Dwarf tools interpret line number table pc's as start boundries instead of end boundries.

tests/standalone/dwarf_stack_trace_test.dart

+// Copyright (c) 2017, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+/// VMOptions=--dwarf-stack-traces
+
+import 'package:unittest/unittest.dart';
+import 'dart:io';
+
+bar() {
+  // Keep the 'throw' and its argument on separate lines.
+  throw
+  "Hello, Dwarf!";
+}
+
+foo() {
+  bar();
+}
+
+main() {
+  String rawStack;
+  try {
+    foo();
+  } catch (e, st) {
+    rawStack = st.toString();
+  }
+  print(rawStack);
+
+  if (Platform.isAndroid) {
+    // Attempts to execute 'file' etc fail with security exceptions on
+    // Android.
+    print("Skipping test on Android");
+    return;
+  }
+
+  ProcessResult result = Process.runSync("file", ["--version"]);
+  if (result.exitCode != 0) {
+    print("Skipping test because 'file' is not present");

[Cutch, 2017/03/22 14:04:37]

you should fail here and update the status file accordingly.

+    return;
+  }
+
+  result = Process.runSync("addr2line", ["--version"]);
+  if (result.exitCode != 0) {
+    print("Skipping test because 'addr2line' is not present");

[Cutch, 2017/03/22 14:04:37]

you should fail here and update the status file accordingly.

+    return;
+  }
+
+  result = Process.runSync("file", [Platform.script.toFilePath()]);
+  if (result.exitCode != 0) {
+    print(result.stdout);
+    print(result.stderr);
+    throw "'file' failed";
+    return;
+  }
+  if (!result.stdout.contains("shared object")) {
+    print("Skipping test because we are not running from a dylib");

[Cutch, 2017/03/22 14:04:37]

you should fail here and update the status file accordingly.

+    return;
+  }
+
+  var frameRegex = new RegExp("pc ([0-9a-z]+)  ([0-9a-zA-Z/\._]+)");
+  var symbolizedStack = new StringBuffer();
+  for (var frameMatch in frameRegex.allMatches(rawStack)) {
+    var framePC = frameMatch[1];
+    var frameDSO = frameMatch[2];
+    print(framePC);
+    print(frameDSO);
+    result = Process.runSync("addr2line",
+                             ["--exe", frameDSO,
+                              "--functions",
+                              "--inlines",
+                              framePC]);
+    if (result.exitCode != 0) {
+      print(result.stdout);
+      print(result.stderr);
+      throw "'addr2line' failed";
+    }
+    print(result.stdout);
+    symbolizedStack.write(result.stdout);
+  }
+
+  print(symbolizedStack);
+  var symbolizedLines = symbolizedStack.toString().split("\n");

[Cutch, 2017/03/22 14:04:37]

use stringContainsInOrder

expect(symbolizedStack.toString(), stringContainsInOrder([
'bar',
'dwarf_stack_trace_test.dart:12',
...
           ]));

[rmacnak, 2017/03/22 17:28:15]

Done.

+  expect(symbolizedLines.length, greaterThan(8));
+  expect(symbolizedLines[0], equals("bar"));
+  expect(symbolizedLines[1], endsWith("dwarf_stack_trace_test.dart:12"));
+  expect(symbolizedLines[2], equals("foo"));
+  expect(symbolizedLines[3], endsWith("dwarf_stack_trace_test.dart:17"));
+  expect(symbolizedLines[4], equals("main"));
+  expect(symbolizedLines[5], endsWith("dwarf_stack_trace_test.dart:23"));
+  expect(symbolizedLines[6], equals("main"));  // dispatcher
+  expect(symbolizedLines[7], endsWith("dwarf_stack_trace_test.dart:20"));
+}