Last active
October 3, 2022 01:34
-
-
Save jacky860226/cbd6d9d0d4e36a48aa3487d4bf578071 to your computer and use it in GitHub Desktop.
ICPC Judge Test
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
#include <bits/stdc++.h> | |
using namespace std; | |
namespace system_test { | |
const size_t KB = 1024; | |
const size_t MB = KB * 1024; | |
const size_t GB = MB * 1024; | |
size_t block_size, bound; | |
void stack_size_dfs(size_t depth = 1) { | |
if (depth >= bound) | |
return; | |
int8_t ptr[block_size]; // 若無法編譯將 block_size 改成常數 | |
memset(ptr, 'a', block_size); | |
cout << depth << endl; | |
stack_size_dfs(depth + 1); | |
} | |
void stack_size_and_runtime_error(size_t block_size, size_t bound = 1024) { | |
system_test::block_size = block_size; | |
system_test::bound = bound; | |
stack_size_dfs(); | |
} | |
double speed(int iter_num) { | |
const int block_size = 1024; | |
volatile int A[block_size]; | |
auto begin = chrono::high_resolution_clock::now(); | |
while (iter_num--) | |
for (int j = 0; j < block_size; ++j) | |
A[j] += j; | |
auto end = chrono::high_resolution_clock::now(); | |
chrono::duration<double> diff = end - begin; | |
return diff.count(); | |
} | |
void runtime_error_1() { | |
// Segmentation fault | |
int *ptr = nullptr; | |
*(ptr + 7122) = 7122; | |
} | |
void runtime_error_2() { | |
// Segmentation fault | |
int *ptr = (int *)memset; | |
*ptr = 7122; | |
} | |
void runtime_error_3() { | |
// munmap_chunk(): invalid pointer | |
int *ptr = (int *)memset; | |
delete ptr; | |
} | |
void runtime_error_4() { | |
// free(): invalid pointer | |
int *ptr = new int[7122]; | |
ptr += 1; | |
delete[] ptr; | |
} | |
void runtime_error_5() { | |
// maybe illegal instruction | |
int a = 7122, b = 0; | |
cout << (a / b) << endl; | |
} | |
void runtime_error_6() { | |
// floating point exception | |
volatile int a = 7122, b = 0; | |
cout << (a / b) << endl; | |
} | |
void runtime_error_7() { | |
// call to abort. | |
assert(false); | |
} | |
} // namespace system_test | |
#include <sys/resource.h> | |
void print_stack_limit() { // only work in Linux | |
struct rlimit l; | |
getrlimit(RLIMIT_STACK, &l); | |
cout << "stack_size = " << l.rlim_cur << " byte" << endl; | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment