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;
+  }
+
+  if (Platform.isMacOS) {
+    // addr2line is not part of the XCode command line tools.
+    print("Skipping test on MacOS");
+    return;
+  }
+
+  if (Platform.isWindows) {
+    // Lacks 'file' and 'addr2line'.
+    print("Skipping test on Windows");
+    return;
+  }
+
+  ProcessResult result = Process.runSync("file", ["--version"]);
+  if (result.exitCode != 0) {
+    print(result.stdout);
+    print(result.stderr);
+    throw "'file' is not present";
+  }
+
+  result = Process.runSync("addr2line", ["--version"]);
+  if (result.exitCode != 0) {
+    print(result.stdout);
+    print(result.stderr);
+    throw "'addr2line' is not present";
+  }
+
+  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");
+    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");
+  expect(symbolizedLines.length, greaterThan(8));
+  expect(symbolizedStack.toString(),
+         stringContainsInOrder(["bar",
+                                "dwarf_stack_trace_test.dart:12",
+                                "foo",
+                                "dwarf_stack_trace_test.dart:17",
+                                "main",
+                                "dwarf_stack_trace_test.dart:23",
+                                "main", // dispatcher
+                                "dwarf_stack_trace_test.dart:20"]));
+}