Revert "Load /dev/linker/ld.config.txt by default"

This reverts commit 61a97e95052a4ff22c7d2315f00cb3f0a5bce99e.

Reason for revert: Breaks ART run-tests (b/143458513).

Test: Run ART tests on device in a chroot environment
Bug: 143458513
Bug: 139638519
Change-Id: Ib047a24d6e82e38ebdaafeab294b8be44b74bd9c

1 files changed, 24 insertions, 6 deletions

diff --git a/linker/linker.cpp b/linker/linker.cpp
index 3c30e73b3..dec575baf 100644
--- a/linker/linker.cpp
+++ b/linker/linker.cpp
@@ -92,6 +92,7 @@ static uint64_t g_module_unload_counter = 0;
 static const char* const kLdConfigArchFilePath = "/system/etc/ld.config." ABI_STRING ".txt";
 
 static const char* const kLdConfigFilePath = "/system/etc/ld.config.txt";
+static const char* const kLdConfigVndkLiteFilePath = "/system/etc/ld.config.vndk_lite.txt";
 
 static const char* const kLdGeneratedConfigFilePath = "/dev/linkerconfig/ld.config.txt";
 
@@ -4053,13 +4054,30 @@ static std::string get_ld_config_file_apex_path(const char* executable_path) {
 }
 
 static std::string get_ld_config_file_vndk_path() {
-  if (!file_exists(kLdGeneratedConfigFilePath)) {
-    DL_WARN("Warning: failed to find generated linker configuration from \"%s\"",
-            kLdGeneratedConfigFilePath);
-    return "";
+  if (android::base::GetBoolProperty("ro.vndk.lite", false)) {
+    return kLdConfigVndkLiteFilePath;
   }
 
-  return kLdGeneratedConfigFilePath;
+  // Use generated linker config if flag is set
+  // TODO(b/138920271) Do not check property once it is confirmed as stable
+  // TODO(b/139638519) This file should also cover legacy or vndk-lite config
+  if (android::base::GetProperty("ro.vndk.version", "") != "" &&
+      android::base::GetBoolProperty("sys.linker.use_generated_config", true)) {
+    if (file_exists(kLdGeneratedConfigFilePath)) {
+      return kLdGeneratedConfigFilePath;
+    } else {
+      DL_WARN("Warning: failed to find generated linker configuration from \"%s\"",
+              kLdGeneratedConfigFilePath);
+    }
+  }
+
+  std::string ld_config_file_vndk = kLdConfigFilePath;
+  size_t insert_pos = ld_config_file_vndk.find_last_of('.');
+  if (insert_pos == std::string::npos) {
+    insert_pos = ld_config_file_vndk.length();
+  }
+  ld_config_file_vndk.insert(insert_pos, Config::get_vndk_version_string('.'));
+  return ld_config_file_vndk;
 }
 
 static std::string get_ld_config_file_path(const char* executable_path) {
@@ -4087,7 +4105,7 @@ static std::string get_ld_config_file_path(const char* executable_path) {
   }
 
   path = get_ld_config_file_vndk_path();
-  if (!path.empty()) {
+  if (file_exists(path.c_str())) {
     return path;
   }