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llvm-dwarfdump: support a --show-children option 

This will print all children of a DIE when selectively printing only
one DIE at a given offset.

llvm-svn: 313464
This commit is contained in:
Adrian Prantl 2017-09-16 17:28:00 +00:00
parent 099d7e452a
commit 597aa48d11
5 changed files with 34 additions and 3 deletions
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1
llvm/include/llvm/DebugInfo/DIContext.h
View File

@ -139,6 +139,7 @@ enum DIDumpType : unsigned {
struct DIDumpOptions {
unsigned DumpType = DIDT_All;
bool DumpEH = false;
bool ShowChildren = false;
bool SummarizeTypes = false;
bool Verbose = false;
};

6
llvm/lib/DebugInfo/DWARF/DWARFContext.cpp
View File

@ -223,6 +223,8 @@ void DWARFContext::dump(
Optional<uint64_t> DumpOffset;
uint64_t DumpType = DumpOpts.DumpType;
bool DumpEH = DumpOpts.DumpEH;
unsigned RecDepth =
DumpOpts.ShowChildren ? std::numeric_limits<unsigned>::max() : 0;
StringRef Extension = sys::path::extension(DObj->getFileName());
bool IsDWO = (Extension == ".dwo") || (Extension == ".dwp");
@ -260,7 +262,7 @@ void DWARFContext::dump(
if (shouldDump(IsExplicit, Name, DIDT_ID_DebugInfo, Section.Data)) {
for (const auto &CU : CUs)
if (DumpOffset)
CU->getDIEForOffset(DumpOffset.getValue()).dump(OS, 0);
CU->getDIEForOffset(DumpOffset.getValue()).dump(OS, RecDepth);
else
CU->dump(OS, DumpOpts);
}
@ -277,7 +279,7 @@ void DWARFContext::dump(
for (const auto &TUS : TUSections)
for (const auto &TU : TUS)
if (DumpOffset)
TU->getDIEForOffset(*DumpOffset).dump(OS, 0);
TU->getDIEForOffset(*DumpOffset).dump(OS, RecDepth);
else
TU->dump(OS, DumpOpts);
};

14
llvm/test/tools/llvm-dwarfdump/X86/debug_info_offset.test
View File

@ -6,5 +6,17 @@ CHECK: DW_AT_name
CHECK-NOT: {{:}}
RUN: llvm-mc %S/brief.s -filetype obj -triple x86_64-apple-darwin -o - \
RUN: | llvm-dwarfdump -debug-info=0 - | FileCheck --allow-empty --check-prefix=EMPTY %s
RUN: | llvm-dwarfdump -debug-info=0 - \
RUN: | FileCheck --allow-empty --check-prefix=EMPTY %s
EMPTY-NOT: DW_TAG
RUN: llvm-mc %S/brief.s -filetype obj -triple x86_64-apple-darwin -o - \
RUN: | llvm-dwarfdump -debug-info=0x0000000b -c - \
RUN: | FileCheck %s --check-prefix=CHILDREN
UN: llvm-mc %S/brief.s -filetype obj -triple x86_64-apple-darwin -o - \
UN: | llvm-dwarfdump -debug-info=0x0000000b --show-children - \
UN: | FileCheck %s --check-prefix=CHILDREN
CHILDREN: .debug_info contents:
CHILDREN: 0x0000000b: DW_TAG_compile_unit
CHILDREN: DW_TAG_subprogram

9
llvm/test/tools/llvm-dwarfdump/X86/debug_type_offset.test
View File

@ -6,3 +6,12 @@ CHECK: .debug_types contents:
CHECK: 0x00000019: DW_TAG_structure_type
CHECK: DW_AT_visibility
CHECK-NOT: {{:}}
RUN: llvm-mc %S/../../../DebugInfo/Inputs/typeunit-header.s -filetype obj \
RUN: -triple x86_64-unknown-elf -o - \
RUN: | llvm-dwarfdump -c -debug-types=0x0000017 - \
RUN: | FileCheck %s --check-prefix=CHILDREN
CHILDREN: .debug_types contents:
CHILDREN: 0x00000017: DW_TAG_type_unit
CHILDREN: 0x00000019: DW_TAG_structure_type
CHECK-NOT: {{:}}

7
llvm/tools/llvm-dwarfdump/llvm-dwarfdump.cpp
View File

@ -126,6 +126,12 @@ static opt<bool> DumpUUID("uuid", desc("Show the UUID for each architecture"),
cat(DwarfDumpCategory));
static alias DumpUUIDAlias("u", desc("Alias for -uuid"), aliasopt(DumpUUID));
static opt<bool>
ShowChildren("show-children",
desc("Show a debug info entry's children when selectively "
"printing with the =<Offset> option"));
static alias ShowChildrenAlias("c", desc("Alias for -show-children"),
aliasopt(ShowChildren));
static opt<bool>
SummarizeTypes("summarize-types",
desc("Abbreviate the description of type unit entries"));
@ -153,6 +159,7 @@ static void error(StringRef Filename, std::error_code EC) {
static DIDumpOptions getDumpOpts() {
DIDumpOptions DumpOpts;
DumpOpts.DumpType = DumpType;
DumpOpts.ShowChildren = ShowChildren;
DumpOpts.SummarizeTypes = SummarizeTypes;
DumpOpts.Verbose = Verbose;
return DumpOpts;