8d6257b4bf
Summary: The local and global quarantine sizes were not offering a distinction for 32-bit and 64-bit platforms. This is addressed with lower values for 32-bit. When writing additional tests for the quarantine, it was discovered that when calling some of the allocator interface function prior to any allocation operation having occured, the test would crash due to the allocator not being initialized. This was addressed by making sure the allocator is initialized for those scenarios. Relevant tests were added in interface.cpp and quarantine.cpp. Last change being the removal of the extraneous link dependencies for the tests thanks to rL293220, anf the addition of the gc-sections linker flag. Reviewers: kcc, alekseyshl Reviewed By: alekseyshl Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D29341 llvm-svn: 294037
54 lines
1.4 KiB
C++
54 lines
1.4 KiB
C++
// RUN: %clang_scudo %s -o %t
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// RUN: %run %t after 2>&1 | FileCheck %s
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// RUN: %run %t before 2>&1 | FileCheck %s
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// Test that we hit a guard page when writing past the end of a chunk
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// allocated by the Secondary allocator, or writing too far in front of it.
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#include <assert.h>
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#include <malloc.h>
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#include <signal.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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void handler(int signo, siginfo_t *info, void *uctx) {
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if (info->si_code == SEGV_ACCERR) {
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fprintf(stderr, "SCUDO SIGSEGV\n");
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exit(0);
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}
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exit(1);
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}
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int main(int argc, char **argv)
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{
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// The size must be large enough to be serviced by the secondary allocator.
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long page_size = sysconf(_SC_PAGESIZE);
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size_t size = (1U << 17) + page_size;
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struct sigaction a;
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assert(argc == 2);
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memset(&a, 0, sizeof(a));
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a.sa_sigaction = handler;
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a.sa_flags = SA_SIGINFO;
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char *p = (char *)malloc(size);
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assert(p);
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memset(p, 'A', size); // This should not trigger anything.
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// Set up the SIGSEGV handler now, as the rest should trigger an AV.
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sigaction(SIGSEGV, &a, nullptr);
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if (!strcmp(argv[1], "after")) {
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for (int i = 0; i < page_size; i++)
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p[size + i] = 'A';
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}
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if (!strcmp(argv[1], "before")) {
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for (int i = 1; i < page_size; i++)
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p[-i] = 'A';
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}
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free(p);
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return 1; // A successful test means we shouldn't reach this.
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}
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// CHECK: SCUDO SIGSEGV
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