1 files changed, 57 insertions, 0 deletions
diff --git a/js/src/jit/x86-shared/AssemblerBuffer-x86-shared.cpp b/js/src/jit/x86-shared/AssemblerBuffer-x86-shared.cpp
new file mode 100644
index 0000000000..835d7755c9
--- /dev/null
+++ b/js/src/jit/x86-shared/AssemblerBuffer-x86-shared.cpp
@@ -0,0 +1,57 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: set ts=8 sts=2 et sw=2 tw=80:
+ * 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/. */
+
+#include "jit/x86-shared/AssemblerBuffer-x86-shared.h"
+
+#include "mozilla/Sprintf.h"
+
+using namespace js;
+using namespace jit;
+
+bool AssemblerBuffer::swap(Vector<uint8_t, 0, SystemAllocPolicy>& bytes) {
+  // For now, specialize to the one use case.
+  MOZ_ASSERT(bytes.empty());
+
+  if (m_buffer.empty()) {
+    if (bytes.capacity() > m_buffer.capacity()) {
+      size_t newCapacity = bytes.capacity();
+      uint8_t* newBuffer = bytes.extractRawBuffer();
+      MOZ_ASSERT(newBuffer);
+      m_buffer.replaceRawBuffer((unsigned char*)newBuffer, 0, newCapacity);
+    }
+    return true;
+  }
+
+  size_t newLength = m_buffer.length();
+  size_t newCapacity = m_buffer.capacity();
+  unsigned char* newBuffer = m_buffer.extractRawBuffer();
+
+  // NB: extractRawBuffer() only returns null if the Vector is using
+  // inline storage and thus a malloc would be needed. In this case,
+  // just make a simple copy.
+  if (!newBuffer) {
+    return bytes.append(m_buffer.begin(), m_buffer.end());
+  }
+
+  bytes.replaceRawBuffer((uint8_t*)newBuffer, newLength, newCapacity);
+  return true;
+}
+
+#ifdef JS_JITSPEW
+void js::jit::GenericAssembler::spew(const char* fmt, va_list va) {
+  // Buffer to hold the formatted string. Note that this may contain
+  // '%' characters, so do not pass it directly to printf functions.
+  char buf[200];
+
+  int i = VsprintfLiteral(buf, fmt, va);
+  if (i > -1) {
+    if (printer) {
+      printer->printf("%s\n", buf);
+    }
+    js::jit::JitSpew(js::jit::JitSpew_Codegen, "%s", buf);
+  }
+}
+#endif