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Summary: ShadowCallStack on x86_64 suffered from the same racy security issues as Return Flow Guard and had performance overhead as high as 13% depending on the benchmark. x86_64 ShadowCallStack was always an experimental feature and never shipped a runtime required to support it, as such there are no expected downstream users. Reviewers: pcc Reviewed By: pcc Subscribers: mgorny, javed.absar, hiraditya, jdoerfert, cfe-commits, #sanitizers, llvm-commits Tags: #clang, #sanitizers, #llvm Differential Revision: https://reviews.llvm.org/D59034 llvm-svn: 355624
38 lines
946 B
C
38 lines
946 B
C
// Test that a stack overflow fails as expected
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// RUN: %clang_noscs %s -o %t -DITERATIONS=3
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// RUN: %run %t | FileCheck %s
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// RUN: %clang_noscs %s -o %t -DITERATIONS=12
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// RUN: %run %t | FileCheck -check-prefix=OVERFLOW_SUCCESS %s
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// RUN: %clang_scs %s -o %t -DITERATIONS=3
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// RUN: %run %t | FileCheck %s
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// On aarch64 we just load the return address from the shadow call stack so we
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// do not expect to see the output from print_and_exit.
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// RUN: %clang_scs %s -o %t -DITERATIONS=12
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// RUN: %run %t | FileCheck %S/overflow.c
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#include <stdio.h>
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#include <stdlib.h>
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#include "minimal_runtime.h"
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void print_and_exit(void) {
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// CHECK-NOT: Stack overflow successful.
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// OVERFLOW_SUCCESS: Stack overflow successful.
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scs_fputs_stdout("Stack overflow successful.\n");
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exit(0);
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}
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int scs_main(void)
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{
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void *addrs[4];
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for (int i = 0; i < ITERATIONS; i++)
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addrs[i] = &print_and_exit;
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scs_fputs_stdout("Returning.\n");
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return 0;
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}
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