
new file mode 100644
index 00000000..ac194dc8
--- /dev/null
+++ b/test/unittest/options/err.bufsize-negative.d
@@ -0,0 +1,24 @@
+/*
+ * Oracle Linux DTrace.
+ * Copyright (c) 2024, Oracle and/or its affiliates. All rights reserved.
+ * Licensed under the Universal Permissive License v 1.0 as shown at
+ * http://oss.oracle.com/licenses/upl.
+ */
+
+/*
+ * ASSERTION: The -xbufsize option sets the trace buffer size.
+ *
+ * SECTION: Options and Tunables/Consumer Options
+ */
+
+/* @@runtest-opts: -xbufsize=-1 */
+
+BEGIN
+{
+	exit(0);
+}
+
+ERROR
+{
+	exit(1);
+}
diff --git a/test/unittest/options/err.bufsize-negative.r b/test/unittest/options/err.bufsize-negative.r
new file mode 100644
index 00000000..ea3089e9
--- /dev/null
+++ b/test/unittest/options/err.bufsize-negative.r
@@ -0,0 +1,2 @@
+-- @@stderr --
+dtrace: failed to set -x bufsize: Invalid value for specified option
diff --git a/test/unittest/speculation/err.BufSizeVariations1.d b/test/unittest/speculation/err.BufSizeVariations1.d
deleted file mode 100644
index c6e29b78..00000000
--- a/test/unittest/speculation/err.BufSizeVariations1.d
+++ /dev/null
@@ -1,67 +0,0 @@
-/*
- * Oracle Linux DTrace.
- * Copyright (c) 2006, Oracle and/or its affiliates. All rights reserved.
- * Licensed under the Universal Permissive License v 1.0 as shown at
- * http://oss.oracle.com/licenses/upl.
- */
-
-/*
- * ASSERTION:
- * Verify the behavior of variations in bufsize.
- *
- * SECTION: Speculative Tracing/Options and Tuning;
- *	Options and Tunables/bufsize
- *
- * NOTES: This test behaves differently depending on the values
- * assigned to bufsize.
- * 1. 0 > bufsize.
- * 2. 0 == bufsize.
- * 3. 0 < bufsize <= 7
- * 4. 8 <= bufsize <= 31
- * 5. 32 <= bufsize <= 47
- * 6. 48 <= bufsize <= 71
- * 7. 72 <= bufsize
- */
-
-#pragma D option quiet
-#pragma D option bufsize=41
-
-BEGIN
-{
-	self->speculateFlag = 0;
-	self->commitFlag = 0;
-	self->spec = speculation();
-	printf("Speculative buffer ID: %d\n", self->spec);
-}
-
-BEGIN
-{
-	speculate(self->spec);
-	printf("Lots of data\n");
-	printf("Has to be crammed into this buffer\n");
-	printf("Until it overflows\n");
-	printf("And causes flops\n");
-	self->speculateFlag++;
-
-}
-
-BEGIN
-/1 <= self->speculateFlag/
-{
-	commit(self->spec);
-	self->commitFlag++;
-}
-
-BEGIN
-/1 <= self->commitFlag/
-{
-	printf("Statement was executed\n");
-	exit(0);
-}
-
-BEGIN
-/1 > self->commitFlag/
-{
-	printf("Statement wasn't executed\n");
-	exit(1);
-}
diff --git a/test/unittest/speculation/err.BufSizeVariations2.d b/test/unittest/speculation/err.BufSizeVariations2.d
deleted file mode 100644
index 8094cd0b..00000000
--- a/test/unittest/speculation/err.BufSizeVariations2.d
+++ /dev/null
@@ -1,67 +0,0 @@
-/*
- * Oracle Linux DTrace.
- * Copyright (c) 2006, Oracle and/or its affiliates. All rights reserved.
- * Licensed under the Universal Permissive License v 1.0 as shown at
- * http://oss.oracle.com/licenses/upl.
- */
-
-/*
- * ASSERTION:
- * Verify the behavior of variations in bufsize.
- *
- * SECTION: Speculative Tracing/Options and Tuning;
- *	    Options and Tunables/bufsize
- *
- * NOTES: This test behaves differently depending on the values
- * assigned to bufsize.
- * 1. 0 > bufsize.
- * 2. 0 == bufsize.
- * 3. 0 < bufsize <= 7
- * 4. 8 <= bufsize <= 31
- * 5. 32 <= bufsize <= 47
- * 6. 48 <= bufsize <= 71
- * 7. 72 <= bufsize
- */
-
-#pragma D option quiet
-#pragma D option bufsize=4
-
-BEGIN
-{
-	self->speculateFlag = 0;
-	self->commitFlag = 0;
-	self->spec = speculation();
-	printf("Speculative buffer ID: %d\n", self->spec);
-}
-
-BEGIN
-{
-	speculate(self->spec);
-	printf("Lots of data\n");
-	printf("Has to be crammed into this buffer\n");
-	printf("Until it overflows\n");
-	printf("And causes flops\n");
-	self->speculateFlag++;
-
-}
-
-BEGIN
-/1 <= self->speculateFlag/
-{
-	commit(self->spec);
-	self->commitFlag++;
-}
-
-BEGIN
-/1 <= self->commitFlag/
-{
-	printf("Statement was executed\n");
-	exit(0);
-}
-
-BEGIN
-/1 > self->commitFlag/
-{
-	printf("Statement wasn't executed\n");
-	exit(1);
-}
diff --git a/test/unittest/speculation/err.NegativeBufSize.d b/test/unittest/speculation/err.NegativeBufSize.d
deleted file mode 100644
index a0154ccb..00000000
--- a/test/unittest/speculation/err.NegativeBufSize.d
+++ /dev/null
@@ -1,67 +0,0 @@
-/*
- * Oracle Linux DTrace.
- * Copyright (c) 2006, Oracle and/or its affiliates. All rights reserved.
- * Licensed under the Universal Permissive License v 1.0 as shown at
- * http://oss.oracle.com/licenses/upl.
- */
-
-/*
- * ASSERTION:
- * Verify the behavior of variations in bufsize.
- *
- * SECTION: Speculative Tracing/Options and Tuning;
- *	Options and Tunables/bufsize
- *
- * NOTES: This test behaves differently depending on the values
- * assigned to bufsize.
- * 1. 0 > bufsize.
- * 2. 0 == bufsize.
- * 3. 0 < bufsize <= 7
- * 4. 8 <= bufsize <= 31
- * 5. 32 <= bufsize <= 47
- * 6. 48 <= bufsize <= 71
- * 7. 72 <= bufsize
- */
-
-#pragma D option quiet
-#pragma D option bufsize=-72
-
-BEGIN
-{
-	self->speculateFlag = 0;
-	self->commitFlag = 0;
-	self->spec = speculation();
-	printf("Speculative buffer ID: %d\n", self->spec);
-}
-
-BEGIN
-{
-	speculate(self->spec);
-	printf("Lots of data\n");
-	printf("Has to be crammed into this buffer\n");
-	printf("Until it overflows\n");
-	printf("And causes flops\n");
-	self->speculateFlag++;
-
-}
-
-BEGIN
-/1 <= self->speculateFlag/
-{
-	commit(self->spec);
-	self->commitFlag++;
-}
-
-BEGIN
-/1 <= self->commitFlag/
-{
-	printf("Statement was executed\n");
-	exit(0);
-}
-
-BEGIN
-/1 > self->commitFlag/
-{
-	printf("Statement wasn't executed\n");
-	exit(1);
-}
diff --git a/test/unittest/speculation/err.NegativeBufSize.r b/test/unittest/speculation/err.NegativeBufSize.r
deleted file mode 100644
index 9d7be6c0..00000000
--- a/test/unittest/speculation/err.NegativeBufSize.r
+++ /dev/null
@@ -1,2 +0,0 @@
--- @@stderr --
-dtrace: failed to compile script test/unittest/speculation/err.NegativeBufSize.d: line 27: failed to set option 'bufsize' to '-72': Invalid value for specified option
-- 
2.18.4