1 // RUN: %clang_esan_wset -O0 %s -o %t 2>&1 2 // RUN: %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-ESAN 3 4 // RUN: %clang -O0 %s -o %t 2>&1 5 // RUN: %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-NO-ESAN 6 7 #include <sanitizer/esan_interface.h> 8 #include <sched.h> 9 #include <stdio.h> 10 #include <stdlib.h> 11 #include <string.h> 12 #include <sys/mman.h> 13 14 const int size = 0x1 << 25; // 523288 cache lines 15 const int iters = 6; 16 17 int main(int argc, char **argv) { 18 char *buf = (char *)mmap(0, size, PROT_READ | PROT_WRITE, 19 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); 20 // Try to increase the probability that the sideline thread is 21 // scheduled. Unfortunately we can't do proper synchronization 22 // without some form of annotation or something. 23 sched_yield(); 24 // Do enough work to get at least 4 samples. 25 for (int j = 0; j < iters; ++j) { 26 for (int i = 0; i < size; ++i) 27 buf[i] = i; 28 sched_yield(); 29 } 30 // Ensure a non-esan build works without ifdefs: 31 if (__esan_report) { 32 // We should get 2 roughly identical reports: 33 __esan_report(); 34 } 35 munmap(buf, size); 36 fprintf(stderr, "all done\n"); 37 // CHECK-NO-ESAN: all done 38 // We only check for a few samples here to reduce the chance of flakiness: 39 // CHECK-ESAN: =={{[0-9]+}}== Total number of samples: {{[0-9]+}} 40 // CHECK-ESAN-NEXT: =={{[0-9]+}}== Samples array #0 at period 20 ms 41 // CHECK-ESAN-NEXT: =={{[0-9]+}}==# 0: {{[ 0-9]+}} {{KB|MB|Bytes}} ({{[ 0-9]+}} cache lines) 42 // CHECK-ESAN-NEXT: =={{[0-9]+}}==# 1: {{[ 0-9]+}} {{KB|MB|Bytes}} ({{[ 0-9]+}} cache lines) 43 // CHECK-ESAN-NEXT: =={{[0-9]+}}==# 2: {{[ 0-9]+}} {{KB|MB|Bytes}} ({{[ 0-9]+}} cache lines) 44 // CHECK-ESAN-NEXT: =={{[0-9]+}}==# 3: {{[ 0-9]+}} {{KB|MB|Bytes}} ({{[ 0-9]+}} cache lines) 45 // CHECK-ESAN: =={{[0-9]+}}== Samples array #1 at period 80 ms 46 // CHECK-ESAN-NEXT: =={{[0-9]+}}==# 0: {{[ 0-9]+}} {{KB|MB|Bytes}} ({{[ 0-9]+}} cache lines) 47 // CHECK-ESAN: =={{[0-9]+}}== Samples array #2 at period 320 ms 48 // CHECK-ESAN: =={{[0-9]+}}== Samples array #3 at period 1280 ms 49 // CHECK-ESAN: =={{[0-9]+}}== Samples array #4 at period 5120 ms 50 // CHECK-ESAN: =={{[0-9]+}}== Samples array #5 at period 20 sec 51 // CHECK-ESAN: =={{[0-9]+}}== Samples array #6 at period 81 sec 52 // CHECK-ESAN: =={{[0-9]+}}== Samples array #7 at period 327 sec 53 // CHECK-ESAN: {{.*}} EfficiencySanitizer: the total working set size: 32 MB (5242{{[0-9][0-9]}} cache lines) 54 // CHECK-ESAN-NEXT: all done 55 // CHECK-ESAN-NEXT: =={{[0-9]+}}== Total number of samples: {{[0-9]+}} 56 // CHECK-ESAN-NEXT: =={{[0-9]+}}== Samples array #0 at period 20 ms 57 // CHECK-ESAN-NEXT: =={{[0-9]+}}==# 0: {{[ 0-9]+}} {{KB|MB|Bytes}} ({{[ 0-9]+}} cache lines) 58 // CHECK-ESAN-NEXT: =={{[0-9]+}}==# 1: {{[ 0-9]+}} {{KB|MB|Bytes}} ({{[ 0-9]+}} cache lines) 59 // CHECK-ESAN-NEXT: =={{[0-9]+}}==# 2: {{[ 0-9]+}} {{KB|MB|Bytes}} ({{[ 0-9]+}} cache lines) 60 // CHECK-ESAN-NEXT: =={{[0-9]+}}==# 3: {{[ 0-9]+}} {{KB|MB|Bytes}} ({{[ 0-9]+}} cache lines) 61 // CHECK-ESAN: =={{[0-9]+}}== Samples array #1 at period 80 ms 62 // CHECK-ESAN-NEXT: =={{[0-9]+}}==# 0: {{[ 0-9]+}} {{KB|MB|Bytes}} ({{[ 0-9]+}} cache lines) 63 // CHECK-ESAN: =={{[0-9]+}}== Samples array #2 at period 320 ms 64 // CHECK-ESAN: =={{[0-9]+}}== Samples array #3 at period 1280 ms 65 // CHECK-ESAN: =={{[0-9]+}}== Samples array #4 at period 5120 ms 66 // CHECK-ESAN: =={{[0-9]+}}== Samples array #5 at period 20 sec 67 // CHECK-ESAN: =={{[0-9]+}}== Samples array #6 at period 81 sec 68 // CHECK-ESAN: =={{[0-9]+}}== Samples array #7 at period 327 sec 69 // CHECK-ESAN: {{.*}} EfficiencySanitizer: the total working set size: 32 MB (5242{{[0-9][0-9]}} cache lines) 70 return 0; 71 } 72
