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https://github.com/yuzu-emu/unicorn.git
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1087ba9dea
Return the current page size used by the current arch. Useful to call uc_mem_map() with memory/size aligned. Signed-off-by: Nicolas PLANEL <nplanel@redhat.com>
237 lines
6 KiB
C
237 lines
6 KiB
C
/**
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* Unicorn memory API tests
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*
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* This tests memory read/write and map/unmap functionality.
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* One is necessary for doing the other.
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*/
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#include "unicorn_test.h"
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#include <stdio.h>
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#include <string.h>
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/* Called before every test to set up a new instance */
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static int setup(void **state)
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{
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uc_engine *uc;
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uc_assert_success(uc_open(UC_ARCH_X86, UC_MODE_32, &uc));
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*state = uc;
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return 0;
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}
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/* Called after every test to clean up */
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static int teardown(void **state)
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{
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uc_engine *uc = *state;
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uc_assert_success(uc_close(uc));
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*state = NULL;
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return 0;
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}
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/******************************************************************************/
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/**
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* A basic test showing mapping of memory, and reading/writing it
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*/
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static void test_basic(void **state)
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{
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uc_engine *uc = *state;
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const uint64_t mem_start = 0x1000;
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const uint64_t mem_len = 0x1000;
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const uint64_t test_addr = mem_start + 0x100;
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/* Map a region */
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uc_assert_success(uc_mem_map(uc, mem_start, mem_len, UC_PROT_NONE));
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/* Write some data to it */
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uc_assert_success(uc_mem_write(uc, test_addr, "test", 4));
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uint8_t buf[4];
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memset(buf, 0xCC, sizeof(buf));
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/* Read it back */
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uc_assert_success(uc_mem_read(uc, test_addr, buf, sizeof(buf)));
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/* And make sure it matches what we expect */
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assert_memory_equal(buf, "test", 4);
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/* Unmap the region */
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//uc_assert_success(uc_mem_unmap(uc, mem_start, mem_len));
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}
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static void test_bad_read(void **state)
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{
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uc_engine *uc = *state;
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uint8_t readbuf[0x10];
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memset(readbuf, 0xCC, sizeof(readbuf));
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uint8_t checkbuf[0x10];
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memset(checkbuf, 0xCC, sizeof(checkbuf));
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/* Reads to unmapped addresses should fail */
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/* TODO: Which error? */
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uc_assert_fail(uc_mem_read(uc, 0x1000, readbuf, sizeof(readbuf)));
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/* And our buffer should be unchanged */
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assert_memory_equal(readbuf, checkbuf, sizeof(checkbuf));
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}
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static void test_bad_write(void **state)
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{
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uc_engine *uc = *state;
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uint8_t writebuf[0x10];
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memset(writebuf, 0xCC, sizeof(writebuf));
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/* Writes to unmapped addresses should fail */
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/* TODO: Which error? */
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uc_assert_fail(uc_mem_write(uc, 0x1000, writebuf, sizeof(writebuf)));
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}
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/**
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* Verify that we can read/write across memory map region boundaries
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*/
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static void test_rw_across_boundaries(void **state)
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{
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uc_engine *uc = *state;
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/* Map in two adjacent regions */
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uc_assert_success(uc_mem_map(uc, 0, 0x1000, 0)); /* 0x0000 - 0x1000 */
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uc_assert_success(uc_mem_map(uc, 0x1000, 0x1000, 0)); /* 0x1000 - 0x2000 */
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const uint64_t addr = 0x1000 - 2; /* 2 bytes before end of block */
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/* Write some data across the boundary */
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uc_assert_success(uc_mem_write(uc, addr, "test", 4));
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uint8_t buf[4];
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memset(buf, 0xCC, sizeof(buf));
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/* Read the data across the boundary */
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uc_assert_success(uc_mem_read(uc, addr, buf, sizeof(buf)));
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assert_memory_equal(buf, "test", 4);
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}
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/* Try to unmap memory that has not been mapped */
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static void test_bad_unmap(void **state)
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{
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uc_engine *uc = *state;
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/* TODO: Which error should this return? */
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uc_assert_fail(uc_mem_unmap(uc, 0x0, 0x1000));
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}
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/* Try to map overlapped memory range */
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static void test_unmap_double_map(void **state)
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{
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uc_engine *uc = *state;
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uc_assert_success(uc_mem_map(uc, 0, 0x4000, 0)); /* 0x0000 - 0x4000 */
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uc_assert_fail(uc_mem_map(uc, 0x0000, 0x1000, 0)); /* 0x1000 - 0x1000 */
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}
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static void test_overlap_unmap_double_map(void **state)
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{
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uc_engine *uc = *state;
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uc_mem_map( uc, 0x1000, 0x2000, 0);
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uc_mem_map( uc, 0x1000, 0x1000, 0);
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uc_mem_unmap(uc, 0x2000, 0x1000);
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}
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static void test_strange_map(void **state)
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{
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uc_engine *uc = *state;
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uc_mem_map( uc, 0x0,0x3000,0);
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uc_mem_unmap(uc, 0x1000,0x1000);
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uc_mem_map( uc, 0x3000,0x1000,0);
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uc_mem_map( uc, 0x4000,0x1000,0);
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uc_mem_map( uc, 0x1000,0x1000,0);
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uc_mem_map( uc, 0x5000,0x1000,0);
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uc_mem_unmap(uc, 0x0,0x1000);
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}
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static void test_query_page_size(void **state)
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{
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uc_engine *uc = *state;
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size_t page_size;
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uc_assert_success(uc_query(uc, UC_QUERY_PAGE_SIZE, &page_size));
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assert_int_equal(4096, page_size);
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}
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void write(uc_engine* uc, uint64_t addr, uint64_t len){
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uint8_t* buff = alloca(len);
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memset(buff,0,len);
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uc_mem_write(uc, addr, buff, len);
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}
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void read(uc_engine* uc, uint64_t addr, uint64_t len){
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uint8_t* buff = alloca(len);
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uc_mem_read(uc, addr, buff, len);
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}
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void map(uc_engine* uc, uint64_t addr, uint64_t len){
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uc_mem_map(uc, addr, len, UC_PROT_READ | UC_PROT_WRITE);
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}
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void unmap(uc_engine* uc, uint64_t addr, uint64_t len){
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uc_mem_unmap(uc, addr, len);
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}
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//most likely same bug as in test_strange_map, but looked different in fuzzer (sefault instead of assertion fail)
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static void test_assertion_fail(void **state){
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uc_engine *uc = *state;
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map(uc,0x2000,0x4000); //5
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unmap(uc,0x3000,0x2000); //11
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map(uc,0x0,0x2000); //23
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map(uc,0x3000,0x2000); //24
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map(uc,0x9000,0x4000); //32
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map(uc,0x8000,0x1000); //34
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unmap(uc,0x1000,0x4000); //35
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}
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static void test_bad_offset(void **state){
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uc_engine *uc = *state;
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map(uc,0x9000,0x4000); //17
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map(uc,0x4000,0x2000); //32
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unmap(uc,0x5000,0x1000); //35
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map(uc,0x0,0x1000); //42
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map(uc,0x5000,0x4000); //51
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map(uc,0x2000,0x1000); //53
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map(uc,0x1000,0x1000); //55
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unmap(uc,0x7000,0x3000); //58
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unmap(uc,0x5000,0x1000); //59
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unmap(uc,0x4000,0x2000); //70
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}
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int main(void) {
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#define test(x) cmocka_unit_test_setup_teardown(x, setup, teardown)
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const struct CMUnitTest tests[] = {
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test(test_basic),
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//test(test_bad_read),
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//test(test_bad_write),
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test(test_bad_offset),
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test(test_assertion_fail),
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test(test_bad_unmap),
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test(test_rw_across_boundaries),
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test(test_unmap_double_map),
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test(test_overlap_unmap_double_map),
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test(test_strange_map),
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test(test_query_page_size),
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};
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#undef test
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return cmocka_run_group_tests(tests, NULL, NULL);
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}
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