[llvm] r218125 - Turn local DWARFContext helpers getFileNameForUnit() and getFileLineInfoForCompileUnit() into full-blowm DWARFDebugLine::LineTable methods.
Frederic Riss
friss at apple.com
Fri Sep 19 08:11:52 PDT 2014
Author: friss
Date: Fri Sep 19 10:11:51 2014
New Revision: 218125
URL: http://llvm.org/viewvc/llvm-project?rev=218125&view=rev
Log:
Turn local DWARFContext helpers getFileNameForUnit() and getFileLineInfoForCompileUnit() into full-blowm DWARFDebugLine::LineTable methods.
Summary:
getFileNameForUnit() is basically a wrapper around LineTable::getFileNameByIndex().
Fold its additional functionality (adding the DWARFUnit compilation dir) into
LineTable::getFileNameByIndex().
getFileLineInfoForCompileUnit() is a wrapper around getFileNameForUnit(). As
a function to search the line information by address, it seems natural to put
it in the LineTable also.
Before this commit only the Context with its private helpers could do Linetable
lookups. This newly exposed feature will be used by the DIE dumping code to
get access to file information referenced in DIE attributes.
This commit has already been partly reviewed in D5192 and contained an
additional and a bit controversial 'realpath' call that is left out of this
patch. We can reinstate that realpath code later if it is desirable.
Test Plan:
The patch contains no tests as it should be functionally equivalent to the
previous code. As requested in the last review, I checked if the relative
path handling copied from the Context to LineTable::getFileNameByIndex()
was covered, and indeed the symbolizer tests fail if it is removed.
Reviewers: dblaikie, echristo, aprantl, samsonov
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D5354
Modified:
llvm/trunk/lib/DebugInfo/DWARFContext.cpp
llvm/trunk/lib/DebugInfo/DWARFDebugLine.cpp
llvm/trunk/lib/DebugInfo/DWARFDebugLine.h
Modified: llvm/trunk/lib/DebugInfo/DWARFContext.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/DebugInfo/DWARFContext.cpp?rev=218125&r1=218124&r2=218125&view=diff
==============================================================================
--- llvm/trunk/lib/DebugInfo/DWARFContext.cpp (original)
+++ llvm/trunk/lib/DebugInfo/DWARFContext.cpp Fri Sep 19 10:11:51 2014
@@ -401,47 +401,6 @@ DWARFCompileUnit *DWARFContext::getCompi
return getCompileUnitForOffset(CUOffset);
}
-static bool getFileNameForUnit(DWARFCompileUnit *U,
- const DWARFLineTable *LineTable,
- uint64_t FileIndex, FileLineInfoKind Kind,
- std::string &FileName) {
- if (!U || !LineTable || Kind == FileLineInfoKind::None ||
- !LineTable->getFileNameByIndex(FileIndex, Kind, FileName))
- return false;
- if (Kind == FileLineInfoKind::AbsoluteFilePath &&
- sys::path::is_relative(FileName)) {
- // We may still need to append compilation directory of compile unit.
- SmallString<16> AbsolutePath;
- if (const char *CompilationDir = U->getCompilationDir()) {
- sys::path::append(AbsolutePath, CompilationDir);
- }
- sys::path::append(AbsolutePath, FileName);
- FileName = AbsolutePath.str();
- }
- return true;
-}
-
-static bool getFileLineInfoForCompileUnit(DWARFCompileUnit *CU,
- const DWARFLineTable *LineTable,
- uint64_t Address,
- FileLineInfoKind Kind,
- DILineInfo &Result) {
- if (!CU || !LineTable)
- return false;
- // Get the index of row we're looking for in the line table.
- uint32_t RowIndex = LineTable->lookupAddress(Address);
- if (RowIndex == -1U)
- return false;
- // Take file number and line/column from the row.
- const DWARFDebugLine::Row &Row = LineTable->Rows[RowIndex];
- if (!getFileNameForUnit(CU, LineTable, Row.File, Kind,
- Result.FileName))
- return false;
- Result.Line = Row.Line;
- Result.Column = Row.Column;
- return true;
-}
-
static bool getFunctionNameForAddress(DWARFCompileUnit *CU, uint64_t Address,
FunctionNameKind Kind,
std::string &FunctionName) {
@@ -472,8 +431,9 @@ DILineInfo DWARFContext::getLineInfoForA
return Result;
getFunctionNameForAddress(CU, Address, Spec.FNKind, Result.FunctionName);
if (Spec.FLIKind != FileLineInfoKind::None) {
- const DWARFLineTable *LineTable = getLineTableForUnit(CU);
- getFileLineInfoForCompileUnit(CU, LineTable, Address, Spec.FLIKind, Result);
+ if (const DWARFLineTable *LineTable = getLineTableForUnit(CU))
+ LineTable->getFileLineInfoForAddress(Address, CU->getCompilationDir(),
+ Spec.FLIKind, Result);
}
return Result;
}
@@ -509,8 +469,8 @@ DWARFContext::getLineInfoForAddressRange
// Take file number and line/column from the row.
const DWARFDebugLine::Row &Row = LineTable->Rows[RowIndex];
DILineInfo Result;
- getFileNameForUnit(CU, LineTable, Row.File, Spec.FLIKind,
- Result.FileName);
+ LineTable->getFileNameByIndex(Row.File, CU->getCompilationDir(),
+ Spec.FLIKind, Result.FileName);
Result.FunctionName = FunctionName;
Result.Line = Row.Line;
Result.Column = Row.Column;
@@ -538,10 +498,10 @@ DWARFContext::getInliningInfoForAddress(
if (Spec.FLIKind != FileLineInfoKind::None) {
DILineInfo Frame;
LineTable = getLineTableForUnit(CU);
- if (getFileLineInfoForCompileUnit(CU, LineTable, Address, Spec.FLIKind,
- Frame)) {
+ if (LineTable &&
+ LineTable->getFileLineInfoForAddress(Address, CU->getCompilationDir(),
+ Spec.FLIKind, Frame))
InliningInfo.addFrame(Frame);
- }
}
return InliningInfo;
}
@@ -560,13 +520,15 @@ DWARFContext::getInliningInfoForAddress(
// compile unit and fetch file/line info from it.
LineTable = getLineTableForUnit(CU);
// For the topmost routine, get file/line info from line table.
- getFileLineInfoForCompileUnit(CU, LineTable, Address, Spec.FLIKind,
- Frame);
+ if (LineTable)
+ LineTable->getFileLineInfoForAddress(Address, CU->getCompilationDir(),
+ Spec.FLIKind, Frame);
} else {
// Otherwise, use call file, call line and call column from
// previous DIE in inlined chain.
- getFileNameForUnit(CU, LineTable, CallFile, Spec.FLIKind,
- Frame.FileName);
+ if (LineTable)
+ LineTable->getFileNameByIndex(CallFile, CU->getCompilationDir(),
+ Spec.FLIKind, Frame.FileName);
Frame.Line = CallLine;
Frame.Column = CallColumn;
}
Modified: llvm/trunk/lib/DebugInfo/DWARFDebugLine.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/DebugInfo/DWARFDebugLine.cpp?rev=218125&r1=218124&r2=218125&view=diff
==============================================================================
--- llvm/trunk/lib/DebugInfo/DWARFDebugLine.cpp (original)
+++ llvm/trunk/lib/DebugInfo/DWARFDebugLine.cpp Fri Sep 19 10:11:51 2014
@@ -644,6 +644,7 @@ bool DWARFDebugLine::LineTable::lookupAd
bool
DWARFDebugLine::LineTable::getFileNameByIndex(uint64_t FileIndex,
+ const char *CompDir,
FileLineInfoKind Kind,
std::string &Result) const {
if (FileIndex == 0 || FileIndex > Prologue.FileNames.size() ||
@@ -656,15 +657,42 @@ DWARFDebugLine::LineTable::getFileNameBy
Result = FileName;
return true;
}
+
SmallString<16> FilePath;
uint64_t IncludeDirIndex = Entry.DirIdx;
+ const char *IncludeDir = "";
// Be defensive about the contents of Entry.
if (IncludeDirIndex > 0 &&
- IncludeDirIndex <= Prologue.IncludeDirectories.size()) {
- const char *IncludeDir = Prologue.IncludeDirectories[IncludeDirIndex - 1];
- sys::path::append(FilePath, IncludeDir);
- }
- sys::path::append(FilePath, FileName);
+ IncludeDirIndex <= Prologue.IncludeDirectories.size())
+ IncludeDir = Prologue.IncludeDirectories[IncludeDirIndex - 1];
+
+ // We may still need to append compilation directory of compile unit.
+ // We know that FileName is not absolute, the only way to have an
+ // absolute path at this point would be if IncludeDir is absolute.
+ if (CompDir && Kind == FileLineInfoKind::AbsoluteFilePath &&
+ sys::path::is_relative(IncludeDir))
+ sys::path::append(FilePath, CompDir);
+
+ // sys::path::append skips empty strings.
+ sys::path::append(FilePath, IncludeDir, FileName);
Result = FilePath.str();
return true;
}
+
+bool
+DWARFDebugLine::LineTable::getFileLineInfoForAddress(uint64_t Address,
+ const char *CompDir,
+ FileLineInfoKind Kind,
+ DILineInfo &Result) const {
+ // Get the index of row we're looking for in the line table.
+ uint32_t RowIndex = lookupAddress(Address);
+ if (RowIndex == -1U)
+ return false;
+ // Take file number and line/column from the row.
+ const auto &Row = Rows[RowIndex];
+ if (!getFileNameByIndex(Row.File, CompDir, Kind, Result.FileName))
+ return false;
+ Result.Line = Row.Line;
+ Result.Column = Row.Column;
+ return true;
+}
Modified: llvm/trunk/lib/DebugInfo/DWARFDebugLine.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/DebugInfo/DWARFDebugLine.h?rev=218125&r1=218124&r2=218125&view=diff
==============================================================================
--- llvm/trunk/lib/DebugInfo/DWARFDebugLine.h (original)
+++ llvm/trunk/lib/DebugInfo/DWARFDebugLine.h Fri Sep 19 10:11:51 2014
@@ -179,10 +179,16 @@ public:
// Extracts filename by its index in filename table in prologue.
// Returns true on success.
- bool getFileNameByIndex(uint64_t FileIndex,
+ bool getFileNameByIndex(uint64_t FileIndex, const char *CompDir,
DILineInfoSpecifier::FileLineInfoKind Kind,
std::string &Result) const;
+ // Fills the Result argument with the file and line information
+ // corresponding to Address. Returns true on success.
+ bool getFileLineInfoForAddress(uint64_t Address, const char *CompDir,
+ DILineInfoSpecifier::FileLineInfoKind Kind,
+ DILineInfo &Result) const;
+
void dump(raw_ostream &OS) const;
void clear();
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