Add support for copying coredumps to /tmp

tools/testing/dart/test_progress.dart

Index: tools/testing/dart/test_progress.dart
===================================================================
--- tools/testing/dart/test_progress.dart	(revision 32103)
+++ tools/testing/dart/test_progress.dart	(working copy)
@@ -276,6 +276,32 @@
   }
 }
 
+
+class UnexpectedCrashDumpArchiver extends EventListener {
+  void done(TestCase test) {
+    if (test.unexpectedOutput && test.result == Expectation.CRASH) {
+      var name = "core.dart.${test.lastCommandOutput.pid}";
+      var file = new File(name);
+      if (file.existsSync()) {
+        // Find the binary - we assume this is the first part of the command
+        var binName = test.lastCommandExecuted.toString().split(' ').first;
+        var binFile = new File(binName);
+        var binBaseName = new Path(binName).filename;
+        if (binFile.existsSync()) {
+          var tmpPath = new Path(Directory.systemTemp.path);
+          var dir = new Path(TestUtils.mkdirRecursive(tmpPath,
+              new Path('coredump_${test.lastCommandOutput.pid}')).path);
+          TestUtils.copyFile(new Path(name), dir.append(name));
+          TestUtils.copyFile(new Path(binName), dir.append(binBaseName));
+          print("\nCopied core dump and binary for unexpected crash to: "
+                "$dir");
+        }
+      }
+    }
+  }
+}
+
+
 class SummaryPrinter extends EventListener {
   void allTestsKnown() {
     if (SummaryReport.total > 0) {
@@ -284,6 +310,7 @@
   }
 }
 
+
 class TimingPrinter extends EventListener {
   final _command2testCases = new Map<Command, List<TestCase>>();
   final _commandOutputs = new Set<CommandOutput>();
@@ -456,6 +483,7 @@
   }
 }
 
+
 class TestFailurePrinter extends EventListener {
   bool _printSummary;
   var _formatter;