Store compile unit corresponding to each chain of inlined debug info entries. No functionality change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187792 91177308-0d34-0410-b5e6-96231b3b80d8

5 files changed, 44 insertions, 39 deletions

diff --git a/lib/DebugInfo/DWARFCompileUnit.cpp b/lib/DebugInfo/DWARFCompileUnit.cpp
index ef3ddf9..93b1622 100644
--- a/lib/DebugInfo/DWARFCompileUnit.cpp
+++ b/lib/DebugInfo/DWARFCompileUnit.cpp
@@ -258,7 +258,7 @@ DWARFCompileUnit::buildAddressRangeTable(DWARFDebugAranges *debug_aranges,
     clearDIEs(true);
 }
 
-DWARFDebugInfoEntryMinimal::InlinedChain
+DWARFDebugInfoEntryInlinedChain
 DWARFCompileUnit::getInlinedChainForAddress(uint64_t Address) {
   // First, find a subprogram that contains the given address (the root
   // of inlined chain).
@@ -273,6 +273,6 @@ DWARFCompileUnit::getInlinedChainForAddress(uint64_t Address) {
   }
   // Get inlined chain rooted at this subprogram DIE.
   if (!SubprogramDIE)
-    return DWARFDebugInfoEntryMinimal::InlinedChain();
+    return DWARFDebugInfoEntryInlinedChain();
   return SubprogramDIE->getInlinedChainForAddress(this, Address);
 }
diff --git a/lib/DebugInfo/DWARFCompileUnit.h b/lib/DebugInfo/DWARFCompileUnit.h
index 071be90..dc2214b 100644
--- a/lib/DebugInfo/DWARFCompileUnit.h
+++ b/lib/DebugInfo/DWARFCompileUnit.h
@@ -112,9 +112,9 @@ public:
                               bool clear_dies_if_already_not_parsed);
 
   /// getInlinedChainForAddress - fetches inlined chain for a given address.
-  /// Returns empty chain if there is no subprogram containing address.
-  DWARFDebugInfoEntryMinimal::InlinedChain getInlinedChainForAddress(
-      uint64_t Address);
+  /// Returns empty chain if there is no subprogram containing address. The
+  /// chain is valid as long as parsed compile unit DIEs are not cleared.
+  DWARFDebugInfoEntryInlinedChain getInlinedChainForAddress(uint64_t Address);
 
 private:
   /// extractDIEsToVector - Appends all parsed DIEs to a vector.
diff --git a/lib/DebugInfo/DWARFContext.cpp b/lib/DebugInfo/DWARFContext.cpp
index 6ecd0a7..51ad645 100644
--- a/lib/DebugInfo/DWARFContext.cpp
+++ b/lib/DebugInfo/DWARFContext.cpp
@@ -376,11 +376,11 @@ DILineInfo DWARFContext::getLineInfoForAddress(uint64_t Address,
     // 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 =
+    const DWARFDebugInfoEntryInlinedChain &InlinedChain =
         CU->getInlinedChainForAddress(Address);
-    if (InlinedChain.size() > 0) {
-      const DWARFDebugInfoEntryMinimal &TopFunctionDIE = InlinedChain[0];
-      if (const char *Name = TopFunctionDIE.getSubroutineName(CU))
+    if (InlinedChain.DIEs.size() > 0) {
+      const DWARFDebugInfoEntryMinimal &TopFunctionDIE = InlinedChain.DIEs[0];
+      if (const char *Name = TopFunctionDIE.getSubroutineName(InlinedChain.CU))
         FunctionName = Name;
     }
   }
@@ -409,11 +409,11 @@ DILineInfoTable DWARFContext::getLineInfoForAddressRange(uint64_t Address,
     // 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 =
+    const DWARFDebugInfoEntryInlinedChain &InlinedChain =
         CU->getInlinedChainForAddress(Address);
-    if (InlinedChain.size() > 0) {
-      const DWARFDebugInfoEntryMinimal &TopFunctionDIE = InlinedChain[0];
-      if (const char *Name = TopFunctionDIE.getSubroutineName(CU))
+    if (InlinedChain.DIEs.size() > 0) {
+      const DWARFDebugInfoEntryMinimal &TopFunctionDIE = InlinedChain.DIEs[0];
+      if (const char *Name = TopFunctionDIE.getSubroutineName(InlinedChain.CU))
         FunctionName = Name;
     }
   }
@@ -423,8 +423,8 @@ DILineInfoTable DWARFContext::getLineInfoForAddressRange(uint64_t Address,
   // If the Specifier says we don't need FileLineInfo, just
   // return the top-most function at the starting address.
   if (!Specifier.needs(DILineInfoSpecifier::FileLineInfo)) {
-    Lines.push_back(std::make_pair(Address, 
-                                   DILineInfo(StringRef("<invalid>"), 
+    Lines.push_back(std::make_pair(Address,
+                                   DILineInfo(StringRef("<invalid>"),
                                               FuncNameRef, 0, 0)));
     return Lines;
   }
@@ -446,7 +446,7 @@ DILineInfoTable DWARFContext::getLineInfoForAddressRange(uint64_t Address,
     std::string FileName = "<invalid>";
     getFileNameForCompileUnit(CU, LineTable, Row.File,
                               NeedsAbsoluteFilePath, FileName);
-    Lines.push_back(std::make_pair(Row.Address, 
+    Lines.push_back(std::make_pair(Row.Address,
                                    DILineInfo(StringRef(FileName),
                                          FuncNameRef, Row.Line, Row.Column)));
   }
@@ -460,23 +460,23 @@ DIInliningInfo DWARFContext::getInliningInfoForAddress(uint64_t Address,
   if (!CU)
     return DIInliningInfo();
 
-  const DWARFDebugInfoEntryMinimal::InlinedChain &InlinedChain =
+  const DWARFDebugInfoEntryInlinedChain &InlinedChain =
       CU->getInlinedChainForAddress(Address);
-  if (InlinedChain.size() == 0)
+  if (InlinedChain.DIEs.size() == 0)
     return DIInliningInfo();
 
   DIInliningInfo InliningInfo;
   uint32_t CallFile = 0, CallLine = 0, CallColumn = 0;
   const DWARFLineTable *LineTable = 0;
-  for (uint32_t i = 0, n = InlinedChain.size(); i != n; i++) {
-    const DWARFDebugInfoEntryMinimal &FunctionDIE = InlinedChain[i];
+  for (uint32_t i = 0, n = InlinedChain.DIEs.size(); i != n; i++) {
+    const DWARFDebugInfoEntryMinimal &FunctionDIE = InlinedChain.DIEs[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))
+      if (const char *Name = FunctionDIE.getSubroutineName(InlinedChain.CU))
         FunctionName = Name;
     }
     if (Specifier.needs(DILineInfoSpecifier::FileLineInfo)) {
@@ -500,7 +500,8 @@ DIInliningInfo DWARFContext::getInliningInfoForAddress(uint64_t Address,
       }
       // Get call file/line/column of a current DIE.
       if (i + 1 < n) {
-        FunctionDIE.getCallerFrame(CU, CallFile, CallLine, CallColumn);
+        FunctionDIE.getCallerFrame(InlinedChain.CU, CallFile, CallLine,
+                                   CallColumn);
       }
     }
     DILineInfo Frame(StringRef(FileName), StringRef(FunctionName),
diff --git a/lib/DebugInfo/DWARFDebugInfoEntry.cpp b/lib/DebugInfo/DWARFDebugInfoEntry.cpp
index 10be7b4..0c7b7e3 100644
--- a/lib/DebugInfo/DWARFDebugInfoEntry.cpp
+++ b/lib/DebugInfo/DWARFDebugInfoEntry.cpp
@@ -366,19 +366,18 @@ void DWARFDebugInfoEntryMinimal::getCallerFrame(const DWARFCompileUnit *CU,
   CallColumn = getAttributeValueAsUnsigned(CU, DW_AT_call_column, 0);
 }
 
-DWARFDebugInfoEntryMinimal::InlinedChain
+DWARFDebugInfoEntryInlinedChain
 DWARFDebugInfoEntryMinimal::getInlinedChainForAddress(
-                                                     const DWARFCompileUnit *CU,
-                                                     const uint64_t Address)
-                                                     const {
-  DWARFDebugInfoEntryMinimal::InlinedChain InlinedChain;
+    const DWARFCompileUnit *CU, const uint64_t Address) const {
+  DWARFDebugInfoEntryInlinedChain InlinedChain;
+  InlinedChain.CU = CU;
   if (isNULL())
     return InlinedChain;
   for (const DWARFDebugInfoEntryMinimal *DIE = this; DIE; ) {
     // Append current DIE to inlined chain only if it has correct tag
     // (e.g. it is not a lexical block).
     if (DIE->isSubroutineDIE()) {
-      InlinedChain.push_back(*DIE);
+      InlinedChain.DIEs.push_back(*DIE);
     }
     // Try to get child which also contains provided address.
     const DWARFDebugInfoEntryMinimal *Child = DIE->getFirstChild();
@@ -392,6 +391,6 @@ DWARFDebugInfoEntryMinimal::getInlinedChainForAddress(
     DIE = Child;
   }
   // Reverse the obtained chain to make the root of inlined chain last.
-  std::reverse(InlinedChain.begin(), InlinedChain.end());
+  std::reverse(InlinedChain.DIEs.begin(), InlinedChain.DIEs.end());
   return InlinedChain;
 }
diff --git a/lib/DebugInfo/DWARFDebugInfoEntry.h b/lib/DebugInfo/DWARFDebugInfoEntry.h
index 9003591..a69911f 100644
--- a/lib/DebugInfo/DWARFDebugInfoEntry.h
+++ b/lib/DebugInfo/DWARFDebugInfoEntry.h
@@ -20,7 +20,7 @@ class DWARFDebugAranges;
 class DWARFCompileUnit;
 class DWARFContext;
 class DWARFFormValue;
-class DWARFInlinedSubroutineChain;
+struct DWARFDebugInfoEntryInlinedChain;
 
 /// DWARFDebugInfoEntryMinimal - A DIE with only the minimum required data.
 class DWARFDebugInfoEntryMinimal {
@@ -162,18 +162,23 @@ public:
   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;
+  DWARFDebugInfoEntryInlinedChain
+  getInlinedChainForAddress(const DWARFCompileUnit *CU,
+                            const uint64_t Address) const;
+};
+
+/// DWARFDebugInfoEntryInlinedChain - 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.
+struct DWARFDebugInfoEntryInlinedChain {
+  DWARFDebugInfoEntryInlinedChain() : CU(0) {}
+  SmallVector<DWARFDebugInfoEntryMinimal, 4> DIEs;
+  const DWARFCompileUnit *CU;
 };
 
 }