Add base to the repository.

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@8 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 89 insertions, 0 deletions

diff --git a/base/debug_on_start.cc b/base/debug_on_start.cc
new file mode 100644
index 0000000..7ae6cd1
--- /dev/null
+++ b/base/debug_on_start.cc
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+// Copyright 2008, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//    * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//    * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//    * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#include <windows.h>
+
+#include "base/debug_on_start.h"
+
+#include "base/base_switches.h"
+#include "base/basictypes.h"
+#include "base/debug_util.h"
+
+// Minimalist implementation to try to find a command line argument. We can use
+// kernel32 exported functions but not the CRT functions because we're too early
+// in the process startup.
+// The code is not that bright and will find things like ---argument or
+// /-/argument.
+// Note: command_line is non-destructively modified.
+bool DebugOnStart::FindArgument(wchar_t* command_line, const wchar_t* argument)
+{
+  int argument_len = lstrlen(argument);
+  int command_line_len = lstrlen(command_line);
+  while (command_line_len > argument_len) {
+    wchar_t first_char = command_line[0];
+    wchar_t last_char = command_line[argument_len+1];
+    // Try to find an argument.
+    if ((first_char == L'-' || first_char == L'/') &&
+        (last_char == L' ' || last_char == 0 || last_char == L'=')) {
+      command_line[argument_len+1] = 0;
+      // Skip the - or /
+      if (lstrcmpi(command_line+1, argument) == 0) {
+        // Found it.
+        command_line[argument_len+1] = last_char;
+        return true;
+      }
+      // Fix back.
+      command_line[argument_len+1] = last_char;
+    }
+    // Continue searching.
+    ++command_line;
+    --command_line_len;
+  }
+  return false;
+}
+
+// static
+int __cdecl DebugOnStart::Init() {
+  // Try to find the argument.
+  if (FindArgument(GetCommandLine(), switches::kDebugOnStart)) {
+    // We can do 2 things here:
+    // - Ask for a debugger to attach to us. This involve reading the registry
+    //   key and creating the process.
+    // - Do a int3.
+
+    // It will fails if we run in a sandbox. That is expected.
+    DebugUtil::SpawnDebuggerOnProcess(GetCurrentProcessId());
+
+    // Wait for a debugger to come take us.
+    DebugUtil::WaitForDebugger(60, false);
+  } else if (FindArgument(GetCommandLine(), switches::kWaitForDebugger)) {
+    // Wait for a debugger to come take us.
+    DebugUtil::WaitForDebugger(60, true);
+  }
+  return 0;
+}