index 57067d70f1511bd0cadd4c439828b3461220d575..b0e40fdd620cec5b25ec5281c9726c825923d883 100644 (file)
--- a/tests/sys_mman_test.cpp
+++ b/tests/sys_mman_test.cpp
#include <gtest/gtest.h>
#include <sys/mman.h>
+#include <sys/types.h>
#include <unistd.h>
-TEST(sys_mman, mmap_negative) {
- off_t off = -sysconf(_SC_PAGESIZE); // Aligned but negative.
- ASSERT_EQ(MAP_FAILED, mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_ANON|MAP_PRIVATE, -1, off));
+#include "TemporaryFile.h"
+
+TEST(sys_mman, mmap_std) {
+ void* map = mmap(NULL, 4096, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0);
+ ASSERT_NE(MAP_FAILED, map);
+ ASSERT_EQ(0, munmap(map, 4096));
+}
+
+TEST(sys_mman, mmap64_std) {
+ void* map = mmap64(NULL, 4096, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0);
+ ASSERT_NE(MAP_FAILED, map);
+ ASSERT_EQ(0, munmap(map, 4096));
+}
+
+TEST(sys_mman, mmap_file_bad_offset) {
+ TemporaryFile tf;
+
+ void* map = mmap(NULL, 100, PROT_READ, MAP_SHARED, tf.fd, 1);
+ ASSERT_EQ(MAP_FAILED, map);
+}
+
+TEST(sys_mman, mmap64_file_bad_offset) {
+ TemporaryFile tf;
+
+ void* map = mmap64(NULL, 100, PROT_READ, MAP_SHARED, tf.fd, 1);
+ ASSERT_EQ(MAP_FAILED, map);
+}
+
+#define STR_SSIZE(str) static_cast<ssize_t>(sizeof(str))
+
+#define STRING_MSG "012345678\nabcdefgh\n"
+#define INITIAL_MSG "000000000\n00000000\n"
+
+TEST(sys_mman, mmap_file_read) {
+ TemporaryFile tf;
+
+ ASSERT_EQ(STR_SSIZE(STRING_MSG), write(tf.fd, STRING_MSG, sizeof(STRING_MSG)));
+
+ void* map = mmap(NULL, sizeof(STRING_MSG), PROT_READ, MAP_SHARED, tf.fd, 0);
+ ASSERT_NE(MAP_FAILED, map);
+
+ char* data = reinterpret_cast<char*>(map);
+ ASSERT_STREQ(STRING_MSG, data);
+
+ ASSERT_EQ(0, munmap(map, sizeof(STRING_MSG)));
+}
+
+TEST(sys_mman, mmap_file_write) {
+ TemporaryFile tf;
+
+ ASSERT_EQ(STR_SSIZE(INITIAL_MSG), write(tf.fd, INITIAL_MSG, sizeof(INITIAL_MSG)));
+ lseek(tf.fd, 0, SEEK_SET);
+
+ void* map = mmap(NULL, sizeof(STRING_MSG), PROT_WRITE, MAP_SHARED, tf.fd, 0);
+ ASSERT_NE(MAP_FAILED, map);
+ close(tf.fd);
+
+ memcpy(map, STRING_MSG, sizeof(STRING_MSG));
+
+ ASSERT_EQ(0, munmap(map, sizeof(STRING_MSG)));
+
+ tf.reopen();
+ char buf[sizeof(STRING_MSG)];
+ memset(buf, 0, sizeof(STRING_MSG));
+ ASSERT_EQ(STR_SSIZE(STRING_MSG), read(tf.fd, buf, sizeof(STRING_MSG)));
+
+ ASSERT_STREQ(STRING_MSG, buf);
+}
+
+#define PAGE0_MSG "00PAGE00"
+#define PAGE1_MSG "111PAGE111"
+#define PAGE2_MSG "2222PAGE2222"
+#define END_MSG "E"
+
+TEST(sys_mman, mmap_file_read_at_offset) {
+ TemporaryFile tf;
+ size_t pagesize = sysconf(_SC_PAGESIZE);
+
+ // Create the file with three pages worth of data.
+ ASSERT_EQ(STR_SSIZE(PAGE0_MSG), write(tf.fd, PAGE0_MSG, sizeof(PAGE0_MSG)));
+ ASSERT_NE(-1, lseek(tf.fd, pagesize, SEEK_SET));
+ ASSERT_EQ(STR_SSIZE(PAGE1_MSG), write(tf.fd, PAGE1_MSG, sizeof(PAGE1_MSG)));
+ ASSERT_NE(-1, lseek(tf.fd, 2 * pagesize, SEEK_SET));
+ ASSERT_EQ(STR_SSIZE(PAGE2_MSG), write(tf.fd, PAGE2_MSG, sizeof(PAGE2_MSG)));
+ ASSERT_NE(-1, lseek(tf.fd, 3 * pagesize - sizeof(END_MSG), SEEK_SET));
+ ASSERT_EQ(STR_SSIZE(END_MSG), write(tf.fd, END_MSG, sizeof(END_MSG)));
+
+ ASSERT_NE(-1, lseek(tf.fd, 0, SEEK_SET));
+
+ void* map = mmap(NULL, pagesize, PROT_READ, MAP_SHARED, tf.fd, pagesize);
+ ASSERT_NE(MAP_FAILED, map);
+
+ char* data = reinterpret_cast<char*>(map);
+ ASSERT_STREQ(PAGE1_MSG, data);
+
+ ASSERT_EQ(0, munmap(map, pagesize));
+
+ map = mmap(NULL, pagesize, PROT_READ, MAP_SHARED, tf.fd, 2 * pagesize);
+ ASSERT_NE(MAP_FAILED, map);
+
+ data = reinterpret_cast<char*>(map);
+ ASSERT_STREQ(PAGE2_MSG, data);
+ ASSERT_STREQ(END_MSG, data+pagesize-sizeof(END_MSG));
+
+ ASSERT_EQ(0, munmap(map, pagesize));
+}
+
+#define NEWPAGE1_MSG "1NEW1PAGE1"
+#define NEWPAGE2_MSG "22NEW22PAGE22"
+
+TEST(sys_mman, mmap_file_write_at_offset) {
+ TemporaryFile tf;
+ size_t pagesize = sysconf(_SC_PAGESIZE);
+
+ // Create the file with three pages worth of data.
+ ASSERT_EQ(STR_SSIZE(PAGE0_MSG), write(tf.fd, PAGE0_MSG, sizeof(PAGE0_MSG)));
+ ASSERT_NE(-1, lseek(tf.fd, pagesize, SEEK_SET));
+ ASSERT_EQ(STR_SSIZE(PAGE1_MSG), write(tf.fd, PAGE1_MSG, sizeof(PAGE1_MSG)));
+ ASSERT_NE(-1, lseek(tf.fd, 2 * pagesize, SEEK_SET));
+ ASSERT_EQ(STR_SSIZE(PAGE2_MSG), write(tf.fd, PAGE2_MSG, sizeof(PAGE2_MSG)));
+ ASSERT_NE(-1, lseek(tf.fd, 3 * pagesize - sizeof(END_MSG), SEEK_SET));
+ ASSERT_EQ(STR_SSIZE(END_MSG), write(tf.fd, END_MSG, sizeof(END_MSG)));
+
+ ASSERT_NE(-1, lseek(tf.fd, 0, SEEK_SET));
+
+ void* map = mmap(NULL, pagesize, PROT_WRITE, MAP_SHARED, tf.fd, pagesize);
+ ASSERT_NE(MAP_FAILED, map);
+ close(tf.fd);
+
+ memcpy(map, NEWPAGE1_MSG, sizeof(NEWPAGE1_MSG));
+ ASSERT_EQ(0, munmap(map, pagesize));
+
+ tf.reopen();
+ map = mmap(NULL, pagesize, PROT_WRITE, MAP_SHARED, tf.fd, 2 * pagesize);
+ ASSERT_NE(MAP_FAILED, map);
+ close(tf.fd);
+
+ memcpy(map, NEWPAGE2_MSG, sizeof(NEWPAGE2_MSG));
+ ASSERT_EQ(0, munmap(map, pagesize));
+
+ tf.reopen();
+ char buf[pagesize];
+ ASSERT_EQ(static_cast<ssize_t>(pagesize), read(tf.fd, buf, pagesize));
+ ASSERT_STREQ(PAGE0_MSG, buf);
+ ASSERT_NE(-1, lseek(tf.fd, pagesize, SEEK_SET));
+ ASSERT_EQ(static_cast<ssize_t>(pagesize), read(tf.fd, buf, pagesize));
+ ASSERT_STREQ(NEWPAGE1_MSG, buf);
+ ASSERT_NE(-1, lseek(tf.fd, 2 * pagesize, SEEK_SET));
+ ASSERT_EQ(static_cast<ssize_t>(pagesize), read(tf.fd, buf, pagesize));
+ 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));
}
-TEST(sys_mman, mmap64_negative) {
- off64_t off64 = -sysconf(_SC_PAGESIZE); // Aligned but negative.
- ASSERT_EQ(MAP_FAILED, mmap64(NULL, 4096, PROT_READ|PROT_WRITE, MAP_ANON|MAP_PRIVATE, -1, off64));
+// 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));
}