1 // RUN: %clangxx %collect_stack_traces -O0 %s -o %t 2 // RUN: %env_tool_opts=allocator_may_return_null=0 not %run %t m1 2>&1 | FileCheck %s 3 // RUN: %env_tool_opts=allocator_may_return_null=1 %run %t m1 2>&1 | FileCheck %s --check-prefix=CHECK-NULL 4 // RUN: %env_tool_opts=allocator_may_return_null=0 not %run %t psm1 2>&1 | FileCheck %s 5 // RUN: %env_tool_opts=allocator_may_return_null=1 %run %t psm1 2>&1 | FileCheck %s --check-prefix=CHECK-NULL 6 7 // REQUIRES: stable-runtime 8 9 // UNSUPPORTED: android, freebsd, netbsd, ubsan 10 11 // Checks that pvalloc overflows are caught. If the allocator is allowed to 12 // 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 22 int 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)0 42 // is always the same. 43 fprintf(stderr, "errno: %d, p: %lx\n", errno, (long)p); 44 // CHECK-NULL: errno: 12, p: 0 45 46 return 0; 47 } 48