Changes to how script coverage integrates with test suites.

- BRO_PROFILER_FILE now passes .X* templated filenames to mkstemp
  for generating unique coverage state files.  All test suites
  now use this so each Bro instance writes to a unique coverage file.
- Rearranging Makefile targets.  The general rule is that if the
  all/brief target fails out due to a test failure, then the dependent
  coverage target won't run, but can still be invoked directly later.
  (e.g. make brief || make coverage)

src/Brofiler.cc

@@ -1,4 +1,5 @@
 #include <cstdio>
+#include <cstring>
 #include <utility>
 #include <algorithm>
 #include "Brofiler.h"
@@ -48,7 +49,38 @@ bool Brofiler::WriteStats()
 	char* bf = getenv("BRO_PROFILER_FILE");
 	if ( ! bf ) return false;
 
-	FILE* f = fopen(bf, "w");
+	bool gen_unique = false;
+	const char* p = strstr(bf, ".X");
+	if ( p )
+		{
+		gen_unique = true;
+		while ( *(++p) )
+			{
+			if ( *p != 'X' )
+				{
+				gen_unique = false;
+				break;
+				}
+			}
+		}
+
+	FILE* f;
+
+	if ( gen_unique )
+		{
+		int fd = mkstemp(bf);
+		if ( fd == -1 )
+			{
+			reporter->Error("Failed to generate unique file name from BRO_PROFILER_FILE: %s\n", bf);
+			return false;
+			}
+		f = fdopen(fd, "w");
+		}
+	else
+		{
+		f = fopen(bf, "w");
+		}
+
 	if ( ! f )
 		{
 		reporter->Error("Failed to open BRO_PROFILER_FILE destination '%s' for writing\n", bf);

src/Brofiler.h

@@ -26,7 +26,9 @@ public:
 	/**
 	 * Combines usage stats from current run with any read from ReadStats(),
 	 * then writes information to file pointed to by environment variable
-	 * BRO_PROFILER_FILE.
+	 * BRO_PROFILER_FILE.  If the value of that env. variable ends with
+	 * ".XXXX" (any amount of X's), then it is first passed through mkstemp
+	 * to get a unique file.
 	 *
 	 * @return: true when usage info is written, otherwise false.
 	 */

testing/Makefile

@@ -12,6 +12,7 @@ make-brief:
 	@for repo in $(DIRS); do (cd $$repo && make brief ); done
 
 coverage:
+	@for repo in $(DIRS); do (cd $$repo && echo "Coverage for '$$repo' dir:" && make coverage); done
 	@test -f btest/coverage.log && cp btest/coverage.log `mktemp brocov.tmp.XXX` || true
 	@for f in external/*/coverage.log; do test -f $$f && cp $$f `mktemp brocov.tmp.XXX` || true; done
 	@echo "Complete test suite code coverage:"

testing/btest/Makefile

@@ -2,16 +2,23 @@
 DIAG=diag.log
 BTEST=../../aux/btest/btest
 
-all: cleanup
+all: cleanup btest-verbose coverage
-    # Showing all tests.
-	@$(BTEST) -f $(DIAG)
-	@../scripts/coverage-calc ".tmp/script-coverage*" coverage.log `pwd`/../../scripts
 
-brief: cleanup
+# Showing all tests.
-    # Brief output showing only failed tests.
+btest-verbose:
+	@$(BTEST) -f $(DIAG)
+
+brief: cleanup btest-brief coverage
+
+# Brief output showing only failed tests.
+btest-brief:
 	@$(BTEST) -b -f $(DIAG)
+
+coverage:
 	@../scripts/coverage-calc ".tmp/script-coverage*" coverage.log `pwd`/../../scripts
 
 cleanup:
 	@rm -f $(DIAG)
 	@rm -f .tmp/script-coverage*
+
+.PHONY: all btest-verbose brief btest-brief coverage cleanup

testing/btest/btest.cfg

@@ -18,4 +18,4 @@ DIST=%(testbase)s/../..
 BUILD=%(testbase)s/../../build
 TEST_DIFF_CANONIFIER=$SCRIPTS/diff-canonifier
 TMPDIR=%(testbase)s/.tmp
-BRO_PROFILER_FILE=%(testbase)s/.tmp/script-coverage
+BRO_PROFILER_FILE=%(testbase)s/.tmp/script-coverage.XXXX

testing/external/Makefile

@@ -24,3 +24,7 @@ push:
 status:
 	@for repo in $(REPOS); do ( cd $$repo && echo '>>' $$repo && git status -bs && echo ); done
 
+coverage:
+	@for repo in $(REPOS); do (cd $$repo && echo "Coverage for '$$repo' repo:" && make coverage); done
+
+.PHONY: all brief init pull push status coverage

testing/external/subdir-btest.cfg

@@ -17,4 +17,4 @@ TRACES=%(testbase)s/Traces
 SCRIPTS=%(testbase)s/../scripts
 DIST=%(testbase)s/../../..
 BUILD=%(testbase)s/../../../build
-BRO_PROFILER_FILE=%(testbase)s/.tmp/script-coverage
+BRO_PROFILER_FILE=%(testbase)s/.tmp/script-coverage.XXXX

testing/scripts/btest-bg-run

@@ -1,7 +0,0 @@
-#! /usr/bin/env bash
-
-# This is a wrapper script to btest's real btest-bg-run.  It's used
-# when collecting Bro script coverage statistics so that two independent
-# Bro processing don't try to write those usage statistics to the same file.
-
-BRO_PROFILER_FILE=`mktemp $TMPDIR/script-coverage.XXXX` $BTEST_PATH/btest-bg-run $@