Merge to XFA:Fix heap use after free in CPDFSDK_Annot::GetPDFAnnot.

testing/embedder_test.cpp

Index: testing/embedder_test.cpp
diff --git a/testing/embedder_test.cpp b/testing/embedder_test.cpp
index d62810d0871ece5fbd64aaeaf6fddbd9806873b2..151987fbb298dea2c4131c25f2235badbe49786b 100644
--- a/testing/embedder_test.cpp
+++ b/testing/embedder_test.cpp
@@ -232,6 +232,7 @@ bool EmbedderTest::OpenDocument(const std::string& filename) {
   formfillinfo->version = 1;
   formfillinfo->FFI_SetTimer = SetTimerTrampoline;
   formfillinfo->FFI_KillTimer = KillTimerTrampoline;
+  formfillinfo->FFI_GetPage = GetPageTrampoline;
   formfillinfo->m_pJsPlatform = platform;
 
   form_handle_ = FPDFDOC_InitFormFillEnvironment(document_, formfillinfo);
@@ -270,6 +271,15 @@ FPDF_PAGE EmbedderTest::LoadPage(int page_number) {
   return page;
 }
 
+FPDF_PAGE EmbedderTest::LoadAndCachePage(int page_number) {
+  FPDF_PAGE page = delegate_->GetPage(form_handle_, document_, page_number);
+  if (!page) {
+    return nullptr;
+  }
+  FORM_DoPageAAction(page, form_handle_, FPDFPAGE_AACTION_OPEN);
+  return page;
+}
+
 FPDF_BITMAP EmbedderTest::RenderPage(FPDF_PAGE page) {
   int width = static_cast<int>(FPDF_GetPageWidth(page));
   int height = static_cast<int>(FPDF_GetPageHeight(page));
@@ -286,6 +296,22 @@ void EmbedderTest::UnloadPage(FPDF_PAGE page) {
   FPDF_ClosePage(page);
 }
 
+FPDF_PAGE EmbedderTest::Delegate::GetPage(FPDF_FORMHANDLE form_handle,
+                                          FPDF_DOCUMENT document,
+                                          int page_index) {
+  auto it = m_pageMap.find(page_index);
+  if (it != m_pageMap.end()) {
+    return it->second;
+  }
+  FPDF_PAGE page = FPDF_LoadPage(document, page_index);
+  if (!page) {
+    return nullptr;
+  }
+  m_pageMap[page_index] = page;
+  FORM_OnAfterLoadPage(page, form_handle);
+  return page;
+}
+
 // static
 void EmbedderTest::UnsupportedHandlerTrampoline(UNSUPPORT_INFO* info,
                                                 int type) {
@@ -317,6 +343,14 @@ void EmbedderTest::KillTimerTrampoline(FPDF_FORMFILLINFO* info, int id) {
   return test->delegate_->KillTimer(id);
 }
 
+// static
+FPDF_PAGE EmbedderTest::GetPageTrampoline(FPDF_FORMFILLINFO* info,
+                                          FPDF_DOCUMENT document,
+                                          int page_index) {
+  EmbedderTest* test = static_cast<EmbedderTest*>(info);
+  return test->delegate_->GetPage(test->m_pFormfillinfo, document, page_index);
+}
+
 // Can't use gtest-provided main since we need to stash the path to the
 // executable in order to find the external V8 binary data files.
 int main(int argc, char** argv) {