<div class="doc_author">
<p>Written by <a href="mailto:sabre@nondot.org">Chris Lattner</a>
- and <a href="mailto:jlaskey@apple.com">Jim Laskey</a></p>
+ and <a href="mailto:jlaskey@mac.com">Jim Laskey</a></p>
</div>
numbers. We recommend using with tags in the range 0x1000 thru 0x2000 (there is
a defined enum DW_TAG_user_base = 0x1000.)</p>
-<p>The fields of debug descriptors used internally by LLVM (MachineDebugInfo)
+<p>The fields of debug descriptors used internally by LLVM (MachineModuleInfo)
are restricted to only the simple data types <tt>int</tt>, <tt>uint</tt>,
<tt>bool</tt>, <tt>float</tt>, <tt>double</tt>, <tt>sbyte*</tt> and <tt> { }*
</tt>. References to arbitrary values are handled using a <tt> { }* </tt> and a
loosely bound to the tag values of Dwarf information entries. However, that
does not restrict the use of the information supplied to Dwarf targets. To
facilitate versioning of debug information, the tag is augmented with the
-current debug version (LLVMDebugVersion = 4 << 16 or 0x40000.)</a></p>
+current debug version (LLVMDebugVersion = 4 << 16 or 0x40000 or 262144.)</a></p>
<p>The details of the various descriptors follow.</p>
{ }*, ;; Global variable anchor = cast (%<a href="#format_anchors">llvm.dbg.anchor.type</a>* %<a href="#format_global_variables">llvm.dbg.global_variables</a> to { }*),
{ }*, ;; Reference to context descriptor
sbyte*, ;; Name
+ sbyte*, ;; Display name (fully qualified C++ name)
+ sbyte*, ;; MIPS linkage name (for C++)
{ }*, ;; Reference to compile unit where defined
uint, ;; Line number where defined
{ }*, ;; Reference to type descriptor
{ }*, ;; Subprogram anchor = cast (%<a href="#format_anchors">llvm.dbg.anchor.type</a>* %<a href="#format_subprograms">llvm.dbg.subprograms</a> to { }*),
{ }*, ;; Reference to context descriptor
sbyte*, ;; Name
+ sbyte*, ;; Display name (fully qualified C++ name)
+ sbyte*, ;; MIPS linkage name (for C++)
{ }*, ;; Reference to compile unit where defined
uint, ;; Line number where defined
{ }*, ;; Reference to type descriptor
DW_TAG_structure_type = 19
DW_TAG_union_type = 23
DW_TAG_vector_type = 259
+ DW_TAG_subroutine_type = 46
+ DW_TAG_inheritance = 26
</pre>
<p>The vector flag indicates that an array type is a native packed vector.</p>
or <a href="#format_composite_type">composite</a> type descriptors, each
representing a field member of the structure or union.</p>
+<p>For C++ classes (tag = <tt>DW_TAG_structure_type</tt>), member descriptors
+provide information about base classes, static members and member functions. If
+a member is a <a href="#format_derived_type">derived type descriptor</a> and has
+a tag of <tt>DW_TAG_inheritance</tt>, then the type represents a base class. If
+the member of is a <a href="#format_global_variables">global variable
+descriptor</a> then it represents a static member. And, if the member is a <a
+href="#format_subprograms">subprogram descriptor</a> then it represents a member
+function. For static members and member functions, <tt>getName()</tt> returns
+the members link or the C++ mangled name. <tt>getDisplayName()</tt> the
+simplied version of the name.</p>
+
+<p>The first member of subroutine (tag = <tt>DW_TAG_subroutine_type</tt>)
+type elements is the return type for the subroutine. The remaining
+elements are the formal arguments to the subroutine.</p>
+
<p><a href="#format_composite_type">Composite type</a> location can be
determined from the compile unit and line number. The size, alignment and
offset are expressed in bits and can be 64 bit values. The alignment is used to
{ }* cast (%<a href="#format_anchors">llvm.dbg.anchor.type</a>* %<a href="#format_global_variables">llvm.dbg.global_variables</a> to { }*),
{ }* cast (%<a href="#format_compile_units">llvm.dbg.compile_unit.type</a>* %<a href="#format_compile_units">llvm.dbg.compile_unit</a> to { }*),
sbyte* getelementptr ([9 x sbyte]* %str1, int 0, int 0),
+ sbyte* getelementptr ([1 x sbyte]* %str2, int 0, int 0),
{ }* cast (%<a href="#format_compile_units">llvm.dbg.compile_unit.type</a>* %<a href="#format_compile_units">llvm.dbg.compile_unit</a> to { }*),
uint 1,
{ }* cast (%<a href="#format_basic_type">llvm.dbg.basictype.type</a>* %<a href="#format_basic_type">llvm.dbg.basictype</a> to { }*),
%<a href="#format_basic_type">llvm.dbg.basictype</a> = internal constant %<a href="#format_basic_type">llvm.dbg.basictype.type</a> {
uint add(uint 36, uint 262144),
{ }* cast (%<a href="#format_compile_units">llvm.dbg.compile_unit.type</a>* %<a href="#format_compile_units">llvm.dbg.compile_unit</a> to { }*),
- sbyte* getelementptr ([4 x sbyte]* %str2, int 0, int 0),
+ sbyte* getelementptr ([4 x sbyte]* %str3, int 0, int 0),
{ }* null,
int 0,
uint 32,
;; Define the names of the global variable and basic type.
;;
%str1 = internal constant [9 x sbyte] c"MyGlobal\00", section "llvm.metadata"
-%str2 = internal constant [4 x sbyte] c"int\00", section "llvm.metadata"
+%str2 = internal constant [1 x sbyte] c"\00", section "llvm.metadata"
+%str3 = internal constant [4 x sbyte] c"int\00", section "llvm.metadata"
</pre>
</div>
{ }* cast (%<a href="#format_anchors">llvm.dbg.anchor.type</a>* %<a href="#format_subprograms">llvm.dbg.subprograms</a> to { }*),
{ }* cast (%<a href="#format_compile_units">llvm.dbg.compile_unit.type</a>* %<a href="#format_compile_units">llvm.dbg.compile_unit</a> to { }*),
sbyte* getelementptr ([5 x sbyte]* %str1, int 0, int 0),
+ sbyte* getelementptr ([1 x sbyte]* %str2, int 0, int 0),
{ }* cast (%<a href="#format_compile_units">llvm.dbg.compile_unit.type</a>* %<a href="#format_compile_units">llvm.dbg.compile_unit</a> to { }*),
uint 1,
{ }* null,
;; Define the name of the subprogram.
;;
%str1 = internal constant [5 x sbyte] c"main\00", section "llvm.metadata"
+%str2 = internal constant [1 x sbyte] c"\00", section "llvm.metadata"
;;
;; Define the subprogram itself.
projects / oota-llvm.git / blobdiff