llvm-6502/include/llvm/Support/DebugLoc.h
Jeffrey Yasskin 32360a7e21 Add line numbers to OProfile. To do this, I added a processDebugLoc()
call to the MachineCodeEmitter interface and made copying the start
line of a function not conditional on whether we're emitting Dwarf
debug information. I'll propagate the processDebugLoc() calls to the
non-X86 targets in a followup patch.

In the long run, it'll probably be better to gather this information
through the DwarfWriter, but the DwarfWriter currently depends on the
AsmPrinter and TargetAsmInfo, and fixing that would be out of the way
for this patch.

There's a bug in OProfile 0.9.4 that makes it ignore line numbers for
addresses above 4G, and a patch fixing it at
http://thread.gmane.org/gmane.linux.oprofile/7634

Sample output:

$ sudo opcontrol --reset; sudo opcontrol --start-daemon; sudo opcontrol --start; `pwd`/Debug/bin/lli fib.bc; sudo opcontrol --stop
Signalling daemon... done
Profiler running.
fib(40) == 165580141
Stopping profiling.

$ opreport -g -d -l `pwd`/Debug/bin/lli|head -60
Overflow stats not available
CPU: Core 2, speed 1998 MHz (estimated)
Counted CPU_CLK_UNHALTED events (Clock cycles when not halted) with a unit mask of 0x00 (Unhalted core cycles) count 100000
vma      samples  %        linenr info                 image name               symbol name
00007f67a30370b0 25489    61.2554  fib.c:24                    10946.jo                 fib_left
  00007f67a30370b0 1634      6.4106  fib.c:24
  00007f67a30370b1 83        0.3256  fib.c:24
  00007f67a30370b9 1997      7.8348  fib.c:24
  00007f67a30370c6 2080      8.1604  fib.c:27
  00007f67a30370c8 988       3.8762  fib.c:27
  00007f67a30370cd 1315      5.1591  fib.c:27
  00007f67a30370cf 251       0.9847  fib.c:27
  00007f67a30370d3 1191      4.6726  fib.c:27
  00007f67a30370d6 975       3.8252  fib.c:27
  00007f67a30370db 1010      3.9625  fib.c:27
  00007f67a30370dd 242       0.9494  fib.c:27
  00007f67a30370e1 2782     10.9145  fib.c:28
  00007f67a30370e5 3768     14.7828  fib.c:28
  00007f67a30370eb 615       2.4128  (no location information)
  00007f67a30370f3 6558     25.7287  (no location information)
00007f67a3037100 15603    37.4973  fib.c:29                    10946.jo                 fib_right
  00007f67a3037100 1646     10.5493  fib.c:29
  00007f67a3037101 45        0.2884  fib.c:29
  00007f67a3037109 2372     15.2022  fib.c:29
  00007f67a3037116 2234     14.3178  fib.c:32
  00007f67a3037118 612       3.9223  fib.c:32
  00007f67a303711d 622       3.9864  fib.c:32
  00007f67a303711f 385       2.4675  fib.c:32
  00007f67a3037123 404       2.5892  fib.c:32
  00007f67a3037126 634       4.0633  fib.c:32
  00007f67a303712b 870       5.5759  fib.c:32
  00007f67a303712d 62        0.3974  fib.c:32
  00007f67a3037131 1848     11.8439  fib.c:33
  00007f67a3037135 2840     18.2016  fib.c:33
  00007f67a303713a 1         0.0064  fib.c:33
  00007f67a303713b 1023      6.5564  (no location information)
  00007f67a3037143 5         0.0320  (no location information)
000000000080c1e4 15        0.0360  MachineOperand.h:150        lli                      llvm::MachineOperand::isReg() const
  000000000080c1e4 6        40.0000  MachineOperand.h:150
  000000000080c1ec 2        13.3333  MachineOperand.h:150
...



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76102 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-16 21:07:26 +00:00

105 lines
3.3 KiB
C++

//===---- llvm/DebugLoc.h - Debug Location Information ----------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines a number of light weight data structures used
// to describe and track debug location information.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_DEBUGLOC_H
#define LLVM_DEBUGLOC_H
#include "llvm/ADT/DenseMap.h"
#include <vector>
namespace llvm {
class GlobalVariable;
/// DebugLocTuple - Debug location tuple of filename id, line and column.
///
struct DebugLocTuple {
GlobalVariable *CompileUnit;
unsigned Line, Col;
DebugLocTuple()
: CompileUnit(0), Line(~0U), Col(~0U) {};
DebugLocTuple(GlobalVariable *v, unsigned l, unsigned c)
: CompileUnit(v), Line(l), Col(c) {};
bool operator==(const DebugLocTuple &DLT) const {
return CompileUnit == DLT.CompileUnit &&
Line == DLT.Line && Col == DLT.Col;
}
bool operator!=(const DebugLocTuple &DLT) const {
return !(*this == DLT);
}
};
/// DebugLoc - Debug location id. This is carried by SDNode and MachineInstr
/// to index into a vector of unique debug location tuples.
class DebugLoc {
unsigned Idx;
public:
DebugLoc() : Idx(~0U) {} // Defaults to invalid.
static DebugLoc getUnknownLoc() { DebugLoc L; L.Idx = ~0U; return L; }
static DebugLoc get(unsigned idx) { DebugLoc L; L.Idx = idx; return L; }
unsigned getIndex() const { return Idx; }
/// isUnknown - Return true if there is no debug info for the SDNode /
/// MachineInstr.
bool isUnknown() const { return Idx == ~0U; }
bool operator==(const DebugLoc &DL) const { return Idx == DL.Idx; }
bool operator!=(const DebugLoc &DL) const { return !(*this == DL); }
};
// Partially specialize DenseMapInfo for DebugLocTyple.
template<> struct DenseMapInfo<DebugLocTuple> {
static inline DebugLocTuple getEmptyKey() {
return DebugLocTuple(0, ~0U, ~0U);
}
static inline DebugLocTuple getTombstoneKey() {
return DebugLocTuple((GlobalVariable*)~1U, ~1U, ~1U);
}
static unsigned getHashValue(const DebugLocTuple &Val) {
return DenseMapInfo<GlobalVariable*>::getHashValue(Val.CompileUnit) ^
DenseMapInfo<unsigned>::getHashValue(Val.Line) ^
DenseMapInfo<unsigned>::getHashValue(Val.Col);
}
static bool isEqual(const DebugLocTuple &LHS, const DebugLocTuple &RHS) {
return LHS.CompileUnit == RHS.CompileUnit &&
LHS.Line == RHS.Line &&
LHS.Col == RHS.Col;
}
static bool isPod() { return true; }
};
/// DebugLocTracker - This class tracks debug location information.
///
struct DebugLocTracker {
/// DebugLocations - A vector of unique DebugLocTuple's.
///
std::vector<DebugLocTuple> DebugLocations;
/// DebugIdMap - This maps DebugLocTuple's to indices into the
/// DebugLocations vector.
DenseMap<DebugLocTuple, unsigned> DebugIdMap;
DebugLocTracker() {}
};
} // end namespace llvm
#endif /* LLVM_DEBUGLOC_H */