fix #1246 (#1254)

* fix finding python path which only has python3.

* fix #1246, arm host issue.

* skip assembler tests on non-x86 host.

* update macro of dummy value.

* fix MSVC macro.

* update dummy array value macro.

* restore to original qemu code.

tests/unit/Makefile

@@ -7,6 +7,7 @@ ASFLAGS += --32
 OBJCOPY = objcopy
 
 UNAME_S := $(shell uname -s)
+UNAME_M := $(shell uname -m)
 LDLIBS += -pthread
 ifeq ($(UNAME_S), Linux)
 LDLIBS += -lrt
@@ -32,12 +33,16 @@ TEST_PROGS = $(TEST_ASSEMBLY:%.s=%.o)
 TEST_BINS = $(TEST_PROGS:%.o=%.bin)
 ALL_TESTS = $(ALL_TESTS_SOURCES:%.c=%)
 
+ifneq (,$(findstring x86,$(UNAME_M)))
+ALL_TESTS += $(TEST_BINS)
+endif
+
 .PHONY: all
-all: ${TEST_BINS} ${ALL_TESTS}
+all: ${ALL_TESTS}
 
 .PHONY: clean
 clean:
-	rm -rf ${TEST_BINS} ${ALL_TESTS}
+	rm -rf ${ALL_TESTS}
 
 %.bin: %.o
 	${OBJCOPY} -O binary $^ $@

tests/unit/test_mem_high.c

@@ -92,6 +92,9 @@ static void test_high_address_read_values(void **state)
     uc_engine *uc = *state;
     struct stat info;
     char * code = read_file("high_address.bin", &info);
+    if (code == NULL) {
+        return;
+    }
 
     uint64_t addr = 0x0010000000000001; 
     //addr = 0x000ffffffffffff8; // uncomment to fix wrong behaviour

tests/unit/test_pc_change.c

@@ -57,6 +57,9 @@ static void test_pc_change(void **state)
     int32_t r_ecx = 3, r_edx = 15;
     struct stat info;
     char *code = read_file("pc_change.bin", &info);
+    if (code == NULL) {
+        return;
+    }
 
 #define BASEADDR    0x1000000
 

tests/unit/unicorn_test.h

@@ -42,7 +42,14 @@ do {                                                                \
 char * read_file(const char *filename, struct stat *info) {
     stat(filename, info);
     char *code = malloc(info->st_size);
+    if (code == NULL) {
+        return NULL;
+    }
     FILE *fp = fopen(filename, "r");
+    if (fp == NULL) {
+        free(code);
+        return NULL;
+    }
     fread(code, info->st_size, 1, fp);
     return code;
 }