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Fix emission of Dwarf accelerator table when there are multiple CUs.

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The DIE offset in the accel tables is an offset relative to the start
of the debug_info section, but we were encoding the offset to the
start of the containing CU.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@221837 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Frederic Riss 2014-11-12 23:48:14 +00:00
parent 931e22fd7c
commit 72c32c6c82
4 changed files with 24 additions and 9 deletions
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9
lib/CodeGen/AsmPrinter/DwarfAccelTable.cpp
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@ -13,6 +13,7 @@
#include "DwarfAccelTable.h"
#include "DIE.h"
#include "DwarfCompileUnit.h"
#include "DwarfDebug.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/Twine.h"
@ -174,7 +175,7 @@ void DwarfAccelTable::EmitOffsets(AsmPrinter *Asm, MCSymbol *SecBegin) {
// Walk through the buckets and emit the full data for each element in
// the bucket. For the string case emit the dies and the various offsets.
// Terminate each HashData bucket with 0.
void DwarfAccelTable::EmitData(AsmPrinter *Asm, DwarfFile *D,
void DwarfAccelTable::EmitData(AsmPrinter *Asm, DwarfDebug *D,
MCSymbol *StrSym) {
uint64_t PrevHash = UINT64_MAX;
for (size_t i = 0, e = Buckets.size(); i < e; ++i) {
@ -189,7 +190,9 @@ void DwarfAccelTable::EmitData(AsmPrinter *Asm, DwarfFile *D,
Asm->EmitInt32((*HI)->Data.Values.size());
for (HashDataContents *HD : (*HI)->Data.Values) {
// Emit the DIE offset
Asm->EmitInt32(HD->Die->getOffset());
DwarfCompileUnit *CU = D->lookupUnit(HD->Die->getUnit());
assert(CU && "Accelerated DIE should belong to a CU.");
Asm->EmitInt32(HD->Die->getOffset() + CU->getDebugInfoOffset());
// If we have multiple Atoms emit that info too.
// FIXME: A bit of a hack, we either emit only one atom or all info.
if (HeaderData.Atoms.size() > 1) {
@ -206,7 +209,7 @@ void DwarfAccelTable::EmitData(AsmPrinter *Asm, DwarfFile *D,
}
// Emit the entire data structure to the output file.
void DwarfAccelTable::Emit(AsmPrinter *Asm, MCSymbol *SecBegin, DwarfFile *D,
void DwarfAccelTable::Emit(AsmPrinter *Asm, MCSymbol *SecBegin, DwarfDebug *D,
MCSymbol *StrSym) {
// Emit the header.
EmitHeader(Asm);

6
lib/CodeGen/AsmPrinter/DwarfAccelTable.h
View File

@ -62,7 +62,7 @@
namespace llvm {
class AsmPrinter;
class DwarfFile;
class DwarfDebug;
class DwarfAccelTable {
@ -223,7 +223,7 @@ private:
void EmitBuckets(AsmPrinter *);
void EmitHashes(AsmPrinter *);
void EmitOffsets(AsmPrinter *, MCSymbol *);
void EmitData(AsmPrinter *, DwarfFile *D, MCSymbol *StrSym);
void EmitData(AsmPrinter *, DwarfDebug *D, MCSymbol *StrSym);
// Allocator for HashData and HashDataContents.
BumpPtrAllocator Allocator;
@ -248,7 +248,7 @@ public:
void AddName(StringRef Name, MCSymbol *StrSym, const DIE *Die,
char Flags = 0);
void FinalizeTable(AsmPrinter *, StringRef);
void Emit(AsmPrinter *, MCSymbol *, DwarfFile *, MCSymbol *StrSym);
void Emit(AsmPrinter *, MCSymbol *, DwarfDebug *, MCSymbol *StrSym);
#ifndef NDEBUG
void print(raw_ostream &O);
void dump() { print(dbgs()); }

2
lib/CodeGen/AsmPrinter/DwarfDebug.cpp
View File

@ -1478,7 +1478,7 @@ void DwarfDebug::emitAccel(DwarfAccelTable &Accel, const MCSection *Section,
Asm->OutStreamer.EmitLabel(SectionBegin);
// Emit the full data.
Accel.Emit(Asm, SectionBegin, &InfoHolder, DwarfStrSectionSym);
Accel.Emit(Asm, SectionBegin, this, DwarfStrSectionSym);
}
// Emit visible names into a hashed accelerator table section.

16
test/DebugInfo/cross-cu-inlining.ll
View File

@ -1,6 +1,7 @@
; REQUIRES: object-emission
; RUN: %llc_dwarf -O0 -filetype=obj < %s | llvm-dwarfdump -debug-dump=info - | FileCheck -implicit-check-not=DW_TAG %s
; RUN: %llc_dwarf -O0 -filetype=obj < %s | llvm-dwarfdump - | FileCheck --check-prefix=CHECK-ACCEL --check-prefix=CHECK %s
; Build from source:
; $ clang++ a.cpp b.cpp -g -c -emit-llvm
@ -24,7 +25,7 @@
; CHECK: DW_AT_name {{.*}} "a.cpp"
; CHECK: DW_TAG_subprogram
; CHECK: DW_AT_type [DW_FORM_ref_addr] (0x00000000[[INT:.*]])
; CHECK: DW_TAG_inlined_subroutine
; CHECK: 0x[[INLINED:[0-9a-f]*]]:{{.*}}DW_TAG_inlined_subroutine
; CHECK: DW_AT_abstract_origin {{.*}}[[ABS_FUNC:........]] "_Z4funci"
; CHECK: DW_TAG_formal_parameter
; CHECK: DW_AT_abstract_origin {{.*}}[[ABS_VAR:........]] "x"
@ -45,13 +46,24 @@
; Check the concrete out of line definition references the abstract and
; provides the address range and variable location
; CHECK: DW_TAG_subprogram
; CHECK: 0x[[FUNC:[0-9a-f]*]]{{.*}}DW_TAG_subprogram
; CHECK: DW_AT_low_pc
; CHECK: DW_AT_abstract_origin {{.*}} {0x[[ABS_FUNC]]} "_Z4funci"
; CHECK: DW_TAG_formal_parameter
; CHECK: DW_AT_location
; CHECK: DW_AT_abstract_origin {{.*}} {0x[[ABS_VAR]]} "x"
; CHECK-ACCEL: .apple_names contents:
; CHECK-ACCEL: Name{{.*}}"func"
; CHECK-ACCEL-NOT: Name
; CHECK-ACCEL: Atom[0]{{.*}}[[INLINED]]
; CHECK-ACCEL-NOT: Name
; CHECK-ACCEL: Atom[0]{{.*}}[[FUNC]]
; CHECK-ACCEL: .apple_types contents:
; CHECK-ACCEL: Name{{.*}}"int"
; CHECK-ACCEL-NOT: Name
; CHECK-ACCEL: Atom[0]{{.*}}[[INT]]
@i = external global i32