diff options
Diffstat (limited to 'test/ubsan/TestCases/TypeCheck/Linux')
-rw-r--r-- | test/ubsan/TestCases/TypeCheck/Linux/PR33221.cpp | 50 | ||||
-rw-r--r-- | test/ubsan/TestCases/TypeCheck/Linux/lit.local.cfg | 9 |
2 files changed, 59 insertions, 0 deletions
diff --git a/test/ubsan/TestCases/TypeCheck/Linux/PR33221.cpp b/test/ubsan/TestCases/TypeCheck/Linux/PR33221.cpp new file mode 100644 index 000000000..a5e61c2d2 --- /dev/null +++ b/test/ubsan/TestCases/TypeCheck/Linux/PR33221.cpp @@ -0,0 +1,50 @@ +// RUN: %clangxx -std=c++11 -frtti -fsanitize=vptr -g %s -O3 -o %t +// RUN: %run %t &> %t.log +// RUN: cat %t.log | not count 0 && FileCheck --input-file %t.log %s || cat %t.log | count 0 + +// REQUIRES: cxxabi + +#include <sys/mman.h> +#include <unistd.h> + +class Base { +public: + int i; + virtual void print() {} +}; + +class Derived : public Base { +public: + void print() {} +}; + + +int main() { + int page_size = getpagesize(); + + void *non_accessible = mmap(nullptr, page_size * 2, PROT_NONE, + MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); + + if (non_accessible == MAP_FAILED) + return 0; + + void *accessible = mmap((char*)non_accessible + page_size, page_size, + PROT_READ | PROT_WRITE, + MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); + if (accessible == MAP_FAILED) + return 0; + + char *c = new char[sizeof(Derived)]; + + // The goal is to trigger a condition when Vptr points to accessible memory, + // but VptrPrefix does not. That has been triggering SIGSEGV in UBSan code. + void **vtable_ptr = reinterpret_cast<void **>(c); + *vtable_ptr = (void*)accessible; + + Derived *list = (Derived *)c; + +// CHECK: PR33221.cpp:[[@LINE+2]]:19: runtime error: member access within address {{.*}} which does not point to an object of type 'Base' +// CHECK-NEXT: invalid vptr + int foo = list->i; + return 0; +} diff --git a/test/ubsan/TestCases/TypeCheck/Linux/lit.local.cfg b/test/ubsan/TestCases/TypeCheck/Linux/lit.local.cfg new file mode 100644 index 000000000..57271b807 --- /dev/null +++ b/test/ubsan/TestCases/TypeCheck/Linux/lit.local.cfg @@ -0,0 +1,9 @@ +def getRoot(config): + if not config.parent: + return config + return getRoot(config.parent) + +root = getRoot(config) + +if root.host_os not in ['Linux']: + config.unsupported = True |