Building libfuzzer_stb_image on Windows about libafl HOT 24 CLOSED

i got it.
to stb_image/Cargo.toml add libfuzzer_no_link_main feature to libafl_targets then it will work

from libafl.

The problem is in libafl_targets. I get the same problem when I try to build it on its own or when trying to build other crates that depend on it (e.g. libafl_frida)

from libafl.

This H file comes from the LLVM includes. By default, they are not added to the INCLUDE path. If I add them using CFLAGS, the compilation fails, as MSVC's cl.exe can't process the LLVM includes. I'd appreciate some help in setting this correctly.

from libafl.

yes i know what causes it. i'll quickly fix

from libafl.

well, the problem i thought was the cause is not related.
how did you install llvm?

from libafl.

I downloaded LLVM-17.0.1-win64.exe from Releases. I first installed it in Program Files. Then I saw that the space in the path causes problems in CFLAGS. So I copied it over to c:\LLVM and updated the PATH. How should the integration between msvc and llvm work?

from libafl.

it's clang that is called from build.rs to compile the stuff not cl.exe
what is the error you saw when you includes the llvm headers?

from libafl.

I can clearly see it is cl.exe that is called. Please see the error print above. When I build libafl_targets by itself, it compiles 4 files (common, coverage, libcmp, windows_asan) using cl.exe and they are compiled successfully. When I build libafl_frida, it tries to build sancov_cmp.c using cl.exe. When I add LLVM headers it produces loads of warnings and errors like:
CFLAGS = Some("-IC:\LLVM\lib\clang\17\include")
running: "C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\VC\Tools\MSVC\14.29.30133\bin\HostX64\x64\cl.exe" "-nologo" "-MD" "-O2" "-Z7" "-Brepro" "-IC:\LLVM\lib\clang\17\include" "-DSANCOV_CMPLOG=1" "-DCMP_MAP_SIZE=65536" "-DAFLPP_CMPLOG_MAP_W=65536" "-DAFLPP_CMPLOG_MAP_H=32" "-DCMPLOG_MAP_W=65536" "-DCMPLOG_MAP_H=32" "-FoC:\LibAFL\fuzzers\frida_libpng\target\release\build\libafl_targets-e5d08c87abdadb46\out\src\sancov_cmp.o" "-c" "src\sancov_cmp.c"
sancov_cmp.c
C:\LLVM\lib\clang\17\include\stdint.h(20): warning C4067: unexpected tokens following preprocessor directive - expected a newline
C:\LLVM\lib\clang\17\include\stdint.h(291): error C2061: syntax error: identifier 'intptr_t'
C:\LLVM\lib\clang\17\include\stdint.h(291): error C2059: syntax error: ';'
C:\LLVM\lib\clang\17\include\stdint.h(298): error C2061: syntax error: identifier 'uintptr_t'
C:\LLVM\lib\clang\17\include\stdint.h(298): error C2059: syntax error: ';'
C:\LLVM\lib\clang\17\include\stdint.h(304): error C2061: syntax error: identifier 'intmax_t'
C:\LLVM\lib\clang\17\include\stdint.h(304): error C2059: syntax error: ';'
C:\LLVM\lib\clang\17\include\stdint.h(305): error C2061: syntax error: identifier 'uintmax_t'
C:\LLVM\lib\clang\17\include\stdint.h(305): error C2059: syntax error: ';'
C:\LLVM\lib\clang\17\include\stddef.h(18): warning C4067: unexpected tokens following preprocessor directive - expected a newline
C:\LLVM\lib\clang\17\include\stddef.h(30): warning C4067: unexpected tokens following preprocessor directive - expected a newline
C:\LLVM\lib\clang\17\include\stddef.h(32): warning C4067: unexpected tokens following preprocessor directive - expected a newline
C:\LLVM\lib\clang\17\include\stddef.h(35): error C2061: syntax error: identifier 'ptrdiff_t'
C:\LLVM\lib\clang\17\include\stddef.h(35): error C2059: syntax error: ';'
C:\LLVM\lib\clang\17\include\stddef.h(41): warning C4067: unexpected tokens following preprocessor directive - expected a newline
C:\LLVM\lib\clang\17\include\stddef.h(43): warning C4067: unexpected tokens following preprocessor directive - expected a newline
C:\LLVM\lib\clang\17\include\stddef.h(46): error C2054: expected '(' to follow 'SIZE_TYPE'
C:\LLVM\lib\clang\17\include\stddef.h(55): warning C4067: unexpected tokens following preprocessor directive - expected a newline
C:\LLVM\lib\clang\17\include\stddef.h(67): warning C4067: unexpected tokens following preprocessor directive - expected a newline
C:\LLVM\lib\clang\17\include\stddef.h(68): warning C4067: unexpected tokens following preprocessor directive - expected a newline
C:\LLVM\lib\clang\17\include\stddef.h(74): error C2085: 'WCHAR_TYPE': not in formal parameter list
C:\LLVM\lib\clang\17\include\stddef.h(74): error C2146: syntax error: missing ',' before identifier 'wchar_t'
C:\LibAFL\libafl_targets\src\cmplog.h(23): error C2061: syntax error: identifier 'uint16_t'
C:\LibAFL\libafl_targets\src\cmplog.h(24): error C2061: syntax error: identifier 'shape'
C:\LibAFL\libafl_targets\src\cmplog.h(24): error C2059: syntax error: ';'
C:\LibAFL\libafl_targets\src\cmplog.h(25): error C2061: syntax error: identifier 'kind'
C:\LibAFL\libafl_targets\src\cmplog.h(25): error C2059: syntax error: ';'
C:\LibAFL\libafl_targets\src\cmplog.h(26): error C2059: syntax error: '}'
C:\LibAFL\libafl_targets\src\cmplog.h(52): error C2061: syntax error: identifier 'uint64_t'
C:\LibAFL\libafl_targets\src\cmplog.h(53): error C2061: syntax error: identifier 'v1'
C:\LibAFL\libafl_targets\src\cmplog.h(53): error C2059: syntax error: ';'
C:\LibAFL\libafl_targets\src\cmplog.h(54): error C2059: syntax error: '}'
C:\LibAFL\libafl_targets\src\cmplog.h(57): error C2061: syntax error: identifier 'uint8_t'
C:\LibAFL\libafl_targets\src\cmplog.h(58): error C2061: syntax error: identifier 'v1'
C:\LibAFL\libafl_targets\src\cmplog.h(58): error C2059: syntax error: ';'
C:\LibAFL\libafl_targets\src\cmplog.h(58): error C2059: syntax error: '['
C:\LibAFL\libafl_targets\src\cmplog.h(59): error C2059: syntax error: '}'
C:\LibAFL\libafl_targets\src\cmplog.h(62): error C2061: syntax error: identifier 'CmpLogHeader'
C:\LibAFL\libafl_targets\src\cmplog.h(64): error C2061: syntax error: identifier 'CmpLogInstruction'
C:\LibAFL\libafl_targets\src\cmplog.h(65): error C2061: syntax error: identifier 'routines'
C:\LibAFL\libafl_targets\src\cmplog.h(65): error C2059: syntax error: ';'
C:\LibAFL\libafl_targets\src\cmplog.h(65): error C2059: syntax error: '['
C:\LibAFL\libafl_targets\src\cmplog.h(66): error C2059: syntax error: '}'
C:\LibAFL\libafl_targets\src\cmplog.h(67): error C2059: syntax error: '}'
C:\LibAFL\libafl_targets\src\cmplog.h(72): error C2061: syntax error: identifier 'CmpLogInstruction'
C:\LibAFL\libafl_targets\src\cmplog.h(73): error C2061: syntax error: identifier 'routines'
C:\LibAFL\libafl_targets\src\cmplog.h(73): error C2059: syntax error: ';'
C:\LibAFL\libafl_targets\src\cmplog.h(73): error C2059: syntax error: '['
C:\LibAFL\libafl_targets\src\cmplog.h(74): error C2059: syntax error: '}'
C:\LibAFL\libafl_targets\src\cmplog.h(75): error C2059: syntax error: '}'
C:\LibAFL\libafl_targets\src\cmplog.h(77): error C2061: syntax error: identifier 'libafl_cmplog_map'
C:\LibAFL\libafl_targets\src\cmplog.h(77): error C2059: syntax error: ';'
C:\LibAFL\libafl_targets\src\cmplog.h(78): error C2143: syntax error: missing '{' before ''
C:\LibAFL\libafl_targets\src\cmplog.h(80): error C2061: syntax error: identifier 'libafl_cmplog_map_extended'
C:\LibAFL\libafl_targets\src\cmplog.h(80): error C2059: syntax error: ';'
C:\LibAFL\libafl_targets\src\cmplog.h(81): error C2143: syntax error: missing '{' before ''
C:\LibAFL\libafl_targets\src\cmplog.h(83): error C2061: syntax error: identifier 'libafl_cmplog_enabled'
C:\LibAFL\libafl_targets\src\cmplog.h(83): error C2059: syntax error: ';'
C:\LibAFL\libafl_targets\src\cmplog.h(85): error C2146: syntax error: missing ')' before identifier 'k'
C:\LibAFL\libafl_targets\src\cmplog.h(85): error C2061: syntax error: identifier 'k'
C:\LibAFL\libafl_targets\src\cmplog.h(85): error C2059: syntax error: ';'
C:\LibAFL\libafl_targets\src\cmplog.h(85): error C2059: syntax error: ','
C:\LibAFL\libafl_targets\src\cmplog.h(86): error C2059: syntax error: ')'
C:\LibAFL\libafl_targets\src\cmplog.h(88): error C2146: syntax error: missing ')' before identifier 'k'
C:\LibAFL\libafl_targets\src\cmplog.h(88): error C2061: syntax error: identifier 'k'
C:\LibAFL\libafl_targets\src\cmplog.h(88): error C2059: syntax error: ';'
C:\LibAFL\libafl_targets\src\cmplog.h(88): error C2059: syntax error: ','
C:\LibAFL\libafl_targets\src\cmplog.h(89): error C2059: syntax error: ')'
C:\LibAFL\libafl_targets\src\cmplog.h(91): error C2146: syntax error: missing ')' before identifier 'k'
C:\LibAFL\libafl_targets\src\cmplog.h(91): error C2061: syntax error: identifier 'k'
C:\LibAFL\libafl_targets\src\cmplog.h(91): error C2059: syntax error: ';'
C:\LibAFL\libafl_targets\src\cmplog.h(91): error C2059: syntax error: ','
C:\LibAFL\libafl_targets\src\cmplog.h(92): error C2059: syntax error: ')'
C:\LLVM\lib\clang\17\include\sanitizer/common_interface_defs.h(33): error C2061: syntax error: identifier 'intptr_t'
C:\LLVM\lib\clang\17\include\sanitizer/common_interface_defs.h(39): error C2059: syntax error: '}'
C:\LLVM\lib\clang\17\include\sanitizer/common_interface_defs.h(53): error C2143: syntax error: missing ')' before ''
C:\LLVM\lib\clang\17\include\sanitizer/common_interface_defs.h(53): error C2143: syntax error: missing '{' before ''
C:\LLVM\lib\clang\17\include\sanitizer/common_interface_defs.h(53): error C2059: syntax error: ')'
C:\LLVM\lib\clang\17\include\sanitizer/common_interface_defs.h(69): error C2061: syntax error: identifier '__sanitizer_unaligned_load16'
C:\LLVM\lib\clang\17\include\sanitizer/common_interface_defs.h(69): error C2059: syntax error: ';'
C:\LLVM\lib\clang\17\include\sanitizer/common_interface_defs.h(69): error C2059: syntax error: ''
C:\LLVM\lib\clang\17\include\sanitizer/common_interface_defs.h(76): error C2061: syntax error: identifier '__sanitizer_unaligned_load32'
C:\LLVM\lib\clang\17\include\sanitizer/common_interface_defs.h(76): error C2059: syntax error: ';'
C:\LLVM\lib\clang\17\include\sanitizer/common_interface_defs.h(76): error C2059: syntax error: ''
C:\LLVM\lib\clang\17\include\sanitizer/common_interface_defs.h(83): error C2061: syntax error: identifier '__sanitizer_unaligned_load64'
C:\LLVM\lib\clang\17\include\sanitizer/common_interface_defs.h(83): error C2059: syntax error: ';'
C:\LLVM\lib\clang\17\include\sanitizer/common_interface_defs.h(83): error C2059: syntax error: ''
C:\LLVM\lib\clang\17\include\sanitizer/common_interface_defs.h(89): error C2146: syntax error: missing ')' before identifier 'x'
C:\LLVM\lib\clang\17\include\sanitizer/common_interface_defs.h(89): error C2081: 'uint16_t': name in formal parameter list illegal
C:\LLVM\lib\clang\17\include\sanitizer/common_interface_defs.h(89): error C2061: syntax error: identifier 'x'
C:\LLVM\lib\clang\17\include\sanitizer/common_interface_defs.h(89): error C2059: syntax error: ';'
C:\LLVM\lib\clang\17\include\sanitizer/common_interface_defs.h(89): error C2059: syntax error: ')'
C:\LLVM\lib\clang\17\include\sanitizer/common_interface_defs.h(95): error C2146: syntax error: missing ')' before identifier 'x'
C:\LLVM\lib\clang\17\include\sanitizer/common_interface_defs.h(95): error C2081: 'uint32_t': name in formal parameter list illegal
C:\LLVM\lib\clang\17\include\sanitizer/common_interface_defs.h(95): error C2061: syntax error: identifier 'x'
C:\LLVM\lib\clang\17\include\sanitizer/common_interface_defs.h(95): error C2059: syntax error: ';'
C:\LLVM\lib\clang\17\include\sanitizer/common_interface_defs.h(95): error C2059: syntax error: ')'
C:\LLVM\lib\clang\17\include\sanitizer/common_interface_defs.h(101): error C2146: syntax error: missing ')' before identifier 'x'
C:\LLVM\lib\clang\17\include\sanitizer/common_interface_defs.h(101): error C2081: 'uint64_t': name in formal parameter list illegal
C:\LLVM\lib\clang\17\include\sanitizer/common_interface_defs.h(101): error C2061: syntax error: identifier 'x'
C:\LLVM\lib\clang\17\include\sanitizer/common_interface_defs.h(101): error C2059: syntax error: ';'
C:\LLVM\lib\clang\17\include\sanitizer/common_interface_defs.h(101): error C2059: syntax error: ')'
C:\LLVM\lib\clang\17\include\sanitizer/common_interface_defs.h(289): error C2059: syntax error: 'string'
src\sancov_cmp.c(12): error C2146: syntax error: missing ')' before identifier 'arg1'
src\sancov_cmp.c(12): error C2061: syntax error: identifier 'arg1'
src\sancov_cmp.c(12): error C2059: syntax error: ';'
src\sancov_cmp.c(12): error C2059: syntax error: ','
src\sancov_cmp.c(12): error C2059: syntax error: ')'
src\sancov_cmp.c(26): error C2146: syntax error: missing ')' before identifier 'arg1'
src\sancov_cmp.c(26): error C2061: syntax error: identifier 'arg1'
src\sancov_cmp.c(26): fatal error C1003: error count exceeds 100; stopping compilation
exit code: 2

--- stderr

error occurred: Command "C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\VC\Tools\MSVC\14.29.30133\bin\HostX64\x64\cl.exe" "-nologo" "-MD" "-O2" "-Z7" "-Brepro" "-IC:\LLVM\lib\clang\17\include" "-DSANCOV_CMPLOG=1" "-DCMP_MAP_SIZE=65536" "-DAFLPP_CMPLOG_MAP_W=65536" "-DAFLPP_CMPLOG_MAP_H=32" "-DCMPLOG_MAP_W=65536" "-DCMPLOG_MAP_H=32" "-FoC:\LibAFL\fuzzers\frida_libpng\target\release\build\libafl_targets-e5d08c87abdadb46\out\src\sancov_cmp.o" "-c" "src\sancov_cmp.c" with args "cl.exe" did not execute successfully (status code exit code: 2).

from libafl.

I ran unix2dos on all H files in the LLVM include

from libafl.

i think the problem comes from unix2dos.
why do you need it?

from libafl.

I thought it was needed because of the newlines. But I have reinstalled LLVM and now it has Linux end of lines. Regardless, I see the same behavior - cl.exe is run and not clang. And cl.exe does not like clang's headers. How is it supposed to work? Where should the compiler be selected? Maybe I need to reinstall the cc crate of something like this?

from libafl.

cl.exe is used to compile the llvm pass into a dll

then clang is used to compile the fuzzer libfuzzer_stb_image which uses the dll that was compiled before.

from libafl.

cl.exe is run and not clang. And cl.exe does not like clang's headers.

if the failure is in libafl_targets then yes it's all about cl.exe

And cl.exe does not like clang's headers.

what's the error if you don't use dos2unix? are you perhaps using cygwin or msys2? If so you should try this with powershell because i never tested this on cygwin or msys2

from libafl.

I'm using the original (not converted) LLVM headers now. They only have \n.
I was indeed compiling in Git Bash. I tried now in Powershell and get exactly the same behavior (not finding the LLVM headers without CFLAGS and failing cl.exe on compiling LLVM headers with CFLAGS):

from libafl.

honestly i don't know what is the cause. libafl_targets is building in our CI so i think it's something with your setup.

from libafl.

how did you install cl.exe

from libafl.

cl.exe comes from Visual Studio I had installed before installing LLVM.
I want to stress: libaft_targets builds when I build it on its own. Only when I build libafl_frida, it builds more files from libaft_targets and these require LLVM headers

from libafl.

Only when I build libafl_frida, it builds more files from libaft_targets and these require LLVM headers

yes because of common_interface_defs.h which is required by frida build. but that one also works in windows CI.

from libafl.

can you update your visual studio to 2022 and see if it fixes it?

from libafl.

I confirm that installing VS 2022 resolves the compilation issue. VS2022 comes with the required files and we don't need to add external LLVM.

from libafl.

Unfortunately, not everything has been resolved. After updating to VS 2022 libafl_frida is being built correctly, but libfuzzer_stb_image is not:
warning: __sanitizer_set_death_callback redeclared with a different signature
--> C:\LibAFL\libafl_targets\src\windows_asan.rs:15:5
|
15 | fn __sanitizer_set_death_callback(cb: CB);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this signature doesn't match the previous declaration
|
::: C:\LibAFL\fuzzers\libfuzzer_stb_image\target\release\build\libafl_targets-796f3221e0432581\out/sanitizer_interfaces.rs:260:5
|
260 | pub fn __sanitizer_set_death_callback(callback: ::core::option::Option<unsafe extern "C" fn()>);
| ----------------------------------------------------------------------------------------------- __sanitizer_set_death_callback previously declared here
|
= note: expected unsafe extern "C" fn(core::option::Option<unsafe extern "C" fn()>)
found unsafe extern "C" fn(unsafe extern "C" fn())
= note: #[warn(clashing_extern_declarations)] on by default

warning: libafl_targets (lib) generated 1 warning
warning: libafl (lib) generated 1 warning
error: linking with link.exe failed: exit code: 1120
|
= note: "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Tools\MSVC\14.37.32822\bin\HostX64\x64\link.exe" "/NOLOGO" "C:\Users\mkrav\AppData\Local\Temp\rustc2tUhqP\symbols.o" "C:\LibAFL\fuzzers\libfuzzer_stb_image\target\release\deps\libfuzzer_stb_image.libfuzzer_stb_image.50629f7fe474387d-cgu.0.rcgu.o" "/LIBPATH:C:\LibAFL\fuzzers\libfuzzer_stb_image\target\release\deps" "/LIBPATH:C:\LibAFL\fuzzers\libfuzzer_stb_image\target\release\build\libfuzzer_stb_image-0e5ba3b9e0cd37eb\out" "/LIBPATH:C:\LibAFL\fuzzers\libfuzzer_stb_image\target\release\build\libfuzzer_stb_image-0e5ba3b9e0cd37eb\out" "/LIBPATH:C:\Users\mkrav\.cargo\registry\src\index.crates.io-6f17d22bba15001f\windows_x86_64_msvc-0.48.5\lib" "/LIBPATH:C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Tools\MSVC\14.37.32822\atlmfc\lib\x64" "/LIBPATH:C:\LibAFL\fuzzers\libfuzzer_stb_image\target\release\build\libafl_targets-796f3221e0432581\out" "/LIBPATH:C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Tools\MSVC\14.37.32822\atlmfc\lib\x64" "/LIBPATH:C:\LibAFL\fuzzers\libfuzzer_stb_image\target\release\build\libafl_targets-796f3221e0432581\out" "/LIBPATH:C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Tools\MSVC\14.37.32822\atlmfc\lib\x64" "/LIBPATH:C:\LibAFL\fuzzers\libfuzzer_stb_image\target\release\build\libafl_targets-796f3221e0432581\out" "/LIBPATH:C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Tools\MSVC\14.37.32822\atlmfc\lib\x64" "/LIBPATH:C:\LibAFL\fuzzers\libfuzzer_stb_image\target\release\build\libafl_targets-796f3221e0432581\out" "/LIBPATH:C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Tools\MSVC\14.37.32822\atlmfc\lib\x64" "/LIBPATH:C:\LibAFL\fuzzers\libfuzzer_stb_image\target\release\build\libafl_targets-796f3221e0432581\out" "/LIBPATH:C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Tools\MSVC\14.37.32822\atlmfc\lib\x64" "/LIBPATH:C:\LibAFL\fuzzers\libfuzzer_stb_image\target\release\build\libafl_targets-796f3221e0432581\out" "/LIBPATH:C:\LibAFL\fuzzers\libfuzzer_stb_image\target\release\build\libafl_targets-796f3221e0432581\out" "/LIBPATH:C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Tools\MSVC\14.37.32822\atlmfc\lib\x64" "/LIBPATH:C:\LibAFL\fuzzers\libfuzzer_stb_image\target\release\build\libmimalloc-sys-912fc62ed971a7b8\out" "/LIBPATH:C:\Users\mkrav\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\x86_64-pc-windows-msvc\lib" "harness.lib" "C:\Users\mkrav\AppData\Local\Temp\rustc2tUhqP\liblibafl_targets-29d57f53f0080807.rlib" "C:\Users\mkrav\AppData\Local\Temp\rustc2tUhqP\liblibmimalloc_sys-493a7050e04f4994.rlib" "C:\Users\mkrav\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\x86_64-pc-windows-msvc\lib\libcompiler_builtins-9dbc16e13c04d841.rlib" "kernel32.lib" "windows.0.48.5.lib" "advapi32.lib" "cfgmgr32.lib" "gdi32.lib" "kernel32.lib" "msimg32.lib" "opengl32.lib" "synchronization.lib" "user32.lib" "winspool.lib" "windows.0.48.5.lib" "windows.0.48.5.lib" "bcrypt.lib" "advapi32.lib" "legacy_stdio_definitions.lib" "kernel32.lib" "advapi32.lib" "bcrypt.lib" "kernel32.lib" "ntdll.lib" "userenv.lib" "ws2_32.lib" "kernel32.lib" "ws2_32.lib" "kernel32.lib" "msvcrt.lib" "/NXCOMPAT" "/LIBPATH:C:\Users\mkrav\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\x86_64-pc-windows-msvc\lib" "/OUT:C:\LibAFL\fuzzers\libfuzzer_stb_image\target\release\deps\libfuzzer_stb_image.exe" "/OPT:REF,ICF" "/DEBUG" "/NATVIS:C:\Users\mkrav\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\etc\intrinsic.natvis" "/NATVIS:C:\Users\mkrav\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\etc\liballoc.natvis" "/NATVIS:C:\Users\mkrav\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\etc\libcore.natvis" "/NATVIS:C:\Users\mkrav\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\etc\libstd.natvis"
= note: liblibafl_targets-29d57f53f0080807.rlib(libfuzzer.o) : error LNK2005: main already defined in libfuzzer_stb_image.libfuzzer_stb_image.50629f7fe474387d-cgu.0.rcgu.o
Creating library C:\LibAFL\fuzzers\libfuzzer_stb_image\target\release\deps\libfuzzer_stb_image.lib and object C:\LibAFL\fuzzers\libfuzzer_stb_image\target\release\deps\libfuzzer_stb_image.exp
liblibafl_targets-29d57f53f0080807.rlib(libfuzzer.o) : error LNK2019: unresolved external symbol LLVMFuzzerRunDriver referenced in function main
C:\LibAFL\fuzzers\libfuzzer_stb_image\target\release\deps\libfuzzer_stb_image.exe : fatal error LNK1120: 1 unresolved externals

The following warnings were emitted during compilation:

warning: In file included from ./harness.c:10:
warning: ./stb_image.h:7307:15: warning: variable 'out_size' set but not used [-Wunused-but-set-variable]
warning: 7307 | int out_size = 0;
warning: | ^
warning: ./stb_image.h:7308:15: warning: variable 'delays_size' set but not used [-Wunused-but-set-variable]
warning: 7308 | int delays_size = 0;
warning: | ^
warning: 2 warnings generated.

error: could not compile libfuzzer_stb_image (bin "libfuzzer_stb_image") due to previous error

from libafl.

i think #981 broke it

from libafl.

can you add "libfuzzer_define_run_driver" to libafl_target's feature in libfuzzer_stb_image/Cargo.toml to see if it is fixed?

from libafl.

Added, but it did not resolve the issue. When I look at the code, I see no implementation of LLVMFuzzerRunDriver in libfuzzer.c of libafl_targets, just its declaration. The linker can't find a library where the function is implemented.

from libafl.