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Add perfmap debug directory entry to crossgen2 output as needed #58552

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merged 5 commits into from
Sep 10, 2021
Merged

Add perfmap debug directory entry to crossgen2 output as needed #58552

merged 5 commits into from
Sep 10, 2021

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hoyosjs
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@hoyosjs hoyosjs commented Sep 2, 2021 •
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This change in general contains:

  • Only pass perfmap argument for Linux SPC. We were always passing it down (not all that important)
  • Add PerfMap Debug Directory Entry spec to the COFF spec for SRM.
  • Enhance CrossGen2 to emit PerfMap debug directory record. Tested that I can correlate entries as needed on Windows.
    For example the header in the perfmap is:
FFFFFFFF 00 6819a895-6568-e40a-b8dc-cc7f97c73524
FFFFFFFE 00 1
FFFFFFFD 00 Windows
FFFFFFFC 00 X64
FFFFFFFC 00 CoreRT

and the entries in the PE are:

--- PE FILE: E:\repos\runtime\artifacts\bin\coreclr\windows.x64.Debug\System.Private.CoreLib.dll ---
CodeView
        System.Private.CoreLib.ni.pdb, Age = 1, 19c03592-b136-04bf-12f9-f1a7a2d1efc3
21
        System.Private.CoreLib.r2rmap, Signature = 95 a8 19 68 68 65 0a e4 b8 dc cc 7f 97 c7 35 24, Version = 1
CodeView
        E:\repos\runtime\artifacts\obj\coreclr\System.Private.CoreLib\x64\Debug\System.Private.CoreLib.pdb, Age = 1, 89aa3509-94b5-4f46-8f53-a0fab72a0639
Reproducible
  • Stop emitting an ni.pdb record when PDB is not requested (Linux scenario).

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hoyosjs commented Sep 2, 2021

cc: @tommcdon @mangod9 @brianrob

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hoyosjs commented Sep 2, 2021

This is related to #58468 on main.

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trylek commented Sep 2, 2021

In your snippet of the PerfMap file above,

FFFFFFFC 00 X64
FFFFFFFC 00 CoreRT

is the duplication of the key (-4) intentional?

trylek
trylek reviewed Sep 2, 2021
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This mostly looks great to me, I believe I spotted a small copy & paste bug and I hope for feedback from Michal regarding the ABI but I guess you're the one who knows where this information is used. Thank you!

docs/design/specs/PE-COFF.md Show resolved Hide resolved
src/coreclr/tools/aot/ILCompiler.Diagnostics/PerfMapWriter.cs Outdated Show resolved Hide resolved
src/coreclr/tools/aot/ILCompiler.ReadyToRun/CodeGen/ReadyToRunObjectWriter.cs Outdated Show resolved Hide resolved
src/coreclr/tools/aot/ILCompiler.ReadyToRun/CodeGen/ReadyToRunObjectWriter.cs Show resolved Hide resolved
...tools/aot/ILCompiler.ReadyToRun/Compiler/DependencyAnalysis/ReadyToRun/DebugDirectoryNode.cs Outdated Show resolved Hide resolved
src/coreclr/tools/r2rdump/R2RDump.cs Show resolved Hide resolved
@runfoapp runfoapp bot mentioned this pull request Sep 3, 2021
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davidwrighton
davidwrighton requested changes Sep 3, 2021
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Please do not attempt to stabilize any constants in the typesystem proper. That is not the appopriate place for stable constants.

src/coreclr/tools/Common/TypeSystem/Common/TargetArchitecture.cs Outdated Show resolved Hide resolved
src/coreclr/tools/Common/TypeSystem/Common/TargetDetails.cs Outdated Show resolved Hide resolved
src/coreclr/tools/Common/TypeSystem/Common/TargetDetails.cs Outdated Show resolved Hide resolved
src/coreclr/tools/aot/ILCompiler.Diagnostics/PerfMapWriter.cs Show resolved Hide resolved
@karelz karelz mentioned this pull request Sep 6, 2021
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@hoyosjs hoyosjs marked this pull request as ready for review September 9, 2021 05:32
@hoyosjs
Enhance CrossGen2 to emit PerfMap debug directory entry
42fc682 
This is used to correlate PE's with their corresponding PerfMaps. For example the header in the perfmap could be:
```
FFFFFFFF 00 026D4D21B3EE3D93843FF7A964235822
FFFFFFFE 00 1
FFFFFFFD 00 1
FFFFFFFC 00 3
FFFFFFFB 00 1
```
And the PE will have the corresponding entries in the PE as:
```
PerfMap (Type 21):
        System.Private.CoreLib.ni.r2rmap, Signature = 026d4d21b3ee3d93843ff7a964235822, Version = 1
```
@hoyosjs
Emit headers for debug directory entries from the nodes themselves.
de38fc0
@hoyosjs
Add PerfMap Debug Directory Entry spec
72a5289
@hoyosjs
Extend perfmap and r2r documentation
7adb893
@hoyosjs hoyosjs mentioned this pull request Sep 10, 2021
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@hoyosjs hoyosjs merged commit 561f89a into dotnet:main Sep 10, 2021
@hoyosjs hoyosjs deleted the juhoyosa/fix-r2rmap-guid branch September 10, 2021 20:19
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@davidwrighton davidwrighton davidwrighton approved these changes

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