cutils: add ashmem_init
Add a new ashmem_init function that only dlopens libashmemd_client.
This allows the library to be preloaded in the zygote.
Test: boots, works
Bug: 129543489
Change-Id: Ie106791edf381654f085203c266c9f9c0df35cfc
diff --git a/libcutils/ashmem-dev.cpp b/libcutils/ashmem-dev.cpp
index e35b91a..e67b458 100644
--- a/libcutils/ashmem-dev.cpp
+++ b/libcutils/ashmem-dev.cpp
@@ -73,6 +73,8 @@
#ifndef __ANDROID_VNDK__
using openFdType = int (*)();
+static openFdType openFd;
+
openFdType initOpenAshmemFd() {
openFdType openFd = nullptr;
void* handle = dlopen("libashmemd_client.so", RTLD_NOW);
@@ -221,7 +223,10 @@
int fd = -1;
#ifndef __ANDROID_VNDK__
- static auto openFd = initOpenAshmemFd();
+ if (!openFd) {
+ openFd = initOpenAshmemFd();
+ }
+
if (openFd) {
fd = openFd();
}
@@ -480,3 +485,11 @@
return __ashmem_check_failure(fd, TEMP_FAILURE_RETRY(ioctl(fd, ASHMEM_GET_SIZE, NULL)));
}
+
+void ashmem_init() {
+#ifndef __ANDROID_VNDK__
+ pthread_mutex_lock(&__ashmem_lock);
+ openFd = initOpenAshmemFd();
+ pthread_mutex_unlock(&__ashmem_lock);
+#endif //__ANDROID_VNDK__
+}
diff --git a/libcutils/ashmem-host.cpp b/libcutils/ashmem-host.cpp
index bb990d5..32446d4 100644
--- a/libcutils/ashmem-host.cpp
+++ b/libcutils/ashmem-host.cpp
@@ -82,3 +82,5 @@
return buf.st_size;
}
+
+void ashmem_init() {}
diff --git a/libcutils/include/cutils/ashmem.h b/libcutils/include/cutils/ashmem.h
index d80caa6..abc5068 100644
--- a/libcutils/include/cutils/ashmem.h
+++ b/libcutils/include/cutils/ashmem.h
@@ -26,6 +26,7 @@
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);
+void ashmem_init();
#ifdef __cplusplus
}