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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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87
lib/DebugInfo/DWARFContext.cpp
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@ -183,15 +183,11 @@ static bool getFileNameForCompileUnit(
return true;
}
bool
DWARFContext::getFileLineInfoForCompileUnit(DWARFCompileUnit *CU,
uint64_t Address,
bool NeedsAbsoluteFilePath,
std::string &FileName,
uint32_t &Line, uint32_t &Column) {
// Get the line table for this compile unit.
const DWARFDebugLine::LineTable *LineTable = getLineTableForCompileUnit(CU);
if (!LineTable)
static bool getFileLineInfoForCompileUnit(
DWARFCompileUnit *CU, const DWARFDebugLine::LineTable *LineTable,
uint64_t Address, bool NeedsAbsoluteFilePath, std::string &FileName,
uint32_t &Line, uint32_t &Column) {
if (CU == 0 || LineTable == 0)
return false;
// Get the index of row we're looking for in the line table.
uint32_t RowIndex = LineTable->lookupAddress(Address);
@ -217,21 +213,84 @@ DILineInfo DWARFContext::getLineInfoForAddress(uint64_t Address,
uint32_t Line = 0;
uint32_t Column = 0;
if (Specifier.needs(DILineInfoSpecifier::FunctionName)) {
const DWARFDebugInfoEntryMinimal *FunctionDIE =
CU->getFunctionDIEForAddress(Address);
if (FunctionDIE) {
if (const char *Name = FunctionDIE->getSubprogramName(CU))
// The address may correspond to instruction in some inlined function,
// so we have to build the chain of inlined functions and take the
// name of the topmost function in it.
const DWARFDebugInfoEntryMinimal::InlinedChain &InlinedChain =
CU->getInlinedChainForAddress(Address);
if (InlinedChain.size() > 0) {
const DWARFDebugInfoEntryMinimal &TopFunctionDIE = InlinedChain[0];
if (const char *Name = TopFunctionDIE.getSubroutineName(CU))
FunctionName = Name;
}
}
if (Specifier.needs(DILineInfoSpecifier::FileLineInfo)) {
const DWARFDebugLine::LineTable *LineTable =
getLineTableForCompileUnit(CU);
const bool NeedsAbsoluteFilePath =
Specifier.needs(DILineInfoSpecifier::AbsoluteFilePath);
getFileLineInfoForCompileUnit(CU, Address, NeedsAbsoluteFilePath,
getFileLineInfoForCompileUnit(CU, LineTable, Address,
NeedsAbsoluteFilePath,
FileName, Line, Column);
}
return DILineInfo(StringRef(FileName), StringRef(FunctionName),
Line, Column);
}
DIInliningInfo DWARFContext::getInliningInfoForAddress(uint64_t Address,
DILineInfoSpecifier Specifier) {
DWARFCompileUnit *CU = getCompileUnitForAddress(Address);
if (!CU)
return DIInliningInfo();
const DWARFDebugInfoEntryMinimal::InlinedChain &InlinedChain =
CU->getInlinedChainForAddress(Address);
if (InlinedChain.size() == 0)
return DIInliningInfo();
DIInliningInfo InliningInfo;
uint32_t CallFile = 0, CallLine = 0, CallColumn = 0;
const DWARFDebugLine::LineTable *LineTable = 0;
for (uint32_t i = 0, n = InlinedChain.size(); i != n; i++) {
const DWARFDebugInfoEntryMinimal &FunctionDIE = InlinedChain[i];
std::string FileName = "<invalid>";
std::string FunctionName = "<invalid>";
uint32_t Line = 0;
uint32_t Column = 0;
// Get function name if necessary.
if (Specifier.needs(DILineInfoSpecifier::FunctionName)) {
if (const char *Name = FunctionDIE.getSubroutineName(CU))
FunctionName = Name;
}
if (Specifier.needs(DILineInfoSpecifier::FileLineInfo)) {
const bool NeedsAbsoluteFilePath =
Specifier.needs(DILineInfoSpecifier::AbsoluteFilePath);
if (i == 0) {
// For the topmost frame, initialize the line table of this
// compile unit and fetch file/line info from it.
LineTable = getLineTableForCompileUnit(CU);
// For the topmost routine, get file/line info from line table.
getFileLineInfoForCompileUnit(CU, LineTable, Address,
NeedsAbsoluteFilePath,
FileName, Line, Column);
} else {
// Otherwise, use call file, call line and call column from
// previous DIE in inlined chain.
getFileNameForCompileUnit(CU, LineTable, CallFile,
NeedsAbsoluteFilePath, FileName);
Line = CallLine;
Column = CallColumn;
}
// Get call file/line/column of a current DIE.
if (i + 1 < n) {
FunctionDIE.getCallerFrame(CU, CallFile, CallLine, CallColumn);
}
}
DILineInfo Frame(StringRef(FileName), StringRef(FunctionName),
Line, Column);
InliningInfo.addFrame(Frame);
}
return InliningInfo;
}
void DWARFContextInMemory::anchor() { }