Use %env_asan_opts= substitution instead of 'env ASAN_OPTIONS=$ASAN_OPTIONS'

[rnk]

Summary

The lit internal shell is used by default on Windows, and it does not support
bash variable expansion. Because bash variable expansion interacts with
tokenization, it is prohibitively difficult to make the existing lit shell do
general shell variable expansion.

The most common use of shell variables in the asan tests is to add options to
the default set of options set by lit.cfg. We can avoid the need for variable
expansion with a substitution that expands to 'env ASAN_OPTIONS=<defaults:>'.

This has the side benefit of shortening the RUN lines, so it seemed better than
implementing limited variable expansion in lit.

[rnk]

• Revert lsan change

[samsonov]

LGTM with an important note.

test/asan/lit.cfg

38

Please make sure ASAN_OPTIONS environment variable is only set on Darwin. On Linux we still want to test the "default configuration", i.e. when there are no extra env variables set at all.

[filcab]

Thanks! Are you planning on doing this for the other sanitizers?

[rnk]

In D11982#223341, @filcab wrote:

Thanks! Are you planning on doing this for the other sanitizers?

For every sanitizer that we port to Windows, yes, eventually. It's going to take a while to port tsan and msan, though, so I don't see any reason to make this change now.

test/asan/TestCases/allocator_returns_null.cc

 // Test the behavior of malloc/calloc/realloc when the allocation size is huge.
 // By default (allocator_may_return_null=0) the process should crash.
 // With allocator_may_return_null=1 the allocator should return 0.
 //
 // RUN: %clangxx_asan -O0 %s -o %t
 // RUN: not %run %t malloc 2>&1 | FileCheck %s --check-prefix=CHECK-mCRASH
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:allocator_may_return_null=0 not %run %t malloc 2>&1 | FileCheck %s --check-prefix=CHECK-mCRASH
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:allocator_may_return_null=1     %run %t malloc 2>&1 | FileCheck %s --check-prefix=CHECK-mNULL
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:allocator_may_return_null=0 not %run %t calloc 2>&1 | FileCheck %s --check-prefix=CHECK-cCRASH
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:allocator_may_return_null=1     %run %t calloc 2>&1 | FileCheck %s --check-prefix=CHECK-cNULL
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:allocator_may_return_null=0 not %run %t calloc-overflow 2>&1 | FileCheck %s --check-prefix=CHECK-coCRASH
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:allocator_may_return_null=1     %run %t calloc-overflow 2>&1 | FileCheck %s --check-prefix=CHECK-coNULL
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:allocator_may_return_null=0 not %run %t realloc 2>&1 | FileCheck %s --check-prefix=CHECK-rCRASH
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:allocator_may_return_null=1     %run %t realloc 2>&1 | FileCheck %s --check-prefix=CHECK-rNULL
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:allocator_may_return_null=0 not %run %t realloc-after-malloc 2>&1 | FileCheck %s --check-prefix=CHECK-mrCRASH
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:allocator_may_return_null=1     %run %t realloc-after-malloc 2>&1 | FileCheck %s --check-prefix=CHECK-mrNULL
+// RUN: %env_asan_opts=allocator_may_return_null=0 not %run %t malloc 2>&1 | FileCheck %s --check-prefix=CHECK-mCRASH
+// RUN: %env_asan_opts=allocator_may_return_null=1     %run %t malloc 2>&1 | FileCheck %s --check-prefix=CHECK-mNULL
+// RUN: %env_asan_opts=allocator_may_return_null=0 not %run %t calloc 2>&1 | FileCheck %s --check-prefix=CHECK-cCRASH
+// RUN: %env_asan_opts=allocator_may_return_null=1     %run %t calloc 2>&1 | FileCheck %s --check-prefix=CHECK-cNULL
+// RUN: %env_asan_opts=allocator_may_return_null=0 not %run %t calloc-overflow 2>&1 | FileCheck %s --check-prefix=CHECK-coCRASH
+// RUN: %env_asan_opts=allocator_may_return_null=1     %run %t calloc-overflow 2>&1 | FileCheck %s --check-prefix=CHECK-coNULL
+// RUN: %env_asan_opts=allocator_may_return_null=0 not %run %t realloc 2>&1 | FileCheck %s --check-prefix=CHECK-rCRASH
+// RUN: %env_asan_opts=allocator_may_return_null=1     %run %t realloc 2>&1 | FileCheck %s --check-prefix=CHECK-rNULL
+// RUN: %env_asan_opts=allocator_may_return_null=0 not %run %t realloc-after-malloc 2>&1 | FileCheck %s --check-prefix=CHECK-mrCRASH
+// RUN: %env_asan_opts=allocator_may_return_null=1     %run %t realloc-after-malloc 2>&1 | FileCheck %s --check-prefix=CHECK-mrNULL
 
 #include <limits.h>
 #include <stdlib.h>
 #include <string.h>
 #include <stdio.h>
 #include <assert.h>
 #include <limits>
 int main(int argc, char **argv) {

test/asan/TestCases/asan_and_llvm_coverage_test.cc

 // RUN: %clangxx_asan -coverage -O0 %s -o %t
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:check_initialization_order=1 %run %t 2>&1 | FileCheck %s
+// RUN: %env_asan_opts=check_initialization_order=1 %run %t 2>&1 | FileCheck %s
 // XFAIL: android
 #include <stdio.h>
 int foo() { return 1; }
 int XXX = foo();
 int main() {
   printf("PASS\n");
 // CHECK: PASS
 }

test/asan/TestCases/asan_options-help.cc

 // RUN: %clangxx_asan -O0 %s -o %t
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:help=1 %run %t 2>&1 | FileCheck %s
+// RUN: %env_asan_opts=help=1 %run %t 2>&1 | FileCheck %s
 
 int main() {
 }
 
 // CHECK: Available flags for AddressSanitizer:
 // CHECK-DAG: handle_segv
 // CHECK-DAG: check_initialization_order

test/asan/TestCases/atexit_stats.cc

 // Make sure we report atexit stats.
 // RUN: %clangxx_asan -O3 %s -o %t
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:atexit=1:print_stats=1 %run %t 2>&1 | FileCheck %s
+// RUN: %env_asan_opts=atexit=1:print_stats=1 %run %t 2>&1 | FileCheck %s
 //
 // No atexit output on Android due to
 // https://code.google.com/p/address-sanitizer/issues/detail?id=263
 // XFAIL: android
 
 #include <stdlib.h>
 #if !defined(__APPLE__) && !defined(__FreeBSD__)
 #include <malloc.h>
 #endif
 int *p1 = (int*)malloc(900);
 int *p2 = (int*)malloc(90000);
 int *p3 = (int*)malloc(9000000);
 int main() { }
 
 // CHECK: AddressSanitizer exit stats:

test/asan/TestCases/atoi_strict.c

 // Test strict_string_checks option in atoi function
 // RUN: %clang_asan %s -o %t
 // RUN: %run %t test1 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=false %run %t test1 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=true not %run %t test1 2>&1 | FileCheck %s --check-prefix=CHECK1
+// RUN: %env_asan_opts=strict_string_checks=false %run %t test1 2>&1
+// RUN: %env_asan_opts=strict_string_checks=true not %run %t test1 2>&1 | FileCheck %s --check-prefix=CHECK1
 // RUN: %run %t test2 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=false %run %t test2 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=true not %run %t test2 2>&1 | FileCheck %s --check-prefix=CHECK2
+// RUN: %env_asan_opts=strict_string_checks=false %run %t test2 2>&1
+// RUN: %env_asan_opts=strict_string_checks=true not %run %t test2 2>&1 | FileCheck %s --check-prefix=CHECK2
 // RUN: %run %t test3 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=false %run %t test3 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=true not %run %t test3 2>&1 | FileCheck %s --check-prefix=CHECK3
+// RUN: %env_asan_opts=strict_string_checks=false %run %t test3 2>&1
+// RUN: %env_asan_opts=strict_string_checks=true not %run %t test3 2>&1 | FileCheck %s --check-prefix=CHECK3
 
 #include <assert.h>
 #include <stdlib.h>
 #include <string.h>
 
 void test1(char *array) {
   // Last symbol is non-digit
   memset(array, '1', 10);

test/asan/TestCases/atol_strict.c

 // Test strict_string_checks option in atol function
 // RUN: %clang_asan %s -o %t
 // RUN: %run %t test1 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=false %run %t test1 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=true not %run %t test1 2>&1 | FileCheck %s --check-prefix=CHECK1
+// RUN: %env_asan_opts=strict_string_checks=false %run %t test1 2>&1
+// RUN: %env_asan_opts=strict_string_checks=true not %run %t test1 2>&1 | FileCheck %s --check-prefix=CHECK1
 // RUN: %run %t test2 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=false %run %t test2 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=true not %run %t test2 2>&1 | FileCheck %s --check-prefix=CHECK2
+// RUN: %env_asan_opts=strict_string_checks=false %run %t test2 2>&1
+// RUN: %env_asan_opts=strict_string_checks=true not %run %t test2 2>&1 | FileCheck %s --check-prefix=CHECK2
 // RUN: %run %t test3 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=false %run %t test3 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=true not %run %t test3 2>&1 | FileCheck %s --check-prefix=CHECK3
+// RUN: %env_asan_opts=strict_string_checks=false %run %t test3 2>&1
+// RUN: %env_asan_opts=strict_string_checks=true not %run %t test3 2>&1 | FileCheck %s --check-prefix=CHECK3
 
 #include <assert.h>
 #include <stdlib.h>
 #include <string.h>
 
 void test1(char *array) {
   // Last symbol is non-digit
   memset(array, '1', 10);

test/asan/TestCases/atoll_strict.c

 // Test strict_string_checks option in atoll function
 // RUN: %clang_asan %s -o %t
 // RUN: %run %t test1 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=false %run %t test1 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=true not %run %t test1 2>&1 | FileCheck %s --check-prefix=CHECK1
+// RUN: %env_asan_opts=strict_string_checks=false %run %t test1 2>&1
+// RUN: %env_asan_opts=strict_string_checks=true not %run %t test1 2>&1 | FileCheck %s --check-prefix=CHECK1
 // RUN: %run %t test2 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=false %run %t test2 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=true not %run %t test2 2>&1 | FileCheck %s --check-prefix=CHECK2
+// RUN: %env_asan_opts=strict_string_checks=false %run %t test2 2>&1
+// RUN: %env_asan_opts=strict_string_checks=true not %run %t test2 2>&1 | FileCheck %s --check-prefix=CHECK2
 // RUN: %run %t test3 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=false %run %t test3 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=true not %run %t test3 2>&1 | FileCheck %s --check-prefix=CHECK3
+// RUN: %env_asan_opts=strict_string_checks=false %run %t test3 2>&1
+// RUN: %env_asan_opts=strict_string_checks=true not %run %t test3 2>&1 | FileCheck %s --check-prefix=CHECK3
 
 #include <assert.h>
 #include <stdlib.h>
 #include <string.h>
 
 void test1(char *array) {
   // Last symbol is non-digit
   memset(array, '1', 10);

test/asan/TestCases/closed-fds.cc

 // Check that when the program closed its std(in|out|err), running the external
 // symbolizer still works.
 
 // RUN: rm -f %t.log.*
-// RUN: %clangxx_asan -O0 %s -o %t 2>&1 && ASAN_OPTIONS=$ASAN_OPTIONS:log_path=%t.log:verbosity=2 not %run %t 2>&1
+// RUN: %clangxx_asan -O0 %s -o %t 2>&1 && %env_asan_opts=log_path=%t.log:verbosity=2 not %run %t 2>&1
 // RUN: FileCheck %s --check-prefix=CHECK-FILE < %t.log.*
 
 // FIXME: copy %t.log back from the device and re-enable on Android.
 // UNSUPPORTED: android
 
 #include <assert.h>
 #include <stdio.h>
 #include <stdlib.h>

test/asan/TestCases/contiguous_container_crash.cc

 // RUN: %clangxx_asan -O %s -o %t
 // RUN: not %run %t crash 2>&1 | FileCheck --check-prefix=CHECK-CRASH %s
 // RUN: not %run %t bad-bounds 2>&1 | FileCheck --check-prefix=CHECK-BAD-BOUNDS %s
 // RUN: not %run %t bad-alignment 2>&1 | FileCheck --check-prefix=CHECK-BAD-ALIGNMENT %s
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:detect_container_overflow=0 %run %t crash
+// RUN: %env_asan_opts=detect_container_overflow=0 %run %t crash
 //
 // Test crash due to __sanitizer_annotate_contiguous_container.
 
 #include <assert.h>
 #include <string.h>
 
 extern "C" {
 void __sanitizer_annotate_contiguous_container(const void *beg, const void *end,

test/asan/TestCases/coverage-and-lsan.cc

 // Make sure coverage is dumped even if there are reported leaks.
 //
 // RUN: %clangxx_asan -fsanitize-coverage=func %s -o %t
 //
 // RUN: rm -rf %T/coverage-and-lsan
 //
 // RUN: mkdir -p %T/coverage-and-lsan/normal
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:coverage=1:coverage_dir=%T/coverage-and-lsan:verbosity=1 not %run %t 2>&1 | FileCheck %s
+// RUN: %env_asan_opts=coverage=1:coverage_dir=%T/coverage-and-lsan:verbosity=1 not %run %t 2>&1 | FileCheck %s
 // RUN: %sancov print %T/coverage-and-lsan/*.sancov 2>&1
 //
 // REQUIRES: leak-detection
 
 int *g = new int;
 int main(int argc, char **argv) {
   g = 0;
   return 0;
 }
 
 // CHECK: LeakSanitizer: detected memory leaks
 // CHECK: CovDump:

test/asan/TestCases/coverage-caller-callee-total-count.cc

 // Test __sanitizer_get_total_unique_coverage for caller-callee coverage
 
 // RUN: %clangxx_asan -fsanitize-coverage=edge,indirect-calls %s -o %t
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:coverage=1 %run %t
+// RUN: %env_asan_opts=coverage=1 %run %t
 // RUN: rm -f caller-callee*.sancov
 //
 // REQUIRES: asan-64-bits
 
 #include <sanitizer/coverage_interface.h>
 #include <stdio.h>
 #include <assert.h>
 int P = 0;

test/asan/TestCases/coverage-caller-callee.cc

 // Test caller-callee coverage with large number of threads
 // and various numbers of callers and callees.
 
 // RUN: %clangxx_asan -fsanitize-coverage=edge,indirect-calls %s -o %t
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:coverage=1:verbosity=1 %run %t 10 1 2>&1 | FileCheck %s --check-prefix=CHECK-10-1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:coverage=1:verbosity=1 %run %t 9  2 2>&1 | FileCheck %s --check-prefix=CHECK-9-2
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:coverage=1:verbosity=1 %run %t 7  3 2>&1 | FileCheck %s --check-prefix=CHECK-7-3
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:coverage=1:verbosity=1 %run %t 17 1 2>&1 | FileCheck %s --check-prefix=CHECK-17-1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:coverage=1:verbosity=1 %run %t 15 2 2>&1 | FileCheck %s --check-prefix=CHECK-15-2
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:coverage=1:verbosity=1 %run %t 18 3 2>&1 | FileCheck %s --check-prefix=CHECK-18-3
+// RUN: %env_asan_opts=coverage=1:verbosity=1 %run %t 10 1 2>&1 | FileCheck %s --check-prefix=CHECK-10-1
+// RUN: %env_asan_opts=coverage=1:verbosity=1 %run %t 9  2 2>&1 | FileCheck %s --check-prefix=CHECK-9-2
+// RUN: %env_asan_opts=coverage=1:verbosity=1 %run %t 7  3 2>&1 | FileCheck %s --check-prefix=CHECK-7-3
+// RUN: %env_asan_opts=coverage=1:verbosity=1 %run %t 17 1 2>&1 | FileCheck %s --check-prefix=CHECK-17-1
+// RUN: %env_asan_opts=coverage=1:verbosity=1 %run %t 15 2 2>&1 | FileCheck %s --check-prefix=CHECK-15-2
+// RUN: %env_asan_opts=coverage=1:verbosity=1 %run %t 18 3 2>&1 | FileCheck %s --check-prefix=CHECK-18-3
 // RUN: rm -f caller-callee*.sancov
 //
 // REQUIRES: asan-64-bits
 //
 // CHECK-10-1: CovDump: 10 caller-callee pairs written
 // CHECK-9-2: CovDump: 18 caller-callee pairs written
 // CHECK-7-3: CovDump: 21 caller-callee pairs written
 // CHECK-17-1: CovDump: 14 caller-callee pairs written

test/asan/TestCases/coverage-disabled.cc

 // Test that no data is collected without a runtime flag.
 //
 // RUN: %clangxx_asan -fsanitize-coverage=func %s -o %t
 //
 // RUN: rm -rf %T/coverage-disabled
 //
 // RUN: mkdir -p %T/coverage-disabled/normal
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:coverage_direct=0:coverage_dir=%T/coverage-disabled/normal:verbosity=1 %run %t
+// RUN: %env_asan_opts=coverage_direct=0:coverage_dir=%T/coverage-disabled/normal:verbosity=1 %run %t
 // RUN: not %sancov print %T/coverage-disabled/normal/*.sancov 2>&1
 //
 // RUN: mkdir -p %T/coverage-disabled/direct
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:coverage_direct=1:coverage_dir=%T/coverage-disabled/direct:verbosity=1 %run %t
+// RUN: %env_asan_opts=coverage_direct=1:coverage_dir=%T/coverage-disabled/direct:verbosity=1 %run %t
 // RUN: cd %T/coverage-disabled/direct
 // RUN: not %sancov rawunpack *.sancov
 //
 // UNSUPPORTED: android
 
 int main(int argc, char **argv) {
   return 0;
 }

test/asan/TestCases/coverage-levels.cc

 // Test various levels of coverage
 //
 // RUN: %clangxx_asan -O1 -fsanitize-coverage=func  %s -o %t
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:coverage=1:coverage_bitset=1:verbosity=1 %run %t 2>&1 | FileCheck %s --check-prefix=CHECK1
+// RUN: %env_asan_opts=coverage=1:coverage_bitset=1:verbosity=1 %run %t 2>&1 | FileCheck %s --check-prefix=CHECK1
 // RUN: %clangxx_asan -O1 -fsanitize-coverage=bb  %s -o %t
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:coverage=1:coverage_bitset=1:verbosity=1 %run %t 2>&1 | FileCheck %s --check-prefix=CHECK2
+// RUN: %env_asan_opts=coverage=1:coverage_bitset=1:verbosity=1 %run %t 2>&1 | FileCheck %s --check-prefix=CHECK2
 // RUN: %clangxx_asan -O1 -fsanitize-coverage=edge  %s -o %t
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:coverage=1:coverage_bitset=1:verbosity=1 %run %t 2>&1 | FileCheck %s --check-prefix=CHECK3
+// RUN: %env_asan_opts=coverage=1:coverage_bitset=1:verbosity=1 %run %t 2>&1 | FileCheck %s --check-prefix=CHECK3
 // RUN: %clangxx_asan -O1 -fsanitize-coverage=edge -mllvm -sanitizer-coverage-block-threshold=0 %s -o %t
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:coverage=1:coverage_bitset=1:verbosity=1 %run %t 2>&1 | FileCheck %s --check-prefix=CHECK3
+// RUN: %env_asan_opts=coverage=1:coverage_bitset=1:verbosity=1 %run %t 2>&1 | FileCheck %s --check-prefix=CHECK3
 // RUN: %clangxx_asan -O1 -fsanitize-coverage=edge,8bit-counters %s -o %t
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:coverage=1:coverage_counters=1:verbosity=1 %run %t 2>&1 | FileCheck %s --check-prefix=CHECK_COUNTERS
+// RUN: %env_asan_opts=coverage=1:coverage_counters=1:verbosity=1 %run %t 2>&1 | FileCheck %s --check-prefix=CHECK_COUNTERS
 
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:coverage=1:coverage_bitset=0:verbosity=1 %run %t 2>&1 | FileCheck %s --check-prefix=CHECK3_NOBITSET
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:coverage=1:verbosity=1 %run %t 2>&1 | FileCheck %s --check-prefix=CHECK3_NOBITSET
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:coverage=1:coverage_pcs=0:verbosity=1 %run %t 2>&1 | FileCheck %s --check-prefix=CHECK3_NOPCS
+// RUN: %env_asan_opts=coverage=1:coverage_bitset=0:verbosity=1 %run %t 2>&1 | FileCheck %s --check-prefix=CHECK3_NOBITSET
+// RUN: %env_asan_opts=coverage=1:verbosity=1 %run %t 2>&1 | FileCheck %s --check-prefix=CHECK3_NOBITSET
+// RUN: %env_asan_opts=coverage=1:coverage_pcs=0:verbosity=1 %run %t 2>&1 | FileCheck %s --check-prefix=CHECK3_NOPCS
 //
 // REQUIRES: asan-64-bits
 
 volatile int sink;
 int main(int argc, char **argv) {
   if (argc == 0)
     sink = 0;
 }

test/asan/TestCases/coverage-maybe-open-file.cc

 // FIXME: https://code.google.com/p/address-sanitizer/issues/detail?id=316
 // XFAIL: android
 //
 // RUN: %clangxx_asan -fsanitize-coverage=func %s -o %t
 // RUN: rm -rf %T/coverage-maybe-open-file
 // RUN: mkdir -p %T/coverage-maybe-open-file && cd %T/coverage-maybe-open-file
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:coverage=1 %run %t | FileCheck %s --check-prefix=CHECK-success
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:coverage=0 %run %t | FileCheck %s --check-prefix=CHECK-fail
+// RUN: %env_asan_opts=coverage=1 %run %t | FileCheck %s --check-prefix=CHECK-success
+// RUN: %env_asan_opts=coverage=0 %run %t | FileCheck %s --check-prefix=CHECK-fail
 // RUN: [ "$(cat test.sancov.packed)" == "test" ]
 // RUN: cd .. && rm -rf %T/coverage-maybe-open-file
 
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 
 #include <sanitizer/coverage_interface.h>

test/asan/TestCases/coverage-order-pcs.cc

 // Test coverage_order_pcs=1 flag which orders the PCs by their appearance.
 // RUN: DIR=%T/coverage-order-pcs
 // RUN: rm -rf $DIR
 // RUN: mkdir $DIR
 // RUN: %clangxx_asan -fsanitize-coverage=func %s -o %t
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:coverage_dir=$DIR:coverage=1:coverage_order_pcs=0 %run %t
+// RUN: %env_asan_opts=coverage_dir=$DIR:coverage=1:coverage_order_pcs=0 %run %t
 // RUN: mv $DIR/*sancov $DIR/A
 
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:coverage_dir=$DIR:coverage=1:coverage_order_pcs=0 %run %t 1
+// RUN: %env_asan_opts=coverage_dir=$DIR:coverage=1:coverage_order_pcs=0 %run %t 1
 // RUN: mv $DIR/*sancov $DIR/B
 
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:coverage_dir=$DIR:coverage=1:coverage_order_pcs=1 %run %t
+// RUN: %env_asan_opts=coverage_dir=$DIR:coverage=1:coverage_order_pcs=1 %run %t
 // RUN: mv $DIR/*sancov $DIR/C
 
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:coverage_dir=$DIR:coverage=1:coverage_order_pcs=1 %run %t 1
+// RUN: %env_asan_opts=coverage_dir=$DIR:coverage=1:coverage_order_pcs=1 %run %t 1
 // RUN: mv $DIR/*sancov $DIR/D
 //
 // RUN: (%sancov print $DIR/A; %sancov print $DIR/B; %sancov print $DIR/C; %sancov print $DIR/D) | FileCheck %s
 //
 // RUN: rm -rf $DIR
 // Ordering works only in 64-bit mode for now.
 // REQUIRES: asan-64-bits
 #include <stdio.h>

test/asan/TestCases/coverage-reset.cc

 // Test __sanitizer_reset_coverage().
 
 // RUN: %clangxx_asan -fsanitize-coverage=func %s -o %t
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:coverage=1 %run %t
+// RUN: %env_asan_opts=coverage=1 %run %t
 
 #include <sanitizer/coverage_interface.h>
 #include <stdio.h>
 #include <assert.h>
 static volatile int sink;
 __attribute__((noinline)) void bar() { sink = 2; }
 __attribute__((noinline)) void foo() { sink = 1; }
 

test/asan/TestCases/coverage-tracing.cc

 // Test -fsanitize-coverage=trace-bb
 //
 // RUN: %clangxx_asan -O1 -fsanitize-coverage=func,trace-bb %s -o %t
 // RUN: rm -rf   %T/coverage-tracing
 // RUN: mkdir %T/coverage-tracing
 // RUN: cd %T/coverage-tracing
-// RUN:  A=x;   ASAN_OPTIONS=$ASAN_OPTIONS:coverage=1:verbosity=1 %run %t $A 1   2>&1 | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK1; mv trace-points.*.sancov $A.points
-// RUN:  A=f;   ASAN_OPTIONS=$ASAN_OPTIONS:coverage=1:verbosity=1 %run %t $A 1   2>&1 | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK2; mv trace-points.*.sancov $A.points
-// RUN:  A=b;   ASAN_OPTIONS=$ASAN_OPTIONS:coverage=1:verbosity=1 %run %t $A 1   2>&1 | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK2; mv trace-points.*.sancov $A.points
-// RUN:  A=bf;  ASAN_OPTIONS=$ASAN_OPTIONS:coverage=1:verbosity=1 %run %t $A 1   2>&1 | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK3; mv trace-points.*.sancov $A.points
-// RUN:  A=fb;  ASAN_OPTIONS=$ASAN_OPTIONS:coverage=1:verbosity=1 %run %t $A 1   2>&1 | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK3; mv trace-points.*.sancov $A.points
-// RUN:  A=ffb; ASAN_OPTIONS=$ASAN_OPTIONS:coverage=1:verbosity=1 %run %t $A 1   2>&1 | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK4; mv trace-points.*.sancov $A.points
-// RUN:  A=fff; ASAN_OPTIONS=$ASAN_OPTIONS:coverage=1:verbosity=1 %run %t $A 1   2>&1 | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK4; mv trace-points.*.sancov $A.points
-// RUN:  A=bbf; ASAN_OPTIONS=$ASAN_OPTIONS:coverage=1:verbosity=1 %run %t $A 100 2>&1 | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK301; mv trace-points.*.sancov $A.points
+// RUN:  A=x;   %env_asan_opts=coverage=1:verbosity=1 %run %t $A 1   2>&1 | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK1; mv trace-points.*.sancov $A.points
+// RUN:  A=f;   %env_asan_opts=coverage=1:verbosity=1 %run %t $A 1   2>&1 | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK2; mv trace-points.*.sancov $A.points
+// RUN:  A=b;   %env_asan_opts=coverage=1:verbosity=1 %run %t $A 1   2>&1 | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK2; mv trace-points.*.sancov $A.points
+// RUN:  A=bf;  %env_asan_opts=coverage=1:verbosity=1 %run %t $A 1   2>&1 | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK3; mv trace-points.*.sancov $A.points
+// RUN:  A=fb;  %env_asan_opts=coverage=1:verbosity=1 %run %t $A 1   2>&1 | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK3; mv trace-points.*.sancov $A.points
+// RUN:  A=ffb; %env_asan_opts=coverage=1:verbosity=1 %run %t $A 1   2>&1 | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK4; mv trace-points.*.sancov $A.points
+// RUN:  A=fff; %env_asan_opts=coverage=1:verbosity=1 %run %t $A 1   2>&1 | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK4; mv trace-points.*.sancov $A.points
+// RUN:  A=bbf; %env_asan_opts=coverage=1:verbosity=1 %run %t $A 100 2>&1 | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK301; mv trace-points.*.sancov $A.points
 // RUN: diff f.points fff.points
 // RUN: diff bf.points fb.points
 // RUN: diff bf.points ffb.points
 // RUN: diff bf.points bbf.points
 // RUN: not diff x.points f.points
 // RUN: not diff x.points b.points
 // RUN: not diff x.points bf.points
 // RUN: not diff f.points b.points

test/asan/TestCases/debug_mapping.cc

 // Checks that the debugging API returns correct shadow scale and offset.
 // RUN: %clangxx_asan -O %s -o %t
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:verbosity=1 %run %t 2>&1 | FileCheck %s
+// RUN: %env_asan_opts=verbosity=1 %run %t 2>&1 | FileCheck %s
 
 #include <sanitizer/asan_interface.h>
 #include <stdio.h>
 #include <stdlib.h>
 
 // printed because of verbosity=1
 // CHECK: SHADOW_SCALE: [[SCALE:[0-9]+]]
 // CHECK: SHADOW_OFFSET: [[OFFSET:0x[0-9a-f]+]]

test/asan/TestCases/debug_ppc64_mapping.cc

 // RUN: %clang_asan -O0 %s -o %t
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:verbosity=0 %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-PPC64-V0
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:verbosity=2 %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-PPC64
+// RUN: %env_asan_opts=verbosity=0 %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-PPC64-V0
+// RUN: %env_asan_opts=verbosity=2 %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-PPC64
 // REQUIRES: powerpc64-supported-target
 
 #include <stdio.h>
 
 int main() {
 // CHECK-PPC64: || `[{{0x0a0|0x040}}000000000, {{0x3ff|0x0ff}}fffffffff]` || HighMem    ||
 // CHECK-PPC64: || `[{{0x034|0x028}}000000000, {{0x09f|0x03f}}fffffffff]` || HighShadow ||
 // CHECK-PPC64: || `[{{0x024|0x024}}000000000, {{0x033|0x027}}fffffffff]` || ShadowGap  ||

test/asan/TestCases/deep_call_stack.cc

 // Check that UAR mode can handle very deep recusrion.
 // RUN: export ASAN_OPTIONS=$ASAN_OPTIONS:detect_stack_use_after_return=1
 // RUN: %clangxx_asan -O2 %s -o %t && \
 // RUN:   (ulimit -s 4096; %run %t) 2>&1 | FileCheck %s
 
 // Also check that use_sigaltstack+verbosity doesn't crash.
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:verbosity=1:use_sigaltstack=1 %run %t  | FileCheck %s
+// RUN: %env_asan_opts=verbosity=1:use_sigaltstack=1 %run %t  | FileCheck %s
 #include <stdio.h>
 
 __attribute__((noinline))
 void RecursiveFunc(int depth, int *ptr) {
   if ((depth % 1000) == 0)
     printf("[%05d] ptr: %p\n", depth, ptr);
   if (depth == 0)
     return;

test/asan/TestCases/deep_stack_uaf.cc

 // Check that we can store lots of stack frames if asked to.
 
 // RUN: %clangxx_asan -O0 %s -o %t 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:malloc_context_size=120:redzone=512 not %run %t 2>&1 | FileCheck %s
+// RUN: %env_asan_opts=malloc_context_size=120:redzone=512 not %run %t 2>&1 | FileCheck %s
 // XFAIL: arm-linux-gnueabi
 // XFAIL: armv7l-unknown-linux-gnueabihf
 #include <stdlib.h>
 #include <stdio.h>
 
 template <int depth>
 struct DeepFree {
   static void free(char *x) {

test/asan/TestCases/double-free.cc

 // RUN: %clangxx_asan -O0 %s -o %t 2>&1
 // RUN: not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK --check-prefix=MALLOC-CTX
 
 // Also works if no malloc context is available.
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:malloc_context_size=0:fast_unwind_on_malloc=0 not %run %t 2>&1 | FileCheck %s
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:malloc_context_size=0:fast_unwind_on_malloc=1 not %run %t 2>&1 | FileCheck %s
+// RUN: %env_asan_opts=malloc_context_size=0:fast_unwind_on_malloc=0 not %run %t 2>&1 | FileCheck %s
+// RUN: %env_asan_opts=malloc_context_size=0:fast_unwind_on_malloc=1 not %run %t 2>&1 | FileCheck %s
 // XFAIL: arm-linux-gnueabi
 // XFAIL: armv7l-unknown-linux-gnueabihf
 
 #include <stdlib.h>
 #include <string.h>
 int main(int argc, char **argv) {
   char *x = (char*)malloc(10 * sizeof(char));
   memset(x, 0, 10);

test/asan/TestCases/dump_instruction_bytes.cc

 // Check that ASan prints the faulting instruction bytes on
 // dump_instruction_bytes=1
 // RUN: %clangxx_asan  %s -o %t
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:dump_instruction_bytes=1 not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-DUMP
+// RUN: %env_asan_opts=dump_instruction_bytes=1 not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-DUMP
 // RUN: not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-NODUMP
 //
 // REQUIRES: x86_64-supported-target,i386-supported-target
 
 int main() {
 #if defined(__x86_64__)
   asm("movq $0, %rax");
   asm("movl $0xcafebabe, 0x0(%rax)");
 #elif defined(i386)
   asm("movl $0, %eax");
   asm("movl $0xcafebabe, 0x0(%eax)");
 #endif
   // CHECK-DUMP: First 16 instruction bytes at pc: c7 00 be ba fe ca
   // CHECK-NODUMP-NOT: First 16 instruction bytes
   return 0;
 }

test/asan/TestCases/gc-test.cc

 // RUN: %clangxx_asan %s -pthread -o %t
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:detect_stack_use_after_return=1 %run %t 2>&1 | FileCheck %s --check-prefix=CHECK1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:detect_stack_use_after_return=0 %run %t 2>&1 | FileCheck %s --check-prefix=CHECK0
+// RUN: %env_asan_opts=detect_stack_use_after_return=1 %run %t 2>&1 | FileCheck %s --check-prefix=CHECK1
+// RUN: %env_asan_opts=detect_stack_use_after_return=0 %run %t 2>&1 | FileCheck %s --check-prefix=CHECK0
 // RUN: %clangxx_asan -O3 %s -pthread -o %t
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:detect_stack_use_after_return=1 %run %t 2>&1 | FileCheck %s --check-prefix=CHECK1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:detect_stack_use_after_return=0 %run %t 2>&1 | FileCheck %s --check-prefix=CHECK0
+// RUN: %env_asan_opts=detect_stack_use_after_return=1 %run %t 2>&1 | FileCheck %s --check-prefix=CHECK1
+// RUN: %env_asan_opts=detect_stack_use_after_return=0 %run %t 2>&1 | FileCheck %s --check-prefix=CHECK0
 // REQUIRES: stable-runtime
 
 #include <assert.h>
 #include <stdio.h>
 #include <pthread.h>
 #include <sanitizer/asan_interface.h>
 
 static const int kNumThreads = 2;

test/asan/TestCases/heap-overflow.cc

 // RUN: %clangxx_asan -O0 %s -o %t && not %run %t 2>&1 | FileCheck %s
 // RUN: %clangxx_asan -O1 %s -o %t && not %run %t 2>&1 | FileCheck %s
 // RUN: %clangxx_asan -O2 %s -o %t && not %run %t 2>&1 | FileCheck %s
 // RUN: %clangxx_asan -O3 %s -o %t && not %run %t 2>&1 | FileCheck %s
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:print_stats=1 not %run %t 2>&1 | FileCheck %s
+// RUN: %env_asan_opts=print_stats=1 not %run %t 2>&1 | FileCheck %s
 
 // FIXME: Fix this test under GCC.
 // REQUIRES: Clang
 
 #include <stdlib.h>
 #include <string.h>
 int main(int argc, char **argv) {
   char *x = (char*)malloc(10 * sizeof(char));

test/asan/TestCases/init-order-atexit.cc

 // Test for the following situation:
 // (1) global A is constructed.
 // (2) exit() is called during construction of global B.
 // (3) destructor of A reads uninitialized global C from another module.
 // We do *not* want to report init-order bug in this case.
 
 // RUN: %clangxx_asan -O0 %s %p/Helpers/init-order-atexit-extra.cc -o %t
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_init_order=true not %run %t 2>&1 | FileCheck %s
+// RUN: %env_asan_opts=strict_init_order=true not %run %t 2>&1 | FileCheck %s
 
 #include <stdio.h>
 #include <stdlib.h>
 
 void AccessC();
 
 class A {
  public:

test/asan/TestCases/init-order-pthread-create.cc

 // Check that init-order checking is properly disabled if pthread_create is
 // called.
 
 // RUN: %clangxx_asan %s %p/Helpers/init-order-pthread-create-extra.cc -pthread -o %t
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_init_order=true %run %t
+// RUN: %env_asan_opts=strict_init_order=true %run %t
 
 #include <stdio.h>
 #include <pthread.h>
 #include <unistd.h>
 
 void *bar(void *input, bool sleep_before_init) {
   if (sleep_before_init)
     usleep(500000);

test/asan/TestCases/initialization-blacklist.cc

 // Test for blacklist functionality of initialization-order checker.
 
 // RUN: %clangxx_asan -O0 %s %p/Helpers/initialization-blacklist-extra.cc\
 // RUN:   %p/Helpers/initialization-blacklist-extra2.cc \
 // RUN:   -fsanitize-blacklist=%p/Helpers/initialization-blacklist.txt -o %t
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:check_initialization_order=true %run %t 2>&1
+// RUN: %env_asan_opts=check_initialization_order=true %run %t 2>&1
 // RUN: %clangxx_asan -O1 %s %p/Helpers/initialization-blacklist-extra.cc\
 // RUN:   %p/Helpers/initialization-blacklist-extra2.cc \
 // RUN:   -fsanitize-blacklist=%p/Helpers/initialization-blacklist.txt -o %t
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:check_initialization_order=true %run %t 2>&1
+// RUN: %env_asan_opts=check_initialization_order=true %run %t 2>&1
 // RUN: %clangxx_asan -O2 %s %p/Helpers/initialization-blacklist-extra.cc\
 // RUN:   %p/Helpers/initialization-blacklist-extra2.cc \
 // RUN:   -fsanitize-blacklist=%p/Helpers/initialization-blacklist.txt -o %t
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:check_initialization_order=true %run %t 2>&1
+// RUN: %env_asan_opts=check_initialization_order=true %run %t 2>&1
 
 // Function is defined in another TU.
 int readBadGlobal();
 int x = readBadGlobal();  // init-order bug.
 
 // Function is defined in another TU.
 int accessBadObject();
 int y = accessBadObject();  // init-order bug.
 
 int readBadSrcGlobal();
 int z = readBadSrcGlobal();  // init-order bug.
 
 int main(int argc, char **argv) {
   return argc + x + y + z - 1;
 }

test/asan/TestCases/initialization-bug.cc

 // Test to make sure basic initialization order errors are caught.
 
 // RUN: %clangxx_asan -O0 %s %p/Helpers/initialization-bug-extra2.cc -o %t-INIT-ORDER-EXE
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:check_initialization_order=true not %run %t-INIT-ORDER-EXE 2>&1 | FileCheck %s
+// RUN: %env_asan_opts=check_initialization_order=true not %run %t-INIT-ORDER-EXE 2>&1 | FileCheck %s
 
 // Do not test with optimization -- the error may be optimized away.
 
 // FIXME: https://code.google.com/p/address-sanitizer/issues/detail?id=186
 // XFAIL: darwin
 
 #include <cstdio>
 

test/asan/TestCases/initialization-constexpr.cc

 // Constexpr:
 // We need to check that a global variable initialized with a constexpr
 // constructor can be accessed during dynamic initialization (as a constexpr
 // constructor implies that it was initialized during constant initialization,
 // not dynamic initialization).
 
 // RUN: %clangxx_asan -O0 %s %p/Helpers/initialization-constexpr-extra.cc --std=c++11 -o %t
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:check_initialization_order=true %run %t 2>&1
+// RUN: %env_asan_opts=check_initialization_order=true %run %t 2>&1
 // RUN: %clangxx_asan -O1 %s %p/Helpers/initialization-constexpr-extra.cc --std=c++11 -o %t
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:check_initialization_order=true %run %t 2>&1
+// RUN: %env_asan_opts=check_initialization_order=true %run %t 2>&1
 // RUN: %clangxx_asan -O2 %s %p/Helpers/initialization-constexpr-extra.cc --std=c++11 -o %t
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:check_initialization_order=true %run %t 2>&1
+// RUN: %env_asan_opts=check_initialization_order=true %run %t 2>&1
 // RUN: %clangxx_asan -O3 %s %p/Helpers/initialization-constexpr-extra.cc --std=c++11 -o %t
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:check_initialization_order=true %run %t 2>&1
+// RUN: %env_asan_opts=check_initialization_order=true %run %t 2>&1
 
 class Integer {
   private:
   int value;
 
   public:
   constexpr Integer(int x = 0) : value(x) {}
   int getValue() {return value;}
 };
 Integer coolestInteger(42);
 int getCoolestInteger() { return coolestInteger.getValue(); }
 
 int main() { return 0; }

test/asan/TestCases/initialization-nobug.cc

 // A collection of various initializers which shouldn't trip up initialization
 // order checking.  If successful, this will just return 0.
 
 // RUN: %clangxx_asan -O0 %s %p/Helpers/initialization-nobug-extra.cc -o %t
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:check_initialization_order=true %run %t 2>&1
+// RUN: %env_asan_opts=check_initialization_order=true %run %t 2>&1
 // RUN: %clangxx_asan -O1 %s %p/Helpers/initialization-nobug-extra.cc -o %t
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:check_initialization_order=true %run %t 2>&1
+// RUN: %env_asan_opts=check_initialization_order=true %run %t 2>&1
 // RUN: %clangxx_asan -O2 %s %p/Helpers/initialization-nobug-extra.cc -o %t
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:check_initialization_order=true %run %t 2>&1
+// RUN: %env_asan_opts=check_initialization_order=true %run %t 2>&1
 // RUN: %clangxx_asan -O3 %s %p/Helpers/initialization-nobug-extra.cc -o %t
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:check_initialization_order=true %run %t 2>&1
+// RUN: %env_asan_opts=check_initialization_order=true %run %t 2>&1
 
 // Simple access:
 // Make sure that accessing a global in the same TU is safe
 
 bool condition = true;
 int initializeSameTU() {
   return condition ? 0x2a : 052;
 }

test/asan/TestCases/invalid-free.cc

 // RUN: %clangxx_asan -O0 %s -o %t
 // RUN: not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK --check-prefix=MALLOC-CTX
 
 // Also works if no malloc context is available.
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:malloc_context_size=0:fast_unwind_on_malloc=0 not %run %t 2>&1 | FileCheck %s
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:malloc_context_size=0:fast_unwind_on_malloc=1 not %run %t 2>&1 | FileCheck %s
+// RUN: %env_asan_opts=malloc_context_size=0:fast_unwind_on_malloc=0 not %run %t 2>&1 | FileCheck %s
+// RUN: %env_asan_opts=malloc_context_size=0:fast_unwind_on_malloc=1 not %run %t 2>&1 | FileCheck %s
 // XFAIL: arm-linux-gnueabi
 // XFAIL: armv7l-unknown-linux-gnueabihf
 
 #include <stdlib.h>
 #include <string.h>
 int main(int argc, char **argv) {
   char *x = (char*)malloc(10 * sizeof(char));
   memset(x, 0, 10);

test/asan/TestCases/log-path_test.cc

 // FIXME: https://code.google.com/p/address-sanitizer/issues/detail?id=316
 // XFAIL: android
 //
 // RUN: %clangxx_asan  %s -o %t
 
 // Regular run.
 // RUN: not %run %t 2> %t.out
 // RUN: FileCheck %s --check-prefix=CHECK-ERROR < %t.out
 
 // Good log_path.
 // RUN: rm -f %t.log.*
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:log_path=%t.log not %run %t 2> %t.out
+// RUN: %env_asan_opts=log_path=%t.log not %run %t 2> %t.out
 // RUN: FileCheck %s --check-prefix=CHECK-ERROR < %t.log.*
 
 // Invalid log_path.
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:log_path=/dev/null/INVALID not %run %t 2> %t.out
+// RUN: %env_asan_opts=log_path=/dev/null/INVALID not %run %t 2> %t.out
 // RUN: FileCheck %s --check-prefix=CHECK-INVALID < %t.out
 
 // Too long log_path.
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:log_path=`for((i=0;i<10000;i++)); do echo -n $i; done` \
+// RUN: %env_asan_opts=log_path=`for((i=0;i<10000;i++)); do echo -n $i; done` \
 // RUN:   not %run %t 2> %t.out
 // RUN: FileCheck %s --check-prefix=CHECK-LONG < %t.out
 
 // Run w/o errors should not produce any log.
 // RUN: rm -f %t.log.*
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:log_path=%t.log  %run %t ARG ARG ARG
+// RUN: %env_asan_opts=log_path=%t.log  %run %t ARG ARG ARG
 // RUN: not cat %t.log.*
 
 // FIXME: log_path is not supported on Windows yet.
 // XFAIL: win32
 
 #include <stdlib.h>
 #include <string.h>
 int main(int argc, char **argv) {

test/asan/TestCases/malloc_context_size.cc

 // RUN: %clangxx_asan -O0 %s -o %t
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:malloc_context_size=0:fast_unwind_on_malloc=0 not %run %t 2>&1 | FileCheck %s
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:malloc_context_size=0:fast_unwind_on_malloc=1 not %run %t 2>&1 | FileCheck %s
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:malloc_context_size=1:fast_unwind_on_malloc=0 not %run %t 2>&1 | FileCheck %s
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:malloc_context_size=1:fast_unwind_on_malloc=1 not %run %t 2>&1 | FileCheck %s
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:malloc_context_size=2 not %run %t 2>&1 | FileCheck %s --check-prefix=TWO
+// RUN: %env_asan_opts=malloc_context_size=0:fast_unwind_on_malloc=0 not %run %t 2>&1 | FileCheck %s
+// RUN: %env_asan_opts=malloc_context_size=0:fast_unwind_on_malloc=1 not %run %t 2>&1 | FileCheck %s
+// RUN: %env_asan_opts=malloc_context_size=1:fast_unwind_on_malloc=0 not %run %t 2>&1 | FileCheck %s
+// RUN: %env_asan_opts=malloc_context_size=1:fast_unwind_on_malloc=1 not %run %t 2>&1 | FileCheck %s
+// RUN: %env_asan_opts=malloc_context_size=2 not %run %t 2>&1 | FileCheck %s --check-prefix=TWO
 
 int main() {
   char *x = new char[20];
   delete[] x;
   return x[0];
 
   // CHECK: freed by thread T{{.*}} here:
   // CHECK-NEXT: #0 0x{{.*}} in {{operator delete( )?\[\]|wrap__ZdaPv}}

test/asan/TestCases/malloc_fill.cc

 // Check that we fill malloc-ed memory correctly.
 // RUN: %clangxx_asan %s -o %t
 // RUN: %run %t | FileCheck %s
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:max_malloc_fill_size=10:malloc_fill_byte=8 %run %t | FileCheck %s --check-prefix=CHECK-10-8
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:max_malloc_fill_size=20:malloc_fill_byte=171 %run %t | FileCheck %s --check-prefix=CHECK-20-ab
+// RUN: %env_asan_opts=max_malloc_fill_size=10:malloc_fill_byte=8 %run %t | FileCheck %s --check-prefix=CHECK-10-8
+// RUN: %env_asan_opts=max_malloc_fill_size=20:malloc_fill_byte=171 %run %t | FileCheck %s --check-prefix=CHECK-20-ab
 
 #include <stdio.h>
 int main(int argc, char **argv) {
   // With asan allocator this makes sure we get memory from mmap.
   static const int kSize = 1 << 25;
   unsigned char *x = new unsigned char[kSize];
   printf("-");
   for (int i = 0; i <= 32; i++) {

test/asan/TestCases/max_redzone.cc

 // Test max_redzone runtime option.
 
-// RUN: %clangxx_asan -O0 %s -o %t && env ASAN_OPTIONS=$ASAN_OPTIONS:max_redzone=16 %run %t 0 2>&1
+// RUN: %clangxx_asan -O0 %s -o %t && %env_asan_opts=max_redzone=16 %run %t 0 2>&1
 // RUN: %clangxx_asan -O0 %s -o %t && %run %t 1 2>&1
-// RUN: %clangxx_asan -O3 %s -o %t && env ASAN_OPTIONS=$ASAN_OPTIONS:max_redzone=16 %run %t 0 2>&1
+// RUN: %clangxx_asan -O3 %s -o %t && %env_asan_opts=max_redzone=16 %run %t 0 2>&1
 // RUN: %clangxx_asan -O3 %s -o %t && %run %t 1 2>&1
 
 #include <stdio.h>
 #include <stdlib.h>
 #include <stdint.h>
 #include <sanitizer/allocator_interface.h>
 
 int main(int argc, char **argv) {

test/asan/TestCases/memcmp_strict_test.cc

-// RUN: %clangxx_asan -O0 %s -o %t && env ASAN_OPTIONS=$ASAN_OPTIONS:strict_memcmp=0 %run %t
-// RUN: %clangxx_asan -O0 %s -o %t && env ASAN_OPTIONS=$ASAN_OPTIONS:strict_memcmp=1 not %run %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -O0 %s -o %t && %env_asan_opts=strict_memcmp=0 %run %t
+// RUN: %clangxx_asan -O0 %s -o %t && %env_asan_opts=strict_memcmp=1 not %run %t 2>&1 | FileCheck %s
 // Default to strict_memcmp=1.
 // RUN: %clangxx_asan -O0 %s -o %t && not %run %t 2>&1 | FileCheck %s
 
 #include <stdio.h>
 #include <string.h>
 int main() {
   char kFoo[] = "foo";
   char kFubar[] = "fubar";
   int res = memcmp(kFoo, kFubar, strlen(kFubar));
   printf("res: %d\n", res);
   // CHECK: AddressSanitizer: stack-buffer-overflow
   return 0;
 }

test/asan/TestCases/mmap_limit_mb.cc

 // Test the mmap_limit_mb flag.
 //
 // RUN: %clangxx_asan -O2 %s -o %t
 // RUN: %run %t 20 16
 // RUN: %run %t 30 1000000
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:mmap_limit_mb=300 %run %t 20 16
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:mmap_limit_mb=300 %run %t 20 1000000
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:mmap_limit_mb=300 not %run %t 500 16 2>&1 | FileCheck %s
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:mmap_limit_mb=300 not %run %t 500 1000000 2>&1 | FileCheck %s
+// RUN: %env_asan_opts=mmap_limit_mb=300 %run %t 20 16
+// RUN: %env_asan_opts=mmap_limit_mb=300 %run %t 20 1000000
+// RUN: %env_asan_opts=mmap_limit_mb=300 not %run %t 500 16 2>&1 | FileCheck %s
+// RUN: %env_asan_opts=mmap_limit_mb=300 not %run %t 500 1000000 2>&1 | FileCheck %s
 // XFAIL: arm-linux-gnueabi
 
 #include <assert.h>
 #include <stdlib.h>
 #include <stdio.h>
 
 #include <algorithm>
 #include <vector>

test/asan/TestCases/poison_partial.cc

 // RUN: %clangxx_asan -O0 %s -o %t
 // RUN: not %run %t      2>&1 | FileCheck %s
 // RUN: not %run %t heap 2>&1 | FileCheck %s
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:poison_partial=0 %run %t
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:poison_partial=0 %run %t heap
+// RUN: %env_asan_opts=poison_partial=0 %run %t
+// RUN: %env_asan_opts=poison_partial=0 %run %t heap
 #include <string.h>
 char g[21];
 char *x;
 
 int main(int argc, char **argv) {
   if (argc >= 2)
     x = new char[21];
   else
     x = &g[0];
   memset(x, 0, 21);
   int *y = (int*)x;
   return y[5];
 }
 // CHECK: 0 bytes to the right

test/asan/TestCases/print_summary.cc

 // RUN: %clangxx_asan -O0 %s -o %t
 // RUN: not %run %t 2>&1 | FileCheck %s --check-prefix=SOURCE
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:symbolize=false not %run %t 2>&1 | FileCheck %s --check-prefix=MODULE
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:print_summary=false not %run %t 2>&1 | FileCheck %s --check-prefix=MISSING
+// RUN: %env_asan_opts=symbolize=false not %run %t 2>&1 | FileCheck %s --check-prefix=MODULE
+// RUN: %env_asan_opts=print_summary=false not %run %t 2>&1 | FileCheck %s --check-prefix=MISSING
 
 int main() {
   char *x = new char[20];
   delete[] x;
   return x[0];
   // SOURCE: ERROR: AddressSanitizer: heap-use-after-free
   // SOURCE: SUMMARY: AddressSanitizer: heap-use-after-free {{.*}}print_summary.cc:[[@LINE-2]]{{.*}} main
   // MODULE: ERROR: AddressSanitizer: heap-use-after-free
   // MODULE: SUMMARY: AddressSanitizer: heap-use-after-free ({{.*}}+0x{{.*}})
   // MISSING: ERROR: AddressSanitizer: heap-use-after-free
   // MISSING-NOT: SUMMARY
 }

test/asan/TestCases/printf-1.c

 // RUN: %clang_asan -O2 %s -o %t
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:check_printf=1 %run %t 2>&1 | FileCheck %s
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:check_printf=0 %run %t 2>&1 | FileCheck %s
+// RUN: %env_asan_opts=check_printf=1 %run %t 2>&1 | FileCheck %s
+// RUN: %env_asan_opts=check_printf=0 %run %t 2>&1 | FileCheck %s
 // RUN: %run %t 2>&1 | FileCheck %s
 
 #include <stdio.h>
 #if defined(_WIN32)
 # define snprintf _snprintf
 #endif
 
 int main() {

test/asan/TestCases/printf-2.c

 // RUN: %clang_asan -O2 %s -o %t
 // We need replace_str=0 and replace_intrin=0 to avoid reporting errors in
 // strlen() and memcpy() called by printf().
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:replace_str=0:replace_intrin=0:check_printf=1 not %run %t 2>&1 | FileCheck --check-prefix=CHECK-ON %s
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:replace_str=0:replace_intrin=0:check_printf=0 %run %t 2>&1 | FileCheck --check-prefix=CHECK-OFF %s
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:replace_str=0:replace_intrin=0 not %run %t 2>&1 | FileCheck --check-prefix=CHECK-ON %s
+// RUN: %env_asan_opts=replace_str=0:replace_intrin=0:check_printf=1 not %run %t 2>&1 | FileCheck --check-prefix=CHECK-ON %s
+// RUN: %env_asan_opts=replace_str=0:replace_intrin=0:check_printf=0 %run %t 2>&1 | FileCheck --check-prefix=CHECK-OFF %s
+// RUN: %env_asan_opts=replace_str=0:replace_intrin=0 not %run %t 2>&1 | FileCheck --check-prefix=CHECK-ON %s
 
 // FIXME: printf is not intercepted on Windows yet.
 // XFAIL: win32
 
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 int main() {

test/asan/TestCases/printf-3.c

 // RUN: %clang_asan -O2 %s -o %t
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:check_printf=1 not %run %t 2>&1 | FileCheck --check-prefix=CHECK-ON %s
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:check_printf=0 %run %t 2>&1 | FileCheck --check-prefix=CHECK-OFF %s
+// RUN: %env_asan_opts=check_printf=1 not %run %t 2>&1 | FileCheck --check-prefix=CHECK-ON %s
+// RUN: %env_asan_opts=check_printf=0 %run %t 2>&1 | FileCheck --check-prefix=CHECK-OFF %s
 // RUN: not %run %t 2>&1 | FileCheck --check-prefix=CHECK-ON %s
 
 // FIXME: printf is not intercepted on Windows yet.
 // XFAIL: win32
 
 #include <stdio.h>
 int main() {
   volatile char c = '0';

test/asan/TestCases/printf-4.c

 // RUN: %clang_asan -O2 %s -o %t
 // We need replace_str=0 and replace_intrin=0 to avoid reporting errors in
 // strlen() and memcpy() called by puts().
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:replace_str=0:replace_intrin=0:check_printf=1 not %run %t 2>&1 | FileCheck --check-prefix=CHECK-ON %s
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:replace_str=0:replace_intrin=0 not %run %t 2>&1 | FileCheck --check-prefix=CHECK-ON %s
+// RUN: %env_asan_opts=replace_str=0:replace_intrin=0:check_printf=1 not %run %t 2>&1 | FileCheck --check-prefix=CHECK-ON %s
+// RUN: %env_asan_opts=replace_str=0:replace_intrin=0 not %run %t 2>&1 | FileCheck --check-prefix=CHECK-ON %s
 
 // FIXME: printf is not intercepted on Windows yet.
 // XFAIL: win32
 
 #include <stdio.h>
 int main() {
   volatile char c = '0';
   volatile int x = 12;

test/asan/TestCases/printf-5.c

 // RUN: %clang_asan -O2 %s -o %t
 // We need replace_intrin=0 to avoid reporting errors in memcpy.
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:replace_intrin=0:check_printf=1 not %run %t 2>&1 | FileCheck --check-prefix=CHECK-ON %s
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:replace_intrin=0:check_printf=0 %run %t 2>&1 | FileCheck --check-prefix=CHECK-OFF %s
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:replace_intrin=0 not %run %t 2>&1 | FileCheck --check-prefix=CHECK-ON %s
+// RUN: %env_asan_opts=replace_intrin=0:check_printf=1 not %run %t 2>&1 | FileCheck --check-prefix=CHECK-ON %s
+// RUN: %env_asan_opts=replace_intrin=0:check_printf=0 %run %t 2>&1 | FileCheck --check-prefix=CHECK-OFF %s
+// RUN: %env_asan_opts=replace_intrin=0 not %run %t 2>&1 | FileCheck --check-prefix=CHECK-ON %s
 
 // FIXME: printf is not intercepted on Windows yet.
 // XFAIL: win32
 
 #include <stdio.h>
 #include <string.h>
 int main() {
   volatile char c = '0';

test/asan/TestCases/stack-overflow.cc

 // Test ASan detection of stack-overflow condition.
 
-// RUN: %clangxx_asan -O0 %s -DSMALL_FRAME -pthread -o %t && env ASAN_OPTIONS=$ASAN_OPTIONS:use_sigaltstack=1 not %run %t 2>&1 | FileCheck %s
-// RUN: %clangxx_asan -O3 %s -DSMALL_FRAME -pthread -o %t && env ASAN_OPTIONS=$ASAN_OPTIONS:use_sigaltstack=1 not %run %t 2>&1 | FileCheck %s
-// RUN: %clangxx_asan -O0 %s -DSAVE_ALL_THE_REGISTERS -pthread -o %t && env ASAN_OPTIONS=$ASAN_OPTIONS:use_sigaltstack=1 not %run %t 2>&1 | FileCheck %s
-// RUN: %clangxx_asan -O3 %s -DSAVE_ALL_THE_REGISTERS -pthread -o %t && env ASAN_OPTIONS=$ASAN_OPTIONS:use_sigaltstack=1 not %run %t 2>&1 | FileCheck %s
-// RUN: %clangxx_asan -O0 %s -pthread -o %t && env ASAN_OPTIONS=$ASAN_OPTIONS:use_sigaltstack=1 not %run %t 2>&1 | FileCheck %s
-// RUN: %clangxx_asan -O3 %s -pthread -o %t && env ASAN_OPTIONS=$ASAN_OPTIONS:use_sigaltstack=1 not %run %t 2>&1 | FileCheck %s
-
-// RUN: %clangxx_asan -O0 %s -DTHREAD -DSMALL_FRAME -pthread -o %t && env ASAN_OPTIONS=$ASAN_OPTIONS:use_sigaltstack=1 not %run %t 2>&1 | FileCheck %s
-// RUN: %clangxx_asan -O3 %s -DTHREAD -DSMALL_FRAME -pthread -o %t && env ASAN_OPTIONS=$ASAN_OPTIONS:use_sigaltstack=1 not %run %t 2>&1 | FileCheck %s
-// RUN: %clangxx_asan -O0 %s -DTHREAD -DSAVE_ALL_THE_REGISTERS -pthread -o %t && env ASAN_OPTIONS=$ASAN_OPTIONS:use_sigaltstack=1 not %run %t 2>&1 | FileCheck %s
-// RUN: %clangxx_asan -O3 %s -DTHREAD -DSAVE_ALL_THE_REGISTERS -pthread -o %t && env ASAN_OPTIONS=$ASAN_OPTIONS:use_sigaltstack=1 not %run %t 2>&1 | FileCheck %s
-// RUN: %clangxx_asan -O0 %s -DTHREAD -pthread -o %t && env ASAN_OPTIONS=$ASAN_OPTIONS:use_sigaltstack=1 not %run %t 2>&1 | FileCheck %s
-// RUN: %clangxx_asan -O3 %s -DTHREAD -pthread -o %t && env ASAN_OPTIONS=$ASAN_OPTIONS:use_sigaltstack=1 not %run %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -O0 %s -DSMALL_FRAME -pthread -o %t && %env_asan_opts=use_sigaltstack=1 not %run %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -O3 %s -DSMALL_FRAME -pthread -o %t && %env_asan_opts=use_sigaltstack=1 not %run %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -O0 %s -DSAVE_ALL_THE_REGISTERS -pthread -o %t && %env_asan_opts=use_sigaltstack=1 not %run %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -O3 %s -DSAVE_ALL_THE_REGISTERS -pthread -o %t && %env_asan_opts=use_sigaltstack=1 not %run %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -O0 %s -pthread -o %t && %env_asan_opts=use_sigaltstack=1 not %run %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -O3 %s -pthread -o %t && %env_asan_opts=use_sigaltstack=1 not %run %t 2>&1 | FileCheck %s
+
+// RUN: %clangxx_asan -O0 %s -DTHREAD -DSMALL_FRAME -pthread -o %t && %env_asan_opts=use_sigaltstack=1 not %run %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -O3 %s -DTHREAD -DSMALL_FRAME -pthread -o %t && %env_asan_opts=use_sigaltstack=1 not %run %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -O0 %s -DTHREAD -DSAVE_ALL_THE_REGISTERS -pthread -o %t && %env_asan_opts=use_sigaltstack=1 not %run %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -O3 %s -DTHREAD -DSAVE_ALL_THE_REGISTERS -pthread -o %t && %env_asan_opts=use_sigaltstack=1 not %run %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -O0 %s -DTHREAD -pthread -o %t && %env_asan_opts=use_sigaltstack=1 not %run %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -O3 %s -DTHREAD -pthread -o %t && %env_asan_opts=use_sigaltstack=1 not %run %t 2>&1 | FileCheck %s
 // RUN: not %run %t 2>&1 | FileCheck %s
 // REQUIRES: stable-runtime
 
 #include <assert.h>
 #include <stdlib.h>
 #include <pthread.h>
 #include <unistd.h>
 #include <sys/time.h>

test/asan/TestCases/stack-use-after-return.cc

 // RUN: export ASAN_OPTIONS=$ASAN_OPTIONS:detect_stack_use_after_return=1
 // RUN: %clangxx_asan  -O0 %s -pthread -o %t && not %run %t 2>&1 | FileCheck %s
 // RUN: %clangxx_asan  -O1 %s -pthread -o %t && not %run %t 2>&1 | FileCheck %s
 // RUN: %clangxx_asan  -O2 %s -pthread -o %t && not %run %t 2>&1 | FileCheck %s
 // RUN: %clangxx_asan  -O3 %s -pthread -o %t && not %run %t 2>&1 | FileCheck %s
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:detect_stack_use_after_return=0 %run %t
+// RUN: %env_asan_opts=detect_stack_use_after_return=0 %run %t
 // Regression test for a CHECK failure with small stack size and large frame.
 // RUN: %clangxx_asan  -O3 %s -pthread -o %t -DkSize=10000 -DUseThread -DkStackSize=65536 && not %run %t 2>&1 | FileCheck --check-prefix=THREAD %s
 //
 // Test that we can find UAR in a thread other than main:
 // RUN: %clangxx_asan  -DUseThread -O2 %s -pthread -o %t && not %run %t 2>&1 | FileCheck --check-prefix=THREAD %s
 //
 // Test the max_uar_stack_size_log/min_uar_stack_size_log flag.
 //
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:max_uar_stack_size_log=20:verbosity=1 not %run %t 2>&1 | FileCheck --check-prefix=CHECK-20 %s
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:min_uar_stack_size_log=24:max_uar_stack_size_log=24:verbosity=1 not %run %t 2>&1 | FileCheck --check-prefix=CHECK-24 %s
+// RUN: %env_asan_opts=detect_stack_use_after_return=1:max_uar_stack_size_log=20:verbosity=1 not %run %t 2>&1 | FileCheck --check-prefix=CHECK-20 %s
+// RUN: %env_asan_opts=detect_stack_use_after_return=1:min_uar_stack_size_log=24:max_uar_stack_size_log=24:verbosity=1 not %run %t 2>&1 | FileCheck --check-prefix=CHECK-24 %s
 
 #include <stdio.h>
 #include <pthread.h>
 
 #ifndef kSize
 # define kSize 1
 #endif
 

test/asan/TestCases/strcasestr-1.c

 // Test haystack overflow in strcasestr function
-// RUN: %clang_asan %s -o %t && ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=true not %run %t 2>&1 | FileCheck %s
+// RUN: %clang_asan %s -o %t && %env_asan_opts=strict_string_checks=true not %run %t 2>&1 | FileCheck %s
 
 // Test intercept_strstr asan option
 // Disable other interceptors because strlen may be called inside strcasestr
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:intercept_strstr=false:replace_str=false %run %t 2>&1
+// RUN: %env_asan_opts=intercept_strstr=false:replace_str=false %run %t 2>&1
 
 // There's no interceptor for strcasestr on Windows
 // XFAIL: win32
 
 #define _GNU_SOURCE
 #include <assert.h>
 #include <string.h>
 

test/asan/TestCases/strcasestr-2.c

 // Test needle overflow in strcasestr function
-// RUN: %clang_asan %s -o %t && ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=true not %run %t 2>&1 | FileCheck %s
+// RUN: %clang_asan %s -o %t && %env_asan_opts=strict_string_checks=true not %run %t 2>&1 | FileCheck %s
 
 // Test intercept_strstr asan option
 // Disable other interceptors because strlen may be called inside strcasestr
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:intercept_strstr=false:replace_str=false %run %t 2>&1
+// RUN: %env_asan_opts=intercept_strstr=false:replace_str=false %run %t 2>&1
 
 // There's no interceptor for strcasestr on Windows
 // XFAIL: win32
 
 #define _GNU_SOURCE
 #include <assert.h>
 #include <string.h>
 

test/asan/TestCases/strcasestr_strict.c

 // Test strict_string_checks option in strcasestr function
 // RUN: %clang_asan %s -o %t && %run %t 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=false %run %t 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=true not %run %t 2>&1 | FileCheck %s
+// RUN: %env_asan_opts=strict_string_checks=false %run %t 2>&1
+// RUN: %env_asan_opts=strict_string_checks=true not %run %t 2>&1 | FileCheck %s
 
 // There's no interceptor for strcasestr on Windows
 // XFAIL: win32
 
 #define _GNU_SOURCE
 #include <assert.h>
 #include <stdlib.h>
 #include <string.h>

test/asan/TestCases/strcat_strict.c

 // Test strict_string_checks option in strcat function
 // RUN: %clang_asan %s -o %t
 // RUN: not %run %t test1 2>&1 | FileCheck %s --check-prefix=CHECK1-NONSTRICT --check-prefix=CHECK1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=false not  %run %t test1 2>&1 | FileCheck %s --check-prefix=CHECK1-NONSTRICT --check-prefix=CHECK1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=true not %run %t test1 2>&1 | FileCheck %s --check-prefix=CHECK1-STRICT --check-prefix=CHECK1
+// RUN: %env_asan_opts=strict_string_checks=false not  %run %t test1 2>&1 | FileCheck %s --check-prefix=CHECK1-NONSTRICT --check-prefix=CHECK1
+// RUN: %env_asan_opts=strict_string_checks=true not %run %t test1 2>&1 | FileCheck %s --check-prefix=CHECK1-STRICT --check-prefix=CHECK1
 // RUN: not %run %t test2 2>&1 | FileCheck %s --check-prefix=CHECK2-NONSTRICT --check-prefix=CHECK2
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=false not  %run %t test2 2>&1 | FileCheck %s --check-prefix=CHECK2-NONSTRICT --check-prefix=CHECK2
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=true not %run %t test2 2>&1 | FileCheck %s --check-prefix=CHECK2-STRICT --check-prefix=CHECK2
+// RUN: %env_asan_opts=strict_string_checks=false not  %run %t test2 2>&1 | FileCheck %s --check-prefix=CHECK2-NONSTRICT --check-prefix=CHECK2
+// RUN: %env_asan_opts=strict_string_checks=true not %run %t test2 2>&1 | FileCheck %s --check-prefix=CHECK2-STRICT --check-prefix=CHECK2
 
 #include <assert.h>
 #include <stdlib.h>
 #include <string.h>
 
 void test1(char *to, int to_size, char *from) {
   // One of arguments points to not allocated memory.
   char* r = strcat(to + to_size, from);

test/asan/TestCases/strchr_strict.c

 // Test strict_string_checks option in strchr function
 // RUN: %clang_asan %s -o %t && %run %t 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=false %run %t 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=true not %run %t 2>&1 | FileCheck %s
+// RUN: %env_asan_opts=strict_string_checks=false %run %t 2>&1
+// RUN: %env_asan_opts=strict_string_checks=true not %run %t 2>&1 | FileCheck %s
 
 #include <assert.h>
 #include <stdlib.h>
 #include <string.h>
 
 int main(int argc, char **argv) {
   size_t size = 100;
   char fill = 'o';

test/asan/TestCases/strcmp_strict.c

 // Test strict_string_checks option in strcmp function
 // RUN: %clang_asan %s -o %t && %run %t 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=false %run %t 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=true not %run %t 2>&1 | FileCheck %s
+// RUN: %env_asan_opts=strict_string_checks=false %run %t 2>&1
+// RUN: %env_asan_opts=strict_string_checks=true not %run %t 2>&1 | FileCheck %s
 
 #include <assert.h>
 #include <stdlib.h>
 #include <string.h>
 
 int main(int argc, char **argv) {
   size_t size = 100;
   char fill = 'o';

test/asan/TestCases/strcspn-1.c

 // Test string s1 overflow in strcspn function
-// RUN: %clang_asan %s -o %t && env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=true not %run %t 2>&1 | FileCheck %s
+// RUN: %clang_asan %s -o %t && %env_asan_opts=strict_string_checks=true not %run %t 2>&1 | FileCheck %s
 
 // Test intercept_strspn asan option
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:intercept_strspn=false %run %t 2>&1
+// RUN: %env_asan_opts=intercept_strspn=false %run %t 2>&1
 
 #include <assert.h>
 #include <string.h>
 
 int main(int argc, char **argv) {
   size_t r;
   char s2[] = "ab";
   char s1[] = {'c', 'a'};
   char s3 = 0;
   r = strcspn(s1, s2);
   // CHECK:'s{{[1|3]}}' <== Memory access at offset {{[0-9]+ .*}}flows this variable
   assert(r == 1);
   return 0;
 }

test/asan/TestCases/strcspn-2.c

 // Test stopset overflow in strcspn function
-// RUN: %clang_asan %s -o %t && env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=true not %run %t 2>&1 | FileCheck %s
+// RUN: %clang_asan %s -o %t && %env_asan_opts=strict_string_checks=true not %run %t 2>&1 | FileCheck %s
 
 // Test intercept_strcspn asan option
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:intercept_strspn=false %run %t 2>&1
+// RUN: %env_asan_opts=intercept_strspn=false %run %t 2>&1
 
 #include <assert.h>
 #include <string.h>
 
 int main(int argc, char **argv) {
   size_t r;
   char s1[] = "ab";
   char s2[] = {'a'};
   char s3 = 0;
   r = strcspn(s1, s2);
   // CHECK:'s{{[2|3]}}' <== Memory access at offset {{[0-9]+ .*}}flows this variable
   assert(r == 0);
   return 0;
 }

test/asan/TestCases/strcspn_strict.c

 // Test strict_string_checks option in strcspn function
 // RUN: %clang_asan %s -o %t && %run %t 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=false %run %t 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=true not %run %t 2>&1 | FileCheck %s
+// RUN: %env_asan_opts=strict_string_checks=false %run %t 2>&1
+// RUN: %env_asan_opts=strict_string_checks=true not %run %t 2>&1 | FileCheck %s
 
 #include <assert.h>
 #include <stdlib.h>
 #include <string.h>
 
 int main(int argc, char **argv) {
   size_t size = 100;
   char fill = 'o';

test/asan/TestCases/strncat_strict.c

 // Test strict_string_checks option in strncat function
 // RUN: %clang_asan %s -o %t
 // RUN: not %run %t test1 2>&1 | FileCheck %s --check-prefix=CHECK1-NONSTRICT --check-prefix=CHECK1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=false not  %run %t test1 2>&1 | FileCheck %s --check-prefix=CHECK1-NONSTRICT --check-prefix=CHECK1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=true not %run %t test1 2>&1 | FileCheck %s --check-prefix=CHECK1-STRICT --check-prefix=CHECK1
+// RUN: %env_asan_opts=strict_string_checks=false not  %run %t test1 2>&1 | FileCheck %s --check-prefix=CHECK1-NONSTRICT --check-prefix=CHECK1
+// RUN: %env_asan_opts=strict_string_checks=true not %run %t test1 2>&1 | FileCheck %s --check-prefix=CHECK1-STRICT --check-prefix=CHECK1
 // RUN: not %run %t test2 2>&1 | FileCheck %s --check-prefix=CHECK2-NONSTRICT --check-prefix=CHECK2
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=false not  %run %t test2 2>&1 | FileCheck %s --check-prefix=CHECK2-NONSTRICT --check-prefix=CHECK2
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=true not %run %t test2 2>&1 | FileCheck %s --check-prefix=CHECK2-STRICT --check-prefix=CHECK2
+// RUN: %env_asan_opts=strict_string_checks=false not  %run %t test2 2>&1 | FileCheck %s --check-prefix=CHECK2-NONSTRICT --check-prefix=CHECK2
+// RUN: %env_asan_opts=strict_string_checks=true not %run %t test2 2>&1 | FileCheck %s --check-prefix=CHECK2-STRICT --check-prefix=CHECK2
 
 #include <assert.h>
 #include <stdlib.h>
 #include <string.h>
 
 void test1(char *to, int to_size, char *from) {
   // One of arguments points to not allocated memory.
   char* r = strncat(to + to_size, from, 2);

test/asan/TestCases/strpbrk-1.c

 // Test string s1 overflow in strpbrk function
-// RUN: %clang_asan %s -o %t && env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=true not %run %t 2>&1 | FileCheck %s
+// RUN: %clang_asan %s -o %t && %env_asan_opts=strict_string_checks=true not %run %t 2>&1 | FileCheck %s
 
 // Test intercept_strpbrk asan option
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:intercept_strpbrk=false %run %t 2>&1
+// RUN: %env_asan_opts=intercept_strpbrk=false %run %t 2>&1
 
 #include <assert.h>
 #include <string.h>
 
 int main(int argc, char **argv) {
   char *r;
   char s2[] = "ab";
   char s1[] = {'c', 'a'};
   char s3 = 0;
   r = strpbrk(s1, s2);
   // CHECK:'s{{[1|3]}}' <== Memory access at offset {{[0-9]+ .*}}flows this variable
   assert(r == s1 + 1);
   return 0;
 }

test/asan/TestCases/strpbrk-2.c

 // Test stopset overflow in strpbrk function
-// RUN: %clang_asan %s -o %t && env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=true not %run %t 2>&1 | FileCheck %s
+// RUN: %clang_asan %s -o %t && %env_asan_opts=strict_string_checks=true not %run %t 2>&1 | FileCheck %s
 
 // Test intercept_strpbrk asan option
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:intercept_strpbrk=false %run %t 2>&1
+// RUN: %env_asan_opts=intercept_strpbrk=false %run %t 2>&1
 
 #include <assert.h>
 #include <string.h>
 
 int main(int argc, char **argv) {
   char *r;
   char s1[] = "c";
   char s2[] = {'b', 'c'};
   char s3 = 0;
   r = strpbrk(s1, s2);
   // CHECK:'s{{[2|3]}}' <== Memory access at offset {{[0-9]+ .*}}flows this variable
   assert(r == s1);
   return 0;
 }

test/asan/TestCases/strpbrk_strict.c

 // Test strict_string_checks option in strpbrk function
 // RUN: %clang_asan %s -o %t && %run %t 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=false %run %t 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=true not %run %t 2>&1 | FileCheck %s
+// RUN: %env_asan_opts=strict_string_checks=false %run %t 2>&1
+// RUN: %env_asan_opts=strict_string_checks=true not %run %t 2>&1 | FileCheck %s
 
 #include <assert.h>
 #include <stdlib.h>
 #include <string.h>
 
 int main(int argc, char **argv) {
   size_t size = 100;
   char fill = 'o';

test/asan/TestCases/strspn-1.c

 // Test string s1 overflow in strspn function
-// RUN: %clang_asan %s -o %t && env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=true not %run %t 2>&1 | FileCheck %s
+// RUN: %clang_asan %s -o %t && %env_asan_opts=strict_string_checks=true not %run %t 2>&1 | FileCheck %s
 
 // Test intercept_strspn asan option
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:intercept_strspn=false %run %t 2>&1
+// RUN: %env_asan_opts=intercept_strspn=false %run %t 2>&1
 
 #include <assert.h>
 #include <string.h>
 
 int main(int argc, char **argv) {
   size_t r;
   char s2[] = "ab";
   char s1[] = {'a', 'c'};
   char s3 = 0;
   r = strspn(s1, s2);
   // CHECK:'s{{[1|3]}}' <== Memory access at offset {{[0-9]+ .*}}flows this variable
   assert(r == 1);
   return 0;
 }

test/asan/TestCases/strspn-2.c

 // Test stopset overflow in strspn function
-// RUN: %clang_asan %s -o %t && env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=true not %run %t 2>&1 | FileCheck %s
+// RUN: %clang_asan %s -o %t && %env_asan_opts=strict_string_checks=true not %run %t 2>&1 | FileCheck %s
 
 // Test intercept_strspn asan option
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:intercept_strspn=false %run %t 2>&1
+// RUN: %env_asan_opts=intercept_strspn=false %run %t 2>&1
 
 #include <assert.h>
 #include <string.h>
 
 int main(int argc, char **argv) {
   size_t r;
   char s1[] = "bbc";
   char s2[] = {'a', 'b'};
   char s3 = 0;
   r = strspn(s1, s2);
   // CHECK:'s{{[2|3]}}' <== Memory access at offset {{[0-9]+ .*}}flows this variable
   assert(r >= 2);
   return 0;
 }

test/asan/TestCases/strspn_strict.c

 // Test strict_str`ing_checks option in strspn function
 // RUN: %clang_asan %s -o %t && %run %t 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=false %run %t 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=true not %run %t 2>&1 | FileCheck %s
+// RUN: %env_asan_opts=strict_string_checks=false %run %t 2>&1
+// RUN: %env_asan_opts=strict_string_checks=true not %run %t 2>&1 | FileCheck %s
 
 #include <assert.h>
 #include <stdlib.h>
 #include <string.h>
 
 int main(int argc, char **argv) {
   size_t size = 100;
   char fill = 'o';

test/asan/TestCases/strstr-1.c

 // Test haystack overflow in strstr function
-// RUN: %clang_asan %s -o %t && env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=true not %run %t 2>&1 | FileCheck %s
+// RUN: %clang_asan %s -o %t && %env_asan_opts=strict_string_checks=true not %run %t 2>&1 | FileCheck %s
 
 // Test intercept_strstr asan option
 // Disable other interceptors because strlen may be called inside strstr
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:intercept_strstr=false:replace_str=false %run %t 2>&1
+// RUN: %env_asan_opts=intercept_strstr=false:replace_str=false %run %t 2>&1
 
 #include <assert.h>
 #include <string.h>
 
 int main(int argc, char **argv) {
   char *r = 0;
   char s2[] = "c";
   char s1[] = {'a', 'c'};
   char s3 = 0;
   r = strstr(s1, s2);
   // CHECK:'s{{[1|3]}}' <== Memory access at offset {{[0-9]+ .*}}flows this variable
   assert(r == s1 + 1);
   return 0;
 }

test/asan/TestCases/strstr-2.c

 // Test needle overflow in strstr function
-// RUN: %clang_asan %s -o %t && env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=true not %run %t 2>&1 | FileCheck %s
+// RUN: %clang_asan %s -o %t && %env_asan_opts=strict_string_checks=true not %run %t 2>&1 | FileCheck %s
 
 // Test intercept_strstr asan option
 // Disable other interceptors because strlen may be called inside strstr
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:intercept_strstr=false:replace_str=false %run %t 2>&1
+// RUN: %env_asan_opts=intercept_strstr=false:replace_str=false %run %t 2>&1
 
 #include <assert.h>
 #include <string.h>
 
 int main(int argc, char **argv) {
   char *r = 0;
   char s1[] = "ab";
   char s2[] = {'c'};
   char s3 = 0;
   r = strstr(s1, s2);
   // CHECK:'s{{[2|3]}}' <== Memory access at offset {{[0-9]+ .*}}flows this variable
   assert(r == 0);
   return 0;
 }

test/asan/TestCases/strstr_strict.c

 // Test strict_string_checks option in strstr function
 // RUN: %clang_asan %s -o %t && %run %t 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=false %run %t 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=true not %run %t 2>&1 | FileCheck %s
+// RUN: %env_asan_opts=strict_string_checks=false %run %t 2>&1
+// RUN: %env_asan_opts=strict_string_checks=true not %run %t 2>&1 | FileCheck %s
 
 #include <assert.h>
 #include <stdlib.h>
 #include <string.h>
 
 int main(int argc, char **argv) {
   size_t size = 100;
   char fill = 'o';

test/asan/TestCases/strtol_strict.c

 // Test strict_string_checks option in strtol function
 // RUN: %clang_asan -DTEST1 %s -o %t
 // RUN: %run %t test1 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=false %run %t test1 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=true not %run %t test1 2>&1 | FileCheck %s --check-prefix=CHECK1
+// RUN: %env_asan_opts=strict_string_checks=false %run %t test1 2>&1
+// RUN: %env_asan_opts=strict_string_checks=true not %run %t test1 2>&1 | FileCheck %s --check-prefix=CHECK1
 // RUN: %run %t test2 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=false %run %t test2 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=true not %run %t test2 2>&1 | FileCheck %s --check-prefix=CHECK2
+// RUN: %env_asan_opts=strict_string_checks=false %run %t test2 2>&1
+// RUN: %env_asan_opts=strict_string_checks=true not %run %t test2 2>&1 | FileCheck %s --check-prefix=CHECK2
 // RUN: %run %t test3 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=false %run %t test3 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=true not %run %t test3 2>&1 | FileCheck %s --check-prefix=CHECK3
+// RUN: %env_asan_opts=strict_string_checks=false %run %t test3 2>&1
+// RUN: %env_asan_opts=strict_string_checks=true not %run %t test3 2>&1 | FileCheck %s --check-prefix=CHECK3
 // RUN: %run %t test4 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=false %run %t test4 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=true not %run %t test4 2>&1 | FileCheck %s --check-prefix=CHECK4
+// RUN: %env_asan_opts=strict_string_checks=false %run %t test4 2>&1
+// RUN: %env_asan_opts=strict_string_checks=true not %run %t test4 2>&1 | FileCheck %s --check-prefix=CHECK4
 // RUN: %run %t test5 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=false %run %t test5 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=true not %run %t test5 2>&1 | FileCheck %s --check-prefix=CHECK5
+// RUN: %env_asan_opts=strict_string_checks=false %run %t test5 2>&1
+// RUN: %env_asan_opts=strict_string_checks=true not %run %t test5 2>&1 | FileCheck %s --check-prefix=CHECK5
 // RUN: %run %t test6 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=false %run %t test6 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=true not %run %t test6 2>&1 | FileCheck %s --check-prefix=CHECK6
+// RUN: %env_asan_opts=strict_string_checks=false %run %t test6 2>&1
+// RUN: %env_asan_opts=strict_string_checks=true not %run %t test6 2>&1 | FileCheck %s --check-prefix=CHECK6
 // RUN: %run %t test7 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=false %run %t test7 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=true not %run %t test7 2>&1 | FileCheck %s --check-prefix=CHECK7
+// RUN: %env_asan_opts=strict_string_checks=false %run %t test7 2>&1
+// RUN: %env_asan_opts=strict_string_checks=true not %run %t test7 2>&1 | FileCheck %s --check-prefix=CHECK7
 
 #include <assert.h>
 #include <stdlib.h>
 #include <string.h>
 #include <sanitizer/asan_interface.h>
 
 void test1(char *array, char *endptr) {
   // Buffer overflow if there is no terminating null (depends on base)

test/asan/TestCases/strtoll_strict.c

 // Test strict_string_checks option in strtoll function
 // RUN: %clang_asan -DTEST1 %s -o %t
 // RUN: %run %t test1 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=false %run %t test1 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=true not %run %t test1 2>&1 | FileCheck %s --check-prefix=CHECK1
+// RUN: %env_asan_opts=strict_string_checks=false %run %t test1 2>&1
+// RUN: %env_asan_opts=strict_string_checks=true not %run %t test1 2>&1 | FileCheck %s --check-prefix=CHECK1
 // RUN: %run %t test2 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=false %run %t test2 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=true not %run %t test2 2>&1 | FileCheck %s --check-prefix=CHECK2
+// RUN: %env_asan_opts=strict_string_checks=false %run %t test2 2>&1
+// RUN: %env_asan_opts=strict_string_checks=true not %run %t test2 2>&1 | FileCheck %s --check-prefix=CHECK2
 // RUN: %run %t test3 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=false %run %t test3 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=true not %run %t test3 2>&1 | FileCheck %s --check-prefix=CHECK3
+// RUN: %env_asan_opts=strict_string_checks=false %run %t test3 2>&1
+// RUN: %env_asan_opts=strict_string_checks=true not %run %t test3 2>&1 | FileCheck %s --check-prefix=CHECK3
 // RUN: %run %t test4 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=false %run %t test4 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=true not %run %t test4 2>&1 | FileCheck %s --check-prefix=CHECK4
+// RUN: %env_asan_opts=strict_string_checks=false %run %t test4 2>&1
+// RUN: %env_asan_opts=strict_string_checks=true not %run %t test4 2>&1 | FileCheck %s --check-prefix=CHECK4
 // RUN: %run %t test5 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=false %run %t test5 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=true not %run %t test5 2>&1 | FileCheck %s --check-prefix=CHECK5
+// RUN: %env_asan_opts=strict_string_checks=false %run %t test5 2>&1
+// RUN: %env_asan_opts=strict_string_checks=true not %run %t test5 2>&1 | FileCheck %s --check-prefix=CHECK5
 // RUN: %run %t test6 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=false %run %t test6 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=true not %run %t test6 2>&1 | FileCheck %s --check-prefix=CHECK6
+// RUN: %env_asan_opts=strict_string_checks=false %run %t test6 2>&1
+// RUN: %env_asan_opts=strict_string_checks=true not %run %t test6 2>&1 | FileCheck %s --check-prefix=CHECK6
 // RUN: %run %t test7 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=false %run %t test7 2>&1
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:strict_string_checks=true not %run %t test7 2>&1 | FileCheck %s --check-prefix=CHECK7
+// RUN: %env_asan_opts=strict_string_checks=false %run %t test7 2>&1
+// RUN: %env_asan_opts=strict_string_checks=true not %run %t test7 2>&1 | FileCheck %s --check-prefix=CHECK7
 
 #include <assert.h>
 #include <stdlib.h>
 #include <string.h>
 #include <sanitizer/asan_interface.h>
 
 void test1(char *array, char *endptr) {
   // Buffer overflow if there is no terminating null (depends on base)

test/asan/TestCases/suppressions-function.cc

 // Check that without suppressions, we catch the issue.
 // RUN: %clangxx_asan -O0 %s -o %t
 // RUN: not %run %t 2>&1 | FileCheck --check-prefix=CHECK-CRASH %s
 
 // RUN: echo "interceptor_via_fun:crash_function" > %t.supp
-// RUN: %clangxx_asan -O0 %s -o %t && ASAN_OPTIONS="$ASAN_OPTIONS:suppressions='%t.supp'" %run %t 2>&1 | FileCheck --check-prefix=CHECK-IGNORE %s
-// RUN: %clangxx_asan -O3 %s -o %t && ASAN_OPTIONS="$ASAN_OPTIONS:suppressions='%t.supp'" %run %t 2>&1 | FileCheck --check-prefix=CHECK-IGNORE %s
+// RUN: %clangxx_asan -O0 %s -o %t && %env_asan_opts=suppressions='%t.supp' %run %t 2>&1 | FileCheck --check-prefix=CHECK-IGNORE %s
+// RUN: %clangxx_asan -O3 %s -o %t && %env_asan_opts=suppressions='%t.supp' %run %t 2>&1 | FileCheck --check-prefix=CHECK-IGNORE %s
 
 // XFAIL: android
 
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
 void crash_function() {

test/asan/TestCases/use-after-poison.cc

 // Check that __asan_poison_memory_region works.
 // RUN: %clangxx_asan -O0 %s -o %t && not %run %t 2>&1 | FileCheck %s
 //
 // Check that we can disable it
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:allow_user_poisoning=0 %run %t
+// RUN: %env_asan_opts=allow_user_poisoning=0 %run %t
 
 #include <stdlib.h>
 
 extern "C" void __asan_poison_memory_region(void *, size_t);
 
 int main(int argc, char **argv) {
   char *x = new char[16];
   x[10] = 0;
   __asan_poison_memory_region(x, 16);
   int res = x[argc * 10];  // BOOOM
   // CHECK: ERROR: AddressSanitizer: use-after-poison
   // CHECK: main{{.*}}use-after-poison.cc:[[@LINE-2]]
   delete [] x;
   return res;
 }

test/asan/TestCases/verbose-log-path_test.cc

 // RUN: %clangxx_asan %s -o %T/verbose-log-path_test-binary
 
 // Good log_path.
 // RUN: rm -f %T/asan.log.*
-// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:log_path=%T/asan.log:log_exe_name=1 not %run %T/verbose-log-path_test-binary 2> %t.out
+// RUN: %env_asan_opts=log_path=%T/asan.log:log_exe_name=1 not %run %T/verbose-log-path_test-binary 2> %t.out
 // RUN: FileCheck %s --check-prefix=CHECK-ERROR < %T/asan.log.verbose-log-path_test-binary.*
 
 // FIXME: only FreeBSD and Linux have verbose log paths now.
 // XFAIL: win32,android
 
 #include <stdlib.h>
 #include <string.h>
 int main(int argc, char **argv) {
   if (argc > 2) return 0;
   char *x = (char*)malloc(10);
   memset(x, 0, 10);
   int res = x[argc * 10];  // BOOOM
   free(x);
   return res;
 }
 // CHECK-ERROR: ERROR: AddressSanitizer

test/asan/lit.cfg

def push_dynamic_library_lookup_path(config, new_path):
   new_ld_library_path = os.path.pathsep.join(
     (new_path, config.environment.get(dynamic_library_lookup_var, '')))
   config.environment[dynamic_library_lookup_var] = new_ld_library_path
 
 # Setup config name.
 config.name = 'AddressSanitizer' + config.name_suffix
 
 # Platform-specific default ASAN_OPTIONS for lit tests.
+default_asan_opts = ''
 if config.host_os == 'Darwin':
   # On Darwin, we default to `abort_on_error=1`, which would make tests run
   # much slower. Let's override this and run lit tests with 'abort_on_error=0'.
-  config.environment['ASAN_OPTIONS'] = 'abort_on_error=0'
+  default_asan_opts = 'abort_on_error=0'
+config.environment['ASAN_OPTIONS'] = default_asan_opts
+if default_asan_opts:
+  default_asan_opts += ':'
+config.substitutions.append(('%env_asan_opts=',
+                             'env ASAN_OPTIONS=' + default_asan_opts))
 
 # Setup source root.
 config.test_source_root = os.path.dirname(__file__)
 
 # There is no libdl on FreeBSD.
 if config.host_os != 'FreeBSD':
   libdl_flag = "-ldl"
 else: