d937b0a10c
Summary: Initially, Scudo had a monolithic design where both C and C++ functions were living in the same library. This was not necessarily ideal, and with the work on -fsanitize=scudo, it became more apparent that this needed to change. We are splitting the new/delete interceptor in their own C++ library. This allows more flexibility, notably with regard to std::bad_alloc when the work is done. This also allows us to not link new & delete when using pure C. Additionally, we add the UBSan runtimes with Scudo, in order to be able to have a -fsanitize=scudo,undefined in Clang (see work in D39334). The changes in this patch: - split the cxx specific code in the scudo cmake file into a new library; (remove the spurious foreach loop, that was not necessary) - add the UBSan runtimes (both C and C++); - change the test cmake file to allow for specific C & C++ tests; - make C tests pure C, rename their extension accordingly. Reviewers: alekseyshl Reviewed By: alekseyshl Subscribers: srhines, mgorny, llvm-commits Differential Revision: https://reviews.llvm.org/D39461 llvm-svn: 317097
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, NULL);
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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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