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Merge "Revert "Allow dlopen("/system/lib/<soname>") for pre-Q""

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vichang 2019-02-06 17:03:41 +00:00 committed by Gerrit Code Review
parent 3f8bdb216c 1906e77665
commit 73ee7a6320
1 changed files with 14 additions and 77 deletions
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91
linker/linker.cpp
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@ -91,21 +91,19 @@ static const char* const kLdConfigFilePath = "/system/etc/ld.config.txt";
static const char* const kLdConfigVndkLiteFilePath = "/system/etc/ld.config.vndk_lite.txt";
#if defined(__LP64__)
static const char* const kSystemLibDir = "/system/lib64";
static const char* const kOdmLibDir = "/odm/lib64";
static const char* const kVendorLibDir = "/vendor/lib64";
static const char* const kAsanSystemLibDir = "/data/asan/system/lib64";
static const char* const kAsanOdmLibDir = "/data/asan/odm/lib64";
static const char* const kAsanVendorLibDir = "/data/asan/vendor/lib64";
static const char* const kRuntimeApexLibDir = "/apex/com.android.runtime/lib64";
static const char* const kSystemLibDir = "/system/lib64";
static const char* const kOdmLibDir = "/odm/lib64";
static const char* const kVendorLibDir = "/vendor/lib64";
static const char* const kAsanSystemLibDir = "/data/asan/system/lib64";
static const char* const kAsanOdmLibDir = "/data/asan/odm/lib64";
static const char* const kAsanVendorLibDir = "/data/asan/vendor/lib64";
#else
static const char* const kSystemLibDir = "/system/lib";
static const char* const kOdmLibDir = "/odm/lib";
static const char* const kVendorLibDir = "/vendor/lib";
static const char* const kAsanSystemLibDir = "/data/asan/system/lib";
static const char* const kAsanOdmLibDir = "/data/asan/odm/lib";
static const char* const kAsanVendorLibDir = "/data/asan/vendor/lib";
static const char* const kRuntimeApexLibDir = "/apex/com.android.runtime/lib";
static const char* const kSystemLibDir = "/system/lib";
static const char* const kOdmLibDir = "/odm/lib";
static const char* const kVendorLibDir = "/vendor/lib";
static const char* const kAsanSystemLibDir = "/data/asan/system/lib";
static const char* const kAsanOdmLibDir = "/data/asan/odm/lib";
static const char* const kAsanVendorLibDir = "/data/asan/vendor/lib";
#endif
static const char* const kAsanLibDirPrefix = "/data/asan";
@ -230,44 +228,6 @@ static bool is_greylisted(android_namespace_t* ns, const char* name, const soinf
}
// END OF WORKAROUND
// 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
*/
static bool translateSystemPathToApexPath(const char* name, std::string* out_name_to_apex) {
static const char* const kSystemToRuntimeApexLibs[] = {
"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() >= __ANDROID_API_Q__) {
return false;
}
// If the path is not absolute, or isn't /system/lib, there's nothing to do.
if (name[0] != '/' || dirname(name).compare(kSystemLibDir) != 0) {
return false;
}
const char* base_name = basename(name);
for (const char* soname : kSystemToRuntimeApexLibs) {
if (strcmp(base_name, soname) == 0) {
*out_name_to_apex = std::string(kRuntimeApexLibDir) + "/" + base_name;
return true;
}
}
return false;
}
// End Workaround for dlopen(/system/lib/<soname>) when .so is in /apex.
static std::vector<std::string> g_ld_preload_names;
static bool g_anonymous_namespace_initialized;
@ -2114,14 +2074,13 @@ void* do_dlopen(const char* name, int flags,
android_namespace_t* ns = get_caller_namespace(caller);
LD_LOG(kLogDlopen,
"dlopen(name=\"%s\", flags=0x%x, extinfo=%s, caller=\"%s\", caller_ns=%s@%p, targetSdkVersion=%i) ...",
"dlopen(name=\"%s\", flags=0x%x, extinfo=%s, caller=\"%s\", caller_ns=%s@%p) ...",
name,
flags,
android_dlextinfo_to_string(extinfo).c_str(),
caller == nullptr ? "(null)" : caller->get_realpath(),
ns == nullptr ? "(null)" : ns->get_name(),
ns,
get_application_target_sdk_version());
ns);
auto purge_guard = android::base::make_scope_guard([&]() { purge_unused_memory(); });
@ -2155,28 +2114,6 @@ void* do_dlopen(const char* name, int flags,
}
}
// Workaround for dlopen(/system/lib/<soname>) when .so is in /apex. http://b/121248172
// The workaround works only when targetSdkVersion < Q.
std::string name_to_apex;
if (translateSystemPathToApexPath(name, &name_to_apex)) {
const char* new_name = name_to_apex.c_str();
LD_LOG(kLogDlopen, "dlopen translating path to /apex: name=%s newName=%s",
name,
new_name);
// Some APEXs could be optionally disabled. Only translate the path
// when the old file is absent and the new file exists.
if (file_exists(name)) {
LD_LOG(kLogDlopen, "dlopen failed to translate path to /apex: /system file exists. %s", name);
} else if (!file_exists(new_name)) {
LD_LOG(kLogDlopen, "dlopen failed to translate path to /apex: /apex file does not exist. %s",
new_name);
} else {
LD_LOG(kLogDlopen, "dlopen new path to /apex: newName=%s", new_name);
name = new_name;
}
}
// End Workaround for dlopen(/system/lib/<soname>) when .so is in /apex.
std::string asan_name_holder;
const char* translated_name = name;