[scudo] Implement stricter separation of C vs C++
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
2017-11-01 23:28:20 +08:00
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// RUN: %clangxx_scudo -fsized-deallocation %s -o %t
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2017-09-18 23:40:53 +08:00
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// RUN: %env_scudo_opts=DeleteSizeMismatch=1 %run %t gooddel 2>&1
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// RUN: %env_scudo_opts=DeleteSizeMismatch=1 not %run %t baddel 2>&1 | FileCheck %s
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// RUN: %env_scudo_opts=DeleteSizeMismatch=0 %run %t baddel 2>&1
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// RUN: %env_scudo_opts=DeleteSizeMismatch=1 %run %t gooddelarr 2>&1
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// RUN: %env_scudo_opts=DeleteSizeMismatch=1 not %run %t baddelarr 2>&1 | FileCheck %s
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// RUN: %env_scudo_opts=DeleteSizeMismatch=0 %run %t baddelarr 2>&1
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[sanitizer] Initial implementation of a Hardened Allocator
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
2016-06-07 09:20:26 +08:00
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// Ensures that the sized delete operator errors out when the appropriate
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// option is passed and the sizes do not match between allocation and
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// deallocation functions.
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#include <assert.h>
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#include <stdlib.h>
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#include <string.h>
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2017-02-04 04:49:42 +08:00
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#include <new>
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[sanitizer] Initial implementation of a Hardened Allocator
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
2016-06-07 09:20:26 +08:00
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int main(int argc, char **argv)
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{
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assert(argc == 2);
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if (!strcmp(argv[1], "gooddel")) {
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long long *p = new long long;
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operator delete(p, sizeof(long long));
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}
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if (!strcmp(argv[1], "baddel")) {
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long long *p = new long long;
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operator delete(p, 2);
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}
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if (!strcmp(argv[1], "gooddelarr")) {
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char *p = new char[64];
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operator delete[](p, 64);
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}
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if (!strcmp(argv[1], "baddelarr")) {
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char *p = new char[63];
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operator delete[](p, 64);
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}
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return 0;
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}
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2018-03-08 00:22:16 +08:00
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// CHECK: ERROR: invalid sized delete when deallocating address
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