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final refactoring for test_hang

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This commit is contained in:
nuko32 2016-06-15 20:52:28 +02:00
parent 3bec4b2cf1
commit 9b46a22cd5
1 changed files with 16 additions and 3 deletions
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19
tests/unit/test_hang.c
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@ -39,7 +39,7 @@ static int teardown(void **state)
return 0;
}
void ayy(void **state)
void test_hang(void **state)
{
uint32_t code[] = {
0xd503201f, /* NOP */
@ -53,7 +53,20 @@ void ayy(void **state)
uint64_t x0 = 0;
uint64_t x1 = 1;
uint64_t addr = 0x13f0;
/*
* emulation will hang if some instruction hits every quarter of a page,
* i.e. these offsets:
* 0x1400, 0x1800, 0x1c00, 0x2000
*
* in this test, the code to be emulated is mapped just before the 0x1400
* offset, so that the final instruction emulated (MOV X0, X1) hits the offset,
* causing the hang.
* If you try to write the code just four bytes behind, the hang doesn't occur.
*
* So far, this strange behaviour has only been observed with AArch64 Unicorn APIs.
*/
uint64_t addr = 0x13f0; // try to map at (0x13f0 - 0x4) and the hang doesn't occur
uint64_t trunc_addr = trunc_page(addr); // round down to nearest page
uc_mem_map(uc, trunc_addr, 2 * 1024 * 1024, UC_PROT_ALL);
@ -81,7 +94,7 @@ void ayy(void **state)
int main(int argc, const char * argv[]) {
const struct CMUnitTest tests[] = {
cmocka_unit_test_setup_teardown(ayy, init, teardown),
cmocka_unit_test_setup_teardown(test_hang, init, teardown),
};
return cmocka_run_group_tests(tests, NULL, NULL);;