Android Builds of OpenJDK Mobile project now available
Bob Vandette
bob.vandette at oracle.com
Wed Feb 17 17:44:45 UTC 2016
Ali,
You are correct that there are problems building JDK 9 for Android using the latest
Android NDK (r10e).
I’ve filed an enhancement issue to track this problem.
https://bugs.openjdk.java.net/browse/JDK-8150074 <https://bugs.openjdk.java.net/browse/JDK-8150074>
If you have a chance to dig into these issues further, please do so and update the alias.
If you get to the point of having a clean webrev, I can review it and help you integrate it.
Some of the static versus non-static issues may be related to the fact that we had to add
implement a few missing bionic functions in our sources. It’s possible that these conflicts
are due to the fact that the NDK r10e now supports these functions. The best solution
is to remove our temporary implementations.
Many of the other issues may fall into the same category where the newer NDK may be
getting closer to standard linux/glibc allowing us to remove android specific ifdefs.
As for the requirement to define the tools (CC, CXX, etc) this should not be necessary.
Did you follow the instructions I posted on generating an NDK based toolchain?
Bob.
> On Feb 17, 2016, at 6:38 AM, Ali Ebrahimi <ali.ebrahimi1781 at gmail.com> wrote:
>
> Hi Bob,
> I finally built mobile jdk for x86 and arm with some modifications:
> I used:
> OS: Ubuntu 15.10
> NDK: android-ndk-r10e-linux-x86_64 with --platform=android-21 for building toolchain
>
> But my modifications:
> JDK:
> Errors:
> 1) error: static declaration of <some method> follows non-static declaration
>
> diff -r 91482de10f40 src/java.base/linux/native/libjava/ProcessHandleImpl_linux.c
> --- a/src/java.base/linux/native/libjava/ProcessHandleImpl_linux.c Wed Feb 10 14:17:12 2016 -0500
> +++ b/src/java.base/linux/native/libjava/ProcessHandleImpl_linux.c Tue Feb 16 21:06:55 2016 +0330
> @@ -242,7 +242,7 @@
> }
>
> #ifdef __ANDROID__
> -static int getline(char **line, size_t *len, FILE *fp) {
> +int getline(char **line, size_t *len, FILE *fp) {
> char *buf;
> size_t bufLen;
> if (*line != NULL) {
>
> diff -r 91482de10f40 src/java.base/linux/native/libnio/fs/LinuxNativeDispatcher.c
> --- a/src/java.base/linux/native/libnio/fs/LinuxNativeDispatcher.c Wed Feb 10 14:17:12 2016 -0500
> +++ b/src/java.base/linux/native/libnio/fs/LinuxNativeDispatcher.c Tue Feb 16 21:06:55 2016 +0330
> @@ -174,7 +174,7 @@
> }
>
> #ifdef __ANDROID__
> -static struct mntent* getmntent_r(FILE* fp, struct mntent* m, char* buf, int buflen) {
> +struct mntent* getmntent_r(FILE* fp, struct mntent* m, char* buf, int buflen) {
> if (m) {
> char *str;
> char *last;
> diff -r 91482de10f40 src/java.base/unix/native/libjava/ProcessHandleImpl_unix.c
> --- a/src/java.base/unix/native/libjava/ProcessHandleImpl_unix.c Wed Feb 10 14:17:12 2016 -0500
> +++ b/src/java.base/unix/native/libjava/ProcessHandleImpl_unix.c Tue Feb 16 21:06:55 2016 +0330
> @@ -115,7 +115,7 @@
> * support. Determine if the following are the most suitable alternatives.
> *
> */
> -static int getpwuid_r(uid_t uid, struct passwd* pwd, char* buf, size_t buflen, struct passwd** result)
> +int getpwuid_r(uid_t uid, struct passwd* pwd, char* buf, size_t buflen, struct passwd** result)
> {
> *result = NULL;
> errno = 0;
> diff -r 91482de10f40 src/java.base/unix/native/libnio/fs/UnixNativeDispatcher.c
> --- a/src/java.base/unix/native/libnio/fs/UnixNativeDispatcher.c Wed Feb 10 14:17:12 2016 -0500
> +++ b/src/java.base/unix/native/libnio/fs/UnixNativeDispatcher.c Tue Feb 16 21:06:55 2016 +0330
> @@ -160,7 +160,7 @@
> * support. Determine if the following are the most suitable alternatives.
> *
> */
> -static int getpwuid_r(uid_t uid, struct passwd* pwd, char* buf, size_t buflen, struct passwd** result)
> +int getpwuid_r(uid_t uid, struct passwd* pwd, char* buf, size_t buflen, struct passwd** result)
> {
> *result = NULL;
> errno = 0;
> @@ -173,7 +173,7 @@
> return 0;
> }
>
> -static int getpwnam_r(const char *name, struct passwd* pwd, char* buf, size_t buflen, struct passwd** result)
> +int getpwnam_r(const char *name, struct passwd* pwd, char* buf, size_t buflen, struct passwd** result)
> {
> *result = NULL;
> errno = 0;
> @@ -186,7 +186,7 @@
> return 0;
> }
>
> -static int getgrgid_r(gid_t gid, struct group* grp, char* buf, size_t buflen, struct group** result)
> +int getgrgid_r(gid_t gid, struct group* grp, char* buf, size_t buflen, struct group** result)
> {
> *result = NULL;
> errno = 0;
> @@ -199,7 +199,7 @@
> return 0;
> }
>
> -static int getgrnam_r(const char *name, struct group* grp, char* buf, size_t buflen, struct group** result)
> +int getgrnam_r(const char *name, struct group* grp, char* buf, size_t buflen, struct group** result)
> {
> *result = NULL;
> errno = 0;
> diff -r 91482de10f40 src/jdk.security.auth/unix/native/libjaas/Unix.c
> --- a/src/jdk.security.auth/unix/native/libjaas/Unix.c Wed Feb 10 14:17:12 2016 -0500
> +++ b/src/jdk.security.auth/unix/native/libjaas/Unix.c Tue Feb 16 21:06:55 2016 +0330
> @@ -39,7 +39,7 @@
> #include <errno.h>
>
> #ifdef __ANDROID__
> -static int getpwuid_r(uid_t uid, struct passwd* pwd, char* buf, size_t buflen, struct passwd** result)
> +int getpwuid_r(uid_t uid, struct passwd* pwd, char* buf, size_t buflen, struct passwd** result)
> {
> *result = NULL;
> errno = 0;
>
> 2)
> Error “initializer element is not constant” when trying to initialize variable <http://stackoverflow.com/questions/3025050/error-initializer-element-is-not-constant-when-trying-to-initialize-variable-w>
> I only commented line: this is only workaound
>
> diff -r 91482de10f40 src/java.base/linux/native/libnet/linux_close.c
> --- a/src/java.base/linux/native/libnet/linux_close.c Wed Feb 10 14:17:12 2016 -0500
> +++ b/src/java.base/linux/native/libnet/linux_close.c Tue Feb 16 21:06:55 2016 +0330
> @@ -57,7 +57,7 @@
> * Signal to unblock thread
> */
> #ifdef __ANDROID__
> -#define __SIGRTMAX SIGRTMAX
> +//#define __SIGRTMAX SIGRTMAX
> #endif
> static int sigWakeup = (__SIGRTMAX - 2);
>
> Hotspot:
>
> 1) error: static declaration of <some method> follows non-static declaration
>
> diff -r de1d92b01bae src/os/linux/vm/perfMemory_linux.cpp
> --- a/src/os/linux/vm/perfMemory_linux.cpp Wed Feb 10 14:15:17 2016 -0500
> +++ b/src/os/linux/vm/perfMemory_linux.cpp Tue Feb 16 20:32:38 2016 +0330
> @@ -44,7 +44,7 @@
> # include <pwd.h>
>
> #ifdef __ANDROID__
> -static int getpwuid_r(uid_t uid, struct passwd* pwd, char* buf, size_t buflen, struct passwd** result)
> +int getpwuid_r(uid_t uid, struct passwd* pwd, char* buf, size_t buflen, struct passwd** result)
> {
> *result = NULL;
> errno = 0;
>
> 2) error: conflicting declaration 'typedef elf_greg_t greg_t'
> android-x86-toolchain/sysroot/usr/include/sys/ucontext.h:123:13: note: previous declaration as 'typedef int greg_t'
>
> I forced redefinition with #define macro. I don't know if redefinition is required here
>
> diff -r de1d92b01bae src/os_cpu/linux_x86/vm/os_linux_x86.cpp
> --- a/src/os_cpu/linux_x86/vm/os_linux_x86.cpp Wed Feb 10 14:15:17 2016 -0500
> +++ b/src/os_cpu/linux_x86/vm/os_linux_x86.cpp Tue Feb 16 20:32:38 2016 +0330
> @@ -89,6 +89,7 @@
> #endif
>
> #ifdef __ANDROID__
> +#define greg_t elf_greg_t
> typedef elf_greg_t greg_t;
> #define SPELL_REG_SP "esp"
> #define SPELL_REG_FP "ebp"
> #define CTX_REG_AX eax
>
> 3) error: conflicting declaration 'typedef struct asm_ucontext ucontext_t'
> typedef struct ucontext ucontext_t;
> ..
> android-x86-toolchain/sysroot/usr/include/sys/ucontext.h:161:3: note: previous declaration as 'typedef struct ucontext ucontext_t'
> } ucontext_t;
>
> This is my hack��
>
> diff -r de1d92b01bae src/share/vm/utilities/globalDefinitions_gcc.hpp
> --- a/src/share/vm/utilities/globalDefinitions_gcc.hpp Wed Feb 10 14:15:17 2016 -0500
> +++ b/src/share/vm/utilities/globalDefinitions_gcc.hpp Tue Feb 16 20:32:38 2016 +0330
> @@ -78,15 +78,18 @@
> #include <asm/sigcontext.h>
> /* avoid conflicting ucontext definitions */
> #define ucontext asm_ucontext
> -struct ucontext {
> +struct custom_ucontext {
> unsigned long uc_flags;
> - struct ucontext *uc_link;
> + struct custom_ucontext *uc_link;
> stack_t uc_stack;
> struct sigcontext uc_mcontext;
> sigset_t uc_sigmask;
> };
> -
> -typedef struct ucontext ucontext_t;
> +#define ucontext_t custom_ucontext
> +typedef struct custom_ucontext ucontext_t;
> #endif //__ANDROID__
>
>
> Also in my toolchain for platform android-21 following files is missing I copied them from android-19
> asm/elf.h
> asm/user.h
>
>
> With all of this and adding:
> export CC=$ANDROID_DEVKIT/bin/arm-linux-androideabi-gcc
> export CXX=$ANDROID_DEVKIT/bin/arm-linux-androideabi-g++
> export LD=$ANDROID_DEVKIT/bin/arm-linux-androideabi-ld
> export AR=$ANDROID_DEVKIT/bin/arm-linux-androideabi-ar
> export MT=$ANDROID_DEVKIT/bin/arm-linux-androideabi-mt
> export NM=$ANDROID_DEVKIT/bin/arm-linux-androideabi-nm
> export OBJDUMP=$ANDROID_DEVKIT/bin/arm-linux-androideabi-objdump
> export RANLIB=$ANDROID_DEVKIT/bin/arm-linux-androideabi-ranlib
> export STRIP=$ANDROID_DEVKIT/bin/arm-linux-androideabi-strip
>
> I ran my Hello World program in android jvm.
>
> On Thu, Feb 11, 2016 at 10:33 PM, Bob Vandette <bob.vandette at oracle.com <mailto:bob.vandette at oracle.com>> wrote:
> The OpenJDK Mobile project was recently merged with JDK 9 build 102 and
> as of today nows has the ability to build both iOS and Android Java 9 binaries
> for execution on both x86 and arm devices.
>
> I’ve updated the iOS and Android Platform specific project pages with up to date
> build instructions.
>
> http://openjdk.java.net/projects/mobile/ios.html <http://openjdk.java.net/projects/mobile/ios.html>
> http://openjdk.java.net/projects/mobile/android.html <http://openjdk.java.net/projects/mobile/android.html>
>
> Enjoy,
> Bob Vandette
> Mobile Project Lead
>
>
>
>
>
>
>
>
> --
>
> Best Regards,
> Ali Ebrahimi
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