[ASan] Make dyld_insert_libraries_reexec work with internal shell

This test was doing some feature checks within the test itself. This patch
rewrites the feature checks to be done in a fashion more idiomatic to lit,
as the internal shell does not support the features needed for the previous
feature checks.

Reviewers: ndrewh, DanBlackwell, fmayer

Reviewed By: ndrewh

Pull Request: #168655

Author: boomanaiden154

compiler-rt/test/asan/TestCases/Darwin/dyld_insert_libraries_reexec.cpp

@@ -14,23 +14,12 @@
 // RUN:       %run %t/a.out 2>&1 \
 // RUN:   | FileCheck %s
 
-// RUN: MACOS_MAJOR=$(sw_vers -productVersion | cut -d'.' -f1)
-// RUN: MACOS_MINOR=$(sw_vers -productVersion | cut -d'.' -f2)
-
-// RUN: IS_MACOS_10_11_OR_HIGHER=$([ $MACOS_MAJOR -eq 10 ] && [ $MACOS_MINOR -lt 11 ]; echo $?)
-
 // On OS X 10.10 and lower, if the dylib is not DYLD-inserted, ASan will re-exec.
-// RUN: if [ $IS_MACOS_10_11_OR_HIGHER == 0 ]; then \
-// RUN:   %env_asan_opts=verbosity=1 %run %t/a.out 2>&1 \
-// RUN:   | FileCheck --check-prefix=CHECK-NOINSERT %s; \
-// RUN:   fi
+// RUN: %if mac-os-10-11-or-higher %{ %env_asan_opts=verbosity=1 %run %t/a.out 2>&1 | FileCheck --check-prefix=CHECK-NOINSERT %s %}
 
 // On OS X 10.11 and higher, we don't need to DYLD-insert anymore, and the interceptors
 // still installed correctly. Let's just check that things work and we don't try to re-exec.
-// RUN: if [ $IS_MACOS_10_11_OR_HIGHER == 1 ]; then \
-// RUN:   %env_asan_opts=verbosity=1 %run %t/a.out 2>&1 \
-// RUN:   | FileCheck %s; \
-// RUN:   fi
+// RUN: %if mac-os-10-10-or-lower %{ %env_asan_opts=verbosity=1 %run %t/a.out 2>&1 | FileCheck %s %}
 
 #include <stdio.h>
 

compiler-rt/test/asan/TestCases/Darwin/lit.local.cfg.py

@@ -1,3 +1,6 @@
+import subprocess
+
+
 def getRoot(config):
     if not config.parent:
         return config
@@ -8,3 +11,26 @@ def getRoot(config):
 
 if root.target_os not in ["Darwin"]:
     config.unsupported = True
+
+
+def get_product_version():
+    try:
+        version_process = subprocess.run(
+            ["sw_vers", "-productVersion"],
+            check=True,
+            stdout=subprocess.PIPE,
+            stderr=subprocess.PIPE,
+        )
+        version_string = version_process.stdout.decode("utf-8").split("\n")[0]
+        version_split = version_string.split(".")
+        return (int(version_split[0]), int(version_split[1]))
+    except:
+        return (0, 0)
+
+
+macos_version_major, macos_version_minor = get_product_version()
+if config.apple_platform == "osx":
+    if macos_version_major > 10 and macos_version_minor > 11:
+        config.available_features.add("mac-os-10-11-or-higher")
+    else:
+        config.available_features.add("mac-os-10-10-or-lower")