[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 %s -o %t
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2016-08-26 08:06:03 +08:00
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// RUN: rm -rf %T/random_shuffle_tmp_dir
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// RUN: mkdir %T/random_shuffle_tmp_dir
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// RUN: %run %t 100 > %T/random_shuffle_tmp_dir/out1
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// RUN: %run %t 100 > %T/random_shuffle_tmp_dir/out2
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// RUN: %run %t 10000 > %T/random_shuffle_tmp_dir/out1
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// RUN: %run %t 10000 > %T/random_shuffle_tmp_dir/out2
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// RUN: not diff %T/random_shuffle_tmp_dir/out?
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// RUN: rm -rf %T/random_shuffle_tmp_dir
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// Tests that the allocator shuffles the chunks before returning to the user.
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#include <stdlib.h>
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#include <stdio.h>
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int main(int argc, char **argv) {
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int alloc_size = argc == 2 ? atoi(argv[1]) : 100;
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char *base = new char[alloc_size];
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for (int i = 0; i < 20; i++) {
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char *p = new char[alloc_size];
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printf("%zd\n", base - p);
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}
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}
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