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Merge "libcutils: Implement ashmem_valid on host." am: 915521c7d8 am: dedee60d25 am: 74984481ab am: d3c0e89fbc

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am: 755e9eaafc

Change-Id: Ia8dd21d27eb9178e43be920bec233cb2b2775eee
This commit is contained in:
Steven Moreland 2019-09-05 10:06:21 -07:00 • committed by android-build-merger
commit 4ca51f2e08
1 changed files with 24 additions and 12 deletions
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36
libcutils/ashmem-host.cpp
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@ -34,6 +34,29 @@
#include <utils/Compat.h>
static bool ashmem_validate_stat(int fd, struct stat* buf) {
int result = fstat(fd, buf);
if (result == -1) {
return false;
}
/*
* Check if this is an "ashmem" region.
* TODO: This is very hacky, and can easily break.
* We need some reliable indicator.
*/
if (!(buf->st_nlink == 0 && S_ISREG(buf->st_mode))) {
errno = ENOTTY;
return false;
}
return true;
}
int ashmem_valid(int fd) {
struct stat buf;
return ashmem_validate_stat(fd, &buf);
}
int ashmem_create_region(const char* /*ignored*/, size_t size) {
char pattern[PATH_MAX];
snprintf(pattern, sizeof(pattern), "/tmp/android-ashmem-%d-XXXXXXXXX", getpid());
@ -65,18 +88,7 @@ int ashmem_unpin_region(int /*fd*/, size_t /*offset*/, size_t /*len*/) {
int ashmem_get_size_region(int fd)
{
struct stat buf;
int result = fstat(fd, &buf);
if (result == -1) {
return -1;
}
/*
* Check if this is an "ashmem" region.
* TODO: This is very hacky, and can easily break.
* We need some reliable indicator.
*/
if (!(buf.st_nlink == 0 && S_ISREG(buf.st_mode))) {
errno = ENOTTY;
if (!ashmem_validate_stat(fd, &buf)) {
return -1;
}