712fc9803a
Summary: This is an initial implementation of a Hardened Allocator based on Sanitizer Common's CombinedAllocator. It aims at mitigating heap based vulnerabilities by adding several features to the base allocator, while staying relatively fast. The following were implemented: - additional consistency checks on the allocation function parameters and on the heap chunks; - use of checksum protected chunk header, to detect corruption; - randomness to the allocator base; - delayed freelist (quarantine), to mitigate use after free and overall determinism. Additional mitigations are in the works. Reviewers: eugenis, aizatsky, pcc, krasin, vitalybuka, glider, dvyukov, kcc Subscribers: kubabrecka, filcab, llvm-commits Differential Revision: http://reviews.llvm.org/D20084 llvm-svn: 271968
39 lines
710 B
C++
39 lines
710 B
C++
// RUN: %clang_scudo %s -o %t
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// RUN: %run %t 2>&1
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// Verifies that calling malloc in a preinit_array function succeeds, and that
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// the resulting pointer can be freed at program termination.
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#include <malloc.h>
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#include <stdlib.h>
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#include <string.h>
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static void *global_p = nullptr;
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void __init(void) {
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global_p = malloc(1);
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if (!global_p)
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exit(1);
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}
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void __fini(void) {
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if (global_p)
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free(global_p);
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}
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int main(int argc, char **argv)
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{
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void *p = malloc(1);
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if (!p)
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return 1;
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free(p);
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return 0;
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}
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__attribute__((section(".preinit_array"), used))
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void (*__local_preinit)(void) = __init;
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__attribute__((section(".fini_array"), used))
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void (*__local_fini)(void) = __fini;
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