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Emit function debug frames in one atom. This will prevent us from generating incorrect assembler in case of both

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debug information & exception information presented.

llvm-svn: 37019
This commit is contained in:
Anton Korobeynikov 2007-05-13 17:30:11 +00:00
parent 100919126f
commit ad0dd14386
1 changed files with 41 additions and 27 deletions
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64
lib/CodeGen/DwarfWriter.cpp
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@ -1110,6 +1110,16 @@ private:
///
bool shouldEmit;
struct FunctionDebugFrameInfo {
unsigned Number;
std::vector<MachineMove> Moves;
FunctionDebugFrameInfo(unsigned Num, const std::vector<MachineMove> &M):
Number(Num), Moves(M) { };
};
std::vector<FunctionDebugFrameInfo> DebugFrames;
public:
/// ShouldEmitDwarf - Returns true if Dwarf declarations should be made.
@ -1957,7 +1967,7 @@ private:
// Dwarf sections base addresses.
if (TAI->doesDwarfRequireFrameSection()) {
Asm->SwitchToDataSection(TAI->getDwarfFrameSection());
EmitLabel("section_frame", 0);
EmitLabel("section_debug_frame", 0);
}
Asm->SwitchToDataSection(TAI->getDwarfInfoSection());
EmitLabel("section_info", 0);
@ -1982,9 +1992,6 @@ private:
EmitLabel("text_begin", 0);
Asm->SwitchToDataSection(TAI->getDataSection());
EmitLabel("data_begin", 0);
// Emit common frame information.
EmitInitialDebugFrame();
}
/// EmitDIE - Recusively Emits a debug information entry.
@ -2321,9 +2328,9 @@ private:
Asm->EOL();
}
/// EmitInitialDebugFrame - Emit common frame info into a debug frame section.
/// EmitCommonDebugFrame - Emit common frame info into a debug frame section.
///
void EmitInitialDebugFrame() {
void EmitCommonDebugFrame() {
if (!TAI->doesDwarfRequireFrameSection())
return;
@ -2335,12 +2342,12 @@ private:
// Start the dwarf frame section.
Asm->SwitchToDataSection(TAI->getDwarfFrameSection());
EmitLabel("frame_common", 0);
EmitDifference("frame_common_end", 0,
"frame_common_begin", 0, true);
EmitLabel("debug_frame_common", 0);
EmitDifference("debug_frame_common_end", 0,
"debug_frame_common_begin", 0, true);
Asm->EOL("Length of Common Information Entry");
EmitLabel("frame_common_begin", 0);
EmitLabel("debug_frame_common_begin", 0);
Asm->EmitInt32((int)DW_CIE_ID);
Asm->EOL("CIE Identifier Tag");
Asm->EmitInt8(DW_CIE_VERSION);
@ -2360,41 +2367,40 @@ private:
EmitFrameMoves(NULL, 0, Moves);
Asm->EmitAlignment(2);
EmitLabel("frame_common_end", 0);
EmitLabel("debug_frame_common_end", 0);
Asm->EOL();
}
/// EmitFunctionDebugFrame - Emit per function frame info into a debug frame
/// section.
void EmitFunctionDebugFrame() {
void EmitFunctionDebugFrame(const FunctionDebugFrameInfo &DebugFrameInfo) {
if (!TAI->doesDwarfRequireFrameSection())
return;
// Start the dwarf frame section.
Asm->SwitchToDataSection(TAI->getDwarfFrameSection());
EmitDifference("frame_end", SubprogramCount,
"frame_begin", SubprogramCount, true);
EmitDifference("debug_frame_end", DebugFrameInfo.Number,
"debug_frame_begin", DebugFrameInfo.Number, true);
Asm->EOL("Length of Frame Information Entry");
EmitLabel("frame_begin", SubprogramCount);
EmitLabel("debug_frame_begin", DebugFrameInfo.Number);
EmitSectionOffset("frame_common", "section_frame", 0, 0, true, false);
EmitSectionOffset("debug_frame_common", "section_debug_frame",
0, 0, true, false);
Asm->EOL("FDE CIE offset");
EmitReference("func_begin", SubprogramCount);
EmitReference("func_begin", DebugFrameInfo.Number);
Asm->EOL("FDE initial location");
EmitDifference("func_end", SubprogramCount,
"func_begin", SubprogramCount);
EmitDifference("func_end", DebugFrameInfo.Number,
"func_begin", DebugFrameInfo.Number);
Asm->EOL("FDE address range");
std::vector<MachineMove> &Moves = MMI->getFrameMoves();
EmitFrameMoves("func_begin", SubprogramCount, Moves);
EmitFrameMoves("func_begin", DebugFrameInfo.Number, DebugFrameInfo.Moves);
Asm->EmitAlignment(2);
EmitLabel("frame_end", SubprogramCount);
EmitLabel("debug_frame_end", DebugFrameInfo.Number);
Asm->EOL();
}
@ -2637,6 +2643,14 @@ public:
EmitLabel("section_end", i);
}
// Emit common frame information.
EmitCommonDebugFrame();
// Emit function debug frame information
for (std::vector<FunctionDebugFrameInfo>::iterator I = DebugFrames.begin(),
E = DebugFrames.end(); I != E; ++I)
EmitFunctionDebugFrame(*I);
// Compute DIE offsets and sizes.
SizeAndOffsets();
@ -2706,8 +2720,8 @@ public:
// Construct scopes for subprogram.
ConstructRootScope(MMI->getRootScope());
// Emit function frame information.
EmitFunctionDebugFrame();
DebugFrames.push_back(FunctionDebugFrameInfo(SubprogramCount,
MMI->getFrameMoves()));
}
};