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DWARFDebugLoclists: Move to a incremental parsing model

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Summary:
This patch stems from the discussion D68270 (including some offline
talks). The idea is to provide an "incremental" api for parsing location
lists, which will avoid caching or materializing parsed data. An
additional goal is to provide a high level location list api, which
abstracts the differences between different encoding schemes, and can be
used by users which don't care about those (such as LLDB).

This patch implements the first part. It implements a call-back based
"visitLocationList" api. This function parses a single location list,
calling a user-specified callback for each entry. This is going to be
the base api, which other location list functions (right now, just the
dumping code) are going to be based on.

Future patches will do something similar for the v4 location lists, and
add a mechanism to translate raw entries into concrete address ranges.

Reviewers: dblaikie, probinson, JDevlieghere, aprantl, SouraVX

Subscribers: hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D69672
This commit is contained in:
Pavel Labath
2019-10-31 15:05:33 +01:00
parent bde3293302
commit e1f8c8a16f
11 changed files with 181 additions and 190 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
llvm/include/llvm/DebugInfo/DWARF/DWARFContext.h
View File

@@ -75,7 +75,6 @@ class DWARFContext : public DIContext {
DWARFUnitVector DWOUnits;
std::unique_ptr<DWARFDebugAbbrev> AbbrevDWO;
std::unique_ptr<DWARFDebugLoclists> LocDWO;
/// The maximum DWARF version of all units.
unsigned MaxVersion = 0;
@@ -260,9 +259,6 @@ public:
/// Get a pointer to the parsed dwo abbreviations object.
const DWARFDebugAbbrev *getDebugAbbrevDWO();
/// Get a pointer to the parsed DebugLoc object.
const DWARFDebugLoclists *getDebugLocDWO();
/// Get a pointer to the parsed DebugAranges object.
const DWARFDebugAranges *getDebugAranges();

52
llvm/include/llvm/DebugInfo/DWARF/DWARFDebugLoc.h
View File

@@ -76,6 +76,9 @@ public:
class DWARFDebugLoclists {
public:
// Unconstructible.
DWARFDebugLoclists() = delete;
struct Entry {
uint8_t Kind;
uint64_t Offset;
@@ -87,35 +90,30 @@ public:
DIDumpOptions DumpOpts, unsigned Indent, size_t MaxEncodingStringLength) const;
};
struct LocationList {
uint64_t Offset;
SmallVector<Entry, 2> Entries;
void dump(raw_ostream &OS, uint64_t BaseAddr, bool IsLittleEndian,
unsigned AddressSize, const MCRegisterInfo *RegInfo,
DWARFUnit *U, DIDumpOptions DumpOpts, unsigned Indent) const;
};
/// Call the user-provided callback for each entry (including the end-of-list
/// entry) in the location list starting at \p Offset. The callback can return
/// false to terminate the iteration early. Returns an error if it was unable
/// to parse the entire location list correctly. Upon successful termination
/// \p Offset will be updated point past the end of the list.
static Error visitLocationList(const DWARFDataExtractor &Data,
uint64_t *Offset, uint16_t Version,
llvm::function_ref<bool(const Entry &)> F);
private:
using LocationLists = SmallVector<LocationList, 4>;
/// Dump the location list at the given \p Offset. The function returns true
/// iff it has successfully reched the end of the list. This means that one
/// can attempt to parse another list after the current one (\p Offset will be
/// updated to point past the end of the current list).
static bool dumpLocationList(const DWARFDataExtractor &Data, uint64_t *Offset,
uint16_t Version, raw_ostream &OS,
uint64_t BaseAddr, const MCRegisterInfo *MRI,
DWARFUnit *U, DIDumpOptions DumpOpts,
unsigned Indent);
LocationLists Locations;
unsigned AddressSize;
bool IsLittleEndian;
public:
void parse(const DWARFDataExtractor &data, uint64_t Offset,
uint64_t EndOffset, uint16_t Version);
void dump(raw_ostream &OS, uint64_t BaseAddr, const MCRegisterInfo *RegInfo,
DIDumpOptions DumpOpts, Optional<uint64_t> Offset) const;
/// Return the location list at the given offset or nullptr.
LocationList const *getLocationListAtOffset(uint64_t Offset) const;
static Expected<LocationList>
parseOneLocationList(const DWARFDataExtractor &Data, uint64_t *Offset,
unsigned Version);
/// Dump all location lists within the given range.
static void dumpRange(const DWARFDataExtractor &Data, uint64_t StartOffset,
uint64_t Size, uint16_t Version, raw_ostream &OS,
uint64_t BaseAddr, const MCRegisterInfo *MRI,
DIDumpOptions DumpOpts);
};
} // end namespace llvm

47
llvm/lib/DebugInfo/DWARF/DWARFContext.cpp
View File

@@ -300,11 +300,21 @@ static void dumpLoclistsSection(raw_ostream &OS, DIDumpOptions DumpOpts,
Header.dump(OS, DumpOpts);
DWARFDebugLoclists Loclists;
uint64_t EndOffset = Header.length() + Header.getHeaderOffset();
Data.setAddressSize(Header.getAddrSize());
Loclists.parse(Data, Offset, EndOffset, Header.getVersion());
Loclists.dump(OS, 0, MRI, DumpOpts, DumpOffset);
if (DumpOffset) {
if (DumpOffset >= Offset && DumpOffset < EndOffset) {
Offset = *DumpOffset;
DWARFDebugLoclists::dumpLocationList(Data, &Offset, Header.getVersion(),
OS, /*BaseAddr=*/0, MRI, nullptr,
DumpOpts, /*Indent=*/0);
OS << "\n";
return;
}
} else {
DWARFDebugLoclists::dumpRange(Data, Offset, EndOffset - Offset,
Header.getVersion(), OS, 0, MRI, DumpOpts);
}
Offset = EndOffset;
}
}
@@ -393,7 +403,19 @@ void DWARFContext::dump(
if (const auto *Off =
shouldDump(ExplicitDWO, ".debug_loc.dwo", DIDT_ID_DebugLoc,
DObj->getLocDWOSection().Data)) {
getDebugLocDWO()->dump(OS, 0, getRegisterInfo(), DumpOpts, *Off);
DWARFDataExtractor Data(*DObj, DObj->getLocDWOSection(), isLittleEndian(),
4);
if (*Off) {
uint64_t Offset = **Off;
DWARFDebugLoclists::dumpLocationList(Data, &Offset, /*Version=*/4, OS,
/*BaseAddr=*/0, getRegisterInfo(),
nullptr, DumpOpts, /*Indent=*/0);
OS << "\n";
} else {
DWARFDebugLoclists::dumpRange(Data, 0, Data.getData().size(),
/*Version=*/4, OS, /*BaseAddr=*/0,
getRegisterInfo(), DumpOpts);
}
}
if (const auto *Off = shouldDump(Explicit, ".debug_frame", DIDT_ID_DebugFrame,
@@ -724,23 +746,6 @@ const DWARFDebugLoc *DWARFContext::getDebugLoc() {
return Loc.get();
}
const DWARFDebugLoclists *DWARFContext::getDebugLocDWO() {
if (LocDWO)
return LocDWO.get();
LocDWO.reset(new DWARFDebugLoclists());
// Assume all compile units have the same address byte size.
// FIXME: We don't need AddressSize for split DWARF since relocatable
// addresses cannot appear there. At the moment DWARFExpression requires it.
DWARFDataExtractor LocData(*DObj, DObj->getLocDWOSection(), isLittleEndian(),
4);
// Use version 4. DWO does not support the DWARF v5 .debug_loclists yet and
// that means we are parsing the new style .debug_loc (pre-standatized version
// of the .debug_loclists).
LocDWO->parse(LocData, 0, LocData.getData().size(), 4 /* Version */);
return LocDWO.get();
}
const DWARFDebugAranges *DWARFContext::getDebugAranges() {
if (Aranges)
return Aranges.get();

148
llvm/lib/DebugInfo/DWARF/DWARFDebugLoc.cpp
View File

@@ -139,19 +139,19 @@ void DWARFDebugLoc::parse(const DWARFDataExtractor &data) {
}
}
Expected<DWARFDebugLoclists::LocationList>
DWARFDebugLoclists::parseOneLocationList(const DWARFDataExtractor &Data,
uint64_t *Offset, unsigned Version) {
LocationList LL;
LL.Offset = *Offset;
DataExtractor::Cursor C(*Offset);
Error DWARFDebugLoclists::visitLocationList(
const DWARFDataExtractor &Data, uint64_t *Offset, uint16_t Version,
llvm::function_ref<bool(const Entry &)> F) {
// dwarf::DW_LLE_end_of_list_entry is 0 and indicates the end of the list.
while (auto Kind = Data.getU8(C)) {
DataExtractor::Cursor C(*Offset);
bool Continue = true;
while (Continue) {
Entry E;
E.Kind = Kind;
E.Offset = C.tell() - 1;
switch (Kind) {
E.Offset = C.tell();
E.Kind = Data.getU8(C);
switch (E.Kind) {
case dwarf::DW_LLE_end_of_list:
break;
case dwarf::DW_LLE_base_addressx:
E.Value0 = Data.getULEB128(C);
break;
@@ -164,10 +164,6 @@ DWARFDebugLoclists::parseOneLocationList(const DWARFDataExtractor &Data,
else
E.Value1 = Data.getULEB128(C);
break;
case dwarf::DW_LLE_start_length:
E.Value0 = Data.getRelocatedAddress(C);
E.Value1 = Data.getULEB128(C);
break;
case dwarf::DW_LLE_offset_pair:
E.Value0 = Data.getULEB128(C);
E.Value1 = Data.getULEB128(C);
@@ -175,53 +171,62 @@ DWARFDebugLoclists::parseOneLocationList(const DWARFDataExtractor &Data,
case dwarf::DW_LLE_base_address:
E.Value0 = Data.getRelocatedAddress(C);
break;
case dwarf::DW_LLE_start_length:
E.Value0 = Data.getRelocatedAddress(C);
E.Value1 = Data.getULEB128(C);
break;
case dwarf::DW_LLE_startx_endx:
case dwarf::DW_LLE_default_location:
case dwarf::DW_LLE_start_end:
default:
cantFail(C.takeError());
return createStringError(errc::illegal_byte_sequence,
"LLE of kind %x not supported", (int)Kind);
"LLE of kind %x not supported", (int)E.Kind);
}
if (Kind != dwarf::DW_LLE_base_address &&
Kind != dwarf::DW_LLE_base_addressx) {
if (E.Kind != dwarf::DW_LLE_base_address &&
E.Kind != dwarf::DW_LLE_base_addressx &&
E.Kind != dwarf::DW_LLE_end_of_list) {
unsigned Bytes = Version >= 5 ? Data.getULEB128(C) : Data.getU16(C);
// A single location description describing the location of the object...
Data.getU8(C, E.Loc, Bytes);
}
LL.Entries.push_back(std::move(E));
if (!C)
return C.takeError();
Continue = F(E) && E.Kind != dwarf::DW_LLE_end_of_list;
}
if (Error Err = C.takeError())
return std::move(Err);
Entry E;
E.Kind = dwarf::DW_LLE_end_of_list;
E.Offset = C.tell() - 1;
LL.Entries.push_back(E);
*Offset = C.tell();
return LL;
return Error::success();
}
void DWARFDebugLoclists::parse(const DWARFDataExtractor &data, uint64_t Offset,
uint64_t EndOffset, uint16_t Version) {
IsLittleEndian = data.isLittleEndian();
AddressSize = data.getAddressSize();
while (Offset < EndOffset) {
if (auto LL = parseOneLocationList(data, &Offset, Version))
Locations.push_back(std::move(*LL));
else {
logAllUnhandledErrors(LL.takeError(), WithColor::error());
return;
}
bool DWARFDebugLoclists::dumpLocationList(const DWARFDataExtractor &Data,
uint64_t *Offset, uint16_t Version,
raw_ostream &OS, uint64_t BaseAddr,
const MCRegisterInfo *MRI,
DWARFUnit *U, DIDumpOptions DumpOpts,
unsigned Indent) {
size_t MaxEncodingStringLength = 0;
if (DumpOpts.Verbose) {
#define HANDLE_DW_LLE(ID, NAME) \
MaxEncodingStringLength = std::max(MaxEncodingStringLength, \
dwarf::LocListEncodingString(ID).size());
#include "llvm/BinaryFormat/Dwarf.def"
}
}
DWARFDebugLoclists::LocationList const *
DWARFDebugLoclists::getLocationListAtOffset(uint64_t Offset) const {
auto It = partition_point(
Locations, [=](const LocationList &L) { return L.Offset < Offset; });
if (It != Locations.end() && It->Offset == Offset)
return &(*It);
return nullptr;
OS << format("0x%8.8" PRIx64 ": ", *Offset);
Error E = visitLocationList(Data, Offset, Version, [&](const Entry &E) {
E.dump(OS, BaseAddr, Data.isLittleEndian(), Data.getAddressSize(), MRI, U,
DumpOpts, Indent, MaxEncodingStringLength);
return true;
});
if (E) {
OS << "\n";
OS.indent(Indent);
OS << "error: " << toString(std::move(E));
return false;
}
return true;
}
void DWARFDebugLoclists::Entry::dump(raw_ostream &OS, uint64_t &BaseAddr,
@@ -297,44 +302,25 @@ void DWARFDebugLoclists::Entry::dump(raw_ostream &OS, uint64_t &BaseAddr,
dumpExpression(OS, Loc, IsLittleEndian, AddressSize, MRI, U);
}
void DWARFDebugLoclists::LocationList::dump(raw_ostream &OS, uint64_t BaseAddr,
bool IsLittleEndian,
unsigned AddressSize,
const MCRegisterInfo *MRI,
DWARFUnit *U,
DIDumpOptions DumpOpts,
unsigned Indent) const {
size_t MaxEncodingStringLength = 0;
if (DumpOpts.Verbose)
for (const auto &Entry : Entries)
MaxEncodingStringLength =
std::max(MaxEncodingStringLength,
dwarf::LocListEncodingString(Entry.Kind).size());
for (const Entry &E : Entries)
E.dump(OS, BaseAddr, IsLittleEndian, AddressSize, MRI, U, DumpOpts, Indent,
MaxEncodingStringLength);
}
void DWARFDebugLoclists::dump(raw_ostream &OS, uint64_t BaseAddr,
const MCRegisterInfo *MRI, DIDumpOptions DumpOpts,
Optional<uint64_t> Offset) const {
auto DumpLocationList = [&](const LocationList &L) {
OS << format("0x%8.8" PRIx64 ": ", L.Offset);
L.dump(OS, BaseAddr, IsLittleEndian, AddressSize, MRI, nullptr, DumpOpts,
/*Indent=*/12);
OS << "\n";
};
if (Offset) {
if (auto *L = getLocationListAtOffset(*Offset))
DumpLocationList(*L);
void DWARFDebugLoclists::dumpRange(const DWARFDataExtractor &Data,
uint64_t StartOffset, uint64_t Size,
uint16_t Version, raw_ostream &OS,
uint64_t BaseAddr, const MCRegisterInfo *MRI,
DIDumpOptions DumpOpts) {
if (!Data.isValidOffsetForDataOfSize(StartOffset, Size)) {
OS << "Invalid dump range\n";
return;
}
uint64_t Offset = StartOffset;
StringRef Separator;
bool CanContinue = true;
while (CanContinue && Offset < StartOffset + Size) {
OS << Separator;
Separator = "\n";
for (const LocationList &L : Locations) {
DumpLocationList(L);
if (&L != &Locations.back())
OS << '\n';
CanContinue = dumpLocationList(Data, &Offset, Version, OS, BaseAddr, MRI,
nullptr, DumpOpts, /*Indent=*/12);
OS << '\n';
}
}

46
llvm/lib/DebugInfo/DWARF/DWARFDie.cpp
View File

@@ -91,30 +91,32 @@ static void dumpLocation(raw_ostream &OS, DWARFFormValue &FormValue,
return;
}
FormValue.dump(OS, DumpOpts);
const auto &DumpLL = [&](auto ExpectedLL) {
if (ExpectedLL) {
uint64_t BaseAddr = 0;
if (Optional<object::SectionedAddress> BA = U->getBaseAddress())
BaseAddr = BA->Address;
auto LLDumpOpts = DumpOpts;
LLDumpOpts.Verbose = false;
ExpectedLL->dump(OS, BaseAddr, Ctx.isLittleEndian(), Obj.getAddressSize(),
MRI, U, LLDumpOpts, Indent);
} else {
OS << '\n';
OS.indent(Indent);
OS << formatv("error extracting location list: {0}",
fmt_consume(ExpectedLL.takeError()));
}
};
if (FormValue.isFormClass(DWARFFormValue::FC_SectionOffset)) {
uint64_t Offset = *FormValue.getAsSectionOffset();
uint64_t BaseAddr = 0;
if (Optional<object::SectionedAddress> BA = U->getBaseAddress())
BaseAddr = BA->Address;
auto LLDumpOpts = DumpOpts;
LLDumpOpts.Verbose = false;
if (!U->isDWOUnit() && !U->getLocSection()->Data.empty()) {
DWARFDebugLoc DebugLoc;
DWARFDataExtractor Data(Obj, *U->getLocSection(), Ctx.isLittleEndian(),
Obj.getAddressSize());
DumpLL(DebugLoc.parseOneLocationList(Data, &Offset));
FormValue.dump(OS, DumpOpts);
OS << ": ";
if (Expected<DWARFDebugLoc::LocationList> LL =
DebugLoc.parseOneLocationList(Data, &Offset)) {
LL->dump(OS, BaseAddr, Ctx.isLittleEndian(), Obj.getAddressSize(), MRI,
U, LLDumpOpts, Indent);
} else {
OS << '\n';
OS.indent(Indent);
OS << formatv("error extracting location list: {0}",
fmt_consume(LL.takeError()));
}
return;
}
@@ -131,10 +133,14 @@ static void dumpLocation(raw_ostream &OS, DWARFFormValue &FormValue,
// Modern locations list (.debug_loclists) are used starting from v5.
// Ideally we should take the version from the .debug_loclists section
// header, but using CU's version for simplicity.
DumpLL(DWARFDebugLoclists::parseOneLocationList(
Data, &Offset, UseLocLists ? U->getVersion() : 4));
DWARFDebugLoclists::dumpLocationList(
Data, &Offset, UseLocLists ? U->getVersion() : 4, OS, BaseAddr, MRI,
U, LLDumpOpts, Indent);
}
return;
}
FormValue.dump(OS, DumpOpts);
}
/// Dump the name encoded in the type tag.

18
llvm/test/CodeGen/X86/debug-loclists.ll
View File

@@ -28,28 +28,28 @@
; the function, and the one that doesn't.
; CHECK-NEXT: 0x0000000c:
; CHECK-NEXT: DW_LLE_base_addressx(0x0000000000000000)
; CHECK-NEXT: DW_LLE_offset_pair (0x0000000000000000, 0x0000000000000003)
; CHECK-NEXT: DW_LLE_base_addressx (0x0000000000000000)
; CHECK-NEXT: DW_LLE_offset_pair (0x0000000000000000, 0x0000000000000003)
; CHECK-NEXT: => [0x0000000000000000, 0x0000000000000003): DW_OP_consts +3, DW_OP_stack_value
; CHECK-NEXT: DW_LLE_offset_pair (0x0000000000000003, 0x0000000000000004)
; CHECK-NEXT: DW_LLE_offset_pair (0x0000000000000003, 0x0000000000000004)
; CHECK-NEXT: => [0x0000000000000003, 0x0000000000000004): DW_OP_consts +4, DW_OP_stack_value
; CHECK-NEXT: DW_LLE_end_of_list ()
; CHECK-NEXT: DW_LLE_end_of_list ()
; Show that startx_length can be used when the address range starts at the start of the function.
; CHECK: 0x0000001d:
; CHECK-NEXT: DW_LLE_startx_length(0x0000000000000000, 0x0000000000000003)
; CHECK-NEXT: DW_LLE_startx_length (0x0000000000000000, 0x0000000000000003)
; CHECK-NEXT: => Addr idx 0 (w/ length 3): DW_OP_consts +5, DW_OP_stack_value
; CHECK-NEXT: DW_LLE_end_of_list ()
; CHECK-NEXT: DW_LLE_end_of_list ()
; And use a base address when the range doesn't start at an existing/useful
; address in the pool.
; CHECK: 0x00000025:
; CHECK-NEXT: DW_LLE_base_addressx(0x0000000000000000)
; CHECK-NEXT: DW_LLE_offset_pair (0x0000000000000003, 0x0000000000000004)
; CHECK-NEXT: DW_LLE_base_addressx (0x0000000000000000)
; CHECK-NEXT: DW_LLE_offset_pair (0x0000000000000003, 0x0000000000000004)
; CHECK-NEXT: => [0x0000000000000003, 0x0000000000000004): DW_OP_reg0 RAX
; CHECK-NEXT: DW_LLE_end_of_list ()
; CHECK-NEXT: DW_LLE_end_of_list ()
; Built with clang -O3 -ffunction-sections from source:
;

4
llvm/test/DebugInfo/X86/dwarfdump-debug-loclists-error-cases2.s
View File

@@ -8,11 +8,11 @@
# CHECK: DW_AT_name ("x1")
# CHECK-NEXT: DW_AT_location (0xdeadbeef
# CHECK-NEXT: error extracting location list: unexpected end of data)
# CHECK-NEXT: error: unexpected end of data)
# CHECK: DW_AT_name ("x2")
# CHECK-NEXT: DW_AT_location (0x00000025
# CHECK-NEXT: error extracting location list: unexpected end of data)
# CHECK-NEXT: error: unexpected end of data)
.type f,@function

10
llvm/test/DebugInfo/X86/dwarfdump-debug-loclists.test
View File

@@ -11,14 +11,14 @@
# CHECK: .debug_loclists contents:
# CHECK-NEXT: 0x00000000: locations list header: length = 0x0000002c, version = 0x0005, addr_size = 0x08, seg_size = 0x00, offset_entry_count = 0x00000000
# CHECK-NEXT: 0x0000000c:
# CHECK-NEXT: DW_LLE_offset_pair (0x0000000000000000, 0x0000000000000010)
# CHECK-NEXT: DW_LLE_offset_pair (0x0000000000000000, 0x0000000000000010)
# CHECK-NEXT: => [0x0000000000000000, 0x0000000000000010): DW_OP_breg5 RDI+0
# CHECK-NEXT: DW_LLE_base_address(0x0000000000000500)
# CHECK-NEXT: DW_LLE_offset_pair (0x0000000000000030, 0x0000000000000040)
# CHECK-NEXT: DW_LLE_base_address (0x0000000000000500)
# CHECK-NEXT: DW_LLE_offset_pair (0x0000000000000030, 0x0000000000000040)
# CHECK-NEXT: => [0x0000000000000530, 0x0000000000000540): DW_OP_breg6 RBP-8, DW_OP_deref
# CHECK-NEXT: DW_LLE_start_length(0x0000000000000700, 0x0000000000000010)
# CHECK-NEXT: DW_LLE_start_length (0x0000000000000700, 0x0000000000000010)
# CHECK-NEXT: => [0x0000000000000700, 0x0000000000000710): DW_OP_breg5 RDI+0
# CHECK-NEXT: DW_LLE_end_of_list ()
# CHECK-NEXT: DW_LLE_end_of_list ()
.section .debug_str,"MS",@progbits,1
.asciz "stub"

34
llvm/test/DebugInfo/X86/fission-ranges.ll
View File

@@ -32,10 +32,10 @@
; CHECK: DW_TAG_formal_parameter
; CHECK-NEXT: DW_AT_const_value [DW_FORM_sdata] (1)
; CHECK-NEXT: DW_AT_name {{.*}} "p")
; CHECK: DW_AT_location [DW_FORM_sec_offset] ([[A:0x[0-9a-z]*]]
; CHECK: DW_AT_location [DW_FORM_sec_offset] ([[E:0x[0-9a-z]*]]
; CHECK: DW_AT_location [DW_FORM_sec_offset] ([[B:0x[0-9a-z]*]]
; CHECK: DW_AT_location [DW_FORM_sec_offset] ([[D:0x[0-9a-z]*]]
; CHECK: DW_AT_location [DW_FORM_sec_offset] ([[A:0x[0-9a-z]*]]:
; CHECK: DW_AT_location [DW_FORM_sec_offset] ([[E:0x[0-9a-z]*]]:
; CHECK: DW_AT_location [DW_FORM_sec_offset] ([[B:0x[0-9a-z]*]]:
; CHECK: DW_AT_location [DW_FORM_sec_offset] ([[D:0x[0-9a-z]*]]:
; CHECK: DW_AT_ranges [DW_FORM_sec_offset] (0x00000000
; CHECK-NOT: .debug_loc contents:
; CHECK-NOT: Beginning address offset
@@ -45,31 +45,31 @@
; if they've changed due to a bugfix, change in register allocation, etc.
; CHECK: [[A]]:
; CHECK-NEXT: DW_LLE_startx_length(0x00000002, 0x0000000f)
; CHECK-NEXT: DW_LLE_startx_length (0x00000002, 0x0000000f)
; CHECK-NEXT: => Addr idx 2 (w/ length 15): DW_OP_consts +0, DW_OP_stack_value
; CHECK-NEXT: DW_LLE_startx_length(0x00000003, 0x0000000f)
; CHECK-NEXT: DW_LLE_startx_length (0x00000003, 0x0000000f)
; CHECK-NEXT: => Addr idx 3 (w/ length 15): DW_OP_reg0 RAX
; CHECK-NEXT: DW_LLE_startx_length(0x00000004, 0x00000012)
; CHECK-NEXT: DW_LLE_startx_length (0x00000004, 0x00000012)
; CHECK-NEXT: => Addr idx 4 (w/ length 18): DW_OP_breg7 RSP-8
; CHECK-NEXT: DW_LLE_end_of_list ()
; CHECK-NEXT: DW_LLE_end_of_list ()
; CHECK: [[E]]:
; CHECK-NEXT: DW_LLE_startx_length(0x00000005, 0x00000009)
; CHECK-NEXT: DW_LLE_startx_length (0x00000005, 0x00000009)
; CHECK-NEXT: => Addr idx 5 (w/ length 9): DW_OP_reg0 RAX
; CHECK-NEXT: DW_LLE_startx_length(0x00000006, 0x00000062)
; CHECK-NEXT: DW_LLE_startx_length (0x00000006, 0x00000062)
; CHECK-NEXT: => Addr idx 6 (w/ length 98): DW_OP_breg7 RSP-44
; CHECK-NEXT: DW_LLE_end_of_list ()
; CHECK-NEXT: DW_LLE_end_of_list ()
; CHECK: [[B]]:
; CHECK-NEXT: DW_LLE_startx_length(0x00000007, 0x0000000f)
; CHECK-NEXT: DW_LLE_startx_length (0x00000007, 0x0000000f)
; CHECK-NEXT: => Addr idx 7 (w/ length 15): DW_OP_reg0 RAX
; CHECK-NEXT: DW_LLE_startx_length(0x00000008, 0x00000042)
; CHECK-NEXT: DW_LLE_startx_length (0x00000008, 0x00000042)
; CHECK-NEXT: => Addr idx 8 (w/ length 66): DW_OP_breg7 RSP-32
; CHECK-NEXT: DW_LLE_end_of_list ()
; CHECK-NEXT: DW_LLE_end_of_list ()
; CHECK: [[D]]:
; CHECK-NEXT: DW_LLE_startx_length(0x00000009, 0x0000000f)
; CHECK-NEXT: DW_LLE_startx_length (0x00000009, 0x0000000f)
; CHECK-NEXT: => Addr idx 9 (w/ length 15): DW_OP_reg0 RAX
; CHECK-NEXT: DW_LLE_startx_length(0x0000000a, 0x0000002a)
; CHECK-NEXT: DW_LLE_startx_length (0x0000000a, 0x0000002a)
; CHECK-NEXT: => Addr idx 10 (w/ length 42): DW_OP_breg7 RSP-20
; CHECK-NEXT: DW_LLE_end_of_list ()
; CHECK-NEXT: DW_LLE_end_of_list ()
; Make sure we don't produce any relocations in any .dwo section (though in particular, debug_info.dwo)
; HDR-NOT: .rela.{{.*}}.dwo

4
llvm/test/DebugInfo/X86/stack-value-piece.ll
View File

@@ -18,14 +18,14 @@
; CHECK: DW_TAG_subprogram
; CHECK: DW_AT_name {{.*}} "i"
; CHECK: DW_TAG_variable
; CHECK-NEXT: DW_AT_location {{.*}} ([[I:.*]]
; CHECK-NEXT: DW_AT_location {{.*}} ([[I:0x[0-9a-f]+]]
; CHECK-NEXT: [{{.*}}, {{.*}}): DW_OP_reg5 RDI, DW_OP_piece 0x4, DW_OP_lit0, DW_OP_stack_value, DW_OP_piece 0x4)
; CHECK-NEXT: DW_AT_name {{.*}} "r"
;
; CHECK: DW_TAG_subprogram
; CHECK: DW_AT_name {{.*}} "f"
; CHECK: DW_TAG_variable
; CHECK-NEXT: DW_AT_location {{.*}} ([[F:.*]]
; CHECK-NEXT: DW_AT_location {{.*}} ([[F:0x[0-9a-f]+]]
; CHECK-NEXT: [{{.*}}, {{.*}}): DW_OP_reg17 XMM0, DW_OP_piece 0x4, DW_OP_lit0, DW_OP_stack_value, DW_OP_piece 0x4
; CHECK-NEXT: [{{.*}}, {{.*}}): DW_OP_piece 0x4, DW_OP_lit0, DW_OP_stack_value, DW_OP_piece 0x4)
; CHECK-NEXT: DW_AT_name {{.*}} "r"

4
llvm/test/tools/llvm-dwarfdump/X86/debug_loclists_startx_length.s
View File

@@ -8,9 +8,9 @@
# CHECK: .debug_loclists contents:
# CHECK-NEXT: 0x00000000: locations list header: length = 0x0000000e, version = 0x0005, addr_size = 0x08, seg_size = 0x00, offset_entry_count = 0x00000000
# CHECK-NEXT: 0x0000000c:
# CHECK-NEXT: DW_LLE_startx_length(0x0000000000000001, 0x0000000000000010)
# CHECK-NEXT: DW_LLE_startx_length (0x0000000000000001, 0x0000000000000010)
# CHECK-NEXT: => Addr idx 1 (w/ length 16): DW_OP_reg5 RDI
# CHECK-NEXT: DW_LLE_end_of_list ()
# CHECK-NEXT: DW_LLE_end_of_list ()
.section .debug_loclists,"",@progbits
.long .Ldebug_loclist_table_end0-.Ldebug_loclist_table_start0