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Issue #465 hook_count_cb doesn't stop at n instructions; unit test file

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Egbert 2015-10-03 22:46:25 -07:00
parent 7cb8e889ad
commit dbdc2b3715
2 changed files with 201 additions and 1 deletions
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5
tests/unit/Makefile
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@ -5,7 +5,8 @@ CFLAGS += -lcmocka -lunicorn
CFLAGS += -I ../../include
ALL_TESTS = test_sanity test_x86 test_mem_map test_mem_high test_mem_map_ptr \
test_tb_x86 test_multihook test_pc_change test_x86_soft_paging
test_tb_x86 test_multihook test_pc_change test_x86_soft_paging \
test_hookcounts
.PHONY: all
all: ${ALL_TESTS}
@ -26,6 +27,7 @@ test: ${ALL_TESTS}
./test_multihook
./test_pc_change
./test_x86_soft_paging
./test_hookcounts
test_sanity: test_sanity.c
test_x86: test_x86.c
@ -36,6 +38,7 @@ test_tb_x86: test_tb_x86.c
test_multihook: test_multihook.c
test_pc_change: test_pc_change.c
test_x86_soft_paging: test_x86_soft_paging.c
test_hookcounts: test_hookcounts.c
${ALL_TESTS}:
${CC} ${CFLAGS} -o $@ $^

197
tests/unit/test_hookcounts.c Normal file
View file

@ -0,0 +1,197 @@
// Test hook evocation count
//
// Objective is to demonstrate finer duration control of
// emulation by counts of instruction code
//
#include "unicorn_test.h"
#include <inttypes.h>
#define OK(x) uc_assert_success(x)
volatile int expected_instructions = 0;
volatile int total_instructions = 0;
// NOTE: It would appear that this UC_HOOK_CODE is being done before the
// uc_count_fb hook.
// So, termination by uc->emu_count has not been done yet here...
static void test_code_hook(uc_engine *uc,
uint64_t address,
uint32_t size,
void *user_data)
{
++total_instructions;
if (total_instructions > expected_instructions)
{
uc_emu_stop(uc);
}
#ifdef DEBUG
printf("instruction at 0x%"PRIx64": ", address);
if (!uc_mem_read(uc, address, tmp, size)) {
uint8_t tmp[256];
uint32_t i;
for (i = 0; i < size; i++) {
printf("0x%x ", tmp[i]);
}
printf("\n");
}
#endif // DEBUG
}
/* Called before every test to set up a new instance */
static int setup32(void **state)
{
uc_hook trace1;
uc_engine *uc;
OK(uc_open(UC_ARCH_X86, UC_MODE_32, &uc));
*state = uc;
// trace all instructions
OK(uc_hook_add(uc, &trace1, UC_HOOK_CODE, test_code_hook, NULL, 1, 0));
return 0;
}
/* Called after every test to clean up */
static int teardown(void **state)
{
uc_engine *uc = *state;
OK(uc_close(uc));
*state = NULL;
return 0;
}
/******************************************************************************/
static void
test_hook_count(uc_engine *uc,
const uint8_t *code,
int start_offset,
int expected_instructions)
{
#define BASEADDR 0x1000000
#define MEMSIZE (2 * 1024 * 1024)
uint64_t address = BASEADDR + (expected_instructions * MEMSIZE);
total_instructions = 0;
#undef BASEADDR
// map a new 2MB memory for this emulation
OK(uc_mem_map(uc, address, MEMSIZE, UC_PROT_ALL));
// write machine code to be emulated to memory
OK(uc_mem_write(uc, address, code, expected_instructions));
OK(uc_emu_start(uc,
address,
address+start_offset,
0,
expected_instructions));
assert_int_equal(expected_instructions, total_instructions);
// map 2MB memory for this emulation
OK(uc_mem_unmap(uc, address, MEMSIZE));
}
/* Perform fine-grain emulation control of exactly 1 instruction */
static void test_hook_count_1(void **state)
{
uc_engine *uc = *state;
const uint8_t code[] = {
0x41, // inc ECX @0x1000000
0x41, // inc ECX
0x41, // inc ECX
0x41, // inc ECX @0x1000003
0x41, // inc ECX
0x41, // inc ECX
0x42, // inc EDX @0x1000006
0x42, // inc EDX
};
test_hook_count(uc, code, 0, 1);
}
/* Perform fine-grain emulation control over a range of */
/* varied instruction steps. */
static void test_hook_count_range(void **state)
{
int i;
uc_engine *uc = *state;
const uint8_t code[] = {
0x41, // inc ECX @0x1000000
0x41, // inc ECX
0x41, // inc ECX
0x41, // inc ECX @0x1000003
0x41, // inc ECX
0x41, // inc ECX
0x42, // inc EDX @0x1000006
0x42, // inc EDX
};
for (i = 2; i < 7; i++)
{
test_hook_count(uc, code, 1, i);
}
}
static void test_hook_count_end(void **state)
{
uc_engine *uc = *state;
const uint8_t code[] = {
0x41, // inc ECX @0x1000000
0x41, // inc ECX
0x41, // inc ECX
0x41, // inc ECX @0x1000003
0x41, // inc ECX
0x41, // inc ECX
0x42, // inc EDX @0x1000006
0x42, // inc EDX
};
test_hook_count(uc, code, sizeof(code)-1, 1);
}
static void test_hook_count_midpoint(void **state)
{
uc_engine *uc = *state;
const uint8_t code[] = {
0x41, // inc ECX @0x1000000
0x41, // inc ECX
0x41, // inc ECX
0x41, // inc ECX @0x1000003
0x41, // inc ECX
0x41, // inc ECX
0x42, // inc EDX @0x1000006
0x42, // inc EDX
};
test_hook_count(uc, code, sizeof(code)/2, 2);
test_hook_count(uc, code, 2, sizeof(code)-2);
}
int main(void)
{
const struct CMUnitTest tests[] = {
cmocka_unit_test_setup_teardown(test_hook_count_1, setup32, teardown),
cmocka_unit_test_setup_teardown(test_hook_count_range, setup32, teardown),
cmocka_unit_test_setup_teardown(test_hook_count_midpoint, setup32, teardown),
cmocka_unit_test_setup_teardown(test_hook_count_end, setup32, teardown),
};
return cmocka_run_group_tests(tests, NULL, NULL);
}