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DebugInfo/DWARF: Pretty print subroutine types

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Doesn't handle varargs and other fun things, but it's a start. (also
doesn't print these strictly as valid C++ when it's a pointer to
function, it'll print as "void(int)*" instead of "void (*)(int)")

llvm-svn: 348965
This commit is contained in:
David Blaikie 2018-12-12 19:53:03 +00:00
parent 2405f803ac
commit 7510fbd080
2 changed files with 64 additions and 2 deletions
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21
lib/DebugInfo/DWARF/DWARFDie.cpp
View File

@ -173,17 +173,34 @@ static void dumpTypeName(raw_ostream &OS, const DWARFDie &D) {
case DW_TAG_ptr_to_member_type:
case DW_TAG_reference_type:
case DW_TAG_rvalue_reference_type:
case DW_TAG_subroutine_type:
break;
default:
dumpTypeTagName(OS, T);
}
// Follow the DW_AT_type if possible.
dumpTypeName(OS, D.getAttributeValueAsReferencedDie(DW_AT_type));
DWARFDie TypeDie = D.getAttributeValueAsReferencedDie(DW_AT_type);
dumpTypeName(OS, TypeDie);
switch (T) {
case DW_TAG_subroutine_type: {
if (!TypeDie)
OS << "void";
OS << '(';
bool First = true;
for (const DWARFDie &C : D.children()) {
if (C.getTag() == DW_TAG_formal_parameter) {
if (!First)
OS << ", ";
First = false;
dumpTypeName(OS, C.getAttributeValueAsReferencedDie(DW_AT_type));
}
}
OS << ')';
break;
}
case DW_TAG_array_type: {
Optional<uint64_t> Bound;
for (const DWARFDie &C : D.children())
if (C.getTag() == DW_TAG_subrange_type) {

45
test/tools/llvm-dwarfdump/X86/prettyprint_types.s
View File

@ -22,6 +22,10 @@
# Testing lower_bound, upper_bound, lower and upper, lower and count, and count separately.
# CHECK: DW_AT_type{{.*}}"int[1-][2][1-2][1-3][2]"
# subroutine types
# CHECK: DW_AT_type{{.*}}"int()"
# CHECK: DW_AT_type{{.*}}"void(int)"
# CHECK: DW_AT_type{{.*}}"void(int, int)"
.section .debug_str,"MS",@progbits,1
.Lint_name:
.asciz "int"
@ -132,6 +136,25 @@
.byte 14 # DW_FORM_strp
.byte 0 # EOM(1)
.byte 0 # EOM(2)
.byte 15 # Abbreviation Code
.byte 0x15 # DW_TAG_subroutine_type
.byte 0 # DW_CHILDREN_no
.byte 73 # DW_AT_type
.byte 19 # DW_FORM_ref4
.byte 0 # EOM(1)
.byte 0 # EOM(2)
.byte 16 # Abbreviation Code
.byte 0x15 # DW_TAG_subroutine_type
.byte 1 # DW_CHILDREN_yes
.byte 0 # EOM(1)
.byte 0 # EOM(2)
.byte 17 # Abbreviation Code
.byte 0x5 # DW_TAG_formal_parameter
.byte 0 # DW_CHILDREN_no
.byte 73 # DW_AT_type
.byte 19 # DW_FORM_ref4
.byte 0 # EOM(1)
.byte 0 # EOM(2)
.byte 0 # EOM(3)
.section .debug_info,"",@progbits
.Lcu_begin:
@ -177,6 +200,22 @@
.byte 13 # DW_AT_subrange_type
.byte 2 # DW_AT_count
.byte 0 # End Of Children Mark
.Lsub_int_empty_type:
.byte 15 # DW_TAG_subroutine_type
.long .Lint_type - .Lcu_begin # DW_AT_type
.Lsub_void_int_type:
.byte 16 # DW_TAG_subroutine_type
.byte 17 # DW_TAG_formal_parameter
.long .Lint_type - .Lcu_begin # DW_AT_type
.byte 0 # End Of Children Mark
.Lsub_void_int_int_type:
.byte 16 # DW_TAG_subroutine_type
.byte 17 # DW_TAG_formal_parameter
.long .Lint_type - .Lcu_begin # DW_AT_type
.byte 17 # DW_TAG_formal_parameter
.long .Lint_type - .Lcu_begin # DW_AT_type
.byte 0 # End Of Children Mark
.byte 3 # DW_TAG_variable
.long .Lint_type - .Lcu_begin # DW_AT_type
.byte 3 # DW_TAG_variable
@ -189,5 +228,11 @@
.long .Lptr_to_member_type - .Lcu_begin # DW_AT_type
.byte 3 # DW_TAG_variable
.long .Larray_type - .Lcu_begin # DW_AT_type
.byte 3 # DW_TAG_variable
.long .Lsub_int_empty_type - .Lcu_begin # DW_AT_type
.byte 3 # DW_TAG_variable
.long .Lsub_void_int_type - .Lcu_begin # DW_AT_type
.byte 3 # DW_TAG_variable
.long .Lsub_void_int_int_type - .Lcu_begin # DW_AT_type
.byte 0 # End Of Children Mark
.Lunit_end: