Merge changes I4e5db32c,I2a448282
* changes:
binder_ndk: fix performance-noexcept-move-constructor
binder_ndk: fix bugprone-unhandled-self-assignment
diff --git a/cmds/installd/dexopt.cpp b/cmds/installd/dexopt.cpp
index f583c9b..594880a 100644
--- a/cmds/installd/dexopt.cpp
+++ b/cmds/installd/dexopt.cpp
@@ -450,16 +450,22 @@
AddArg("--boot-image-merge");
}
+ // The percent won't exceed 100, otherwise, don't set it and use the
+ // default one set in profman.
uint32_t min_new_classes_percent_change = ::android::base::GetUintProperty<uint32_t>(
- "dalvik.vm.bgdexopt.new-classes-percent", /*default*/-1);
- if (min_new_classes_percent_change >= 0 && min_new_classes_percent_change <= 100) {
+ "dalvik.vm.bgdexopt.new-classes-percent",
+ /*default*/std::numeric_limits<uint32_t>::max());
+ if (min_new_classes_percent_change <= 100) {
AddArg("--min-new-classes-percent-change=" +
std::to_string(min_new_classes_percent_change));
}
+ // The percent won't exceed 100, otherwise, don't set it and use the
+ // default one set in profman.
uint32_t min_new_methods_percent_change = ::android::base::GetUintProperty<uint32_t>(
- "dalvik.vm.bgdexopt.new-methods-percent", /*default*/-1);
- if (min_new_methods_percent_change >=0 && min_new_methods_percent_change <= 100) {
+ "dalvik.vm.bgdexopt.new-methods-percent",
+ /*default*/std::numeric_limits<uint32_t>::max());
+ if (min_new_methods_percent_change <= 100) {
AddArg("--min-new-methods-percent-change=" +
std::to_string(min_new_methods_percent_change));
}
diff --git a/libs/binder/Android.bp b/libs/binder/Android.bp
index c92064a..f4f036e 100644
--- a/libs/binder/Android.bp
+++ b/libs/binder/Android.bp
@@ -146,6 +146,7 @@
"-Wextra",
"-Werror",
"-Wzero-as-null-pointer-constant",
+ "-DANDROID_BASE_UNIQUE_FD_DISABLE_IMPLICIT_CONVERSION",
],
product_variables: {
binder32bit: {
diff --git a/libs/binder/BpBinder.cpp b/libs/binder/BpBinder.cpp
index c183d29..8264154 100644
--- a/libs/binder/BpBinder.cpp
+++ b/libs/binder/BpBinder.cpp
@@ -223,13 +223,14 @@
if (code >= FIRST_CALL_TRANSACTION && code <= LAST_CALL_TRANSACTION) {
using android::internal::Stability;
- auto stability = Stability::get(this);
- auto required = privateVendor ? Stability::VENDOR : Stability::getLocalStability();
+ auto category = Stability::getCategory(this);
+ Stability::Level required = privateVendor ? Stability::VENDOR
+ : Stability::getLocalLevel();
- if (CC_UNLIKELY(!Stability::check(stability, required))) {
+ if (CC_UNLIKELY(!Stability::check(category, required))) {
ALOGE("Cannot do a user transaction on a %s binder in a %s context.",
- Stability::stabilityString(stability).c_str(),
- Stability::stabilityString(required).c_str());
+ category.debugString().c_str(),
+ Stability::levelString(required).c_str());
return BAD_TYPE;
}
}
diff --git a/libs/binder/Parcel.cpp b/libs/binder/Parcel.cpp
index d31cddb..7737d53 100644
--- a/libs/binder/Parcel.cpp
+++ b/libs/binder/Parcel.cpp
@@ -171,7 +171,8 @@
if (status != OK) return status;
internal::Stability::tryMarkCompilationUnit(binder.get());
- return writeInt32(internal::Stability::get(binder.get()));
+ auto category = internal::Stability::getCategory(binder.get());
+ return writeInt32(category.repr());
}
status_t Parcel::finishUnflattenBinder(
@@ -181,7 +182,7 @@
status_t status = readInt32(&stability);
if (status != OK) return status;
- status = internal::Stability::set(binder.get(), stability, true /*log*/);
+ status = internal::Stability::setRepr(binder.get(), stability, true /*log*/);
if (status != OK) return status;
*out = binder;
diff --git a/libs/binder/Stability.cpp b/libs/binder/Stability.cpp
index 6115aec..339c538 100644
--- a/libs/binder/Stability.cpp
+++ b/libs/binder/Stability.cpp
@@ -13,6 +13,8 @@
* See the License for the specific language governing permissions and
* limitations under the License.
*/
+#define LOG_TAG "Stability"
+
#include <binder/Stability.h>
#include <binder/BpBinder.h>
@@ -21,34 +23,59 @@
namespace android {
namespace internal {
+// the libbinder parcel format is currently unstable
+
+// oldest version which is supported
+constexpr uint8_t kBinderWireFormatOldest = 1;
+// current version
+constexpr uint8_t kBinderWireFormatVersion = 1;
+
+Stability::Category Stability::Category::currentFromLevel(Level level) {
+ return {
+ .version = kBinderWireFormatVersion,
+ .reserved = {0},
+ .level = level,
+ };
+}
+
+std::string Stability::Category::debugString() {
+ return levelString(level) + " wire protocol version "
+ + std::to_string(version);
+}
+
void Stability::markCompilationUnit(IBinder* binder) {
- status_t result = set(binder, getLocalStability(), true /*log*/);
+ auto stability = Category::currentFromLevel(getLocalLevel());
+ status_t result = setRepr(binder, stability.repr(), true /*log*/);
LOG_ALWAYS_FATAL_IF(result != OK, "Should only mark known object.");
}
void Stability::markVintf(IBinder* binder) {
- status_t result = set(binder, Level::VINTF, true /*log*/);
+ auto stability = Category::currentFromLevel(Level::VINTF);
+ status_t result = setRepr(binder, stability.repr(), true /*log*/);
LOG_ALWAYS_FATAL_IF(result != OK, "Should only mark known object.");
}
void Stability::debugLogStability(const std::string& tag, const sp<IBinder>& binder) {
- ALOGE("%s: stability is %s", tag.c_str(), stabilityString(get(binder.get())).c_str());
+ auto stability = getCategory(binder.get());
+ ALOGE("%s: stability is %s", tag.c_str(), stability.debugString().c_str());
}
void Stability::markVndk(IBinder* binder) {
- status_t result = set(binder, Level::VENDOR, true /*log*/);
+ auto stability = Category::currentFromLevel(Level::VENDOR);
+ status_t result = setRepr(binder, stability.repr(), true /*log*/);
LOG_ALWAYS_FATAL_IF(result != OK, "Should only mark known object.");
}
bool Stability::requiresVintfDeclaration(const sp<IBinder>& binder) {
- return check(get(binder.get()), Level::VINTF);
+ return check(getCategory(binder.get()), Level::VINTF);
}
void Stability::tryMarkCompilationUnit(IBinder* binder) {
- (void) set(binder, getLocalStability(), false /*log*/);
+ auto stability = Category::currentFromLevel(getLocalLevel());
+ (void) setRepr(binder, stability.repr(), false /*log*/);
}
-Stability::Level Stability::getLocalStability() {
+Stability::Level Stability::getLocalLevel() {
#ifdef __ANDROID_VNDK__
#ifdef __ANDROID_APEX__
// TODO(b/142684679) avoid use_vendor on system APEXes
@@ -67,65 +94,81 @@
#endif
}
-status_t Stability::set(IBinder* binder, int32_t stability, bool log) {
- Level currentStability = get(binder);
+status_t Stability::setRepr(IBinder* binder, int32_t representation, bool log) {
+ auto current = getCategory(binder);
+ auto setting = Category::fromRepr(representation);
+
+ // If we have ahold of a binder with a newer declared version, then it
+ // should support older versions, and we will simply write our parcels with
+ // the current wire parcel format.
+ if (setting.version < kBinderWireFormatOldest) {
+ // always log, because this shouldn't happen
+ ALOGE("Cannot accept binder with older binder wire protocol version "
+ "%u. Versions less than %u are unsupported.", setting.version,
+ kBinderWireFormatOldest);
+ return BAD_TYPE;
+ }
// null binder is always written w/ 'UNDECLARED' stability
if (binder == nullptr) {
- if (stability == UNDECLARED) {
+ if (setting.level == UNDECLARED) {
return OK;
} else {
if (log) {
ALOGE("Null binder written with stability %s.",
- stabilityString(stability).c_str());
+ levelString(setting.level).c_str());
}
return BAD_TYPE;
}
}
- if (!isDeclaredStability(stability)) {
+ if (!isDeclaredLevel(setting.level)) {
if (log) {
- ALOGE("Can only set known stability, not %d.", stability);
+ ALOGE("Can only set known stability, not %u.", setting.level);
}
return BAD_TYPE;
}
- if (currentStability != Level::UNDECLARED && currentStability != stability) {
+ if (current.repr() != 0 && current != setting) {
if (log) {
- ALOGE("Interface being set with %s but it is already marked as %s.",
- stabilityString(stability).c_str(), stabilityString(currentStability).c_str());
+ ALOGE("Interface being set with %s but it is already marked as %s",
+ setting.debugString().c_str(),
+ current.debugString().c_str());
}
return BAD_TYPE;
}
- if (currentStability == stability) return OK;
+ if (current == setting) return OK;
BBinder* local = binder->localBinder();
if (local != nullptr) {
- local->mStability = static_cast<int32_t>(stability);
+ local->mStability = setting.repr();
} else {
- binder->remoteBinder()->mStability = static_cast<int32_t>(stability);
+ binder->remoteBinder()->mStability = setting.repr();
}
return OK;
}
-Stability::Level Stability::get(IBinder* binder) {
- if (binder == nullptr) return UNDECLARED;
+Stability::Category Stability::getCategory(IBinder* binder) {
+ if (binder == nullptr) {
+ return Category::currentFromLevel(Level::UNDECLARED);
+ }
BBinder* local = binder->localBinder();
if (local != nullptr) {
- return static_cast<Stability::Level>(local->mStability);
+ return Category::fromRepr(local->mStability);
}
- return static_cast<Stability::Level>(binder->remoteBinder()->mStability);
+ return Category::fromRepr(binder->remoteBinder()->mStability);
}
-bool Stability::check(int32_t provided, Level required) {
- bool stable = (provided & required) == required;
+bool Stability::check(Category provided, Level required) {
+ bool stable = (provided.level & required) == required;
- if (!isDeclaredStability(provided) && provided != UNDECLARED) {
- ALOGE("Unknown stability when checking interface stability %d.", provided);
+ if (provided.level != UNDECLARED && !isDeclaredLevel(provided.level)) {
+ ALOGE("Unknown stability when checking interface stability %d.",
+ provided.level);
stable = false;
}
@@ -133,18 +176,18 @@
return stable;
}
-bool Stability::isDeclaredStability(int32_t stability) {
+bool Stability::isDeclaredLevel(Level stability) {
return stability == VENDOR || stability == SYSTEM || stability == VINTF;
}
-std::string Stability::stabilityString(int32_t stability) {
- switch (stability) {
+std::string Stability::levelString(Level level) {
+ switch (level) {
case Level::UNDECLARED: return "undeclared stability";
case Level::VENDOR: return "vendor stability";
case Level::SYSTEM: return "system stability";
case Level::VINTF: return "vintf stability";
}
- return "unknown stability " + std::to_string(stability);
+ return "unknown stability " + std::to_string(level);
}
} // namespace internal
diff --git a/libs/binder/Status.cpp b/libs/binder/Status.cpp
index 64ab7a9..b5a078c 100644
--- a/libs/binder/Status.cpp
+++ b/libs/binder/Status.cpp
@@ -245,10 +245,5 @@
return ret;
}
-std::stringstream& operator<< (std::stringstream& stream, const Status& s) {
- stream << s.toString8().string();
- return stream;
-}
-
} // namespace binder
} // namespace android
diff --git a/libs/binder/include/binder/Parcel.h b/libs/binder/include/binder/Parcel.h
index a971755..ece25a0 100644
--- a/libs/binder/include/binder/Parcel.h
+++ b/libs/binder/include/binder/Parcel.h
@@ -40,13 +40,13 @@
typedef unsigned long long binder_size_t;
#endif
+struct flat_binder_object;
// ---------------------------------------------------------------------------
namespace android {
template <typename T> class Flattenable;
template <typename T> class LightFlattenable;
-struct flat_binder_object;
class IBinder;
class IPCThreadState;
class ProcessState;
diff --git a/libs/binder/include/binder/ParcelFileDescriptor.h b/libs/binder/include/binder/ParcelFileDescriptor.h
index 4ba6ba8..9896fd7 100644
--- a/libs/binder/include/binder/ParcelFileDescriptor.h
+++ b/libs/binder/include/binder/ParcelFileDescriptor.h
@@ -43,22 +43,22 @@
android::status_t readFromParcel(const android::Parcel* parcel) override;
inline bool operator!=(const ParcelFileDescriptor& rhs) const {
- return mFd != rhs.mFd;
+ return mFd.get() != rhs.mFd.get();
}
inline bool operator<(const ParcelFileDescriptor& rhs) const {
- return mFd < rhs.mFd;
+ return mFd.get() < rhs.mFd.get();
}
inline bool operator<=(const ParcelFileDescriptor& rhs) const {
- return mFd <= rhs.mFd;
+ return mFd.get() <= rhs.mFd.get();
}
inline bool operator==(const ParcelFileDescriptor& rhs) const {
- return mFd == rhs.mFd;
+ return mFd.get() == rhs.mFd.get();
}
inline bool operator>(const ParcelFileDescriptor& rhs) const {
- return mFd > rhs.mFd;
+ return mFd.get() > rhs.mFd.get();
}
inline bool operator>=(const ParcelFileDescriptor& rhs) const {
- return mFd >= rhs.mFd;
+ return mFd.get() >= rhs.mFd.get();
}
private:
android::base::unique_fd mFd;
diff --git a/libs/binder/include/binder/Stability.h b/libs/binder/include/binder/Stability.h
index 6566285..12272ba 100644
--- a/libs/binder/include/binder/Stability.h
+++ b/libs/binder/include/binder/Stability.h
@@ -26,6 +26,29 @@
namespace internal {
+// Stability encodes how a binder changes over time. There are two levels of
+// stability:
+// 1). the interface stability - this is how a particular set of API calls (a
+// particular ordering of things like writeInt32/readInt32) are changed over
+// time. If one release, we have 'writeInt32' and the next release, we have
+// 'writeInt64', then this interface doesn't have a very stable
+// Stability::Level. Usually this ordering is controlled by a .aidl file.
+// 2). the wire format stability - this is how these API calls map to actual
+// bytes that are written to the wire (literally, this is how they are written
+// to the kernel inside of IBinder::transact, but it may be expanded to other
+// wires in the future). For instance, writeInt32 in binder translates to
+// writing a 4-byte little-endian integer in two's complement. You can imagine
+// in the future, we change writeInt32/readInt32 to instead write 8-bytes with
+// that integer and some check bits. In this case, the wire format changes,
+// but as long as a client libbinder knows to keep on writing a 4-byte value
+// to old servers, and new servers know how to interpret the 8-byte result,
+// they can still communicate.
+//
+// Every binder object has a stability level associated with it, and when
+// communicating with a binder, we make sure that the command we sent is one
+// that it knows how to process. The summary of stability of a binder is
+// represented by a Stability::Category object.
+
// WARNING: These APIs are only ever expected to be called by auto-generated code.
// Instead of calling them, you should set the stability of a .aidl interface
class Stability final {
@@ -73,7 +96,7 @@
static void tryMarkCompilationUnit(IBinder* binder);
- enum Level : int32_t {
+ enum Level : uint8_t {
UNDECLARED = 0,
VENDOR = 0b000011,
@@ -81,19 +104,54 @@
VINTF = 0b111111,
};
+ // This is the format of stability passed on the wire.
+ struct Category {
+ static inline Category fromRepr(int32_t representation) {
+ return *reinterpret_cast<Category*>(&representation);
+ }
+ int32_t repr() const {
+ return *reinterpret_cast<const int32_t*>(this);
+ }
+ static inline Category currentFromLevel(Level level);
+
+ bool operator== (const Category& o) const {
+ return repr() == o.repr();
+ }
+ bool operator!= (const Category& o) const {
+ return !(*this == o);
+ }
+
+ std::string debugString();
+
+ // This is the version of the wire protocol associated with the host
+ // process of a particular binder. As the wire protocol changes, if
+ // sending a transaction to a binder with an old version, the Parcel
+ // class must write parcels according to the version documented here.
+ uint8_t version;
+
+ uint8_t reserved[2];
+
+ // bitmask of Stability::Level
+ Level level;
+ };
+ static_assert(sizeof(Category) == sizeof(int32_t));
+
// returns the stability according to how this was built
- static Level getLocalStability();
+ static Level getLocalLevel();
// applies stability to binder if stability level is known
__attribute__((warn_unused_result))
- static status_t set(IBinder* binder, int32_t stability, bool log);
+ static status_t setRepr(IBinder* binder, int32_t representation, bool log);
- static Level get(IBinder* binder);
+ // get stability information as encoded on the wire
+ static Category getCategory(IBinder* binder);
- static bool check(int32_t provided, Level required);
+ // whether a transaction on binder is allowed, if the transaction
+ // is done from a context with a specific stability level
+ static bool check(Category provided, Level required);
- static bool isDeclaredStability(int32_t stability);
- static std::string stabilityString(int32_t stability);
+ static bool isDeclaredLevel(Level level);
+ static std::string levelString(Level level);
Stability();
};
diff --git a/libs/binder/include/binder/Status.h b/libs/binder/include/binder/Status.h
index 7d889b6..c30ae01 100644
--- a/libs/binder/include/binder/Status.h
+++ b/libs/binder/include/binder/Status.h
@@ -18,7 +18,8 @@
#define ANDROID_BINDER_STATUS_H
#include <cstdint>
-#include <sstream>
+#include <sstream> // historical
+#include <ostream>
#include <binder/Parcel.h>
#include <utils/String8.h>
@@ -153,8 +154,9 @@
String8 mMessage;
}; // class Status
-// For gtest output logging
-std::stringstream& operator<< (std::stringstream& stream, const Status& s);
+static inline std::ostream& operator<< (std::ostream& o, const Status& s) {
+ return o << s.toString8();
+}
} // namespace binder
} // namespace android
diff --git a/libs/binder/include/private/binder/binder_module.h b/libs/binder/include/private/binder/binder_module.h
index 0fe7f5b..5a719b8 100644
--- a/libs/binder/include/private/binder/binder_module.h
+++ b/libs/binder/include/private/binder/binder_module.h
@@ -17,10 +17,6 @@
#ifndef _BINDER_MODULE_H_
#define _BINDER_MODULE_H_
-#ifdef __cplusplus
-namespace android {
-#endif
-
/* obtain structures and constants from the kernel header */
// TODO(b/31559095): bionic on host
@@ -36,6 +32,10 @@
#include <sys/ioctl.h>
#include <linux/android/binder.h>
+#ifdef __cplusplus
+namespace android {
+#endif
+
#ifndef BR_FROZEN_REPLY
// Temporary definition of BR_FROZEN_REPLY. For production
// this will come from UAPI binder.h