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[DirectX] Add extract-section to llvm-objcopy and implement it for DXContainer #154804

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Merged
merged 20 commits into from
Sep 9, 2025
Merged

[DirectX] Add extract-section to llvm-objcopy and implement it for DXContainer #154804

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350d36a
add common option `extract-section`
inbelic Aug 21, 2025
86160db
add support for `extract-section` for `dxcontainer`
inbelic Aug 12, 2025
c4810e6
add basic test cases
inbelic Aug 12, 2025
8b733cc
comment touch up
inbelic Aug 21, 2025
2129aed
add failure testcase
inbelic Aug 14, 2025
fcf5316
actually enable option for DXContainer
inbelic Aug 21, 2025
a6bf6cc
self-review: no need to alloc
inbelic Aug 21, 2025
7baf785
clang-format
inbelic Aug 21, 2025
40d7e57
review: alphabetical order
inbelic Sep 1, 2025
6d92ea4
review: add ELF block to denote unhandled option
inbelic Sep 1, 2025
a795ac7
review: add option docs
inbelic Sep 1, 2025
2792bd0
review: rename tests
inbelic Sep 1, 2025
bb336c9
self-review: misc
inbelic Sep 1, 2025
9197d82
review: fix up comments
inbelic Sep 4, 2025
2bc1450
review: improve testing readability and strictness
inbelic Sep 4, 2025
be61cae
review: hande extract before any removal
inbelic Sep 4, 2025
b9f6e08
review: add test for invalid format err
inbelic Sep 4, 2025
f3ce155
review: improve test readability and flexibility
inbelic Sep 4, 2025
00627a4
review: clean up test cases
inbelic Sep 5, 2025
b689569
Merge branch 'main' into inbelic/dx-objcopy-extract
inbelic Sep 8, 2025
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3 changes: 0 additions & 3 deletions llvm/docs/CommandGuide/llvm-objcopy.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -88,9 +88,6 @@ multiple file formats.
operations will still be performed. No operations are performed on the sections
prior to dumping them.

For MachO objects, ``<section>`` must be formatted as
``<segment name>,<section name>``.

.. option:: --globalize-symbol <symbol>

Mark any defined symbols named ``<symbol>`` as global symbols in the output.
Expand Down
19 changes: 10 additions & 9 deletions llvm/lib/ObjCopy/DXContainer/DXContainerObjcopy.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -43,15 +43,7 @@ static Error extractPartAsObject(StringRef PartName, StringRef OutFilename,
}

static Error handleArgs(const CommonConfig &Config, Object &Obj) {
std::function<bool(const Part &)> RemovePred = [](const Part &) {
return false;
};

if (!Config.ToRemove.empty())
RemovePred = [&Config](const Part &P) {
return Config.ToRemove.matches(P.Name);
};

// Extract all sections before any modifications.
for (StringRef Flag : Config.ExtractSection) {
StringRef SectionName;
StringRef FileName;
Expand All @@ -61,6 +53,15 @@ static Error handleArgs(const CommonConfig &Config, Object &Obj) {
return E;
}

std::function<bool(const Part &)> RemovePred = [](const Part &) {
return false;
};

if (!Config.ToRemove.empty())
RemovePred = [&Config](const Part &P) {
return Config.ToRemove.matches(P.Name);
};

if (auto E = Obj.removeParts(RemovePred))
return E;

Expand Down
247 changes: 27 additions & 220 deletions llvm/test/tools/llvm-objcopy/DXContainer/extract-section-basic.test
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Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
## Tests that a separate DXContainer is created for the RTS0 (root signature)
## part, specified with --extract-section specified
## part, when--extract-section is specified.

# RUN: yaml2obj %s -o %t
# RUN: llvm-objcopy %t --extract-section=RTS0=%t.rts0.out
Expand All @@ -10,250 +10,57 @@
## `clang-dxc -T cs_6_7 test.hlsl /Fo temp.dxo`
## `obj2yaml temp.dxo`

## and has the DXIL section trimmed for readability.

## ``` test.hlsl
## [RootSignature("")]
## [numthreads(1,1,1)]
## void main() {}
## ```

# CHECK: Header:
# CHECK-NEXT: Hash:
# CHECK: Version:
# CHECK-NEXT: Major: 1
# CHECK-NEXT: Minor: 0
# CHECK-NEXT: FileSize: 68
# CHECK-NEXT: PartCount: 1
# CHECK-NEXT: PartOffsets: [ 36 ]
# CHECK-NEXT: Parts:
# CHECK-NOT: - Name: {{DXIL|SFI0|HASH|ISG1|OSG1|PSV0}}
# CHECK: Name: RTS0
# CHECK-NEXT Size: 24
# CHECK-NEXT RootSignature:
# CHECK-NEXT Version: 2
# CHECK-NEXT NumRootParameters: 0
# CHECK-NEXT RootParametersOffset: 24
# CHECK-NEXT NumStaticSamplers: 0
# CHECK-NEXT StaticSamplersOffset: 24
# CHECK-NEXT Parameters: []
# CHECK-NOT: - Name: {{DXIL|SFI0|HASH|ISG1|OSG1|PSV0}}

--- !dxcontainer
Header:
Hash: [ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0, 0x0, 0x0, 0x0, 0x0 ]
Version:
Major: 1
Minor: 0
# CHECK: FileSize: 68
FileSize: 1984
# CHECK-NEXT: PartCount: 1
# CHECK-NEXT: PartOffsets: [ 36 ]
PartCount: 7
PartOffsets: [ 60, 1792, 1808, 1836, 1852, 1868, 1900 ]
# CHECK-NEXT: Parts:
Parts:
# CHECK-NOT: DXIL
# CHECK-NOT: SFI0
# CHECK-NOT: HASH
# CHECK-NOT: ISG1
# CHECK-NOT: OSG1
# CHECK: Name: RTS0
# CHECK-NOT: PSV0
- Name: DXIL
Size: 1724
Program:
MajorVersion: 6
MinorVersion: 7
ShaderKind: 5
Size: 431
Size: 28
DXILMajorVersion: 1
DXILMinorVersion: 7
DXILSize: 1700
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0xE, 0x84, 0x86, 0xC6, 0xCC, 0xC6, 0x86, 0x4C,
0xC, 0x87, 0x6C, 0xEC, 0x26, 0x67, 0x46, 0x26,
0x67, 0x6C, 0xA6, 0xCC, 0x66, 0x8C, 0xC6, 0x2C,
0xEC, 0x26, 0xC, 0x26, 0x2C, 0xEC, 0x26, 0xCC,
0xCC, 0x86, 0x6, 0xE6, 0x6, 0x26, 0xE7, 0x86,
0xE6, 0x26, 0xE5, 0x8, 0x63, 0x73, 0x87, 0x68,
0xB, 0x4B, 0x73, 0x3B, 0xCA, 0xDD, 0x18, 0x5A,
0x98, 0xDC, 0xD7, 0x5C, 0x9A, 0x5E, 0xD9, 0x69,
0xCC, 0xE4, 0xC2, 0xDA, 0xCA, 0x5A, 0xE0, 0xDE,
0xD2, 0xDC, 0xE8, 0xCA, 0xE4, 0x86, 0x20, 0x1C,
0xC1, 0x10, 0x84, 0x43, 0x18, 0x82, 0x70, 0xC,
0x43, 0x10, 0xE, 0x62, 0x8, 0x42, 0x1, 0xC, 0x41,
0x38, 0x8A, 0x21, 0x8, 0x87, 0x31, 0x6, 0xC1,
0x38, 0xC6, 0x10, 0x4, 0x63, 0x18, 0x4, 0x24,
0x19, 0x83, 0x60, 0x24, 0x63, 0x18, 0xC, 0xC3,
0x18, 0x83, 0xB0, 0x44, 0x63, 0x28, 0x94, 0x1,
0x0, 0xA4, 0x31, 0xC, 0x6, 0xB1, 0x8C, 0x61, 0x60,
0xA, 0xC6, 0x24, 0x64, 0x78, 0x2E, 0x76, 0x61,
0x6C, 0x76, 0x65, 0x72, 0x43, 0x9, 0x18, 0xA3,
0xB0, 0xB1, 0xD9, 0xB5, 0xB9, 0xA4, 0x91, 0x95,
0xB9, 0xD1, 0xD, 0x25, 0x68, 0x8C, 0x43, 0x86,
0xE7, 0x32, 0x87, 0x16, 0x46, 0x56, 0x26, 0xD7,
0xF4, 0x46, 0x56, 0xC6, 0x36, 0x94, 0xC0, 0x31,
0xA, 0x19, 0x9E, 0x8B, 0x5D, 0x99, 0xDC, 0x5C,
0xDA, 0x9B, 0xDB, 0x50, 0x82, 0xC7, 0x38, 0x64,
0x78, 0x2E, 0x65, 0x6E, 0x74, 0x72, 0x79, 0x50,
0x6F, 0x69, 0x6E, 0x74, 0x73, 0x43, 0x9, 0x24,
0x13, 0xB1, 0xB1, 0xD9, 0xB5, 0xB9, 0xB4, 0xBD,
0x91, 0xD5, 0xB1, 0x95, 0xB9, 0x98, 0xB1, 0x85,
0x9D, 0xCD, 0xD, 0x45, 0x98, 0x28, 0x0, 0x0, 0x71,
0x20, 0x0, 0x0, 0x2, 0x0, 0x0, 0x0, 0x6, 0x40,
0x30, 0x0, 0xD2, 0x0, 0x0, 0x0, 0x61, 0x20, 0x0,
0x0, 0x6, 0x0, 0x0, 0x0, 0x13, 0x4, 0x1, 0x86,
0x3, 0x1, 0x0, 0x0, 0x2, 0x0, 0x0, 0x0, 0x7, 0x50,
0x10, 0xCD, 0x14, 0x61, 0x0, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0, 0x0, 0x0, 0x0 ]
DXILSize: 4
DXIL: [ 0x42, 0x43, 0xC0, 0xDE, ]
- Name: SFI0
Size: 8
- Name: HASH
Expand Down
25 changes: 22 additions & 3 deletions llvm/test/tools/llvm-objcopy/DXContainer/extract-section-errs.test
View file
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Original file line number Diff line number Diff line change
@@ -1,7 +1,7 @@
## Check that llvm-objcopy reports a suitable error when it
## can't find the section to extract
## Check that llvm-objcopy reports a suitable error when it can't find the
## section to extract.

## We can't extract a part that doesn't exist
## We can't extract a part that doesn't exist.
# RUN: yaml2obj %s --docnum=1 -o %t1
# RUN: not llvm-objcopy %t1 --extract-section=UNKNOWN=%t.unknown.out 2>&1 | FileCheck %s -DFILE=%t1 --check-prefix=ERROR1

Expand All @@ -19,3 +19,22 @@ Parts:
- Name: FKE0
Size: 8
...

## We can't extract a part that is specified incorrectly.
# RUN: yaml2obj %s --docnum=2 -o %t2
# RUN: not llvm-objcopy %t2 --extract-section=FKE0,%t.fke0.out 2>&1 | FileCheck %s -DFILE=%t2 --check-prefix=ERROR2

# ERROR2: error: bad format for --extract-section, expected section=file

--- !dxcontainer
Header:
Hash: [ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0, 0x0, 0x0, 0x0, 0x0 ]
Version:
Major: 1
Minor: 0
PartCount: 1
Parts:
- Name: FKE0
Size: 8
...
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