mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-12-07 13:24:12 +00:00
5be768776b
SprintfLiteral is much nicer, and placates the clang plugin as well.
581 lines
17 KiB
C++
581 lines
17 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/*
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* This custom library loading code is only meant to be called
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* during initialization. As a result, it takes no special
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* precautions to be threadsafe. Any of the library loading functions
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* like mozload should not be available to other code.
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*/
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#include <jni.h>
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#include <android/log.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/mman.h>
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#include <sys/limits.h>
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#include <errno.h>
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#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <zlib.h>
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#include "dlfcn.h"
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#include "APKOpen.h"
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#include <sys/time.h>
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#include <sys/syscall.h>
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#include <sys/resource.h>
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#include <sys/prctl.h>
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#include "sqlite3.h"
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#include "SQLiteBridge.h"
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#include "NSSBridge.h"
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#include "ElfLoader.h"
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#include "application.ini.h"
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#include "mozilla/arm.h"
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#include "mozilla/Bootstrap.h"
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#include "mozilla/Sprintf.h"
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#include "mozilla/TimeStamp.h"
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#include "mozilla/UniquePtr.h"
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#include "XREChildData.h"
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/* Android headers don't define RUSAGE_THREAD */
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#ifndef RUSAGE_THREAD
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#define RUSAGE_THREAD 1
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#endif
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#ifndef RELEASE_OR_BETA
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/* Official builds have the debuggable flag set to false, which disables
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* the backtrace dumper from bionic. However, as it is useful for native
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* crashes happening before the crash reporter is registered, re-enable
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* it on non release builds (i.e. nightly and aurora).
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* Using a constructor so that it is re-enabled as soon as libmozglue.so
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* is loaded.
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*/
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__attribute__((constructor))
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void make_dumpable() {
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prctl(PR_SET_DUMPABLE, 1);
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}
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#endif
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typedef int mozglueresult;
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enum StartupEvent {
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#define mozilla_StartupTimeline_Event(ev, z) ev,
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#include "StartupTimeline.h"
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#undef mozilla_StartupTimeline_Event
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MAX_STARTUP_EVENT_ID
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};
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using namespace mozilla;
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static const int MAX_MAPPING_INFO = 32;
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static mapping_info lib_mapping[MAX_MAPPING_INFO];
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APKOPEN_EXPORT const struct mapping_info *
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getLibraryMapping()
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{
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return lib_mapping;
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}
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void
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JNI_Throw(JNIEnv* jenv, const char* classname, const char* msg)
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{
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__android_log_print(ANDROID_LOG_ERROR, "GeckoLibLoad", "Throw\n");
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jclass cls = jenv->FindClass(classname);
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if (cls == nullptr) {
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__android_log_print(ANDROID_LOG_ERROR, "GeckoLibLoad", "Couldn't find exception class (or exception pending) %s\n", classname);
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exit(FAILURE);
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}
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int rc = jenv->ThrowNew(cls, msg);
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if (rc < 0) {
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__android_log_print(ANDROID_LOG_ERROR, "GeckoLibLoad", "Error throwing exception %s\n", msg);
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exit(FAILURE);
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}
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jenv->DeleteLocalRef(cls);
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}
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namespace {
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JavaVM* sJavaVM;
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}
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void
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abortThroughJava(const char* msg)
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{
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struct sigaction sigact = {};
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if (SEGVHandler::__wrap_sigaction(SIGSEGV, nullptr, &sigact)) {
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return; // sigaction call failed.
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}
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Dl_info info = {};
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if ((sigact.sa_flags & SA_SIGINFO) &&
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__wrap_dladdr(reinterpret_cast<void*>(sigact.sa_sigaction), &info) &&
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info.dli_fname && strstr(info.dli_fname, "libxul.so")) {
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return; // Existing signal handler is in libxul (i.e. we have crash reporter).
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}
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JNIEnv* env = nullptr;
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if (!sJavaVM || sJavaVM->AttachCurrentThreadAsDaemon(&env, nullptr) != JNI_OK) {
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return;
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}
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if (!env || env->PushLocalFrame(2) != JNI_OK) {
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return;
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}
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jclass loader = env->FindClass("org/mozilla/gecko/mozglue/GeckoLoader");
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if (!loader) {
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return;
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}
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jmethodID method = env->GetStaticMethodID(loader, "abort", "(Ljava/lang/String;)V");
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jstring str = env->NewStringUTF(msg);
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if (method && str) {
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env->CallStaticVoidMethod(loader, method, str);
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}
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env->PopLocalFrame(nullptr);
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}
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Bootstrap::UniquePtr gBootstrap;
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#ifndef MOZ_FOLD_LIBS
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static void * sqlite_handle = nullptr;
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static void * nspr_handle = nullptr;
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static void * plc_handle = nullptr;
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#else
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#define sqlite_handle nss_handle
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#define nspr_handle nss_handle
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#define plc_handle nss_handle
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#endif
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static void * nss_handle = nullptr;
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static int mapping_count = 0;
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extern "C" void
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report_mapping(char *name, void *base, uint32_t len, uint32_t offset)
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{
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if (mapping_count >= MAX_MAPPING_INFO)
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return;
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struct mapping_info *info = &lib_mapping[mapping_count++];
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info->name = strdup(name);
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info->base = (uintptr_t)base;
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info->len = len;
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info->offset = offset;
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}
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extern "C" void
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delete_mapping(const char *name)
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{
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for (int pos = 0; pos < mapping_count; ++pos) {
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struct mapping_info *info = &lib_mapping[pos];
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if (!strcmp(info->name, name)) {
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struct mapping_info *last = &lib_mapping[mapping_count - 1];
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free(info->name);
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*info = *last;
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--mapping_count;
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break;
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}
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}
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}
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static UniquePtr<char[]>
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getAPKLibraryName(const char* apkName, const char* libraryName)
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{
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#define APK_ASSETS_PATH "!/assets/" ANDROID_CPU_ARCH "/"
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size_t filenameLength = strlen(apkName) +
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sizeof(APK_ASSETS_PATH) + // includes \0 terminator
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strlen(libraryName);
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auto file = MakeUnique<char[]>(filenameLength);
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snprintf(file.get(), filenameLength, "%s" APK_ASSETS_PATH "%s",
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apkName, libraryName);
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return file;
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#undef APK_ASSETS_PATH
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}
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static void*
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dlopenAPKLibrary(const char* apkName, const char* libraryName)
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{
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return __wrap_dlopen(getAPKLibraryName(apkName, libraryName).get(), RTLD_GLOBAL | RTLD_LAZY);
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}
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static mozglueresult
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loadGeckoLibs(const char *apkName)
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{
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TimeStamp t0 = TimeStamp::Now();
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struct rusage usage1_thread, usage1;
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getrusage(RUSAGE_THREAD, &usage1_thread);
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getrusage(RUSAGE_SELF, &usage1);
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gBootstrap = GetBootstrap(getAPKLibraryName(apkName, "libxul.so").get());
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if (!gBootstrap) {
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__android_log_print(ANDROID_LOG_ERROR, "GeckoLibLoad", "Couldn't get a handle to libxul!");
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return FAILURE;
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}
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TimeStamp t1 = TimeStamp::Now();
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struct rusage usage2_thread, usage2;
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getrusage(RUSAGE_THREAD, &usage2_thread);
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getrusage(RUSAGE_SELF, &usage2);
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#define RUSAGE_TIMEDIFF(u1, u2, field) \
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((u2.ru_ ## field.tv_sec - u1.ru_ ## field.tv_sec) * 1000 + \
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(u2.ru_ ## field.tv_usec - u1.ru_ ## field.tv_usec) / 1000)
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__android_log_print(ANDROID_LOG_ERROR, "GeckoLibLoad", "Loaded libs in %fms total, %ldms(%ldms) user, %ldms(%ldms) system, %ld(%ld) faults",
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(t1 - t0).ToMilliseconds(),
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RUSAGE_TIMEDIFF(usage1_thread, usage2_thread, utime),
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RUSAGE_TIMEDIFF(usage1, usage2, utime),
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RUSAGE_TIMEDIFF(usage1_thread, usage2_thread, stime),
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RUSAGE_TIMEDIFF(usage1, usage2, stime),
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usage2_thread.ru_majflt - usage1_thread.ru_majflt,
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usage2.ru_majflt - usage1.ru_majflt);
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gBootstrap->XRE_StartupTimelineRecord(LINKER_INITIALIZED, t0);
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gBootstrap->XRE_StartupTimelineRecord(LIBRARIES_LOADED, t1);
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return SUCCESS;
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}
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static mozglueresult loadNSSLibs(const char *apkName);
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static mozglueresult
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loadSQLiteLibs(const char *apkName)
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{
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if (sqlite_handle)
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return SUCCESS;
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#ifdef MOZ_FOLD_LIBS
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if (loadNSSLibs(apkName) != SUCCESS)
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return FAILURE;
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#else
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sqlite_handle = dlopenAPKLibrary(apkName, "libmozsqlite3.so");
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if (!sqlite_handle) {
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__android_log_print(ANDROID_LOG_ERROR, "GeckoLibLoad", "Couldn't get a handle to libmozsqlite3!");
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return FAILURE;
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}
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#endif
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setup_sqlite_functions(sqlite_handle);
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return SUCCESS;
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}
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static mozglueresult
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loadNSSLibs(const char *apkName)
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{
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if (nss_handle && nspr_handle && plc_handle)
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return SUCCESS;
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nss_handle = dlopenAPKLibrary(apkName, "libnss3.so");
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#ifndef MOZ_FOLD_LIBS
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nspr_handle = dlopenAPKLibrary(apkName, "libnspr4.so");
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plc_handle = dlopenAPKLibrary(apkName, "libplc4.so");
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#endif
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if (!nss_handle) {
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__android_log_print(ANDROID_LOG_ERROR, "GeckoLibLoad", "Couldn't get a handle to libnss3!");
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return FAILURE;
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}
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#ifndef MOZ_FOLD_LIBS
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if (!nspr_handle) {
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__android_log_print(ANDROID_LOG_ERROR, "GeckoLibLoad", "Couldn't get a handle to libnspr4!");
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return FAILURE;
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}
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if (!plc_handle) {
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__android_log_print(ANDROID_LOG_ERROR, "GeckoLibLoad", "Couldn't get a handle to libplc4!");
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return FAILURE;
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}
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#endif
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return setup_nss_functions(nss_handle, nspr_handle, plc_handle);
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}
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extern "C" APKOPEN_EXPORT void MOZ_JNICALL
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Java_org_mozilla_gecko_mozglue_GeckoLoader_loadGeckoLibsNative(JNIEnv *jenv, jclass jGeckoAppShellClass, jstring jApkName)
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{
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jenv->GetJavaVM(&sJavaVM);
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const char* str;
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// XXX: java doesn't give us true UTF8, we should figure out something
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// better to do here
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str = jenv->GetStringUTFChars(jApkName, nullptr);
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if (str == nullptr)
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return;
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int res = loadGeckoLibs(str);
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if (res != SUCCESS) {
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JNI_Throw(jenv, "java/lang/Exception", "Error loading gecko libraries");
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}
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jenv->ReleaseStringUTFChars(jApkName, str);
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}
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extern "C" APKOPEN_EXPORT void MOZ_JNICALL
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Java_org_mozilla_gecko_mozglue_GeckoLoader_loadSQLiteLibsNative(JNIEnv *jenv, jclass jGeckoAppShellClass, jstring jApkName) {
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const char* str;
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// XXX: java doesn't give us true UTF8, we should figure out something
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// better to do here
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str = jenv->GetStringUTFChars(jApkName, nullptr);
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if (str == nullptr)
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return;
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__android_log_print(ANDROID_LOG_ERROR, "GeckoLibLoad", "Load sqlite start\n");
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mozglueresult rv = loadSQLiteLibs(str);
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if (rv != SUCCESS) {
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JNI_Throw(jenv, "java/lang/Exception", "Error loading sqlite libraries");
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}
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__android_log_print(ANDROID_LOG_ERROR, "GeckoLibLoad", "Load sqlite done\n");
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jenv->ReleaseStringUTFChars(jApkName, str);
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}
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extern "C" APKOPEN_EXPORT void MOZ_JNICALL
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Java_org_mozilla_gecko_mozglue_GeckoLoader_loadNSSLibsNative(JNIEnv *jenv, jclass jGeckoAppShellClass, jstring jApkName) {
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const char* str;
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// XXX: java doesn't give us true UTF8, we should figure out something
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// better to do here
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str = jenv->GetStringUTFChars(jApkName, nullptr);
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if (str == nullptr)
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return;
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__android_log_print(ANDROID_LOG_ERROR, "GeckoLibLoad", "Load nss start\n");
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mozglueresult rv = loadNSSLibs(str);
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if (rv != SUCCESS) {
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JNI_Throw(jenv, "java/lang/Exception", "Error loading nss libraries");
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}
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__android_log_print(ANDROID_LOG_ERROR, "GeckoLibLoad", "Load nss done\n");
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jenv->ReleaseStringUTFChars(jApkName, str);
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}
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static char**
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CreateArgvFromObjectArray(JNIEnv *jenv, jobjectArray jargs, int* length)
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{
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size_t stringCount = jenv->GetArrayLength(jargs);
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if (length) {
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*length = stringCount;
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}
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if (!stringCount) {
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return nullptr;
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}
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char** argv = new char*[stringCount + 1];
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argv[stringCount] = nullptr;
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for (size_t ix = 0; ix < stringCount; ix++) {
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jstring string = (jstring) (jenv->GetObjectArrayElement(jargs, ix));
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const char* rawString = jenv->GetStringUTFChars(string, nullptr);
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const int strLength = jenv->GetStringUTFLength(string);
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argv[ix] = strndup(rawString, strLength);
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jenv->ReleaseStringUTFChars(string, rawString);
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jenv->DeleteLocalRef(string);
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}
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return argv;
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}
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static void
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FreeArgv(char** argv, int argc)
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{
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for (int ix=0; ix < argc; ix++) {
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// String was allocated with strndup, so need to use free to deallocate.
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free(argv[ix]);
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}
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delete[](argv);
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}
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extern "C" APKOPEN_EXPORT void MOZ_JNICALL
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Java_org_mozilla_gecko_mozglue_GeckoLoader_nativeRun(JNIEnv *jenv, jclass jc, jobjectArray jargs, int prefsFd, int ipcFd, int crashFd, int crashAnnotationFd)
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{
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int argc = 0;
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char** argv = CreateArgvFromObjectArray(jenv, jargs, &argc);
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if (ipcFd < 0) {
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if (gBootstrap == nullptr) {
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FreeArgv(argv, argc);
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return;
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}
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ElfLoader::Singleton.ExpectShutdown(false);
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gBootstrap->GeckoStart(jenv, argv, argc, sAppData);
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ElfLoader::Singleton.ExpectShutdown(true);
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} else {
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gBootstrap->XRE_SetAndroidChildFds(jenv, prefsFd, ipcFd, crashFd, crashAnnotationFd);
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gBootstrap->XRE_SetProcessType(argv[argc - 1]);
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XREChildData childData;
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gBootstrap->XRE_InitChildProcess(argc - 1, argv, &childData);
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}
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gBootstrap.reset();
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FreeArgv(argv, argc);
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}
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extern "C" APKOPEN_EXPORT mozglueresult
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ChildProcessInit(int argc, char* argv[])
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{
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int i;
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for (i = 0; i < (argc - 1); i++) {
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if (strcmp(argv[i], "-greomni"))
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continue;
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i = i + 1;
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break;
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}
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if (loadNSSLibs(argv[i]) != SUCCESS) {
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return FAILURE;
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}
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if (loadSQLiteLibs(argv[i]) != SUCCESS) {
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return FAILURE;
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}
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if (loadGeckoLibs(argv[i]) != SUCCESS) {
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return FAILURE;
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}
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gBootstrap->XRE_SetProcessType(argv[--argc]);
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XREChildData childData;
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return NS_FAILED(gBootstrap->XRE_InitChildProcess(argc, argv, &childData));
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}
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|
extern "C" APKOPEN_EXPORT jboolean MOZ_JNICALL
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|
Java_org_mozilla_gecko_mozglue_GeckoLoader_neonCompatible(JNIEnv *jenv, jclass jc)
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|
{
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|
#ifdef __ARM_EABI__
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return mozilla::supports_neon();
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#else
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return true;
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|
#endif // __ARM_EABI__
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}
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|
|
// Does current process name end with ':media'?
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|
static bool
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IsMediaProcess()
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|
{
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|
pid_t pid = getpid();
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|
char str[256];
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SprintfLiteral(str, "/proc/%d/cmdline", pid);
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|
FILE* f = fopen(str, "r");
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if (f) {
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fgets(str, sizeof(str), f);
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fclose(f);
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|
const size_t strLen = strlen(str);
|
|
const char suffix[] = ":media";
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|
const size_t suffixLen = sizeof(suffix) - 1;
|
|
if (strLen >= suffixLen &&
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!strncmp(str + strLen - suffixLen, suffix, suffixLen)) {
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return true;
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}
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|
}
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return false;
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}
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|
|
#ifndef SYS_rt_tgsigqueueinfo
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|
#define SYS_rt_tgsigqueueinfo __NR_rt_tgsigqueueinfo
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|
#endif
|
|
/* Copy of http://androidxref.com/7.1.1_r6/xref/bionic/linker/debugger.cpp#262,
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|
* with debuggerd related code stripped.
|
|
*
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|
* Copyright (C) 2008 The Android Open Source Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
|
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
|
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* 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
|
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* the documentation and/or other materials provided with the
|
|
* distribution.
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*
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|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "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,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
|
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
|
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
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* SUCH DAMAGE.
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*/
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static void
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CatchFatalSignals(int num, siginfo_t *info, void *context)
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|
{
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// It's possible somebody cleared the SA_SIGINFO flag, which would mean
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// our "info" arg holds an undefined value.
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struct sigaction action = {};
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if ((sigaction(num, nullptr, &action) < 0) ||
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!(action.sa_flags & SA_SIGINFO)) {
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info = nullptr;
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}
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|
|
|
// We need to return from the signal handler so that debuggerd can dump the
|
|
// thread that crashed, but returning here does not guarantee that the signal
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|
// will be thrown again, even for SIGSEGV and friends, since the signal could
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// have been sent manually. Resend the signal with rt_tgsigqueueinfo(2) to
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// preserve the SA_SIGINFO contents.
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|
signal(num, SIG_DFL);
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|
|
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struct siginfo si;
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|
if (!info) {
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memset(&si, 0, sizeof(si));
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|
si.si_code = SI_USER;
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si.si_pid = getpid();
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si.si_uid = getuid();
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|
info = &si;
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} else if (info->si_code >= 0 || info->si_code == SI_TKILL) {
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|
// rt_tgsigqueueinfo(2)'s documentation appears to be incorrect on kernels
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|
// that contain commit 66dd34a (3.9+). The manpage claims to only allow
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|
// negative si_code values that are not SI_TKILL, but 66dd34a changed the
|
|
// check to allow all si_code values in calls coming from inside the house.
|
|
}
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|
|
|
int rc = syscall(SYS_rt_tgsigqueueinfo, getpid(), gettid(), num, info);
|
|
if (rc != 0) {
|
|
__android_log_print(ANDROID_LOG_FATAL, "mozglue",
|
|
"failed to resend signal during crash: %s",
|
|
strerror(errno));
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|
_exit(0);
|
|
}
|
|
}
|
|
|
|
extern "C" APKOPEN_EXPORT void MOZ_JNICALL
|
|
Java_org_mozilla_gecko_mozglue_GeckoLoader_suppressCrashDialog(JNIEnv *jenv, jclass jc)
|
|
{
|
|
MOZ_RELEASE_ASSERT(IsMediaProcess(), "Suppress crash dialog only for media process");
|
|
// Restoring to SIG_DFL will crash on x86/Android M devices (see bug 1374556)
|
|
// so copy Android code (http://androidxref.com/7.1.1_r6/xref/bionic/linker/debugger.cpp#302).
|
|
// See comments above CatchFatalSignals() for copyright notice.
|
|
struct sigaction action;
|
|
memset(&action, 0, sizeof(action));
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|
sigemptyset(&action.sa_mask);
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|
action.sa_sigaction = &CatchFatalSignals;
|
|
action.sa_flags = SA_RESTART | SA_SIGINFO;
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|
|
|
// Use the alternate signal stack if available so we can catch stack overflows.
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|
action.sa_flags |= SA_ONSTACK;
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|
|
|
sigaction(SIGABRT, &action, nullptr);
|
|
sigaction(SIGBUS, &action, nullptr);
|
|
sigaction(SIGFPE, &action, nullptr);
|
|
sigaction(SIGILL, &action, nullptr);
|
|
sigaction(SIGSEGV, &action, nullptr);
|
|
#if defined(SIGSTKFLT)
|
|
sigaction(SIGSTKFLT, &action, nullptr);
|
|
#endif
|
|
sigaction(SIGTRAP, &action, nullptr);
|
|
}
|