74ad311556
Summary: Points the user to look at function pointer assignments. Reviewers: kcc, eugenis, kubamracek Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D30432 llvm-svn: 296653
34 lines
1.1 KiB
C++
34 lines
1.1 KiB
C++
// RUN: %clangxx_asan %s -o %t
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// RUN: not %run %t 0 2>&1 | FileCheck %s
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// RUN: not %run %t n 2>&1 | FileCheck %s -check-prefix=CHECK -check-prefix=NON_EXEC
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// Only Linux and FreeBSD list every memory region in MemoryMappingLayout, for now.
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// REQUIRES: linux || freebsd
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#include <assert.h>
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typedef void void_f();
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int main(int argc, char **argv) {
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char *array = new char[42];
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void_f *func;
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assert(argc > 1);
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if (argv[1][0] == '0') {
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func = (void_f *)0x04;
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} else {
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assert(argv[1][0] == 'n');
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func = (void_f *)array;
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}
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func();
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// x86 reports the SEGV with both address=X and pc=X.
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// On PowerPC64 ELFv1, the pointer is taken to be a function-descriptor
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// pointer out of which three 64-bit quantities are read. This will SEGV, but
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// the compiler is free to choose the order. As a result, the address is
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// either X, X+0x8 or X+0x10. The pc is still in main() because it has not
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// actually made the call when the faulting access occurs.
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// CHECK: DEADLYSIGNAL
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// CHECK: {{AddressSanitizer: (SEGV|access-violation).*(address|pc) }}
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// NON_EXEC: PC is at a non-executable region. Maybe a wild jump?
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return 0;
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}
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