XFAIL dexter tests that broke greendragon.

The patch in https://reviews.llvm.org/D151465 broke greendragon, because
it is hardcoding the use of libstdc++ which is not available on darwin.

XFAILing these tests till they can be fixed.

cross-project-tests/debuginfo-tests/dexter-tests/aggregate-indirect-arg.cpp

@@ -1,5 +1,6 @@
 // REQUIRES: lldb
 // UNSUPPORTED: system-windows
+// XFAIL: system-darwin
 //
 // RUN: %clang -std=gnu++11 -O0 -g -lstdc++ %s -o %t
 // RUN: %dexter --fail-lt 1.0 -w \

cross-project-tests/debuginfo-tests/dexter-tests/ctor.cpp

@@ -1,5 +1,6 @@
 // REQUIRES: lldb
 // UNSUPPORTED: system-windows
+// XFAIL: system-darwin
 //
 // RUN: %clang -std=gnu++11 -O0 -glldb %s -o %t
 // RUN: %dexter --fail-lt 1.0 -w \

cross-project-tests/debuginfo-tests/dexter-tests/dbg-arg.c

@@ -1,5 +1,6 @@
 // REQUIRES: lldb
 // UNSUPPORTED: system-windows
+// XFAIL: system-darwin
 //
 // This test case checks debug info during register moves for an argument.
 // RUN: %clang -std=gnu11 -m64 -mllvm -fast-isel=false -g %s -o %t

cross-project-tests/debuginfo-tests/dexter-tests/deferred_globals.cpp

@@ -4,6 +4,7 @@
 
 // REQUIRES: lldb
 // UNSUPPORTED: system-windows
+// XFAIL: system-darwin
 // RUN: %clang -std=gnu++11 -O0 -g %s -o %t
 // RUN: %dexter --fail-lt 1.0 -w \
 // RUN:     --binary  %t --debugger 'lldb' -v -- %s

cross-project-tests/debuginfo-tests/dexter-tests/memvars/ctrl-flow.c

@@ -1,5 +1,6 @@
 // REQUIRES: lldb
 // UNSUPPORTED: system-windows
+// XFAIL: system-darwin
 // RUN: %clang -std=gnu11 -O2 -glldb %s -o %t
 // RUN: %dexter --fail-lt 1.0 -w --debugger lldb --binary %t -- %s
 

cross-project-tests/debuginfo-tests/dexter-tests/memvars/inlining.c

@@ -1,5 +1,6 @@
 // REQUIRES: lldb
 // UNSUPPORTED: system-windows
+// XFAIL: system-darwin
 // RUN: %clang -std=gnu11 -O2 -glldb %s -o %t
 // RUN: %dexter --fail-lt 1.0 -w --debugger lldb --binary %t -- %s
 //

cross-project-tests/debuginfo-tests/dexter-tests/namespace.cpp

@@ -4,6 +4,7 @@
 
 // REQUIRES: lldb
 // UNSUPPORTED: system-windows
+// XFAIL: system-darwin
 
 // RUN: %clang -g -O0 %s -o %t
 // RUN: %dexter --fail-lt 1.0 -w \

cross-project-tests/debuginfo-tests/dexter-tests/stack-var.c

@@ -1,5 +1,6 @@
 // REQUIRES: lldb
 // UNSUPPORTED: system-windows
+// XFAIL: system-darwin
 //
 // RUN: %clang -std=gnu11 -O -glldb %s -o %t
 // RUN: %dexter --fail-lt 1.0 -w --binary %t --debugger 'lldb' -- %s

cross-project-tests/debuginfo-tests/dexter-tests/vla.c

@@ -1,6 +1,7 @@
 // This test case verifies the debug location for variable-length arrays.
 // REQUIRES: lldb
 // UNSUPPORTED: system-windows
+// XFAIL: system-darwin
 //
 // RUN: %clang -std=gnu11 -O0 -glldb %s -o %t
 // RUN: %dexter --fail-lt 1.0 -w --binary %t --debugger 'lldb' -- %s

cross-project-tests/debuginfo-tests/dexter/feature_tests/commands/perfect/command_line.c

@@ -1,5 +1,6 @@
 // The dbgeng driver doesn't support \DexCommandLine yet.
 // UNSUPPORTED: system-windows
+// XFAIL: system-darwin
 //
 // RUN: %dexter_regression_test_build %s -o %t
 // RUN: %dexter_regression_test_run --binary %t -- %s | FileCheck %s

cross-project-tests/debuginfo-tests/dexter/feature_tests/commands/perfect/dex_declare_address/address_after_ref.cpp

@@ -2,6 +2,7 @@
 //      Test that a \DexDeclareAddress value can have its value defined after
 //      the first reference to that value.
 //
+// XFAIL: system-darwin
 // RUN: %dexter_regression_test_build %s -o %t
 // RUN: %dexter_regression_test_run --binary %t -- %s | FileCheck %s
 // CHECK: address_after_ref.cpp

cross-project-tests/debuginfo-tests/dexter/feature_tests/commands/perfect/dex_declare_address/address_hit_count.cpp

@@ -4,6 +4,7 @@
 //      expression after the target line has been stepped on a given number of
 //      times.
 //
+// XFAIL: system-darwin
 // RUN: %dexter_regression_test_build %s -o %t
 // RUN: %dexter_regression_test_run --binary %t -- %s | FileCheck %s
 // CHECK: address_hit_count.cpp

cross-project-tests/debuginfo-tests/dexter/feature_tests/commands/perfect/dex_declare_address/expression_address.cpp

@@ -2,6 +2,7 @@
 //      Test that a \DexDeclareAddress value can be used to compare the
 //      addresses of two local variables that refer to the same address.
 //
+// XFAIL: system-darwin
 // RUN: %dexter_regression_test_build %s -o %t
 // RUN: %dexter_regression_test_run --binary %t -- %s | FileCheck %s
 // CHECK: expression_address.cpp

cross-project-tests/debuginfo-tests/dexter/feature_tests/commands/perfect/dex_declare_address/identical_address.cpp

@@ -2,6 +2,7 @@
 //      Test that a \DexDeclareAddress value can be used to compare two equal
 //      pointer variables.
 //
+// XFAIL: system-darwin
 // RUN: %dexter_regression_test_build %s -o %t
 // RUN: %dexter_regression_test_run --binary %t -- %s | FileCheck %s
 // CHECK: identical_address.cpp

cross-project-tests/debuginfo-tests/dexter/feature_tests/commands/perfect/dex_declare_address/multiple_address.cpp

@@ -2,6 +2,7 @@
 //      Test that multiple \DexDeclareAddress references that point to different
 //      addresses can be used within a single \DexExpectWatchValue.
 //
+// XFAIL: system-darwin
 // RUN: %dexter_regression_test_build %s -o %t
 // RUN: %dexter_regression_test_run --binary %t -- %s | FileCheck %s
 // CHECK: multiple_address.cpp

cross-project-tests/debuginfo-tests/dexter/feature_tests/commands/perfect/dex_declare_address/offset_address.cpp

@@ -2,6 +2,7 @@
 //      Test that a \DexDeclareAddress value can be used to compare two pointer
 //      variables that have a fixed offset between them.
 //
+// XFAIL: system-darwin
 // RUN: %dexter_regression_test_build %s -o %t
 // RUN: %dexter_regression_test_run --binary %t -- %s | FileCheck %s
 // CHECK: offset_address.cpp

cross-project-tests/debuginfo-tests/dexter/feature_tests/commands/perfect/dex_declare_address/self_comparison.cpp

@@ -2,6 +2,7 @@
 //      Test that a \DexDeclareAddress value can be used to check the change in
 //      value of a variable over time, relative to its initial value.
 //
+// XFAIL: system-darwin
 // RUN: %dexter_regression_test_build %s -o %t
 // RUN: %dexter_regression_test_run --binary %t -- %s | FileCheck %s
 // CHECK: self_comparison.cpp

cross-project-tests/debuginfo-tests/dexter/feature_tests/commands/perfect/dex_finish_test/default_conditional.cpp

@@ -6,6 +6,7 @@
 //      condition (x == 5) is satisfied.
 //      Tests using the default controller (no \DexLimitSteps).
 //
+// XFAIL: system-darwin
 // RUN: %dexter_regression_test_build %s -o %t
 // RUN: %dexter_regression_test_run --binary %t -- %s | FileCheck %s
 // CHECK: default_conditional.cpp

cross-project-tests/debuginfo-tests/dexter/feature_tests/commands/perfect/dex_finish_test/default_conditional_hit_count.cpp

@@ -7,6 +7,7 @@
 //      given number of times.
 //      Tests using the default controller (no \DexLimitSteps).
 //
+// XFAIL: system-darwin
 // RUN: %dexter_regression_test_build %s -o %t
 // RUN: %dexter_regression_test_run --binary %t -- %s | FileCheck %s
 // CHECK: default_conditional_hit_count.cpp

cross-project-tests/debuginfo-tests/dexter/feature_tests/commands/perfect/dex_finish_test/default_hit_count.cpp

@@ -4,6 +4,7 @@
 //      specific number of times.
 //      Tests using the default controller (no \DexLimitSteps).
 //
+// XFAIL: system-darwin
 // RUN: %dexter_regression_test_build %s -o %t
 // RUN: %dexter_regression_test_run --binary %t -- %s | FileCheck %s
 // CHECK: default_hit_count.cpp

cross-project-tests/debuginfo-tests/dexter/feature_tests/commands/perfect/dex_finish_test/default_simple.cpp

@@ -4,6 +4,7 @@
 //      is stepped on.
 //      Tests using the default controller (no \DexLimitSteps).
 //
+// XFAIL: system-darwin
 // RUN: %dexter_regression_test_build %s -o %t
 // RUN: %dexter_regression_test_run --binary %t -- %s | FileCheck %s
 // CHECK: default_simple.cpp

cross-project-tests/debuginfo-tests/dexter/feature_tests/commands/perfect/dex_finish_test/limit_steps_conditional.cpp

@@ -6,6 +6,7 @@
 //
 // The dbgeng driver doesn't support \DexLimitSteps yet.
 // UNSUPPORTED: system-windows
+// XFAIL: system-darwin
 //
 // RUN: %dexter_regression_test_build %s -o %t
 // RUN: %dexter_regression_test_run --binary %t -- %s | FileCheck %s

cross-project-tests/debuginfo-tests/dexter/feature_tests/commands/perfect/dex_finish_test/limit_steps_conditional_hit_count.cpp

@@ -7,6 +7,7 @@
 //
 // The dbgeng driver doesn't support \DexLimitSteps yet.
 // UNSUPPORTED: system-windows
+// XFAIL: system-darwin
 //
 // RUN: %dexter_regression_test_build %s -o %t
 // RUN: %dexter_regression_test_run --binary %t -- %s | FileCheck %s

cross-project-tests/debuginfo-tests/dexter/feature_tests/commands/perfect/dex_finish_test/limit_steps_hit_count.cpp

@@ -6,6 +6,7 @@
 //
 // The dbgeng driver doesn't support \DexLimitSteps yet.
 // UNSUPPORTED: system-windows
+// XFAIL: system-darwin
 //
 // RUN: %dexter_regression_test_build %s -o %t
 // RUN: %dexter_regression_test_run --binary %t -- %s | FileCheck %s

cross-project-tests/debuginfo-tests/dexter/feature_tests/commands/perfect/limit_steps/hit_count.cpp

@@ -2,6 +2,7 @@
 //      Test that \DexLimitSteps keyword argument hit_count correctly limits
 //      the number of times the command can trigger.
 //
+// XFAIL: system-darwin
 // RUN: %dexter_regression_test_build %s -o %t
 // RUN: %dexter_regression_test_run --binary %t -- %s | FileCheck %s
 // CHECK: hit_count.cpp

cross-project-tests/debuginfo-tests/dexter/feature_tests/commands/perfect/limit_steps/limit_steps_check_json_step_count.cpp

@@ -1,6 +1,7 @@
 // Purpose:
 //      Check number of step lines are correctly reported in json output.
 //
+// XFAIL: system-darwin
 // RUN: %dexter_regression_test_build %s -o %t
 // RUN: %dexter_regression_test_run --binary %t --verbose -- %s | FileCheck %s
 // CHECK: limit_steps_check_json_step_count.cpp

cross-project-tests/debuginfo-tests/dexter/feature_tests/commands/perfect/limit_steps/limit_steps_expect_loop.cpp

@@ -2,6 +2,7 @@
 //      Check the DexLimit steps only gathers step info for 2 iterations of a
 //      for loop.
 //
+// XFAIL: system-darwin
 // RUN: %dexter_regression_test_build %s -o %t
 // RUN: %dexter_regression_test_run --binary %t -- %s | FileCheck %s
 // CHECK: limit_steps_expect_loop.cpp:

cross-project-tests/debuginfo-tests/dexter/feature_tests/commands/perfect/limit_steps/limit_steps_expect_value.cpp

@@ -1,6 +1,7 @@
 // Purpose:
 //      Ensure that limited stepping breaks for all expected values.
 //
+// XFAIL: system-darwin
 // RUN: %dexter_regression_test_build %s -o %t
 // RUN: %dexter_regression_test_run --binary %t -- %s | FileCheck %s
 // CHECK: limit_steps_expect_value.cpp

cross-project-tests/debuginfo-tests/dexter/feature_tests/commands/perfect/limit_steps/limit_steps_line_mismatch.cpp

@@ -3,6 +3,7 @@
 //      doesn't exist. This can happen due to optimisations or label is on an
 //      empty line.
 //
+// XFAIL: system-darwin
 // RUN: %dexter_regression_test_build %s -o %t
 // RUN: %dexter_regression_test_run --binary %t -- %s | FileCheck %s
 // CHECK: limit_steps_line_mismatch.cpp

cross-project-tests/debuginfo-tests/dexter/feature_tests/commands/perfect/limit_steps/limit_steps_overlapping_ranges.cpp

@@ -1,6 +1,7 @@
 // Purpose:
 //      Ensure that multiple overlapping \DexLimitSteps ranges do not interfere.
 //
+// XFAIL: system-darwin
 // RUN: %dexter_regression_test_build %s -o %t
 // RUN: %dexter_regression_test_run --binary %t -- %s | FileCheck %s
 // CHECK: limit_steps_overlapping_ranges.cpp

cross-project-tests/debuginfo-tests/dexter/feature_tests/commands/perfect/limit_steps/limit_steps_same_line_conditional.cpp

@@ -1,6 +1,7 @@
 // Purpose:
 //      Test that LimitStep commands can exist on the same from line.
 //
+// XFAIL: system-darwin
 // RUN: %dexter_regression_test_build %s -o %t
 // RUN: %dexter_regression_test_run --binary %t -- %s | FileCheck %s
 // CHECK: limit_steps_same_line_conditional.cpp

cross-project-tests/debuginfo-tests/dexter/feature_tests/commands/perfect/limit_steps/unconditional.cpp

@@ -2,6 +2,7 @@
 //      Test that \DexLimitSteps can be used without a condition (i.e. the
 //      breakpoint range is set any time from_line is stepped on).
 //
+// XFAIL: system-darwin
 // RUN: %dexter_regression_test_build %s -o %t
 // RUN: %dexter_regression_test_run --binary %t -- %s | FileCheck %s
 // CHECK: unconditional.cpp

cross-project-tests/debuginfo-tests/dexter/feature_tests/subtools/test/address_printing.cpp

@@ -11,6 +11,7 @@
 // The dbgeng driver doesn't support \DexLimitSteps yet.
 // UNSUPPORTED: system-windows
 //
+// XFAIL: system-darwin
 // RUN: %dexter_regression_test_build %s -o %t
 // RUN: not %dexter_regression_test_run --binary %t -v -- %s | FileCheck %s
 

cross-project-tests/debuginfo-tests/dexter/feature_tests/subtools/test/label_another_line.cpp

@@ -2,6 +2,7 @@
 //    Check that the optional keyword argument 'on_line' makes a \DexLabel label
 //    that line instead of the line the command is found on.
 //
+// XFAIL: system-darwin
 // RUN: %dexter_regression_test_build %s -o %t
 // RUN: %dexter_regression_test_run --binary %t -- %s | FileCheck %s
 // CHECK: label_another_line.cpp: (1.0000)

cross-project-tests/debuginfo-tests/dexter/feature_tests/subtools/test/label_offset.cpp

@@ -1,6 +1,7 @@
 // Purpose:
 //      Check that we can use label-relative line numbers.
 //
+// XFAIL: system-darwin
 // RUN: %dexter_regression_test_build %s -o %t
 // RUN: %dexter_regression_test_run --binary %t -v -- %s | FileCheck %s
 //

cross-project-tests/debuginfo-tests/dexter/feature_tests/subtools/test/target_run_args.c

@@ -1,6 +1,7 @@
 // The dbgeng driver doesn't support --target-run-args yet.
 // UNSUPPORTED: system-windows
 //
+// XFAIL: system-darwin
 // RUN: %dexter_regression_test_build %s -o %t
 // RUN: %dexter_regression_test_run --binary %t --target-run-args "a b 'c d'" -- %s | FileCheck %s
 // CHECK: target_run_args.c:

cross-project-tests/debuginfo-tests/dexter/feature_tests/subtools/test/target_run_args_with_command.c

@@ -1,6 +1,7 @@
 // The dbgeng driver doesn't support --target-run-args yet.
 // UNSUPPORTED: system-windows
 //
+// XFAIL: system-darwin
 // RUN: %dexter_regression_test_build %s -o %t
 // RUN: %dexter_regression_test_run --binary %t --target-run-args "a b 'c d'" -- %s | FileCheck %s
 // CHECK: target_run_args_with_command.c:

cross-project-tests/debuginfo-tests/dexter/feature_tests/subtools/view.cpp

@@ -1,6 +1,7 @@
 // Purpose:
 //      Check the `view` subtool works with typical inputs.
 //
+// XFAIL: system-darwin
 // RUN: %dexter_regression_test_build %s -o %t
 // RUN: %dexter_regression_test_run --binary %t --results %t.results -- %s
 //