Revert "Remove CheckDexSupport check."

This reverts commit 7cb7fd05e3e02c0473fda317c11080e21bfa882e.

Reason for revert: libdex_support lib does actually dlopen real library.

Bug: 191276623
Change-Id: Ie47f17999c70ca9e61f380b879ea70452b2e0895

1 files changed, 10 insertions, 1 deletions

diff --git a/libunwindstack/DexFile.cpp b/libunwindstack/DexFile.cpp
index 15a814d..e576354 100644
--- a/libunwindstack/DexFile.cpp
+++ b/libunwindstack/DexFile.cpp
@@ -39,6 +39,14 @@ namespace unwindstack {
 std::map<DexFile::MappedFileKey, std::weak_ptr<DexFile::DexFileApi>> DexFile::g_mapped_dex_files;
 std::mutex DexFile::g_lock;
 
+static bool CheckDexSupport() {
+  if (std::string err_msg; !art_api::dex::TryLoadLibdexfile(&err_msg)) {
+    ALOGW("Failed to initialize DEX file support: %s", err_msg.c_str());
+    return false;
+  }
+  return true;
+}
+
 std::shared_ptr<DexFile> DexFile::CreateFromDisk(uint64_t addr, uint64_t size, MapInfo* map) {
   if (map == nullptr || map->name().empty()) {
     return nullptr;  // MapInfo not backed by file.
@@ -77,7 +85,8 @@ std::shared_ptr<DexFile> DexFile::CreateFromDisk(uint64_t addr, uint64_t size, M
 
 std::shared_ptr<DexFile> DexFile::Create(uint64_t base_addr, uint64_t file_size, Memory* memory,
                                          MapInfo* info) {
-  if (file_size == 0) {
+  static bool has_dex_support = CheckDexSupport();
+  if (!has_dex_support || file_size == 0) {
     return nullptr;
   }