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android13/frameworks/native/opengl/libs/EGL/Loader.cpp

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/*
** Copyright 2007, The Android Open Source Project
**
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
**
** http://www.apache.org/licenses/LICENSE-2.0
**
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*/
//#define LOG_NDEBUG 0
#define ATRACE_TAG ATRACE_TAG_GRAPHICS
#include "EGL/Loader.h"
#include <android-base/properties.h>
#include <android/dlext.h>
#include <dirent.h>
#include <dlfcn.h>
#include <graphicsenv/GraphicsEnv.h>
#include <log/log.h>
#include <utils/Timers.h>
#include <vndksupport/linker.h>
#include <string>
#include "EGL/eglext_angle.h"
#include "egl_platform_entries.h"
#include "egl_trace.h"
#include "egldefs.h"
namespace android {
/*
* EGL userspace drivers must be provided either:
* - as a single library:
* /vendor/lib/egl/libGLES.so
*
* - as separate libraries:
* /vendor/lib/egl/libEGL.so
* /vendor/lib/egl/libGLESv1_CM.so
* /vendor/lib/egl/libGLESv2.so
*
* For backward compatibility and to facilitate the transition to
* this new naming scheme, the loader will additionally look for:
*
* /{vendor|system}/lib/egl/lib{GLES | [EGL|GLESv1_CM|GLESv2]}_*.so
*
*/
Loader& Loader::getInstance() {
static Loader loader;
return loader;
}
static void* do_dlopen(const char* path, int mode) {
ATRACE_CALL();
return dlopen(path, mode);
}
static void* do_android_dlopen_ext(const char* path, int mode, const android_dlextinfo* info) {
ATRACE_CALL();
return android_dlopen_ext(path, mode, info);
}
static void* do_android_load_sphal_library(const char* path, int mode) {
ATRACE_CALL();
return android_load_sphal_library(path, mode);
}
static int do_android_unload_sphal_library(void* dso) {
ATRACE_CALL();
return android_unload_sphal_library(dso);
}
Loader::driver_t::driver_t(void* gles)
{
dso[0] = gles;
for (size_t i=1 ; i<NELEM(dso) ; i++)
dso[i] = nullptr;
}
Loader::driver_t::~driver_t()
{
for (size_t i=0 ; i<NELEM(dso) ; i++) {
if (dso[i]) {
dlclose(dso[i]);
dso[i] = nullptr;
}
}
}
int Loader::driver_t::set(void* hnd, int32_t api)
{
switch (api) {
case EGL:
dso[0] = hnd;
break;
case GLESv1_CM:
dso[1] = hnd;
break;
case GLESv2:
dso[2] = hnd;
break;
default:
return -EOVERFLOW;
}
return 0;
}
Loader::Loader()
: getProcAddress(nullptr)
{
}
Loader::~Loader() {
}
static void* load_wrapper(const char* path) {
void* so = do_dlopen(path, RTLD_NOW | RTLD_LOCAL);
ALOGE_IF(!so, "dlopen(\"%s\") failed: %s", path, dlerror());
return so;
}
#ifndef EGL_WRAPPER_DIR
#if defined(__LP64__)
#define EGL_WRAPPER_DIR "/system/lib64"
#else
#define EGL_WRAPPER_DIR "/system/lib"
#endif
#endif
static const char* DRIVER_SUFFIX_PROPERTY = "ro.hardware.egl";
static const char* HAL_SUBNAME_KEY_PROPERTIES[2] = {
DRIVER_SUFFIX_PROPERTY,
"ro.board.platform",
};
static bool should_unload_system_driver(egl_connection_t* cnx) {
// Return false if the system driver has been unloaded once.
if (cnx->systemDriverUnloaded) {
return false;
}
// Return true if Angle namespace is set.
android_namespace_t* ns = android::GraphicsEnv::getInstance().getAngleNamespace();
if (ns) {
return true;
}
// Return true if updated driver namespace is set.
ns = android::GraphicsEnv::getInstance().getDriverNamespace();
if (ns) {
return true;
}
return false;
}
static void uninit_api(char const* const* api, __eglMustCastToProperFunctionPointerType* curr) {
while (*api) {
*curr++ = nullptr;
api++;
}
}
void Loader::unload_system_driver(egl_connection_t* cnx) {
ATRACE_CALL();
uninit_api(gl_names,
(__eglMustCastToProperFunctionPointerType*)&cnx
->hooks[egl_connection_t::GLESv2_INDEX]
->gl);
uninit_api(gl_names,
(__eglMustCastToProperFunctionPointerType*)&cnx
->hooks[egl_connection_t::GLESv1_INDEX]
->gl);
uninit_api(egl_names, (__eglMustCastToProperFunctionPointerType*)&cnx->egl);
if (cnx->dso) {
ALOGD("Unload system gl driver.");
driver_t* hnd = (driver_t*)cnx->dso;
if (hnd->dso[2]) {
do_android_unload_sphal_library(hnd->dso[2]);
}
if (hnd->dso[1]) {
do_android_unload_sphal_library(hnd->dso[1]);
}
if (hnd->dso[0]) {
do_android_unload_sphal_library(hnd->dso[0]);
}
cnx->dso = nullptr;
}
cnx->systemDriverUnloaded = true;
}
void* Loader::open(egl_connection_t* cnx)
{
ATRACE_CALL();
const nsecs_t openTime = systemTime();
if (should_unload_system_driver(cnx)) {
unload_system_driver(cnx);
}
// If a driver has been loaded, return the driver directly.
if (cnx->dso) {
return cnx->dso;
}
// Firstly, try to load ANGLE driver.
driver_t* hnd = attempt_to_load_angle(cnx);
if (!hnd) {
// Secondly, try to load from driver apk.
hnd = attempt_to_load_updated_driver(cnx);
}
bool failToLoadFromDriverSuffixProperty = false;
if (!hnd) {
// If updated driver apk is set but fail to load, abort here.
if (android::GraphicsEnv::getInstance().getDriverNamespace()) {
LOG_ALWAYS_FATAL("couldn't find an OpenGL ES implementation from %s",
android::GraphicsEnv::getInstance().getDriverPath().c_str());
}
// Finally, try to load system driver, start by searching for the library name appended by
// the system properties of the GLES userspace driver in both locations.
// i.e.:
// libGLES_${prop}.so, or:
// libEGL_${prop}.so, libGLESv1_CM_${prop}.so, libGLESv2_${prop}.so
for (auto key : HAL_SUBNAME_KEY_PROPERTIES) {
auto prop = base::GetProperty(key, "");
if (prop.empty()) {
continue;
}
hnd = attempt_to_load_system_driver(cnx, prop.c_str(), true);
if (hnd) {
break;
} else if (strcmp(key, DRIVER_SUFFIX_PROPERTY) == 0) {
failToLoadFromDriverSuffixProperty = true;
}
}
}
if (!hnd) {
// Can't find graphics driver by appending system properties, now search for the exact name
// without any suffix of the GLES userspace driver in both locations.
// i.e.:
// libGLES.so, or:
// libEGL.so, libGLESv1_CM.so, libGLESv2.so
hnd = attempt_to_load_system_driver(cnx, nullptr, true);
}
if (!hnd && !failToLoadFromDriverSuffixProperty) {
hnd = attempt_to_load_system_driver(cnx, nullptr, false);
}
if (!hnd) {
android::GraphicsEnv::getInstance().setDriverLoaded(android::GpuStatsInfo::Api::API_GL,
false, systemTime() - openTime);
} else {
// init_angle_backend will check if loaded driver is ANGLE or not,
// will set cnx->useAngle appropriately.
// Do this here so that we use ANGLE path when driver is ANGLE (e.g. loaded as native),
// not just loading ANGLE as option.
init_angle_backend(hnd->dso[2], cnx);
}
LOG_ALWAYS_FATAL_IF(!hnd,
"couldn't find an OpenGL ES implementation, make sure you set %s or %s",
HAL_SUBNAME_KEY_PROPERTIES[0], HAL_SUBNAME_KEY_PROPERTIES[1]);
if (!cnx->libEgl) {
cnx->libEgl = load_wrapper(EGL_WRAPPER_DIR "/libEGL.so");
}
if (!cnx->libGles1) {
cnx->libGles1 = load_wrapper(EGL_WRAPPER_DIR "/libGLESv1_CM.so");
}
if (!cnx->libGles2) {
cnx->libGles2 = load_wrapper(EGL_WRAPPER_DIR "/libGLESv2.so");
}
if (!cnx->libEgl || !cnx->libGles2 || !cnx->libGles1) {
android::GraphicsEnv::getInstance().setDriverLoaded(android::GpuStatsInfo::Api::API_GL,
false, systemTime() - openTime);
}
LOG_ALWAYS_FATAL_IF(!cnx->libEgl,
"couldn't load system EGL wrapper libraries");
LOG_ALWAYS_FATAL_IF(!cnx->libGles2 || !cnx->libGles1,
"couldn't load system OpenGL ES wrapper libraries");
android::GraphicsEnv::getInstance().setDriverLoaded(android::GpuStatsInfo::Api::API_GL, true,
systemTime() - openTime);
return (void*)hnd;
}
void Loader::close(egl_connection_t* cnx)
{
driver_t* hnd = (driver_t*) cnx->dso;
delete hnd;
cnx->dso = nullptr;
cnx->useAngle = false;
}
void Loader::init_api(void* dso,
char const * const * api,
char const * const * ref_api,
__eglMustCastToProperFunctionPointerType* curr,
getProcAddressType getProcAddress)
{
ATRACE_CALL();
const ssize_t SIZE = 256;
char scrap[SIZE];
while (*api) {
char const * name = *api;
if (ref_api) {
char const * ref_name = *ref_api;
if (std::strcmp(name, ref_name) != 0) {
*curr++ = nullptr;
ref_api++;
continue;
}
}
__eglMustCastToProperFunctionPointerType f =
(__eglMustCastToProperFunctionPointerType)dlsym(dso, name);
if (f == nullptr) {
// couldn't find the entry-point, use eglGetProcAddress()
f = getProcAddress(name);
}
if (f == nullptr) {
// Try without the OES postfix
ssize_t index = ssize_t(strlen(name)) - 3;
if ((index>0 && (index<SIZE-1)) && (!strcmp(name+index, "OES"))) {
strncpy(scrap, name, index);
scrap[index] = 0;
f = (__eglMustCastToProperFunctionPointerType)dlsym(dso, scrap);
//ALOGD_IF(f, "found <%s> instead", scrap);
}
}
if (f == nullptr) {
// Try with the OES postfix
ssize_t index = ssize_t(strlen(name)) - 3;
if (index>0 && strcmp(name+index, "OES")) {
snprintf(scrap, SIZE, "%sOES", name);
f = (__eglMustCastToProperFunctionPointerType)dlsym(dso, scrap);
//ALOGD_IF(f, "found <%s> instead", scrap);
}
}
if (f == nullptr) {
//ALOGD("%s", name);
f = (__eglMustCastToProperFunctionPointerType)gl_unimplemented;
/*
* GL_EXT_debug_marker is special, we always report it as
* supported, it's handled by GLES_trace. If GLES_trace is not
* enabled, then these are no-ops.
*/
if (!strcmp(name, "glInsertEventMarkerEXT")) {
f = (__eglMustCastToProperFunctionPointerType)gl_noop;
} else if (!strcmp(name, "glPushGroupMarkerEXT")) {
f = (__eglMustCastToProperFunctionPointerType)gl_noop;
} else if (!strcmp(name, "glPopGroupMarkerEXT")) {
f = (__eglMustCastToProperFunctionPointerType)gl_noop;
}
}
*curr++ = f;
api++;
if (ref_api) ref_api++;
}
}
static void* load_system_driver(const char* kind, const char* suffix, const bool exact) {
ATRACE_CALL();
class MatchFile {
public:
static std::string find(const char* libraryName, const bool exact) {
const char* const searchPaths[] = {
#if defined(__LP64__)
"/vendor/lib64/egl",
"/system/lib64/egl"
#else
"/vendor/lib/egl",
"/system/lib/egl"
#endif
};
for (auto dir : searchPaths) {
std::string absolutePath;
if (find(absolutePath, libraryName, dir, exact)) {
return absolutePath;
}
}
// Driver not found. gah.
return std::string();
}
private:
static bool find(std::string& result,
const std::string& pattern, const char* const search, bool exact) {
if (exact) {
std::string absolutePath = std::string(search) + "/" + pattern + ".so";
if (!access(absolutePath.c_str(), R_OK)) {
result = absolutePath;
return true;
}
return false;
}
DIR* d = opendir(search);
if (d != nullptr) {
struct dirent* e;
while ((e = readdir(d)) != nullptr) {
if (e->d_type == DT_DIR) {
continue;
}
if (!strcmp(e->d_name, "libGLES_android.so")) {
// always skip the software renderer
continue;
}
if (strstr(e->d_name, pattern.c_str()) == e->d_name) {
if (!strcmp(e->d_name + strlen(e->d_name) - 3, ".so")) {
result = std::string(search) + "/" + e->d_name;
closedir(d);
return true;
}
}
}
closedir(d);
}
return false;
}
};
std::string libraryName = std::string("lib") + kind;
if (suffix) {
libraryName += std::string("_") + suffix;
} else if (!exact) {
// Deprecated: we look for files that match
// libGLES_*.so, or:
// libEGL_*.so, libGLESv1_CM_*.so, libGLESv2_*.so
libraryName += std::string("_");
}
std::string absolutePath = MatchFile::find(libraryName.c_str(), exact);
if (absolutePath.empty()) {
// this happens often, we don't want to log an error
return nullptr;
}
const char* const driver_absolute_path = absolutePath.c_str();
// Try to load drivers from the 'sphal' namespace, if it exist. Fall back to
// the original routine when the namespace does not exist.
// See /system/core/rootdir/etc/ld.config.txt for the configuration of the
// sphal namespace.
void* dso = do_android_load_sphal_library(driver_absolute_path,
RTLD_NOW | RTLD_LOCAL);
if (dso == nullptr) {
const char* err = dlerror();
ALOGE("load_driver(%s): %s", driver_absolute_path, err ? err : "unknown");
return nullptr;
}
ALOGD("loaded %s", driver_absolute_path);
return dso;
}
static void* load_angle(const char* kind, android_namespace_t* ns) {
const android_dlextinfo dlextinfo = {
.flags = ANDROID_DLEXT_USE_NAMESPACE,
.library_namespace = ns,
};
std::string name = std::string("lib") + kind + "_angle.so";
void* so = do_android_dlopen_ext(name.c_str(), RTLD_LOCAL | RTLD_NOW, &dlextinfo);
if (so) {
ALOGD("dlopen_ext from APK (%s) success at %p", name.c_str(), so);
return so;
} else {
ALOGE("dlopen_ext(\"%s\") failed: %s", name.c_str(), dlerror());
}
return nullptr;
}
static void* load_updated_driver(const char* kind, android_namespace_t* ns) {
ATRACE_CALL();
const android_dlextinfo dlextinfo = {
.flags = ANDROID_DLEXT_USE_NAMESPACE,
.library_namespace = ns,
};
void* so = nullptr;
for (auto key : HAL_SUBNAME_KEY_PROPERTIES) {
auto prop = base::GetProperty(key, "");
if (prop.empty()) {
continue;
}
std::string name = std::string("lib") + kind + "_" + prop + ".so";
so = do_android_dlopen_ext(name.c_str(), RTLD_LOCAL | RTLD_NOW, &dlextinfo);
if (so) {
return so;
}
ALOGE("Could not load %s from updatable gfx driver namespace: %s.", name.c_str(),
dlerror());
}
return nullptr;
}
Loader::driver_t* Loader::attempt_to_load_angle(egl_connection_t* cnx) {
ATRACE_CALL();
if (!android::GraphicsEnv::getInstance().shouldUseAngle()) {
return nullptr;
}
android_namespace_t* ns = android::GraphicsEnv::getInstance().getAngleNamespace();
if (!ns) {
return nullptr;
}
android::GraphicsEnv::getInstance().setDriverToLoad(android::GpuStatsInfo::Driver::ANGLE);
driver_t* hnd = nullptr;
// ANGLE doesn't ship with GLES library, and thus we skip GLES driver.
void* dso = load_angle("EGL", ns);
if (dso) {
initialize_api(dso, cnx, EGL);
hnd = new driver_t(dso);
dso = load_angle("GLESv1_CM", ns);
initialize_api(dso, cnx, GLESv1_CM);
hnd->set(dso, GLESv1_CM);
dso = load_angle("GLESv2", ns);
initialize_api(dso, cnx, GLESv2);
hnd->set(dso, GLESv2);
}
return hnd;
}
void Loader::init_angle_backend(void* dso, egl_connection_t* cnx) {
void* pANGLEGetDisplayPlatform = dlsym(dso, "ANGLEGetDisplayPlatform");
if (pANGLEGetDisplayPlatform) {
ALOGV("ANGLE GLES library in use");
cnx->useAngle = true;
} else {
ALOGV("Native GLES library in use");
cnx->useAngle = false;
}
}
Loader::driver_t* Loader::attempt_to_load_updated_driver(egl_connection_t* cnx) {
ATRACE_CALL();
android_namespace_t* ns = android::GraphicsEnv::getInstance().getDriverNamespace();
if (!ns) {
return nullptr;
}
ALOGD("Load updated gl driver.");
android::GraphicsEnv::getInstance().setDriverToLoad(android::GpuStatsInfo::Driver::GL_UPDATED);
driver_t* hnd = nullptr;
void* dso = load_updated_driver("GLES", ns);
if (dso) {
initialize_api(dso, cnx, EGL | GLESv1_CM | GLESv2);
hnd = new driver_t(dso);
return hnd;
}
dso = load_updated_driver("EGL", ns);
if (dso) {
initialize_api(dso, cnx, EGL);
hnd = new driver_t(dso);
dso = load_updated_driver("GLESv1_CM", ns);
initialize_api(dso, cnx, GLESv1_CM);
hnd->set(dso, GLESv1_CM);
dso = load_updated_driver("GLESv2", ns);
initialize_api(dso, cnx, GLESv2);
hnd->set(dso, GLESv2);
}
return hnd;
}
Loader::driver_t* Loader::attempt_to_load_system_driver(egl_connection_t* cnx, const char* suffix,
const bool exact) {
ATRACE_CALL();
android::GraphicsEnv::getInstance().setDriverToLoad(android::GpuStatsInfo::Driver::GL);
driver_t* hnd = nullptr;
void* dso = load_system_driver("GLES", suffix, exact);
if (dso) {
initialize_api(dso, cnx, EGL | GLESv1_CM | GLESv2);
hnd = new driver_t(dso);
return hnd;
}
dso = load_system_driver("EGL", suffix, exact);
if (dso) {
initialize_api(dso, cnx, EGL);
hnd = new driver_t(dso);
dso = load_system_driver("GLESv1_CM", suffix, exact);
initialize_api(dso, cnx, GLESv1_CM);
hnd->set(dso, GLESv1_CM);
dso = load_system_driver("GLESv2", suffix, exact);
initialize_api(dso, cnx, GLESv2);
hnd->set(dso, GLESv2);
}
return hnd;
}
void Loader::initialize_api(void* dso, egl_connection_t* cnx, uint32_t mask) {
if (mask & EGL) {
getProcAddress = (getProcAddressType)dlsym(dso, "eglGetProcAddress");
ALOGE_IF(!getProcAddress,
"can't find eglGetProcAddress() in EGL driver library");
egl_t* egl = &cnx->egl;
__eglMustCastToProperFunctionPointerType* curr =
(__eglMustCastToProperFunctionPointerType*)egl;
char const * const * api = egl_names;
while (*api) {
char const * name = *api;
__eglMustCastToProperFunctionPointerType f =
(__eglMustCastToProperFunctionPointerType)dlsym(dso, name);
if (f == nullptr) {
// couldn't find the entry-point, use eglGetProcAddress()
f = getProcAddress(name);
if (f == nullptr) {
f = (__eglMustCastToProperFunctionPointerType)nullptr;
}
}
*curr++ = f;
api++;
}
}
if (mask & GLESv1_CM) {
init_api(dso, gl_names_1, gl_names,
(__eglMustCastToProperFunctionPointerType*)
&cnx->hooks[egl_connection_t::GLESv1_INDEX]->gl,
getProcAddress);
}
if (mask & GLESv2) {
init_api(dso, gl_names, nullptr,
(__eglMustCastToProperFunctionPointerType*)
&cnx->hooks[egl_connection_t::GLESv2_INDEX]->gl,
getProcAddress);
}
}
} // namespace android
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