Threads and sanitizers are broken on kernel >=v6.6.

- google/sanitizers#1716

test.h

@@ -40,7 +40,7 @@
   do {                                                                     \
     char buf__[BUFSIZ];                                                    \
     ptrdiff_t len__ = snprintf(buf__, BUFSIZ, "%s" fmt "%s\n", clr, KNRM); \
-    write((fd), buf__, len__);                                             \
+    assert(len__ == write((fd), buf__, len__));                            \
   } while (0)
 
 #define suite() pr(STDOUT_FILENO, "Suite: " __FILE__, KCYN)

test/Makefile

@@ -8,20 +8,19 @@ DELIM = echo "~~"
 ASAN = -fsanitize=address
 UBSAN = -fsanitize=undefined
 TSAN = -fsanitize=thread
-CFLAGS = -std=$(STD) -Wall -Wextra -Wconversion -Wno-sign-conversion -Wdouble-promotion -Wcast-qual -Wvla -Werror -pedantic -O0 -g3 -DNCOLOR=$(NCOLOR) -fpie
-LDFLAGS = -Wl,-pie
+CFLAGS = -std=$(STD) -Wall -Wextra -Wconversion -Wno-sign-conversion -Wdouble-promotion -Wcast-qual -Wvla -Werror -pedantic -O0 -g3 -DNCOLOR=$(NCOLOR)
 
-check: test_arena test_spinlock test_msi
+check: test_arena test_msi
 
 test_arena: arena
 	@$(DELIM)
 	@./arena
 	@$(DELIM)
 
 arena: arena.c .force
-	$(CC) -o $@ $(CFLAGS) $(ASAN) $(UBSAN) $< $(LDFLAGS)
+	$(CC) -o $@ $(CFLAGS) $(ASAN) $(UBSAN) $<
 
-test_spinlock: spinlock_tsan spinlock_asan
+test_spinlock: spinlock_asan
 	@$(DELIM)
 	@echo "[Under TSan]"
 	@./spinlock_tsan
@@ -30,15 +29,15 @@ test_spinlock: spinlock_tsan spinlock_asan
 	@$(DELIM)
 
 spinlock_tsan: spinlock.c .force
-	$(CC) -o $@ $(CFLAGS) $(TSAN) $< $(LDFLAGS) -lpthread
+	$(CC) -o $@ $(CFLAGS) $(TSAN) $< -lpthread
 
 spinlock_asan: spinlock.c .force
-	$(CC) -o $@ $(CFLAGS) $(ASAN) $(UBSAN) $< $(LDFLAGS) -lpthread
+	$(CC) -o $@ $(CFLAGS) $(ASAN) $(UBSAN) $< -lpthread
 
 test_msi: msi
 	@$(DELIM)
 	@./msi
 	@$(DELIM)
 
 msi: msi.c .force
-	$(CC) -o $@ $(CFLAGS) $(ASAN) $(UBSAN) $< $(LDFLAGS)
+	$(CC) -o $@ $(CFLAGS) $(ASAN) $(UBSAN) $<