48 lines · cpp
1// RUN: %clangxx %collect_stack_traces -O0 %s -o %t2// RUN: %env_tool_opts=allocator_may_return_null=0 not %run %t m1 2>&1 | FileCheck %s3// RUN: %env_tool_opts=allocator_may_return_null=1 %run %t m1 2>&1 | FileCheck %s --check-prefix=CHECK-NULL4// RUN: %env_tool_opts=allocator_may_return_null=0 not %run %t psm1 2>&1 | FileCheck %s5// RUN: %env_tool_opts=allocator_may_return_null=1 %run %t psm1 2>&1 | FileCheck %s --check-prefix=CHECK-NULL6 7// REQUIRES: stable-runtime8 9// UNSUPPORTED: android, target={{.*(freebsd|netbsd).*}}, ubsan10 11// Checks that pvalloc overflows are caught. If the allocator is allowed to12// return null, the errno should be set to ENOMEM.13 14#include <assert.h>15#include <errno.h>16#include <malloc.h>17#include <stdio.h>18#include <stdint.h>19#include <string.h>20#include <unistd.h>21 22int main(int argc, char *argv[]) {23 assert(argc == 2);24 const char *action = argv[1];25 26 const size_t page_size = sysconf(_SC_PAGESIZE);27 28 void *p = nullptr;29 if (!strcmp(action, "m1")) {30 p = pvalloc((uintptr_t)-1);31 } else if (!strcmp(action, "psm1")) {32 p = pvalloc((uintptr_t)-(page_size - 1));33 } else {34 assert(0);35 }36 // CHECK: {{ERROR: .*Sanitizer: pvalloc parameters overflow: size .* rounded up to system page size .* cannot be represented in type size_t}}37 // CHECK: {{#0 .*pvalloc}}38 // CHECK: {{#[12] .*main .*pvalloc-overflow.cpp:}}39 // CHECK: {{SUMMARY: .*Sanitizer: pvalloc-overflow}}40 41 // The NULL pointer is printed differently on different systems, while (long)042 // is always the same.43 fprintf(stderr, "errno: %d, p: %lx\n", errno, (long)p);44 // CHECK-NULL: errno: 12, p: 045 46 return 0;47}48