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<base href="https://bugs.llvm.org/">
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [UBSan/Win] Linker fails on code that uses int64_t multiplication in 32 bit build"
href="https://bugs.llvm.org/show_bug.cgi?id=36724">36724</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[UBSan/Win] Linker fails on code that uses int64_t multiplication in 32 bit build
</td>
</tr>
<tr>
<th>Product</th>
<td>compiler-rt
</td>
</tr>
<tr>
<th>Version</th>
<td>6.0
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Windows NT
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>compiler-rt
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>markus.maier.sw@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>* MSVC2015 32 Bit
* LLVM/Clang 6.0.0 with official installer, bin folder added to PATH
* Host OS: Windows 10 1703 x64
The following code fails to link with clang-cl when building with
-fsanitize=undefined:
______________________________________________
// file main.cpp
#include <iostream>
#include <cstdint>
using namespace std;
int main()
{
int64_t test = 1;
test *= 1000;
cout << "1 * 1000 = " << test << endl;
return 0;
}
______________________________________________
When changing int64_t to uint64_t, the code builds and runs as expected.
My build commands with "VS2015 x86 Native tools command prompt" including
output:
c:\build>clang-cl -fsanitize=undefined -v main.cpp
clang version 6.0.0 (tags/RELEASE_600/final)
Target: i686-pc-windows-msvc
Thread model: posix
InstalledDir: C:\Program Files (x86)\LLVM\bin
"C:\\Program Files (x86)\\LLVM\\bin\\clang-cl.exe" -cc1 -triple
i686-pc-windows-msvc19.0.24215 -emit-obj -mrelax-all
-mincremental-linker-compatible -disable-free -disable-llvm-verifier
-discard-value-names -main-file-name main.cpp -mrelocation-model static
-mthread-model posix -mdisable-fp-elim -relaxed-aliasing -fmath-errno
-masm-verbose -mconstructor-aliases -target-cpu pentium4 -D_MT
-flto-visibility-public-std --dependent-lib=libcmt --dependent-lib=oldnames
-stack-protector 2 -fms-volatile -fdiagnostics-format msvc -dwarf-column-info
-debugger-tuning=gdb -v -resource-dir "C:\\Program Files
(x86)\\LLVM\\lib\\clang\\6.0.0" -internal-isystem "C:\\Program Files
(x86)\\LLVM\\lib\\clang\\6.0.0\\include" -internal-isystem "C:\\Program Files
(x86)\\Microsoft Visual Studio 14.0\\VC\\INCLUDE" -internal-isystem
"C:\\Program Files (x86)\\Microsoft Visual Studio 14.0\\VC\\ATLMFC\\INCLUDE"
-internal-isystem "C:\\Program Files (x86)\\Windows
Kits\\10\\include\\10.0.10240.0\\ucrt" -internal-isystem "C:\\Program Files
(x86)\\Windows Kits\\NETFXSDK\\4.6.1\\include\\um" -internal-isystem
"C:\\Program Files (x86)\\Windows Kits\\8.1\\include\\\\shared"
-internal-isystem "C:\\Program Files (x86)\\Windows Kits\\8.1\\include\\\\um"
-internal-isystem "C:\\Program Files (x86)\\Windows
Kits\\8.1\\include\\\\winrt" -fdeprecated-macro -fdebug-compilation-dir
"c:\\build" -ferror-limit 19 -fmessage-length 120 "--dependent-lib=C:\\Program
Files
(x86)\\LLVM\\lib\\clang\\6.0.0\\lib\\windows\\clang_rt.ubsan_standalone-i386.lib"
"--dependent-lib=C:\\Program Files
(x86)\\LLVM\\lib\\clang\\6.0.0\\lib\\windows\\clang_rt.ubsan_standalone_cxx-i386.lib"
-fsanitize=alignment,array-bounds,bool,builtin,enum,float-cast-overflow,float-divide-by-zero,integer-divide-by-zero,nonnull-attribute,null,pointer-overflow,return,returns-nonnull-attribute,shift-base,shift-exponent,signed-integer-overflow,unreachable,vla-bound
-fsanitize-recover=alignment,array-bounds,bool,builtin,enum,float-cast-overflow,float-divide-by-zero,integer-divide-by-zero,nonnull-attribute,null,pointer-overflow,returns-nonnull-attribute,shift-base,shift-exponent,signed-integer-overflow,vla-bound
-fno-use-cxa-atexit -fms-extensions -fms-compatibility
-fms-compatibility-version=19.0.24215 -std=c++14 -fdelayed-template-parsing
-fobjc-runtime=gcc -fdiagnostics-show-option -fcolor-diagnostics -o
"C:\\Users\\m2_maier\\AppData\\Local\\Temp\\main-366977.obj" -x c++ main.cpp
clang -cc1 version 6.0.0 based upon LLVM 6.0.0 default target
i686-pc-windows-msvc
#include "..." search starts here:
#include <...> search starts here:
C:\Program Files (x86)\LLVM\lib\clang\6.0.0\include
C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\INCLUDE
C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\ATLMFC\INCLUDE
C:\Program Files (x86)\Windows Kits\10\include\10.0.10240.0\ucrt
C:\Program Files (x86)\Windows Kits\NETFXSDK\4.6.1\include\um
C:\Program Files (x86)\Windows Kits\8.1\include\\shared
C:\Program Files (x86)\Windows Kits\8.1\include\\um
C:\Program Files (x86)\Windows Kits\8.1\include\\winrt
End of search list.
"C:\\Program Files (x86)\\Microsoft Visual Studio 14.0\\VC\\bin\\link.exe"
-out:main.exe -nologo
"C:\\Users\\markus\\AppData\\Local\\Temp\\main-366977.obj"
Creating library main.lib and object main.exp
main-366977.obj : error LNK2019: unresolved external symbol ___mulodi4
referenced in function _main
main.exe : fatal error LNK1120: 1 unresolved externals
clang-cl.exe: error: linker command failed with exit code 1120 (use -v to see
invocation)
c:\build></pre>
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