PR11208: glue adjacent string literals together.

* parse.cxx (lexer::scan): Glue adjacent strings together.
* testsuite/parseko/twentyseven.stp, semok/thirtyfive.stp: New tests.

4 files changed, 37 insertions, 2 deletions

diff --git a/NEWS b/NEWS
index 82aa205f..8d9fe2bf 100644
--- a/NEWS
+++ b/NEWS
@@ -1,9 +1,18 @@
 * What's new
+
+- Adjacent string literals are glued together, making this
+  construct valid:
+     probe process("/usr" @1 "/bin").function("*") { ... }
+
 - In order to limit potential impact from future security problems, 
   the stap-server process does not permit its being launched as root.
 
-- New : systemtap now supports probes for Hardware Breakpoints on x86
-  and x86_64. For syntax details, see man page for stapprobes.
+- On recent kernels, for some architectures/configurations, hardware
+  breakpoint probes are supported.  The probe point syntax is:
+
+     probe kernel.data(ADDRESS).write
+     probe kernel.data(ADDRESS).length(LEN).write
+     probe kernel.data("SYMBOL_NAME").write
 
 * What's new in version 1.1
 
diff --git a/parse.cxx b/parse.cxx
index ad4f93f0..f99a440b 100644
--- a/parse.cxx
+++ b/parse.cxx
@@ -885,6 +885,7 @@ skip:
   else if (c == '\"')
     {
       n->type = tok_string;
+    another_string:
       while (1)
 	{
 	  c = input_get ();
@@ -924,6 +925,19 @@ skip:
 	  else
 	    n->content.push_back(c);
 	}
+      // PR11208: check if the next token is also a string literal; auto-concatenate it
+      // This is complicated to the extent that we need to skip intermediate whitespace.
+      // XXX: but not comments
+      unsigned nspace = 0;
+      do {
+        c = input_peek(nspace++);
+        if (c == '\"') // new string literal?
+          {
+            // consume all whitespace plus the opening quote
+            while (nspace-- > 0) input_get();
+            goto another_string; // and append the rest to this token
+          }
+      } while (isspace(c));
       return n;
     }
 
diff --git a/testsuite/parseko/twentyseven.stp b/testsuite/parseko/twentyseven.stp
new file mode 100755
index 00000000..39c9224a
--- /dev/null
+++ b/testsuite/parseko/twentyseven.stp
@@ -0,0 +1,4 @@
+#! stap -p1
+
+# PR 11208
+probe kernel.function ("sys_" /* this comment prevents string gluing */ "open") {}
diff --git a/testsuite/semok/thirtyfive.stp b/testsuite/semok/thirtyfive.stp
new file mode 100755
index 00000000..325c90fb
--- /dev/null
+++ b/testsuite/semok/thirtyfive.stp
@@ -0,0 +1,8 @@
+#! stap -p2
+
+// PR11208
+probe kernel.function("sys""_""open") {}
+probe kernel.function("sys" "_" "close") {}
+probe kernel.function("p"
+		"a" "n" "i"
+	       	"c") {}