Copy translateSystemPathToApexPath to linker_translate_path.cpp

Bug: http://b/156397945

Test: m

Merged-In: I33f11b8a6a41475b6cdd65e1ff49b2084c33b197
Change-Id: I33f11b8a6a41475b6cdd65e1ff49b2084c33b197
(cherry picked from commit d15229df76e78337532c19d42c01b2c51db8f2f1)

1 files changed, 77 insertions, 0 deletions

diff --git a/linker/linker_translate_path.cpp b/linker/linker_translate_path.cpp
new file mode 100644
index 000000000..df7d0aabe
--- /dev/null
+++ b/linker/linker_translate_path.cpp
@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ * 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.
+ *
+ * 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 "linker.h"
+#include "linker_translate_path.h"
+#include "linker_utils.h"
+
+#if defined(__LP64__)
+static const char* const kSystemLibDir        = "/system/lib64";
+static const char* const kI18nApexLibDir      = "/apex/com.android.i18n/lib64";
+#else
+static const char* const kSystemLibDir        = "/system/lib";
+static const char* const kI18nApexLibDir      = "/apex/com.android.i18n/lib";
+#endif
+
+// Workaround for dlopen(/system/lib(64)/<soname>) when .so is in /apex. http://b/121248172
+/**
+ * Translate /system path to /apex path if needed
+ * The workaround should work only when targetSdkVersion < Q.
+ *
+ * param out_name_to_apex pointing to /apex path
+ * return true if translation is needed
+ */
+bool translateSystemPathToApexPath(const char* name, std::string* out_name_to_apex) {
+  static const char* const kSystemToArtApexLibs[] = {
+      "libicuuc.so",
+      "libicui18n.so",
+  };
+  // New mapping for new apex should be added below
+
+  // Nothing to do if target sdk version is Q or above
+  if (get_application_target_sdk_version() >= 29) {
+    return false;
+  }
+
+  // If the path isn't /system/lib, there's nothing to do.
+  if (name == nullptr || dirname(name) != kSystemLibDir) {
+    return false;
+  }
+
+  const char* base_name = basename(name);
+
+  for (const char* soname : kSystemToArtApexLibs) {
+    if (strcmp(base_name, soname) == 0) {
+      *out_name_to_apex = std::string(kI18nApexLibDir) + "/" + base_name;
+      return true;
+    }
+  }
+
+  return false;
+}
+// End Workaround for dlopen(/system/lib/<soname>) when .so is in /apex.