fd9f7b9010
The effectiveness of the mprotect function depends on whether the first argument is aligned to a page boundary. If mprotect doesn't work, the kernel will not generate a SIGSEGV signal for the process when the calling process tries to access memory in a manner that violates the protection. If so, this test fails. The problem for this test is that it uses a fixed 4 kB page size and is aligned. This fails when the page size is not 4 kB. For example, this fails on LoongArch which uses a 16 kB pagesize. Reviewed By: SixWeining, xen0n, MaskRay, vitalybuka Differential Revision: https://reviews.llvm.org/D148407
28 lines
882 B
C++
28 lines
882 B
C++
// Test that SIGSEGV during leak checking does not crash the process.
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// RUN: %clangxx_lsan -O1 %s -o %t && not %run %t 2>&1 | FileCheck %s
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// UNSUPPORTED: ppc
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#include <sanitizer/lsan_interface.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/mman.h>
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#include <unistd.h>
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char data[10 * 1024 * 1024];
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int main() {
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long pagesize_mask = sysconf(_SC_PAGESIZE) - 1;
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void *p = malloc(10 * 1024 * 1024);
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// surprise-surprise!
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mprotect((void *)(((unsigned long)p + pagesize_mask) & ~pagesize_mask),
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16 * 1024, PROT_NONE);
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mprotect((void *)(((unsigned long)data + pagesize_mask) & ~pagesize_mask),
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16 * 1024, PROT_NONE);
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__lsan_do_leak_check();
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fprintf(stderr, "DONE\n");
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}
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// CHECK: Tracer caught signal 11
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// CHECK: LeakSanitizer has encountered a fatal error
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// CHECK: HINT: For debugging, try setting {{.*}} LSAN_OPTIONS
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// CHECK-NOT: DONE
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