2013-07-29 Caroline Tice <cmtice@google.com>

	* scripts/sum-vtv-counts.c: New. Summarize -fvtv-counts output log
	files.

2 files changed, 155 insertions, 0 deletions

diff --git a/libvtv/ChangeLog b/libvtv/ChangeLog
index 570c10189f5..49f89187837 100644
--- a/libvtv/ChangeLog
+++ b/libvtv/ChangeLog
@@ -1,3 +1,8 @@
+2013-07-29  Caroline Tice  <cmtice@google.com>
+
+	* scripts/sum-vtv-counts.c: New. Summarize -fvtv-counts output log
+	files.
+
 2013-07-29  Benjamin Kosnik  <bkoz@redhat.com>
 
 	* scripts/run-testsuite.sh (PASS_FAIL_TESTS): Comment out failing test.
diff --git a/libvtv/scripts/sum-vtv-counts.c b/libvtv/scripts/sum-vtv-counts.c
new file mode 100644
index 00000000000..fc99498e705
--- /dev/null
+++ b/libvtv/scripts/sum-vtv-counts.c
@@ -0,0 +1,150 @@
+/*
+This script sums up the counters for seeing how many virtual calls are
+actually being verified.  The flag for generating the count data is
+"-fvtv-counts".  This flag will generate two files in /tmp,
+"vtv_count_data.log" and "vtv_class_set_sizes.log".  The first file is
+the one that contains the info I mentioned; the second one is one I
+generated because I was curious about how big the average set size was
+for the vtable verification work.
+
+After compiling the attached program, run it on the vtv_count_data.log
+file:
+
+$ sum-counters /tmp/vtv_count_data.log
+
+One can optionally pass a "--verbose" flag.  This file generates an
+output file whose name is the same as the input file, with ".summary"
+appended to it, e.g. /tmp/vtv_count_data.log.summary .  Without the
+verbose flag, it will just contain something like this:
+
+Total # virtual calls: 349123
+Total # verified calls: 348236
+Percent verified: 99 %
+
+Total calls to __VLTRegisterSet: 42236
+Total calls to __VLTRegisterPair: 84371
+Total # unused vtable map vars: 1536333
+
+With the --verbose flag it will also output one line for each
+compilation unit for which it verified less than 90% of the virtual
+calls (and there were more than 20 virtual calls in the file),
+something like this:
+
+Verified 1 out of 25   (4.00%) :  foo.cc
+Verified 27 out of 43   (62.00%) : bar.cc
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+void
+usage (const char *error_text)
+{
+  fprintf (stderr, "%s", error_text);
+  fprintf (stderr, "Usage: \n");
+  fprintf (stderr, "sum-counters <input-file> [--verbose]\n");
+}
+
+int
+main (int argc, char **argv)
+{
+  FILE *fp_in = NULL;
+  FILE *fp_out = NULL;
+  int sum_vcalls = 0;
+  int sum_verified = 0;
+  int sum_regset = 0;
+  int sum_regpair = 0;
+  int sum_unused = 0;
+  char fname_in[1024];
+  char fname_out[1024];
+  int total;
+  int verified;
+  int regset;
+  int regpair;
+  int unused;
+  float pct;
+  char buffer[1024];
+  int verbose = 0;
+
+  if (argc < 2)
+    {
+      usage ("Error: Need an input file.\n");
+      return 1;
+    }
+
+  fp_in = fopen (argv[1], "r");
+  if (!fp_in)
+    {
+      snprintf (buffer, 1024, "Error: Unable to open input file '%s'.\n",
+		argv[1]);
+      usage (buffer);
+      return 1;
+    }
+
+  if (argc == 3)
+    {
+      if (strcmp (argv[2], "--verbose") == 0)
+	verbose = 1;
+      else
+	{
+	  snprintf (buffer, 1024, "Error: Unrecognized option '%s'.\n",
+		    argv[2]);
+	  usage (buffer);
+	  return 1;
+	}
+    }
+
+  snprintf (fname_out, 1024, "%s.summary", argv[1]);
+
+  fp_out = fopen (fname_out, "w");
+  if (!fp_out)
+    {
+      fprintf (stderr, "Error: Unable to open output file '%s'\n",
+	       fname_out);
+      return 1;
+    }
+
+  while (fscanf (fp_in, "%s %d %d %d %d %d\n", fname_in,  &total,
+		 &verified, &regset, &regpair, &unused) != EOF)
+    {
+      sum_vcalls += total;
+      sum_verified += verified;
+      sum_regset += regset;
+      sum_regpair += regpair;
+      sum_unused += unused;
+
+      float tmp_pct = 0.0;
+
+      if (total > 0)
+	tmp_pct = (verified * 100) / total;
+
+      if (verbose && tmp_pct < 90 && total >= 20)
+	{
+	  fprintf (fp_out, "Verified %d out of %d   (%.2f%%) : %s\n",
+		   verified, total, tmp_pct, fname_in);
+	}
+
+    }
+
+  fclose (fp_in);
+
+  fprintf (fp_out, "\n\n");
+  fprintf (fp_out, "Total # virtual calls: %d\n", sum_vcalls);
+  fprintf (fp_out, "Total # verified calls: %d\n", sum_verified);
+  if (sum_vcalls > 0)
+    fprintf (fp_out, "Percent verified: %d %%\n",
+	     sum_verified * 100 / sum_vcalls);
+  else
+    fprintf (fp_out, "Percent verified: NA %%\n");
+    
+  fprintf (fp_out, "\nTotal calls to __VLTRegisterSet: %d\n",
+	   sum_regset);
+  fprintf (fp_out, "Total calls to __VLTRegisterPair: %d\n",
+	   sum_regpair);
+  fprintf (fp_out, "Total # unused vtable map vars: %d\n", sum_unused);
+
+  fclose (fp_out);
+
+  return 0;
+}