2 files changed, 76 insertions, 0 deletions
diff --git a/testing/tools/minidumpwriter/minidumpwriter.cpp b/testing/tools/minidumpwriter/minidumpwriter.cpp
new file mode 100644
index 0000000000..e70ed08a91
--- /dev/null
+++ b/testing/tools/minidumpwriter/minidumpwriter.cpp
@@ -0,0 +1,57 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ * Given a PID and a path to a target file, write a minidump of the
+ * corresponding process in that file. This is taken more or less
+ * verbatim from mozcrash and translated to C++ to avoid problems
+ * writing a minidump of 64 bit Firefox from a 32 bit python.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <windows.h>
+#include <dbghelp.h>
+
+int wmain(int argc, wchar_t** argv) {
+  if (argc != 3) {
+    fprintf(stderr, "Usage: minidumpwriter <PID> <DUMP_FILE>\n");
+    return 1;
+  }
+
+  DWORD pid = (DWORD)_wtoi(argv[1]);
+
+  if (pid <= 0) {
+    fprintf(stderr, "Usage: minidumpwriter <PID> <DUMP_FILE>\n");
+    return 1;
+  }
+
+  wchar_t* dumpfile = argv[2];
+  int rv = 1;
+  HANDLE hProcess =
+      OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, 0, pid);
+  if (!hProcess) {
+    fprintf(stderr, "Couldn't get handle for %lu\n", pid);
+    return rv;
+  }
+
+  HANDLE file = CreateFileW(dumpfile, GENERIC_WRITE, 0, nullptr, CREATE_ALWAYS,
+                            FILE_ATTRIBUTE_NORMAL, nullptr);
+  if (file == INVALID_HANDLE_VALUE) {
+    fprintf(stderr, "Couldn't open dump file at %S\n", dumpfile);
+    CloseHandle(hProcess);
+    return rv;
+  }
+
+  rv = 0;
+  if (!MiniDumpWriteDump(hProcess, pid, file, MiniDumpNormal, nullptr, nullptr,
+                         nullptr)) {
+    fprintf(stderr, "Error 0x%lX in MiniDumpWriteDump\n", GetLastError());
+    rv = 1;
+  }
+
+  CloseHandle(file);
+  CloseHandle(hProcess);
+  return rv;
+}
diff --git a/testing/tools/minidumpwriter/moz.build b/testing/tools/minidumpwriter/moz.build
new file mode 100644
index 0000000000..7528da9430
--- /dev/null
+++ b/testing/tools/minidumpwriter/moz.build
@@ -0,0 +1,19 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+if CONFIG["ENABLE_TESTS"] and CONFIG["OS_ARCH"] == "WINNT":
+    Program("minidumpwriter")
+    OS_LIBS += [
+        "dbghelp",
+    ]
+    SOURCES += [
+        "minidumpwriter.cpp",
+    ]
+    USE_STATIC_LIBS = True
+    if CONFIG["CC_TYPE"] in ("clang", "gcc"):
+        WIN32_EXE_LDFLAGS += ["-municode"]
+
+NO_PGO = True