diff options
Diffstat (limited to 'tools/testing/selftests/mm/merge.c')
| -rw-r--r-- | tools/testing/selftests/mm/merge.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/tools/testing/selftests/mm/merge.c b/tools/testing/selftests/mm/merge.c index c76646cdf6e6..bbae66fc5038 100644 --- a/tools/testing/selftests/mm/merge.c +++ b/tools/testing/selftests/mm/merge.c @@ -2,11 +2,14 @@ #define _GNU_SOURCE #include "../kselftest_harness.h" +#include <fcntl.h> #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <sys/mman.h> +#include <sys/syscall.h> #include <sys/wait.h> +#include <linux/perf_event.h> #include "vm_util.h" FIXTURE(merge) @@ -452,4 +455,44 @@ TEST_F(merge, forked_source_vma) ASSERT_EQ(procmap->query.vma_end, (unsigned long)ptr2 + 5 * page_size); } +TEST_F(merge, handle_uprobe_upon_merged_vma) +{ + const size_t attr_sz = sizeof(struct perf_event_attr); + unsigned int page_size = self->page_size; + const char *probe_file = "./foo"; + char *carveout = self->carveout; + struct perf_event_attr attr; + unsigned long type; + void *ptr1, *ptr2; + int fd; + + fd = open(probe_file, O_RDWR|O_CREAT, 0600); + ASSERT_GE(fd, 0); + + ASSERT_EQ(ftruncate(fd, page_size), 0); + ASSERT_EQ(read_sysfs("/sys/bus/event_source/devices/uprobe/type", &type), 0); + + memset(&attr, 0, attr_sz); + attr.size = attr_sz; + attr.type = type; + attr.config1 = (__u64)(long)probe_file; + attr.config2 = 0x0; + + ASSERT_GE(syscall(__NR_perf_event_open, &attr, 0, -1, -1, 0), 0); + + ptr1 = mmap(&carveout[page_size], 10 * page_size, PROT_EXEC, + MAP_PRIVATE | MAP_FIXED, fd, 0); + ASSERT_NE(ptr1, MAP_FAILED); + + ptr2 = mremap(ptr1, page_size, 2 * page_size, + MREMAP_MAYMOVE | MREMAP_FIXED, ptr1 + 5 * page_size); + ASSERT_NE(ptr2, MAP_FAILED); + + ASSERT_NE(mremap(ptr2, page_size, page_size, + MREMAP_MAYMOVE | MREMAP_FIXED, ptr1), MAP_FAILED); + + close(fd); + remove(probe_file); +} + TEST_HARNESS_MAIN |