cfi: Start testing CFI in both standalone and devirtualization modes.

Differential Revision: http://reviews.llvm.org/D21123

llvm-svn: 273758

compiler-rt/test/cfi/CMakeLists.txt

@@ -1,6 +1,13 @@
+set(CFI_LIT_TEST_MODE Standalone)
 configure_lit_site_cfg(
   ${CMAKE_CURRENT_SOURCE_DIR}/lit.site.cfg.in
-  ${CMAKE_CURRENT_BINARY_DIR}/lit.site.cfg
+  ${CMAKE_CURRENT_BINARY_DIR}/Standalone/lit.site.cfg
+  )
+
+set(CFI_LIT_TEST_MODE Devirt)
+configure_lit_site_cfg(
+  ${CMAKE_CURRENT_SOURCE_DIR}/lit.site.cfg.in
+  ${CMAKE_CURRENT_BINARY_DIR}/Devirt/lit.site.cfg
   )
 
 set(CFI_TEST_DEPS ${SANITIZER_COMMON_LIT_TEST_DEPS})
@@ -32,11 +39,13 @@ if(NOT COMPILER_RT_STANDALONE_BUILD)
 endif()
 
 add_lit_testsuite(check-cfi "Running the cfi regression tests"
-  ${CMAKE_CURRENT_BINARY_DIR}
+  ${CMAKE_CURRENT_BINARY_DIR}/Standalone
+  ${CMAKE_CURRENT_BINARY_DIR}/Devirt
   DEPENDS ${CFI_TEST_DEPS})
 
 add_lit_target(check-cfi-and-supported "Running the cfi regression tests"
-  ${CMAKE_CURRENT_BINARY_DIR}
+  ${CMAKE_CURRENT_BINARY_DIR}/Standalone
+  ${CMAKE_CURRENT_BINARY_DIR}/Devirt
   PARAMS check_supported=1
   DEPENDS ${CFI_TEST_DEPS})
 

compiler-rt/test/cfi/lit.cfg

@@ -11,6 +11,14 @@ config.substitutions.append((r"%clang ", ' '.join([config.clang]) + ' '))
 config.substitutions.append((r"%clangxx ", clangxx + ' '))
 if config.lto_supported:
   clang_cfi = ' '.join(config.lto_launch + [config.clang] + config.lto_flags + ['-flto -fsanitize=cfi '])
+
+  if config.cfi_lit_test_mode == "Devirt":
+    config.available_features.add('devirt')
+    clang_cfi += '-fwhole-program-vtables '
+    config.substitutions.append((r"%expect_crash_unless_devirt ", ""))
+  else:
+    config.substitutions.append((r"%expect_crash_unless_devirt ", config.expect_crash))
+
   cxx = ' '.join(config.cxx_mode_flags) + ' '
   diag = '-fno-sanitize-trap=cfi -fsanitize-recover=cfi '
   non_dso = '-fvisibility=hidden '

compiler-rt/test/cfi/lit.site.cfg.in

@@ -1,4 +1,6 @@
 @LIT_SITE_CFG_IN_HEADER@
 
+config.cfi_lit_test_mode = "@CFI_LIT_TEST_MODE@"
+
 lit_config.load_config(config, "@COMPILER_RT_BINARY_DIR@/test/lit.common.configured")
 lit_config.load_config(config, "@CMAKE_CURRENT_SOURCE_DIR@/lit.cfg")

compiler-rt/test/cfi/overwrite.cpp

@@ -1,5 +1,5 @@
 // RUN: %clangxx_cfi -o %t1 %s
-// RUN: %expect_crash %t1 2>&1 | FileCheck --check-prefix=CFI %s
+// RUN: %expect_crash_unless_devirt %t1 2>&1 | FileCheck --check-prefix=CFI %s
 
 // RUN: %clangxx_cfi -DB32 -o %t2 %s
 // RUN: %expect_crash %t2 2>&1 | FileCheck --check-prefix=CFI %s
@@ -55,7 +55,10 @@ int main() {
   // CFI-DIAG-NEXT: note: invalid vtable
   a->f();
 
-  // CFI-NOT: {{^2$}}
+  // We don't check for the absence of a 2 here because under devirtualization
+  // our virtual call may be devirtualized and we will proceed with execution
+  // rather than crashing.
+
   // NCFI: {{^2$}}
   fprintf(stderr, "2\n");
 }

compiler-rt/test/cfi/stats.cpp

@@ -2,6 +2,9 @@
 // RUN: env SANITIZER_STATS_PATH=%t.stats %t
 // RUN: sanstats %t.stats | FileCheck %s
 
+// FIXME: We currently emit the wrong debug info under devirtualization.
+// UNSUPPORTED: devirt
+
 struct ABase {};
 
 struct A : ABase {

compiler-rt/test/lit.common.cfg

@@ -92,9 +92,11 @@ if config.host_os == 'Windows':
   # does not crash but exits with a non-zero exit code. We ought to merge
   # KillTheDoctor and not --crash to make the latter more useful and remove the
   # need for this substitution.
-  config.substitutions.append( ("%expect_crash ", "not KillTheDoctor ") )
+  config.expect_crash = "not KillTheDoctor "
 else:
-  config.substitutions.append( ("%expect_crash ", "not --crash ") )
+  config.expect_crash = "not --crash "
+
+config.substitutions.append( ("%expect_crash ", config.expect_crash) )
 
 target_arch = getattr(config, 'target_arch', None)
 if target_arch: