[llvm][dwarfdump] Show name of referenced DW_TAG_APPLE_property #165537
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@llvm/pr-subscribers-debuginfo Author: Michael Buch (Michael137) ChangesThis patch makes Before: After: Full diff: https://github.com/llvm/llvm-project/pull/165537.diff 2 Files Affected:
diff --git a/llvm/lib/DebugInfo/DWARF/DWARFDie.cpp b/llvm/lib/DebugInfo/DWARF/DWARFDie.cpp
index db5cc37c93f90..94da588c439d4 100644
--- a/llvm/lib/DebugInfo/DWARF/DWARFDie.cpp
+++ b/llvm/lib/DebugInfo/DWARF/DWARFDie.cpp
@@ -129,6 +129,25 @@ prettyLanguageVersionString(const DWARFAttribute &AttrValue,
static_cast<SourceLanguageName>(*LName), *LVersion);
}
+static llvm::Expected<llvm::StringRef>
+getApplePropertyName(const DWARFDie &PropDIE) {
+ if (!PropDIE)
+ return llvm::createStringError("invalid DIE");
+
+ if (PropDIE.getTag() != DW_TAG_APPLE_property)
+ return llvm::createStringError("referencing not a DW_TAG_APPLE_property");
+
+ auto PropNameForm = PropDIE.find(DW_AT_APPLE_property_name);
+ if (!PropNameForm)
+ return "";
+
+ auto NameOrErr = PropNameForm->getAsCString();
+ if (!NameOrErr)
+ return NameOrErr.takeError();
+
+ return *NameOrErr;
+}
+
static void dumpAttribute(raw_ostream &OS, const DWARFDie &Die,
const DWARFAttribute &AttrValue, unsigned Indent,
DIDumpOptions DumpOpts) {
@@ -233,6 +252,15 @@ static void dumpAttribute(raw_ostream &OS, const DWARFDie &Die,
Die.getAttributeValueAsReferencedDie(FormValue).getName(
DINameKind::LinkageName))
OS << Space << "\"" << Name << '\"';
+ } else if (Attr == DW_AT_APPLE_property) {
+ auto PropDIE = Die.getAttributeValueAsReferencedDie(FormValue);
+ if (auto PropNameOrErr = getApplePropertyName(PropDIE))
+ OS << Space << "\"" << *PropNameOrErr << '\"';
+ else
+ DumpOpts.RecoverableErrorHandler(createStringError(
+ errc::invalid_argument,
+ llvm::formatv("decoding DW_AT_APPLE_property_name: {}",
+ toString(PropNameOrErr.takeError()))));
} else if (Attr == DW_AT_type || Attr == DW_AT_containing_type) {
DWARFDie D = resolveReferencedType(Die, FormValue);
if (D && !D.isNULL()) {
diff --git a/llvm/test/tools/llvm-dwarfdump/AArch64/DW_AT_APPLE_property.s b/llvm/test/tools/llvm-dwarfdump/AArch64/DW_AT_APPLE_property.s
new file mode 100644
index 0000000000000..416ad352c2254
--- /dev/null
+++ b/llvm/test/tools/llvm-dwarfdump/AArch64/DW_AT_APPLE_property.s
@@ -0,0 +1,126 @@
+# Checks that we correctly display the DW_AT_APPLE_property_name of a
+# referenced DW_TAG_APPLE_property.
+#
+# RUN: llvm-mc -triple=aarch64--darwin -filetype=obj -o %t.o < %s
+# RUN: not llvm-dwarfdump %t.o 2> %t.errs.txt | FileCheck %s
+# RUN: FileCheck %s --check-prefix=ERRORS < %t.errs.txt
+
+# CHECK: 0x[[PROP_REF:[0-9a-f]+]]: DW_TAG_APPLE_property
+# CHECK-NEXT: DW_AT_APPLE_property_name ("autoSynthProp")
+#
+# CHECK: 0x[[NO_NAME_PROP:[0-9a-f]+]]: DW_TAG_APPLE_property
+# CHECK-NOT: DW_AT_APPLE_property_name
+#
+# CHECK: 0x[[INVALID_STRP:[0-9a-f]+]]: DW_TAG_APPLE_property
+# CHECK-NEXT: DW_AT_APPLE_property_name
+#
+# CHECK: DW_TAG_member
+# CHECK: DW_AT_APPLE_property (0x[[PROP_REF]] "autoSynthProp")
+# CHECK: DW_AT_APPLE_property (0x[[NO_NAME_PROP]] "")
+# CHECK: DW_AT_APPLE_property (0x{{.*}})
+# CHECK: DW_AT_APPLE_property (0x{{.*}})
+# CHECK: DW_AT_APPLE_property (0x[[INVALID_STRP]])
+
+# ERRORS: error: decoding DW_AT_APPLE_property_name: referencing not a DW_TAG_APPLE_property
+# ERRORS: error: decoding DW_AT_APPLE_property_name: invalid DIE
+# ERRORS: error: decoding DW_AT_APPLE_property_name: DW_FORM_strp offset 102 is beyond .debug_str bounds
+
+ .section __DWARF,__debug_abbrev,regular,debug
+Lsection_abbrev:
+ .byte 1 ; Abbreviation Code
+ .byte 17 ; DW_TAG_compile_unit
+ .byte 1 ; DW_CHILDREN_yes
+ .byte 114 ; DW_AT_str_offsets_base
+ .byte 23 ; DW_FORM_sec_offset
+ .byte 0 ; EOM(1)
+ .byte 0 ; EOM(2)
+ .byte 2 ; Abbreviation Code
+ .byte 19 ; DW_TAG_structure_type
+ .byte 1 ; DW_CHILDREN_yes
+ .byte 3 ; DW_AT_name
+ .byte 37 ; DW_FORM_strx1
+ .byte 0 ; EOM(1)
+ .byte 0 ; EOM(2)
+ .byte 3 ; Abbreviation Code
+ .ascii "\200\204\001" ; DW_TAG_APPLE_property
+ .byte 0 ; DW_CHILDREN_no
+ .ascii "\350\177" ; DW_AT_APPLE_property_name
+ .byte 37 ; DW_FORM_strx1
+ .byte 0 ; EOM(1)
+ .byte 0 ; EOM(2)
+ .byte 4 ; Abbreviation Code
+ .ascii "\200\204\001" ; DW_TAG_APPLE_property
+ .byte 0 ; DW_CHILDREN_no
+ .byte 0 ; EOM(1)
+ .byte 0 ; EOM(2)
+ .byte 5 ; Abbreviation Code
+ .ascii "\200\204\001" ; DW_TAG_APPLE_property
+ .byte 0 ; DW_CHILDREN_no
+ .ascii "\350\177" ; DW_AT_APPLE_property_name
+ .byte 14 ; DW_FORM_strp
+ .byte 0 ; EOM(1)
+ .byte 0 ; EOM(2)
+ .byte 6 ; Abbreviation Code
+ .byte 13 ; DW_TAG_member
+ .byte 0 ; DW_CHILDREN_no
+ .byte 3 ; DW_AT_name
+ .byte 37 ; DW_FORM_strx1
+ .ascii "\355\177" ; DW_AT_APPLE_property
+ .byte 19 ; DW_FORM_ref4
+ .ascii "\355\177" ; DW_AT_APPLE_property
+ .byte 19 ; DW_FORM_ref4
+ .ascii "\355\177" ; DW_AT_APPLE_property
+ .byte 19 ; DW_FORM_ref4
+ .ascii "\355\177" ; DW_AT_APPLE_property
+ .byte 19 ; DW_FORM_ref4
+ .ascii "\355\177" ; DW_AT_APPLE_property
+ .byte 19 ; DW_FORM_ref4
+ .byte 0 ; EOM(1)
+ .byte 0 ; EOM(2)
+ .byte 0 ; EOM(3)
+ .section __DWARF,__debug_info,regular,debug
+Lsection_info:
+Lcu_begin0:
+Lset0 = Ldebug_info_end0-Ldebug_info_start0 ; Length of Unit
+ .long Lset0
+Ldebug_info_start0:
+ .short 5 ; DWARF version number
+ .byte 1 ; DWARF Unit Type
+ .byte 8 ; Address Size (in bytes)
+Lset1 = Lsection_abbrev-Lsection_abbrev ; Offset Into Abbrev. Section
+ .long Lset1
+ .byte 1 ; Abbrev [1] DW_TAG_compile_unit
+Lset2 = Lstr_offsets_base0-Lsection_str_off ; DW_AT_str_offsets_base
+ .long Lset2
+ .byte 2 ; Abbrev [2] DW_TAG_structure_type
+ .byte 2 ; DW_AT_name
+ .byte 3 ; Abbrev [3] DW_TAG_APPLE_property
+ .byte 0 ; DW_AT_APPLE_property_name
+ .byte 4 ; Abbrev [4] DW_TAG_APPLE_property
+ .byte 5 ; Abbrev [5] DW_TAG_APPLE_property
+ .long 102 ; DW_AT_APPLE_property_name
+ .byte 6 ; Abbrev [6] DW_TAG_member
+ .byte 1 ; DW_AT_name
+ .long 19 ; DW_AT_APPLE_property
+ .long 21 ; DW_AT_APPLE_property
+ .long 17 ; DW_AT_APPLE_property
+ .long 0 ; DW_AT_APPLE_property
+ .long 22 ; DW_AT_APPLE_property
+ .byte 0 ; End Of Children Mark
+ .byte 0 ; End Of Children Mark
+Ldebug_info_end0:
+ .section __DWARF,__debug_str_offs,regular,debug
+Lsection_str_off:
+ .long 16 ; Length of String Offsets Set
+ .short 5
+ .short 0
+Lstr_offsets_base0:
+ .section __DWARF,__debug_str,regular,debug
+Linfo_string:
+ .asciz "autoSynthProp" ; string offset=0
+ .asciz "_var" ; string offset=14
+ .asciz "Foo" ; string offset=19
+ .section __DWARF,__debug_str_offs,regular,debug
+ .long 0
+ .long 14
+ .long 19
|
|
✅ With the latest revision this PR passed the C/C++ code formatter. |
dwblaikie
approved these changes
Oct 30, 2025
| return llvm::createStringError("invalid DIE"); | ||
|
|
||
| if (PropDIE.getTag() != DW_TAG_APPLE_property) | ||
| return llvm::createStringError("referencing not a DW_TAG_APPLE_property"); |
There was a problem hiding this comment.
nit:
Suggested change
| return llvm::createStringError("referencing not a DW_TAG_APPLE_property"); | |
| return llvm::createStringError("not referencing a DW_TAG_APPLE_property"); |
Michael137
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This patch makes
dwarfdumpshow theDW_AT_APPLE_property_nameof a referencedDW_TAG_APPLE_property(similar to how we show the name of a referencedDW_AT_type). Eventually we'll extend this to the DWARFv6 property tags too.Before:
After: