.. code-block:: llvm
; Function Attrs: nounwind ssp uwtable
- define void @foo() #0 {
+ define void @foo() #0 !dbg !4 {
entry:
%X = alloca i32, align 4
%Y = alloca i32, align 4
!1 = !DIFile(filename: "/dev/stdin", directory: "/Users/dexonsmith/data/llvm/debug-info")
!2 = !{}
!3 = !{!4}
- !4 = !DISubprogram(name: "foo", scope: !1, file: !1, line: 1, type: !5, isLocal: false, isDefinition: true, scopeLine: 1, isOptimized: false, function: void ()* @foo, variables: !2)
+ !4 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 1, type: !5, isLocal: false, isDefinition: true, scopeLine: 1, isOptimized: false, variables: !2)
!5 = !DISubroutineType(types: !6)
!6 = !{null}
!7 = !{i32 2, !"Dwarf Version", i32 2}
.. code-block:: llvm
!14 = !DILocation(line: 2, column: 9, scope: !4)
- !4 = !DISubprogram(name: "foo", scope: !1, file: !1, line: 1, type: !5,
- isLocal: false, isDefinition: true, scopeLine: 1,
- isOptimized: false, function: void ()* @foo,
- variables: !2)
+ !4 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 1, type: !5,
+ isLocal: false, isDefinition: true, scopeLine: 1,
+ isOptimized: false, variables: !2)
Here ``!14`` is metadata providing `location information
<LangRef.html#dilocation>`_. In this example, scope is encoded by ``!4``, a
``llvm::Instruction`` provides easy access to metadata attached with an
instruction. One can extract line number information encoded in LLVM IR using
-``Instruction::getMetadata()`` and ``DILocation::getLineNumber()``.
+``Instruction::getDebugLoc()`` and ``DILocation::getLine()``.
.. code-block:: c++
- if (MDNode *N = I->getMetadata("dbg")) { // Here I is an LLVM instruction
- DILocation Loc(N); // DILocation is in DebugInfo.h
- unsigned Line = Loc.getLineNumber();
- StringRef File = Loc.getFilename();
- StringRef Dir = Loc.getDirectory();
+ if (DILocation *Loc = I->getDebugLoc()) { // Here I is an LLVM instruction
+ unsigned Line = Loc->getLine();
+ StringRef File = Loc->getFilename();
+ StringRef Dir = Loc->getDirectory();
}
C/C++ global variable information
!4 = !DISubprogram(name: "main", scope: !1, file: !1, line: 1, type: !5,
isLocal: false, isDefinition: true, scopeLine: 1,
flags: DIFlagPrototyped, isOptimized: false,
- function: i32 (i32, i8**)* @main, variables: !2)
+ variables: !2)
;;
;; Define the subprogram itself.
;;
- define i32 @main(i32 %argc, i8** %argv) {
+ define i32 @main(i32 %argc, i8** %argv) !dbg !4 {
...
}
"``a::b::c``". So the name entered in the name table must be demangled in
order to chop it up appropriately and additional names must be manually entered
into the table to make it effective as a name lookup table for debuggers to
-se.
+use.
All debuggers currently ignore the "``.debug_pubnames``" table as a result of
its inconsistent and useless public-only name content making it a waste of