2014-05-01 05:34:17 +08:00
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// RUN: %clangxx_asan -O0 %s -o %t && not %run %t 2>&1 | FileCheck %s
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2012-12-26 22:44:46 +08:00
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#include <string.h>
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namespace XXX {
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struct YYY {
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static int ZZZ(int x) {
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char array[10];
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memset(array, 0, 10);
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return array[x]; // BOOOM
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[asan] Change the way we report the alloca frame on stack-buff-overflow.
Before: the function name was stored by the compiler as a constant string
and the run-time was printing it.
Now: the PC is stored instead and the run-time prints the full symbolized frame.
This adds a couple of instructions into every function with non-empty stack frame,
but also reduces the binary size because we store less strings (I saw 2% size reduction).
This change bumps the asan ABI version to v3.
compiler-rt part, llvm part will follow.
Example of report (now):
==31711==ERROR: AddressSanitizer: stack-buffer-overflow on address 0x7fffa77cf1c5 at pc 0x41feb0 bp 0x7fffa77cefb0 sp 0x7fffa77cefa8
READ of size 1 at 0x7fffa77cf1c5 thread T0
#0 0x41feaf in Frame0(int, char*, char*, char*) stack-oob-frames.cc:20
#1 0x41f7ff in Frame1(int, char*, char*) stack-oob-frames.cc:24
#2 0x41f477 in Frame2(int, char*) stack-oob-frames.cc:28
#3 0x41f194 in Frame3(int) stack-oob-frames.cc:32
#4 0x41eee0 in main stack-oob-frames.cc:38
#5 0x7f0c5566f76c (/lib/x86_64-linux-gnu/libc.so.6+0x2176c)
#6 0x41eb1c (/usr/local/google/kcc/llvm_cmake/a.out+0x41eb1c)
Address 0x7fffa77cf1c5 is located in stack of thread T0 at offset 293 in frame
#0 0x41f87f in Frame0(int, char*, char*, char*) stack-oob-frames.cc:12 <<<<<<<<<<<<<< this is new
This frame has 6 object(s):
[32, 36) 'frame.addr'
[96, 104) 'a.addr'
[160, 168) 'b.addr'
[224, 232) 'c.addr'
[288, 292) 's'
[352, 360) 'd'
llvm-svn: 177723
2013-03-22 18:36:24 +08:00
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// CHECK: ERROR: AddressSanitizer: stack-buffer-overflow
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// CHECK: READ of size 1 at
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// CHECK: is located in stack of thread T0 at offset
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// CHECK: XXX::YYY::ZZZ
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2012-12-26 22:44:46 +08:00
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}
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};
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2013-01-30 15:45:58 +08:00
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} // namespace XXX
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2012-12-26 22:44:46 +08:00
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int main(int argc, char **argv) {
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int res = XXX::YYY::ZZZ(argc + 10);
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return res;
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}
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