0867edfc64
Adds the basic instrumentation needed for stack tagging. Currently does not support stack short granules or TLS stack histories, since a different code path is followed for the callback instrumentation we use. We may simply wait to support these two features until we switch to a custom calling convention. Patch By: xiangzhangllvm, morehouse Reviewed By: vitalybuka Differential Revision: https://reviews.llvm.org/D102901
23 lines
691 B
C
23 lines
691 B
C
// RUN: %clang_hwasan -g %s -o %t && not %run %t 2>&1 | FileCheck %s
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// Dynamic stack realignment causes debug info locations to use non-FP-relative
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// offsets because stack frames are realigned below FP, which means that we
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// can't associate addresses with stack objects in this case. Ideally we should
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// be able to handle this case somehow (e.g. by using a different register for
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// DW_AT_frame_base) but at least we shouldn't get confused by it.
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// REQUIRES: pointer-tagging
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__attribute((noinline))
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char *buggy() {
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_Alignas(64) char c[64];
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char *volatile p = c;
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return p;
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}
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int main() {
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char *p = buggy();
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// CHECK-NOT: Potentially referenced stack objects:
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p[0] = 0;
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}
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