diff options
Diffstat (limited to 'lib/asan/lit_tests/dlclose-test.cc')
| -rw-r--r-- | lib/asan/lit_tests/dlclose-test.cc | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/lib/asan/lit_tests/dlclose-test.cc b/lib/asan/lit_tests/dlclose-test.cc index 229f508294bf0..b15895bf35791 100644 --- a/lib/asan/lit_tests/dlclose-test.cc +++ b/lib/asan/lit_tests/dlclose-test.cc @@ -9,6 +9,11 @@ // are globals. // 6. BOOM +// This sublte test assumes that after a foo.so is dlclose-d +// we can mmap the region of memory that has been occupied by the library. +// It works on i368/x86_64 Linux, but not necessary anywhere else. +// REQUIRES: x86_64-supported-target,i386-supported-target + // RUN: %clangxx_asan -m64 -O0 %p/SharedLibs/dlclose-test-so.cc \ // RUN: -fPIC -shared -o %t-so.so // RUN: %clangxx_asan -m64 -O0 %s -o %t && %t 2>&1 | FileCheck %s @@ -39,17 +44,17 @@ #include <stdio.h> #include <string.h> #include <sys/mman.h> +#include <unistd.h> #include <string> using std::string; -static const int kPageSize = 4096; - typedef int *(fun_t)(); int main(int argc, char *argv[]) { string path = string(argv[0]) + "-so.so"; + size_t PageSize = sysconf(_SC_PAGESIZE); printf("opening %s ... \n", path.c_str()); void *lib = dlopen(path.c_str(), RTLD_NOW); if (!lib) { @@ -73,8 +78,8 @@ int main(int argc, char *argv[]) { return 1; } // Now, the page where 'addr' is unmapped. Map it. - size_t page_beg = ((size_t)addr) & ~(kPageSize - 1); - void *res = mmap((void*)(page_beg), kPageSize, + size_t page_beg = ((size_t)addr) & ~(PageSize - 1); + void *res = mmap((void*)(page_beg), PageSize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON | MAP_FIXED | MAP_NORESERVE, 0, 0); if (res == (char*)-1L) { |