runtime: windows/amd64 crash in -buildmode=c-shared library #59705
Description
What version of Go are you using (go version)?
$ go version go version go1.20.3 linux/amd64
Does this issue reproduce with the latest release?
Yes.
It is actually a regression compared to 1.19.8. Where this crash is not happening.
What operating system and processor architecture are you using (go env)?
go env Output
$ go env root@c300f22c186f:/# go version go version go1.20.3 linux/amd64 root@c300f22c186f:/# go env GO111MODULE="" GOARCH="amd64" GOBIN="" GOCACHE="/root/.cache/go-build" GOENV="/root/.config/go/env" GOEXE="" GOEXPERIMENT="" GOFLAGS="" GOHOSTARCH="amd64" GOHOSTOS="linux" GOINSECURE="" GOMODCACHE="/root/go/pkg/mod" GONOPROXY="" GONOSUMDB="" GOOS="linux" GOPATH="/root/go" GOPRIVATE="" GOPROXY="https://proxy.golang.org,direct" GOROOT="/usr/local/go" GOSUMDB="sum.golang.org" GOTMPDIR="" GOTOOLDIR="/usr/local/go/pkg/tool/linux_amd64" GOVCS="" GOVERSION="go1.20.3" GCCGO="gccgo" GOAMD64="v1" AR="ar" CC="gcc" CXX="g++" CGO_ENABLED="1" GOMOD="/dev/null" GOWORK="" CGO_CFLAGS="-O2 -g" CGO_CPPFLAGS="" CGO_CXXFLAGS="-O2 -g" CGO_FFLAGS="-O2 -g" CGO_LDFLAGS="-O2 -g" PKG_CONFIG="pkg-config" GOGCCFLAGS="-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build4015789462=/tmp/go-build -gno-record-gcc-switches"
What did you do?
Cross compiling with -buildmode=c-shared from linux/amd64 for windows/amd64 with cgo enabled.
For cgo, regular MinGW/GCC as well as MinGW/LLVM compiler have been tried.
https://github.com/fzwoch/obs-teleport (project's code)
What did you expect to see?
The resulting .dll file is a plugin for https://github.com/obsproject/obs-studio
I expected that application to successfully load the shared library.
It does so when the plugin is compiled with go1.19.8 linux/amd64.
What did you see instead?
Getting the following runtime crash when loading the library in OBS Studio.
Unfortunately no more details. I have no particular good knowledge on how to produce proper debug versions/stack traces with MSVC.
Only got a stack trace with three frames in it:
runtime.abort()
--- /usr/local/go/src/runtime\asm_amd64.s --------------------------------------
00007FF9A23D50C1 add ebp,ebx <========== final crash
00007FF9A23D50C3 dec ah
runtime.wintls()
--- /usr/local/go/src/runtime\sys_windows_amd64.s ------------------------------
00007FF9A23D71C0 mov rax,rsp
00007FF9A23D71C3 and rsp,0FFFFFFFFFFFFFFF0h
00007FF9A23D71C7 sub rsp,30h
00007FF9A23D71CB mov qword ptr [rsp+20h],rax
00007FF9A23D71D0 mov rax,qword ptr [7FF9A26D58B0h]
00007FF9A23D71D7 call rax
00007FF9A23D71D9 mov rsp,qword ptr [rsp+20h]
00007FF9A23D71DE mov rcx,rax
00007FF9A23D71E1 cmp rcx,40h
00007FF9A23D71E5 jb 00007FF9A23D71EC
00007FF9A23D71E7 call 00007FF9A23D50C0
00007FF9A23D71EC shl rcx,3 <========== 2nd stack frame location
00007FF9A23D71F0 add rcx,1480h
00007FF9A23D71F7 mov qword ptr [7FF9A2732838h],rcx
00007FF9A23D71FE ret
runtime.rt0_go()
--- /usr/local/go/src/runtime\asm_amd64.s --------------------------------------
00007FF9A23D2D20 mov rax,rdi
00007FF9A23D2D23 mov rbx,rsi
00007FF9A23D2D26 sub rsp,28h
00007FF9A23D2D2A and rsp,0FFFFFFFFFFFFFFF0h
00007FF9A23D2D2E mov qword ptr [rsp+18h],rax
00007FF9A23D2D33 mov qword ptr [rsp+20h],rbx
00007FF9A23D2D38 lea rdi,[7FF9A26DFB40h]
00007FF9A23D2D3F lea rbx,[rsp-0FF98h]
00007FF9A23D2D47 mov qword ptr [rdi+10h],rbx
00007FF9A23D2D4B mov qword ptr [rdi+18h],rbx
00007FF9A23D2D4F mov qword ptr [rdi],rbx
00007FF9A23D2D52 mov qword ptr [rdi+8],rsp
00007FF9A23D2D56 mov eax,0
00007FF9A23D2D5B cpuid
00007FF9A23D2D5D cmp eax,0
00007FF9A23D2D60 je 00007FF9A23D2D8E
00007FF9A23D2D62 cmp ebx,756E6547h
00007FF9A23D2D68 jne 00007FF9A23D2D81
00007FF9A23D2D6A cmp edx,49656E69h
00007FF9A23D2D70 jne 00007FF9A23D2D81
00007FF9A23D2D72 cmp ecx,6C65746Eh
00007FF9A23D2D78 jne 00007FF9A23D2D81
00007FF9A23D2D7A mov byte ptr [7FF9A273260Bh],1
00007FF9A23D2D81 mov eax,1
00007FF9A23D2D86 cpuid
00007FF9A23D2D88 mov dword ptr [7FF9A2732674h],eax
00007FF9A23D2D8E mov rax,qword ptr [7FF9A26D52E8h]
00007FF9A23D2D95 test rax,rax
00007FF9A23D2D98 je 00007FF9A23D2DDC
00007FF9A23D2D9A lea rsi,[7FF9A23D21E0h]
00007FF9A23D2DA1 mov rdx,0
00007FF9A23D2DA8 mov rcx,0
00007FF9A23D2DAF lea rdx,[7FF9A2732838h]
00007FF9A23D2DB6 mov r9,rcx
00007FF9A23D2DB9 mov r8,rdx
00007FF9A23D2DBC mov rdx,rsi
00007FF9A23D2DBF mov rcx,rdi
00007FF9A23D2DC2 call rax
00007FF9A23D2DC4 lea rcx,[7FF9A26DFB40h]
00007FF9A23D2DCB mov rax,qword ptr [rcx]
00007FF9A23D2DCE add rax,13A0h
00007FF9A23D2DD4 mov qword ptr [rcx+10h],rax
00007FF9A23D2DD8 mov qword ptr [rcx+18h],rax
00007FF9A23D2DDC call 00007FF9A23D71C0
00007FF9A23D2DE1 lea rdi,[7FF9A26DFF38h] <========== first stack frame location
00007FF9A23D2DE8 call 00007FF9A23D7040
00007FF9A23D2DED mov rbx,qword ptr [7FF9A2732838h]
00007FF9A23D2DF4 mov rbx,qword ptr gs:[rbx]
00007FF9A23D2DF8 mov qword ptr [rbx],123h
00007FF9A23D2DFF mov rax,qword ptr [7FF9A26DFF38h]
00007FF9A23D2E06 cmp rax,123h
00007FF9A23D2E0C je 00007FF9A23D2E13
00007FF9A23D2E0E call 00007FF9A23D50C0
00007FF9A23D2E13 mov rbx,qword ptr [7FF9A2732838h]
00007FF9A23D2E1A mov rbx,qword ptr gs:[rbx]
00007FF9A23D2E1E lea rcx,[7FF9A26DFB40h]
00007FF9A23D2E25 mov qword ptr [rbx],rcx
00007FF9A23D2E28 lea rax,[7FF9A26DFEE0h]
00007FF9A23D2E2F mov qword ptr [rax],rcx
00007FF9A23D2E32 mov qword ptr [rcx+30h],rax
00007FF9A23D2E36 cld
00007FF9A23D2E37 call 00007FF9A23D7A40
00007FF9A23D2E3C mov eax,dword ptr [rsp+18h]
00007FF9A23D2E40 mov dword ptr [rsp],eax
00007FF9A23D2E43 mov rax,qword ptr [rsp+20h]
00007FF9A23D2E48 mov qword ptr [rsp+8],rax
00007FF9A23D2E4D call 00007FF9A23D7A00
00007FF9A23D2E52 call 00007FF9A23D7760
00007FF9A23D2E57 call 00007FF9A23D7940
00007FF9A23D2E5C lea rax,[7FF9A25A97D0h]
00007FF9A23D2E63 push rax
00007FF9A23D2E64 call 00007FF9A23D79C0
00007FF9A23D2E69 pop rax
00007FF9A23D2E6A call 00007FF9A23D2EE0
00007FF9A23D2E6F call 00007FF9A23D50C0
00007FF9A23D2E74 ret
00007FF9A23D2E75 mov qword ptr [rsp],2
00007FF9A23D2E7D lea rax,[7FF9A25AB7A0h]
00007FF9A23D2E84 mov qword ptr [rsp+8],rax
00007FF9A23D2E89 mov qword ptr [rsp+10h],54h
00007FF9A23D2E92 call 00007FF9A23D7DA0
00007FF9A23D2E97 mov qword ptr [rsp],1
00007FF9A23D2E9F call 00007FF9A23D77E0
00007FF9A23D2EA4 call 00007FF9A23D50C0
00007FF9A23D2EA9 ret
00007FF9A23D2EAA lea rax,[7FF9A23D5480h]
00007FF9A23D2EB1 ret