[android] android targetSdkVersion 29 ashmem issue

android/build.gradle

@@ -53,9 +53,9 @@ subprojects {
     }
 }
 ext {
-    compileSdkVersion=28
+    compileSdkVersion=29
     minSdkVersion=14
-    targetSdkVersion=28
+    targetSdkVersion=29
     supportLibVersion="28.0.0"
     fastjsonLibVersion="1.1.70.android"
     //Default value for disableCov is false

weex_core/Source/third_party/IPC/ashmem.c

@@ -16,11 +16,6 @@
  * specific language governing permissions and limitations
  * under the License.
  */
-/*
- * Implementation of the user-space ashmem API for devices, which have our
- * ashmem-enabled kernel. See ashmem-sim.c for the "fake" tmp-based version,
- * used by the simulator.
- */
 
 #include <fcntl.h>
 #include <string.h>
@@ -31,17 +26,53 @@
 
 #include "ashmem.h"
 #include <linux/ashmem.h>
+#include <stdlib.h>
+#include <sys/system_properties.h>
+#include <dlfcn.h>
+#include <pthread.h>
 
 #define ASHMEM_DEVICE "/dev/ashmem"
 
+static int system_property_get_int(const char* name) {
+    int result = 0;
+    char value[PROP_VALUE_MAX] = {};
+    if (__system_property_get(name, value) >= 1)
+        result = atoi(value);
+    return result;
+}
+
+static int device_api_level() {
+    static int s_api_level = -1;
+    if (s_api_level < 0)
+        s_api_level = system_property_get_int("ro.build.version.sdk");
+    return s_api_level;
+}
+
+typedef int(*ASharedMemory_createFunc)(const char *, size_t);
+typedef size_t(*ASharedMemory_getSizeFunc)(int fd);
+typedef int(*ASharedMemory_setProtFunc)(int fd, int prot);
+
+// Function pointers to shared memory functions.
+typedef struct {
+    ASharedMemory_createFunc create;
+    ASharedMemory_getSizeFunc getSize;
+    ASharedMemory_setProtFunc setProt;
+} ASharedMemoryFuncs;
+
+static ASharedMemoryFuncs s_ashmem_funcs = {
+        NULL, NULL, NULL
+};
+static pthread_once_t s_ashmem_funcs_once = PTHREAD_ONCE_INIT;
+
+
 /*
  * ashmem_create_region - creates a new ashmem region and returns the file
  * descriptor, or <0 on error
  *
  * `name' is an optional label to give the region (visible in /proc/pid/maps)
  * `size' is the size of the region, in page-aligned bytes
  */
-int ashmem_create_region(const char* name, size_t size)
+static int ashmem_dev_create_region(const char* name, size_t size)
 {
     int fd, ret;
 
@@ -69,34 +100,56 @@ int ashmem_create_region(const char* name, size_t size)
     return ret;
 }
 
-int ashmem_set_prot_region(int fd, int prot)
+static int ashmem_dev_set_prot_region(int fd, int prot)
 {
     return ioctl(fd, ASHMEM_SET_PROT_MASK, prot);
 }
 
-int ashmem_pin_region(int fd, size_t offset, size_t len)
+static size_t ashmem_dev_get_size_region(int fd)
 {
-    struct ashmem_pin pin = { offset, len };
-    return ioctl(fd, ASHMEM_PIN, &pin);
+    return (size_t)ioctl(fd, ASHMEM_GET_SIZE, NULL);
 }
 
-int ashmem_unpin_region(int fd, size_t offset, size_t len)
-{
-    struct ashmem_pin pin = { offset, len };
-    return ioctl(fd, ASHMEM_UNPIN, &pin);
+static void ashmem_init_funcs() {
+    ASharedMemoryFuncs* funcs = &s_ashmem_funcs;
+    // ANDROID_API_Q
+    if (device_api_level() >= 29) {
+        void * lib = dlopen("libandroid.so", RTLD_NOW);
+        funcs->create =
+                (ASharedMemory_createFunc)dlsym(lib, "ASharedMemory_create");
+        funcs->getSize =
+                (ASharedMemory_getSizeFunc)dlsym(lib, "ASharedMemory_getSize");
+        funcs->setProt =
+                (ASharedMemory_setProtFunc)dlsym(lib, "ASharedMemory_setProt");
+    }
+
+    if(funcs->create == NULL) {
+        funcs->create = &ashmem_dev_create_region;
+    }
+    if(funcs->getSize == NULL) {
+        funcs->getSize = &ashmem_dev_get_size_region;
+    }
+    if(funcs->setProt == NULL) {
+        funcs->setProt = &ashmem_dev_set_prot_region;
+    }
 }
 
-int ashmem_get_size_region(int fd)
-{
-    return ioctl(fd, ASHMEM_GET_SIZE, NULL);
+static const ASharedMemoryFuncs* ashmem_get_funcs() {
+    pthread_once(&s_ashmem_funcs_once, ashmem_init_funcs);
+    return &s_ashmem_funcs;
 }
 
-int ashmem_purge_all(void)
+int ashmem_create_region(const char *name, size_t size)
+ {
+    return ashmem_get_funcs()->create(name, size);
+}
+
+int ashmem_set_prot_region(int fd, int prot)
 {
-    const int fd = open(ASHMEM_DEVICE, O_RDWR);
-    if (fd < 0)
-        return fd;
-    const int ret = ioctl(fd, ASHMEM_PURGE_ALL_CACHES, 0);
-    close(fd);
-    return ret;
+    return ashmem_get_funcs()->setProt(fd, prot);
 }
+
+int ashmem_get_size_region(int fd)
+{
+    return (int)ashmem_get_funcs()->getSize(fd);
+}

weex_core/Source/third_party/IPC/ashmem.h

@@ -33,10 +33,7 @@ extern "C" {
 
 int ashmem_create_region(const char* name, size_t size);
 int ashmem_set_prot_region(int fd, int prot);
-int ashmem_pin_region(int fd, size_t offset, size_t len);
-int ashmem_unpin_region(int fd, size_t offset, size_t len);
 int ashmem_get_size_region(int fd);
-int ashmem_purge_all(void);
 
 #ifdef __cplusplus
 }