Run the ilc .sln project ILCompiler, and the object file it generates is garbled

tangyanzhi commented 1 year ago

Description

I ran the ILCompiler project, generated the repro.obj file, opened repro.obj with Notepad and saw garbled characters, how to solve this problem?

repro.obj path is：...\artifacts\bin\repro\x64\Debug

Reproduction Steps

As shown above

Expected behavior

I want to open repro.obj to see what's inside

Actual behavior

I want to open repro.obj to see what's inside, but it's garbled

Regression?

No response

Known Workarounds

No response

Configuration

E:\Visual Studio Project\ConsoleApp9\ConsoleApp3>dotnet --info
.NET SDK:
 Version:   8.0.100-preview.5.23303.2
 Commit:    3fe444af72

 OS Name:     Windows
 OS Version:  10.0.22621
 OS Platform: Windows
 RID:         win10-x64
 Base Path:   C:\Program Files\dotnet\sdk\8.0.100-preview.5.23303.2\

.NET workloads installed:

Host:
  Version:      8.0.0-preview.5.23280.8
  Architecture: x64
  Commit:       bc78804f5d

.NET SDKs installed:
  7.0.100 [C:\Program Files\dotnet\sdk]
  7.0.304 [C:\Program Files\dotnet\sdk]
  8.0.100-preview.5.23303.2 [C:\Program Files\dotnet\sdk]

Other information

No response

MichalStrehovsky commented 1 year ago

.obj file format is a binary file format, similar to .exe. One doesn't use Notepad to inspect either of those. You can e.g. use dumpbin /all repro.obj to look at the contents. Docs for dumpbin are here: https://learn.microsoft.com/en-us/cpp/build/reference/dumpbin-command-line?view=msvc-170. There are other tools that can open this too, searching the internet helps.

tangyanzhi commented 1 year ago

.obj file format is a binary file format, similar to .exe. One doesn't use Notepad to inspect either of those. You can e.g. use dumpbin /all repro.obj to look at the contents. Docs for dumpbin are here: https://learn.microsoft.com/en-us/cpp/build/reference/dumpbin-command-line?view=msvc-170. There are other tools that can open this too, searching the internet helps.

Use .Net7, i can open this repro.obj file with Notepad, why not now?

MichalStrehovsky commented 1 year ago

.obj file format is a binary file format, similar to .exe. One doesn't use Notepad to inspect either of those. You can e.g. use dumpbin /all repro.obj to look at the contents. Docs for dumpbin are here: https://learn.microsoft.com/en-us/cpp/build/reference/dumpbin-command-line?view=msvc-170. There are other tools that can open this too, searching the internet helps.

Use .Net7, i can open this repro.obj file with Notepad, why not now?

Can you post a screenshot of what you see?

tangyanzhi commented 1 year ago

.obj file format is a binary file format, similar to .exe. One doesn't use Notepad to inspect either of those. You can e.g. use dumpbin /all repro.obj to look at the contents. Docs for dumpbin are here: https://learn.microsoft.com/en-us/cpp/build/reference/dumpbin-command-line?view=msvc-170. There are other tools that can open this too, searching the internet helps.

Use .Net7, i can open this repro.obj file with Notepad, why not now?

Can you post a screenshot of what you see?

yes ,A few previous images can be found

MichalStrehovsky commented 1 year ago

yes ,A few previous images can be found

This is not contents of the obj file opened in Notepad. This is a disassembly. Whatever produced the disassembly for the .NET 7 object file should be able to produce it for .NET 8 as well, but I don't know what you used on 7.

tangyanzhi commented 1 year ago

yes ,A few previous images can be found

This is not contents of the obj file opened in Notepad. This is a disassembly. Whatever produced the disassembly for the .NET 7 object file should be able to produce it for .NET 8 as well, but I don't know what you used on 7.

This is Notepad

Inside obj are assembly code and other debugging symbols for linking purposes. I remember opening it with Notepad before, but now I don't know why it doesn't work.

tangyanzhi commented 1 year ago

yes ,A few previous images can be found

This is not contents of the obj file opened in Notepad. This is a disassembly. Whatever produced the disassembly for the .NET 7 object file should be able to produce it for .NET 8 as well, but I don't know what you used on 7.

Sorry, I remember, at that time I exported repro.obj to notepad via dumpbin, so the screenshot is notepad, but not obj files cannot be opened directly with notepad.

Thank you for your answer

dotnet / runtime