Index: test/fuzzer/afl-driver-extra-stats.test
===================================================================
--- test/fuzzer/afl-driver-extra-stats.test
+++ test/fuzzer/afl-driver-extra-stats.test
@@ -1,3 +1,4 @@
+XFAIL: ios
 RUN: %no_fuzzer_cpp_compiler %S/AFLDriverTest.cpp %libfuzzer_src/afl/afl_driver.cpp -o %t-AFLDriverTest
 
 ; Test that not specifying an extra stats file isn't broken.
Index: test/fuzzer/afl-driver-stderr.test
===================================================================
--- test/fuzzer/afl-driver-stderr.test
+++ test/fuzzer/afl-driver-stderr.test
@@ -1,3 +1,4 @@
+XFAIL: ios
 UNSUPPORTED: freebsd
 RUN: %no_fuzzer_cpp_compiler %S/AFLDriverTest.cpp %libfuzzer_src/afl/afl_driver.cpp -o %t-AFLDriverTest
 
Index: test/fuzzer/counters.test
===================================================================
--- test/fuzzer/counters.test
+++ test/fuzzer/counters.test
@@ -1,3 +1,4 @@
+XFAIL: ios
 RUN: %cpp_compiler %S/CounterTest.cpp -o %t-CounterTest
 RUN: not %run %t-CounterTest  -max_len=6 -seed=1 -timeout=15 2>&1 | FileCheck %s --check-prefix=COUNTERS
 
Index: test/fuzzer/fuzzer-printcovpcs.test
===================================================================
--- test/fuzzer/fuzzer-printcovpcs.test
+++ test/fuzzer/fuzzer-printcovpcs.test
@@ -1,3 +1,4 @@
+XFAIL: ios
 RUN: %cpp_compiler %S/SimpleTest.cpp -o %t-SimpleTest
 RUN: not %run %t-SimpleTest -print_pcs=1 -seed=1 2>&1 | FileCheck %s --check-prefix=PCS
 PCS-NOT: NEW_PC
Index: test/fuzzer/merge-posix.test
===================================================================
--- test/fuzzer/merge-posix.test
+++ test/fuzzer/merge-posix.test
@@ -1,3 +1,4 @@
+XFAIL: ios
 RUN: %cpp_compiler %S/FullCoverageSetTest.cpp -o %t-FullCoverageSetTest
 
 RUN: rm -rf  %tmp/T1 %tmp/T2
Index: test/fuzzer/merge-sigusr.test
===================================================================
--- test/fuzzer/merge-sigusr.test
+++ test/fuzzer/merge-sigusr.test
@@ -1,4 +1,5 @@
 # Check that libFuzzer honors SIGUSR1/SIGUSR2
+XFAIL: ios
 RUN: rm -rf %t
 RUN: mkdir -p %t
 RUN: %cpp_compiler %S/SleepOneSecondTest.cpp -o %t/LFSIGUSR
Index: test/fuzzer/merge.test
===================================================================
--- test/fuzzer/merge.test
+++ test/fuzzer/merge.test
@@ -1,3 +1,4 @@
+XFAIL: ios
 CHECK: BINGO
 
 RUN: %cpp_compiler %S/FullCoverageSetTest.cpp -o %t-FullCoverageSetTest
Index: test/fuzzer/value-profile-div.test
===================================================================
--- test/fuzzer/value-profile-div.test
+++ test/fuzzer/value-profile-div.test
@@ -1,3 +1,4 @@
+XFAIL: ios
 CHECK: AddressSanitizer: {{FPE|int-divide-by-zero}}
 RUN: %cpp_compiler %S/DivTest.cpp -fsanitize-coverage=trace-div -o %t-DivTest
 RUN: not %run %t-DivTest -seed=1 -use_value_profile=1 -runs=10000000 2>&1 | FileCheck %s