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Add support for fetching inlining context (stack of source code locations)

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by instruction address from DWARF.

Add --inlining flag to llvm-dwarfdump to demonstrate and test this functionality,
so that "llvm-dwarfdump --inlining --address=0x..." now works much like
"addr2line -i 0x...", provided that the binary has debug info
(Clang's -gline-tables-only *is* enough).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163128 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Alexey Samsonov
2012-09-04 08:12:33 +00:00
parent 2d5c28da0d
commit 5eae90d727
12 changed files with 359 additions and 88 deletions
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50
lib/DebugInfo/DWARFDebugInfoEntry.h
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@@ -11,6 +11,7 @@
#define LLVM_DEBUGINFO_DWARFDEBUGINFOENTRY_H
#include "DWARFAbbreviationDeclaration.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/Support/DataTypes.h"
namespace llvm {
@@ -19,6 +20,7 @@ class DWARFDebugAranges;
class DWARFCompileUnit;
class DWARFContext;
class DWARFFormValue;
class DWARFInlinedSubroutineChain;
/// DWARFDebugInfoEntryMinimal - A DIE with only the minimum required data.
class DWARFDebugInfoEntryMinimal {
@@ -52,6 +54,13 @@ public:
uint32_t getTag() const { return AbbrevDecl ? AbbrevDecl->getTag() : 0; }
bool isNULL() const { return AbbrevDecl == 0; }
/// Returns true if DIE represents a subprogram (not inlined).
bool isSubprogramDIE() const;
/// Returns true if DIE represents a subprogram or an inlined
/// subroutine.
bool isSubroutineDIE() const;
uint32_t getOffset() const { return Offset; }
uint32_t getNumAttributes() const {
return !isNULL() ? AbbrevDecl->getNumAttributes() : 0;
@@ -126,17 +135,40 @@ public:
const uint16_t attr,
int64_t fail_value) const;
void buildAddressRangeTable(const DWARFCompileUnit *cu,
DWARFDebugAranges *debug_aranges) const;
/// Retrieves DW_AT_low_pc and DW_AT_high_pc from CU.
/// Returns true if both attributes are present.
bool getLowAndHighPC(const DWARFCompileUnit *CU,
uint64_t &LowPC, uint64_t &HighPC) const;
bool addressRangeContainsAddress(const DWARFCompileUnit *cu,
const uint64_t address) const;
void buildAddressRangeTable(const DWARFCompileUnit *CU,
DWARFDebugAranges *DebugAranges) const;
// If a DIE represents a subprogram, returns its mangled name
// (or short name, if mangled is missing). This name may be fetched
// from specification or abstract origin for this subprogram.
// Returns null if no name is found.
const char* getSubprogramName(const DWARFCompileUnit *cu) const;
bool addressRangeContainsAddress(const DWARFCompileUnit *CU,
const uint64_t Address) const;
/// If a DIE represents a subprogram (or inlined subroutine),
/// returns its mangled name (or short name, if mangled is missing).
/// This name may be fetched from specification or abstract origin
/// for this subprogram. Returns null if no name is found.
const char* getSubroutineName(const DWARFCompileUnit *CU) const;
/// Retrieves values of DW_AT_call_file, DW_AT_call_line and
/// DW_AT_call_column from DIE (or zeroes if they are missing).
void getCallerFrame(const DWARFCompileUnit *CU, uint32_t &CallFile,
uint32_t &CallLine, uint32_t &CallColumn) const;
/// InlinedChain - represents a chain of inlined_subroutine
/// DIEs, (possibly ending with subprogram DIE), all of which are contained
/// in some concrete inlined instance tree. Address range for each DIE
/// (except the last DIE) in this chain is contained in address
/// range for next DIE in the chain.
typedef SmallVector<DWARFDebugInfoEntryMinimal, 4> InlinedChain;
/// Get inlined chain for a given address, rooted at the current DIE.
/// Returns empty chain if address is not contained in address range
/// of current DIE.
InlinedChain getInlinedChainForAddress(const DWARFCompileUnit *CU,
const uint64_t Address) const;
};
}