https://bugs.llvm.org/show_bug.cgi?id=39576
Bug ID: 39576
Summary: [llvm-exegesis] segfault in llvm-exegesis
Product: tools
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: llvm-exegesis
Assignee: unassignedb...@nondot.org
Reporter: schu...@gmail.com
CC: clement.cour...@gmail.com, gchate...@google.com,
llvm-bugs@lists.llvm.org
Hi,
when running:
./llvm-exegesis -mode=latency -opcode-name=ADD64rr
I get a segfault. This seems to be independent of the arguments and I have been
running into this problem for a while now.
#0 0x00007ffff6c76d60 in std::string::data() const () from
/lib64/libstdc++.so.6
#1 0x000000000095f568 in StringRef (Str=<error reading variable: Cannot access
memory at address 0x1e0>, this=<optimized out>)
at /local/FOO/llvm/include/llvm/ADT/StringRef.h:96
#2 llvm::TargetMachine::getTargetCPU (this=0x0) at
/local/FOO/llvm/include/llvm/Target/TargetMachine.h:106
#3 0x000000000097ce2a in
llvm::exegesis::ExecutableFunction::ExecutableFunction(std::unique_ptr<llvm::LLVMTargetMachine,
std::default_delete<llvm::LLVMTargetMachine> >,
llvm::object::OwningBinary<llvm::object::ObjectFile>&&) (this=0x7fffffffdaf0,
TM=
std::unique_ptr<llvm::LLVMTargetMachine> containing 0x7fffffffdc40,
ObjectFileHolder=<unknown type in /local/FOO/clang/bin/llvm-exegesis, CU
0x466f33f, DIE 0x4778b6c>)
at /local/FOO/llvm/tools/llvm-exegesis/lib/Assembler.cpp:282
#4 0x000000000095ec01 in llvm::exegesis::BenchmarkRunner::runConfiguration
(this=0x36d4a80, BC=..., NumRepetitions=10000)
at /local/FOO/llvm/tools/llvm-exegesis/lib/BenchmarkRunner.cpp:126
#5 0x0000000000410c95 in llvm::exegesis::benchmarkMain () at
/local/FOO/llvm/tools/llvm-exegesis/llvm-exegesis.cpp:374
#6 0x0000000000411247 in main (Argc=3, Argv=0x7fffffffe148) at
/local/FOO/llvm/tools/llvm-exegesis/llvm-exegesis.cpp:455
This is a skylake server with CentOS 7.5. LLVM is a trunk build with debug.
Please let me now, if I you want me to provide more information.
Thanks,
Thorsten
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