91244924cb
Summary: This commit adds symbolize_vs_style=false to every instance of ASAN_OPTIONS in the asan tests and sets ASAN_OPTIONS=symbolize_vs_style=false in lit, for tests which don't set it. This way we don't need to make the tests be able to deal with both symbolize styles. This is the first patch in the series. I will eventually submit for the other sanitizers too. We need this change (or another way to deal with the different outputs) in order to be able to default to symbolize_vs_style=true on some platforms. Adding to this change, I'm also adding "env " before any command line which sets environment variables. That way the test works on other host shells, like we have if the host is running Windows. Reviewers: samsonov, kcc, rnk Subscribers: tberghammer, llvm-commits Differential Revision: http://reviews.llvm.org/D10294 llvm-svn: 239754
65 lines
1.7 KiB
C++
65 lines
1.7 KiB
C++
// Test ASan detection of stack-overflow condition when Linux sends SIGBUS.
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// RUN: %clangxx_asan -O0 %s -o %t && env ASAN_OPTIONS=$ASAN_OPTIONS:use_sigaltstack=1 not %run %t 2>&1 | FileCheck %s
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#include <assert.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/mman.h>
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#include <sys/resource.h>
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const int BS = 1024;
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volatile char x;
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volatile int y = 1;
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void recursive_func(char *p) {
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char buf[BS];
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buf[rand() % BS] = 1;
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buf[rand() % BS] = 2;
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x = buf[rand() % BS];
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if (y)
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recursive_func(buf);
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x = 1; // prevent tail call optimization
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// CHECK: {{stack-overflow on address 0x.* \(pc 0x.* bp 0x.* sp 0x.* T.*\)}}
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}
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void LimitStackAndReexec(int argc, char **argv) {
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struct rlimit rlim;
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int res = getrlimit(RLIMIT_STACK, &rlim);
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assert(res == 0);
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if (rlim.rlim_cur == RLIM_INFINITY) {
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rlim.rlim_cur = 256 * 1024;
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res = setrlimit(RLIMIT_STACK, &rlim);
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assert(res == 0);
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execv(argv[0], argv);
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assert(0 && "unreachable");
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}
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}
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int main(int argc, char **argv) {
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LimitStackAndReexec(argc, argv);
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// Map some memory just before the start of the current stack vma.
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// When the stack grows down and crashes into it, Linux can send
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// SIGBUS instead of SIGSEGV. See:
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// http://lkml.iu.edu/hypermail/linux/kernel/1008.1/02299.html
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const long pagesize = sysconf(_SC_PAGESIZE);
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FILE *f = fopen("/proc/self/maps", "r");
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char a[1000];
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void *p = 0;
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while (fgets(a, sizeof a, f)) {
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if (strstr(a, "[stack]")) {
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unsigned long addr;
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if (sscanf(a, "%lx", &addr) == 1)
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p = mmap((void *)(addr - 4 * pagesize), pagesize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
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}
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}
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assert(p);
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recursive_func(0);
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return 0;
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}
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