43 lines · c
1// RUN: %clang_msan -fsanitize-memory-track-origins=0 -O0 %s -o %t && env MSAN_OPTIONS=soft_rss_limit_mb=18:verbosity=1:allocator_may_return_null=1 %run %t 2>&1 | FileCheck %s -implicit-check-not="soft rss limit" -check-prefixes=CHECK,NOORIG2// RUN: %clang_msan -fsanitize-memory-track-origins=2 -O0 %s -o %t && env MSAN_OPTIONS=soft_rss_limit_mb=36:verbosity=1:allocator_may_return_null=1 %run %t 2>&1 | FileCheck %s -implicit-check-not="soft rss limit" -check-prefixes=CHECK,ORIGIN3 4#include <assert.h>5#include <sanitizer/allocator_interface.h>6#include <stdio.h>7#include <stdlib.h>8#include <string.h>9#include <unistd.h>10 11void *p;12 13int main(int argc, char **argv) {14 int s = 20 * 1024 * 1024;15 fprintf(stderr, "malloc\n");16 p = malloc(s);17 sleep(1);18 fprintf(stderr, "memset\n");19 memset(p, 1, s);20 sleep(1);21 fprintf(stderr, "free\n");22 free(p);23 sleep(1);24 return 0;25}26 27// CHECK-LABEL: malloc28 29// Non origin mode allocate ~20M for shadow.30// Origin mode allocate ~20M for shadow and ~20M for origin.31// CHECK: soft rss limit exhausted32 33// CHECK-LABEL: memset34 35// Memset reserve modified pages, frees ~20M for shadow. So not change in RSS for non-origin mode.36// Origin mode also frees ~20M of origins, so 'unexhausted'.37// ORIGIN: soft rss limit unexhausted38 39// CHECK-LABEL: free40 41// Now non-origin release all everything.42// NOORIG: soft rss limit unexhausted43