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| author | Dmitry Vyukov <dvyukov@google.com> | 2013-10-03 16:53:50 +0000 |
|---|---|---|
| committer | Dmitry Vyukov <dvyukov@google.com> | 2013-10-03 16:53:50 +0000 |
| commit | c967d2f49c1437dbe9c2587504f68cbe008f6d6d (patch) | |
| tree | 9589765f000211881dc6c152a7d34809de2156c1 /clang/lib/StaticAnalyzer/Checkers/CStringChecker.cpp | |
| parent | 53f45c7d55355ff35b872aa3c9dd030c01a4d7ef (diff) | |
| download | bcm5719-llvm-c967d2f49c1437dbe9c2587504f68cbe008f6d6d.tar.gz bcm5719-llvm-c967d2f49c1437dbe9c2587504f68cbe008f6d6d.zip | |
asan/msan/tsan: fix broken linux syscalls
Currently the following source code:
u64 NanoTime() {
kernel_timeval tv = {};
internal_syscall(__NR_gettimeofday, &tv, 0);
return (u64)tv.tv_sec * 1000*1000*1000 + tv.tv_usec * 1000;
}
generates the following assembly:
Dump of assembler code for function __sanitizer::NanoTime():
=> 0x00007ff30657d380 <+0>: lea -0x10(%rsp),%rdi
0x00007ff30657d385 <+5>: xor %esi,%esi
0x00007ff30657d387 <+7>: mov $0x60,%eax
0x00007ff30657d38c <+12>: syscall
0x00007ff30657d38e <+14>: mov $0,%eax
0x00007ff30657d393 <+19>: retq
with this change:
Dump of assembler code for function __sanitizer::NanoTime():
=> 0x00007faab834f380 <+0>: movq $0x0,-0x10(%rsp)
0x00007faab834f389 <+9>: movq $0x0,-0x8(%rsp)
0x00007faab834f392 <+18>: lea -0x10(%rsp),%rdi
0x00007faab834f397 <+23>: xor %esi,%esi
0x00007faab834f399 <+25>: mov $0x60,%eax
0x00007faab834f39e <+30>: syscall
0x00007faab834f3a0 <+32>: mov -0x8(%rsp),%rax
0x00007faab834f3a5 <+37>: mov -0x10(%rsp),%rcx
0x00007faab834f3aa <+42>: imul $0x3e8,%rax,%rdx
0x00007faab834f3b1 <+49>: imul $0x3b9aca00,%rcx,%rax
0x00007faab834f3b8 <+56>: add %rdx,%rax
0x00007faab834f3bb <+59>: retq
llvm-svn: 191908
Diffstat (limited to 'clang/lib/StaticAnalyzer/Checkers/CStringChecker.cpp')
0 files changed, 0 insertions, 0 deletions
