implement posix_madvise
Bug: 18472477
Change-Id: I8183de6c281acf69ed5f7f88351b056b9827b162
diff --git a/tests/sys_mman_test.cpp b/tests/sys_mman_test.cpp
index 75ccfa3..b0e40fd 100644
--- a/tests/sys_mman_test.cpp
+++ b/tests/sys_mman_test.cpp
@@ -172,3 +172,46 @@
ASSERT_STREQ(NEWPAGE2_MSG, buf);
ASSERT_STREQ(END_MSG, buf+pagesize-sizeof(END_MSG));
}
+
+TEST(sys_mman, posix_madvise) {
+ TemporaryFile tempfile;
+ size_t pagesize = sysconf(_SC_PAGESIZE);
+ char buf[pagesize];
+
+ // Prepare environment.
+ ASSERT_EQ(static_cast<ssize_t>(pagesize), write(tempfile.fd, buf, pagesize));
+ void* map = mmap(NULL, pagesize, PROT_READ | PROT_WRITE, MAP_SHARED, tempfile.fd, 0);
+ ASSERT_NE(MAP_FAILED, map);
+
+ // Verify different options of posix_madvise.
+ ASSERT_EQ(0, posix_madvise(map, pagesize, POSIX_MADV_NORMAL));
+ ASSERT_EQ(0, posix_madvise(map, pagesize, POSIX_MADV_SEQUENTIAL));
+ ASSERT_EQ(0, posix_madvise(map, pagesize, POSIX_MADV_RANDOM));
+ ASSERT_EQ(0, posix_madvise(map, pagesize, POSIX_MADV_WILLNEED));
+
+ ASSERT_EQ(0, munmap(map, pagesize));
+}
+
+// Verify that memory can still access after posix_madvise(POSIX_MADV_DONTNEED).
+// We should test on MAP_ANONYMOUS memory to verify whether the memory is discarded,
+// because the content of non MAP_ANONYMOUS memory can be reread from file.
+TEST(sys_mman, posix_madvise_POSIX_MADV_DONTNEED) {
+ size_t pagesize = sysconf(_SC_PAGESIZE);
+
+ void* map = mmap(NULL, pagesize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+ ASSERT_NE(MAP_FAILED, map);
+
+ int* int_ptr = reinterpret_cast<int*>(map);
+ for (int i = 0; i < static_cast<int>(pagesize / sizeof(int)); ++i) {
+ *int_ptr++ = i;
+ }
+
+ ASSERT_EQ(0, posix_madvise(map, pagesize, POSIX_MADV_DONTNEED));
+
+ int_ptr = reinterpret_cast<int*>(map);
+ for (int i = 0; i < static_cast<int>(pagesize / sizeof(int)); ++i) {
+ ASSERT_EQ(i, *int_ptr++);
+ }
+
+ ASSERT_EQ(0, munmap(map, pagesize));
+}
diff --git a/tests/unistd_test.cpp b/tests/unistd_test.cpp
index 34b7bf3..b37687f 100644
--- a/tests/unistd_test.cpp
+++ b/tests/unistd_test.cpp
@@ -523,6 +523,7 @@
// Verify according to POSIX.1-2008.
EXPECT_EQ(200809L, _POSIX_VERSION);
+ EXPECT_EQ(_POSIX_VERSION, _POSIX_ADVISORY_INFO);
EXPECT_GT(_POSIX_AIO_LISTIO_MAX, 0);
EXPECT_GT(_POSIX_AIO_MAX, 0);
EXPECT_GT(_POSIX_ARG_MAX, 0);
@@ -611,8 +612,7 @@
#if defined(__BIONIC__)
// These tests only pass on bionic, as bionic and glibc has different support on these macros.
- // Macros like _POSIX_ADVISORY_INFO are not supported on bionic yet.
- EXPECT_EQ(-1, _POSIX_ADVISORY_INFO);
+ // Macros like _POSIX_ASYNCHRONOUS_IO are not supported on bionic yet.
EXPECT_EQ(-1, _POSIX_ASYNCHRONOUS_IO);
EXPECT_EQ(-1, _POSIX_BARRIERS);
EXPECT_EQ(-1, _POSIX_MESSAGE_PASSING);
@@ -658,6 +658,7 @@
}
TEST(unistd, sysconf) {
+ VERIFY_SYSCONF_POSIX_VERSION(_SC_ADVISORY_INFO);
VERIFY_SYSCONF_POSITIVE(_SC_ARG_MAX);
VERIFY_SYSCONF_POSITIVE(_SC_BC_BASE_MAX);
VERIFY_SYSCONF_POSITIVE(_SC_BC_DIM_MAX);
@@ -773,7 +774,6 @@
#if defined(__BIONIC__)
// Tests can only run on bionic, as bionic and glibc have different support for these options.
// Below options are not supported on bionic yet.
- VERIFY_SYSCONF_NOT_SUPPORT(_SC_ADVISORY_INFO);
VERIFY_SYSCONF_NOT_SUPPORT(_SC_ASYNCHRONOUS_IO);
VERIFY_SYSCONF_NOT_SUPPORT(_SC_BARRIERS);
VERIFY_SYSCONF_NOT_SUPPORT(_SC_MESSAGE_PASSING);