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ftmemsim-valgrind/callgrind/main.c
Julian Seward 5679a22410 Update copyright dates ("200X-2007" --> "200X-2008"). 
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@7398
2008-02-11 11:34:59 +00:00

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/*--------------------------------------------------------------------*/
/*--- Callgrind ---*/
/*--- main.c ---*/
/*--------------------------------------------------------------------*/
/*
This file is part of Callgrind, a Valgrind tool for call graph
profiling programs.
Copyright (C) 2002-2008, Josef Weidendorfer (Josef.Weidendorfer@gmx.de)
This tool is derived from and contains code from Cachegrind
Copyright (C) 2002-2008 Nicholas Nethercote (njn@valgrind.org)
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307, USA.
The GNU General Public License is contained in the file COPYING.
*/
#include "config.h"
#include "callgrind.h"
#include "global.h"
#include <pub_tool_threadstate.h>
/*------------------------------------------------------------*/
/*--- Global variables ---*/
/*------------------------------------------------------------*/
/* for all threads */
CommandLineOptions CLG_(clo);
Statistics CLG_(stat);
Bool CLG_(instrument_state) = True; /* Instrumentation on ? */
/* thread and signal handler specific */
exec_state CLG_(current_state);
/*------------------------------------------------------------*/
/*--- Statistics ---*/
/*------------------------------------------------------------*/
static void CLG_(init_statistics)(Statistics* s)
{
s->call_counter = 0;
s->jcnd_counter = 0;
s->jump_counter = 0;
s->rec_call_counter = 0;
s->ret_counter = 0;
s->bb_executions = 0;
s->context_counter = 0;
s->bb_retranslations = 0;
s->distinct_objs = 0;
s->distinct_files = 0;
s->distinct_fns = 0;
s->distinct_contexts = 0;
s->distinct_bbs = 0;
s->distinct_bbccs = 0;
s->distinct_instrs = 0;
s->distinct_skips = 0;
s->bb_hash_resizes = 0;
s->bbcc_hash_resizes = 0;
s->jcc_hash_resizes = 0;
s->cxt_hash_resizes = 0;
s->fn_array_resizes = 0;
s->call_stack_resizes = 0;
s->fn_stack_resizes = 0;
s->full_debug_BBs = 0;
s->file_line_debug_BBs = 0;
s->fn_name_debug_BBs = 0;
s->no_debug_BBs = 0;
s->bbcc_lru_misses = 0;
s->jcc_lru_misses = 0;
s->cxt_lru_misses = 0;
s->bbcc_clones = 0;
}
/*------------------------------------------------------------*/
/*--- Cache simulation instrumentation phase ---*/
/*------------------------------------------------------------*/
static Bool loadStoreAddrsMatch(IRExpr* loadAddrExpr, IRExpr* storeAddrExpr)
{
// I'm assuming that for 'modify' instructions, that Vex always makes
// the loadAddrExpr and storeAddrExpr be of the same type, ie. both Tmp
// expressions, or both Const expressions.
CLG_ASSERT(isIRAtom(loadAddrExpr));
CLG_ASSERT(isIRAtom(storeAddrExpr));
return eqIRAtom(loadAddrExpr, storeAddrExpr);
}
static
EventSet* insert_simcall(IRSB* bbOut, InstrInfo* ii, UInt dataSize,
Bool instrIssued,
IRExpr* loadAddrExpr, IRExpr* storeAddrExpr)
{
HChar* helperName;
void* helperAddr;
Int argc;
EventSet* es;
IRExpr *arg1, *arg2 = 0, *arg3 = 0, **argv;
IRDirty* di;
/* Check type of original instruction regarding memory access,
* and collect info to be able to generate fitting helper call
*/
if (!loadAddrExpr && !storeAddrExpr) {
// no load/store
CLG_ASSERT(0 == dataSize);
if (instrIssued) {
helperName = 0;
helperAddr = 0;
}
else {
helperName = CLG_(cachesim).log_1I0D_name;
helperAddr = CLG_(cachesim).log_1I0D;
}
argc = 1;
es = CLG_(sets).D0;
} else if (loadAddrExpr && !storeAddrExpr) {
// load
CLG_ASSERT( isIRAtom(loadAddrExpr) );
if (instrIssued) {
helperName = CLG_(cachesim).log_0I1Dr_name;
helperAddr = CLG_(cachesim).log_0I1Dr;
}
else {
helperName = CLG_(cachesim).log_1I1Dr_name;
helperAddr = CLG_(cachesim).log_1I1Dr;
}
argc = 2;
arg2 = loadAddrExpr;
es = CLG_(sets).D1r;
} else if (!loadAddrExpr && storeAddrExpr) {
// store
CLG_ASSERT( isIRAtom(storeAddrExpr) );
if (instrIssued) {
helperName = CLG_(cachesim).log_0I1Dw_name;
helperAddr = CLG_(cachesim).log_0I1Dw;
}
else {
helperName = CLG_(cachesim).log_1I1Dw_name;
helperAddr = CLG_(cachesim).log_1I1Dw;
}
argc = 2;
arg2 = storeAddrExpr;
es = CLG_(sets).D1w;
} else {
CLG_ASSERT( loadAddrExpr && storeAddrExpr );
CLG_ASSERT( isIRAtom(loadAddrExpr) );
CLG_ASSERT( isIRAtom(storeAddrExpr) );
if ( loadStoreAddrsMatch(loadAddrExpr, storeAddrExpr) ) {
/* modify: suppose write access, as this is
* more resource consuming (as in callgrind for VG2)
* Cachegrind does a read here (!)
* DISCUSS: Best way depends on simulation model?
*/
if (instrIssued) {
helperName = CLG_(cachesim).log_0I1Dw_name;
helperAddr = CLG_(cachesim).log_0I1Dw;
}
else {
helperName = CLG_(cachesim).log_1I1Dw_name;
helperAddr = CLG_(cachesim).log_1I1Dw;
}
argc = 2;
arg2 = storeAddrExpr;
es = CLG_(sets).D1w;
} else {
// load/store
if (instrIssued) {
helperName = CLG_(cachesim).log_0I2D_name;
helperAddr = CLG_(cachesim).log_0I2D;
}
else {
helperName = CLG_(cachesim).log_1I2D_name;
helperAddr = CLG_(cachesim).log_1I2D;
}
argc = 3;
arg2 = loadAddrExpr;
arg3 = storeAddrExpr;
es = CLG_(sets).D2;
}
}
/* helper could be unset depending on the simulator used */
if (helperAddr == 0) return 0;
/* Setup 1st arg: InstrInfo */
arg1 = mkIRExpr_HWord( (HWord)ii );
// Add call to the instrumentation function
if (argc == 1)
argv = mkIRExprVec_1(arg1);
else if (argc == 2)
argv = mkIRExprVec_2(arg1, arg2);
else if (argc == 3)
argv = mkIRExprVec_3(arg1, arg2, arg3);
else
VG_(tool_panic)("argc... not 1 or 2 or 3?");
di = unsafeIRDirty_0_N( argc, helperName,
VG_(fnptr_to_fnentry)( helperAddr ), argv);
addStmtToIRSB( bbOut, IRStmt_Dirty(di) );
return es;
}
/* Instrumentation before a conditional jump or at the end
* of each original instruction.
* Fills the InstrInfo struct if not seen before
*/
static
void endOfInstr(IRSB* bbOut, InstrInfo* ii, Bool bb_seen_before,
UInt instr_offset, UInt instrLen, UInt dataSize,
UInt* cost_offset, Bool instrIssued,
IRExpr* loadAddrExpr, IRExpr* storeAddrExpr)
{
IRType wordTy;
EventSet* es;
// Stay sane ...
CLG_ASSERT(sizeof(HWord) == sizeof(void*));
if (sizeof(HWord) == 4) {
wordTy = Ity_I32;
} else
if (sizeof(HWord) == 8) {
wordTy = Ity_I64;
} else {
VG_(tool_panic)("endOfInstr: strange word size");
}
if (loadAddrExpr)
CLG_ASSERT(wordTy == typeOfIRExpr(bbOut->tyenv, loadAddrExpr));
if (storeAddrExpr)
CLG_ASSERT(wordTy == typeOfIRExpr(bbOut->tyenv, storeAddrExpr));
// Large (eg. 28B, 108B, 512B on x86) data-sized instructions will be
// done inaccurately, but they're very rare and this avoids errors from
// hitting more than two cache lines in the simulation.
if (dataSize > MIN_LINE_SIZE) dataSize = MIN_LINE_SIZE;
/* returns 0 if simulator needs no instrumentation */
es = insert_simcall(bbOut, ii, dataSize, instrIssued,
loadAddrExpr, storeAddrExpr);
CLG_DEBUG(5, " Instr +%2d (Size %d, DSize %d): ESet %s (Size %d)\n",
instr_offset, instrLen, dataSize,
es ? es->name : (Char*)"(no instrumentation)",
es ? es->size : 0);
if (bb_seen_before) {
CLG_DEBUG(5, " before: Instr +%2d (Size %d, DSize %d)\n",
ii->instr_offset, ii->instr_size, ii->data_size);
CLG_ASSERT(ii->instr_offset == instr_offset);
CLG_ASSERT(ii->instr_size == instrLen);
CLG_ASSERT(ii->cost_offset == *cost_offset);
CLG_ASSERT(ii->eventset == es);
/* Only check size if data size >0.
* This is needed: e.g. for rep or cmov x86 instructions, the same InstrInfo
* is used both for 2 simulator calls: for the pure instruction fetch and
* separately for an memory access (which may not happen depending on flags).
* If checked always, this triggers an assertion failure on retranslation.
*/
if (dataSize>0) CLG_ASSERT(ii->data_size == dataSize);
}
else {
ii->instr_offset = instr_offset;
ii->instr_size = instrLen;
ii->cost_offset = *cost_offset;
ii->eventset = es;
/* data size only relevant if >0 */
if (dataSize > 0) ii->data_size = dataSize;
CLG_(stat).distinct_instrs++;
}
*cost_offset += es ? es->size : 0;
}
#if defined(VG_BIGENDIAN)
# define CLGEndness Iend_BE
#elif defined(VG_LITTLEENDIAN)
# define CLGEndness Iend_LE
#else
# error "Unknown endianness"
#endif
static
Addr IRConst2Addr(IRConst* con)
{
Addr addr;
if (sizeof(Addr) == 4) {
CLG_ASSERT( con->tag == Ico_U32 );
addr = con->Ico.U32;
}
else if (sizeof(Addr) == 8) {
CLG_ASSERT( con->tag == Ico_U64 );
addr = con->Ico.U64;
}
else
VG_(tool_panic)("Callgrind: invalid Addr type");
return addr;
}
/* First pass over a BB to instrument, counting instructions and jumps
* This is needed for the size of the BB struct to allocate
*
* Called from CLG_(get_bb)
*/
void CLG_(collectBlockInfo)(IRSB* bbIn,
/*INOUT*/ UInt* instrs,
/*INOUT*/ UInt* cjmps,
/*INOUT*/ Bool* cjmp_inverted)
{
Int i;
IRStmt* st;
Addr instrAddr =0, jumpDst;
UInt instrLen = 0;
Bool toNextInstr = False;
// Ist_Exit has to be ignored in preamble code, before first IMark:
// preamble code is added by VEX for self modifying code, and has
// nothing to do with client code
Bool inPreamble = True;
if (!bbIn) return;
for (i = 0; i < bbIn->stmts_used; i++) {
st = bbIn->stmts[i];
if (Ist_IMark == st->tag) {
inPreamble = False;
instrAddr = (Addr)ULong_to_Ptr(st->Ist.IMark.addr);
instrLen = st->Ist.IMark.len;
(*instrs)++;
toNextInstr = False;
}
if (inPreamble) continue;
if (Ist_Exit == st->tag) {
jumpDst = IRConst2Addr(st->Ist.Exit.dst);
toNextInstr = (jumpDst == instrAddr + instrLen);
(*cjmps)++;
}
}
/* if the last instructions of BB conditionally jumps to next instruction
* (= first instruction of next BB in memory), this is a inverted by VEX.
*/
*cjmp_inverted = toNextInstr;
}
static
void collectStatementInfo(IRTypeEnv* tyenv, IRSB* bbOut, IRStmt* st,
Addr* instrAddr, UInt* instrLen,
IRExpr** loadAddrExpr, IRExpr** storeAddrExpr,
UInt* dataSize, IRType hWordTy)
{
CLG_ASSERT(isFlatIRStmt(st));
switch (st->tag) {
case Ist_NoOp:
break;
case Ist_AbiHint:
/* ABI hints aren't interesting. Ignore. */
break;
case Ist_IMark:
/* st->Ist.IMark.addr is a 64-bit int. ULong_to_Ptr casts this
to the host's native pointer type; if that is 32 bits then it
discards the upper 32 bits. If we are cachegrinding on a
32-bit host then we are also ensured that the guest word size
is 32 bits, due to the assertion in cg_instrument that the
host and guest word sizes must be the same. Hence
st->Ist.IMark.addr will have been derived from a 32-bit guest
code address and truncation of it is safe. I believe this
assignment should be correct for both 32- and 64-bit
machines. */
*instrAddr = (Addr)ULong_to_Ptr(st->Ist.IMark.addr);
*instrLen = st->Ist.IMark.len;
break;
case Ist_WrTmp: {
IRExpr* data = st->Ist.WrTmp.data;
if (data->tag == Iex_Load) {
IRExpr* aexpr = data->Iex.Load.addr;
CLG_ASSERT( isIRAtom(aexpr) );
// Note also, endianness info is ignored. I guess that's not
// interesting.
// XXX: repe cmpsb does two loads... the first one is ignored here!
//tl_assert( NULL == *loadAddrExpr ); // XXX: ???
*loadAddrExpr = aexpr;
*dataSize = sizeofIRType(data->Iex.Load.ty);
}
break;
}
case Ist_Store: {
IRExpr* data = st->Ist.Store.data;
IRExpr* aexpr = st->Ist.Store.addr;
CLG_ASSERT( isIRAtom(aexpr) );
if ( NULL == *storeAddrExpr ) {
/* this is a kludge: ignore all except the first store from
an instruction. */
*storeAddrExpr = aexpr;
*dataSize = sizeofIRType(typeOfIRExpr(tyenv, data));
}
break;
}
case Ist_Dirty: {
IRDirty* d = st->Ist.Dirty.details;
if (d->mFx != Ifx_None) {
/* This dirty helper accesses memory. Collect the
details. */
CLG_ASSERT(d->mAddr != NULL);
CLG_ASSERT(d->mSize != 0);
*dataSize = d->mSize;
if (d->mFx == Ifx_Read || d->mFx == Ifx_Modify)
*loadAddrExpr = d->mAddr;
if (d->mFx == Ifx_Write || d->mFx == Ifx_Modify)
*storeAddrExpr = d->mAddr;
} else {
CLG_ASSERT(d->mAddr == NULL);
CLG_ASSERT(d->mSize == 0);
}
break;
}
case Ist_Put:
case Ist_PutI:
case Ist_MBE:
case Ist_Exit:
break;
default:
VG_(printf)("\n");
ppIRStmt(st);
VG_(printf)("\n");
VG_(tool_panic)("Callgrind: unhandled IRStmt");
}
}
static
void addConstMemStoreStmt( IRSB* bbOut, UWord addr, UInt val, IRType hWordTy)
{
addStmtToIRSB( bbOut,
IRStmt_Store(CLGEndness,
IRExpr_Const(hWordTy == Ity_I32 ?
IRConst_U32( addr ) :
IRConst_U64( addr )),
IRExpr_Const(IRConst_U32(val)) ));
}
static
IRSB* CLG_(instrument)( VgCallbackClosure* closure,
IRSB* bbIn,
VexGuestLayout* layout,
VexGuestExtents* vge,
IRType gWordTy, IRType hWordTy )
{
Int i;
IRSB* bbOut;
IRStmt* st, *stnext;
Addr instrAddr, origAddr;
UInt instrLen = 0, dataSize;
UInt instrCount, costOffset;
IRExpr *loadAddrExpr, *storeAddrExpr;
BB* bb;
IRDirty* di;
IRExpr *arg1, **argv;
Bool bb_seen_before = False;
UInt cJumps = 0, cJumpsCorrected;
Bool beforeIBoundary, instrIssued;
if (gWordTy != hWordTy) {
/* We don't currently support this case. */
VG_(tool_panic)("host/guest word size mismatch");
}
// No instrumentation if it is switched off
if (! CLG_(instrument_state)) {
CLG_DEBUG(5, "instrument(BB %p) [Instrumentation OFF]\n",
(Addr)closure->readdr);
return bbIn;
}
CLG_DEBUG(3, "+ instrument(BB %p)\n", (Addr)closure->readdr);
/* Set up SB for instrumented IR */
bbOut = deepCopyIRSBExceptStmts(bbIn);
// Copy verbatim any IR preamble preceding the first IMark
i = 0;
while (i < bbIn->stmts_used && bbIn->stmts[i]->tag != Ist_IMark) {
addStmtToIRSB( bbOut, bbIn->stmts[i] );
i++;
}
// Get the first statement, and origAddr from it
CLG_ASSERT(bbIn->stmts_used > 0);
st = bbIn->stmts[i];
CLG_ASSERT(Ist_IMark == st->tag);
instrAddr = origAddr = (Addr)st->Ist.IMark.addr;
CLG_ASSERT(origAddr == st->Ist.IMark.addr); // XXX: check no overflow
/* Get BB (creating if necessary).
* JS: The hash table is keyed with orig_addr_noredir -- important!
* JW: Why? If it is because of different chasing of the redirection,
* this is not needed, as chasing is switched off in callgrind
*/
bb = CLG_(get_bb)(origAddr, bbIn, &bb_seen_before);
//bb = CLG_(get_bb)(orig_addr_noredir, bbIn, &bb_seen_before);
/*
* Precondition:
* - jmps_passed has number of cond.jumps passed in last executed BB
* - current_bbcc has a pointer to the BBCC of the last executed BB
* Thus, if bbcc_jmpkind is != -1 (JmpNone),
* current_bbcc->bb->jmp_addr
* gives the address of the jump source.
*
* The BBCC setup does 2 things:
* - trace call:
* * Unwind own call stack, i.e sync our ESP with real ESP
* This is for ESP manipulation (longjmps, C++ exec handling) and RET
* * For CALLs or JMPs crossing objects, record call arg +
* push are on own call stack
*
* - prepare for cache log functions:
* Set current_bbcc to BBCC that gets the costs for this BB execution
* attached
*/
// helper call to setup_bbcc, with pointer to basic block info struct as argument
arg1 = mkIRExpr_HWord( (HWord)bb );
argv = mkIRExprVec_1(arg1);
di = unsafeIRDirty_0_N( 1, "setup_bbcc",
VG_(fnptr_to_fnentry)( & CLG_(setup_bbcc) ),
argv);
addStmtToIRSB( bbOut, IRStmt_Dirty(di) );
instrCount = 0;
costOffset = 0;
// loop for each host instruction (starting from 'i')
do {
// We should be at an IMark statement
CLG_ASSERT(Ist_IMark == st->tag);
// Reset stuff for this original instruction
loadAddrExpr = storeAddrExpr = NULL;
instrIssued = False;
dataSize = 0;
// Process all the statements for this original instruction (ie. until
// the next IMark statement, or the end of the block)
do {
i++;
stnext = ( i < bbIn->stmts_used ? bbIn->stmts[i] : NULL );
beforeIBoundary = !stnext || (Ist_IMark == stnext->tag);
collectStatementInfo(bbIn->tyenv, bbOut, st, &instrAddr, &instrLen,
&loadAddrExpr, &storeAddrExpr, &dataSize, hWordTy);
// instrument a simulator call before conditional jumps
if (st->tag == Ist_Exit) {
// Nb: instrLen will be zero if Vex failed to decode it.
// Also Client requests can appear to be very large (eg. 18
// bytes on x86) because they are really multiple instructions.
CLG_ASSERT( 0 == instrLen ||
bbIn->jumpkind == Ijk_ClientReq ||
(instrLen >= VG_MIN_INSTR_SZB &&
instrLen <= VG_MAX_INSTR_SZB) );
// Add instrumentation before this statement
endOfInstr(bbOut, &(bb->instr[instrCount]), bb_seen_before,
instrAddr - origAddr, instrLen, dataSize, &costOffset,
instrIssued, loadAddrExpr, storeAddrExpr);
// prepare for a possible further simcall in same host instr
loadAddrExpr = storeAddrExpr = NULL;
instrIssued = True;
if (!bb_seen_before) {
bb->jmp[cJumps].instr = instrCount;
bb->jmp[cJumps].skip = False;
}
/* Update global variable jmps_passed (this is before the jump!)
* A correction is needed if VEX inverted the last jump condition
*/
cJumpsCorrected = cJumps;
if ((cJumps+1 == bb->cjmp_count) && bb->cjmp_inverted) cJumpsCorrected++;
addConstMemStoreStmt( bbOut, (UWord) &CLG_(current_state).jmps_passed,
cJumpsCorrected, hWordTy);
cJumps++;
}
addStmtToIRSB( bbOut, st );
st = stnext;
}
while (!beforeIBoundary);
// Add instrumentation for this original instruction.
if (!instrIssued || (loadAddrExpr != 0) || (storeAddrExpr !=0))
endOfInstr(bbOut, &(bb->instr[instrCount]), bb_seen_before,
instrAddr - origAddr, instrLen, dataSize, &costOffset,
instrIssued, loadAddrExpr, storeAddrExpr);
instrCount++;
}
while (st);
/* Always update global variable jmps_passed (at end of BB)
* A correction is needed if VEX inverted the last jump condition
*/
cJumpsCorrected = cJumps;
if (bb->cjmp_inverted) cJumpsCorrected--;
addConstMemStoreStmt( bbOut, (UWord) &CLG_(current_state).jmps_passed,
cJumpsCorrected, hWordTy);
/* This stores the instr of the call/ret at BB end */
bb->jmp[cJumps].instr = instrCount-1;
CLG_ASSERT(bb->cjmp_count == cJumps);
CLG_ASSERT(bb->instr_count == instrCount);
instrAddr += instrLen;
if (bb_seen_before) {
CLG_ASSERT(bb->instr_len == instrAddr - origAddr);
CLG_ASSERT(bb->cost_count == costOffset);
CLG_ASSERT(bb->jmpkind == bbIn->jumpkind);
}
else {
bb->instr_len = instrAddr - origAddr;
bb->cost_count = costOffset;
bb->jmpkind = bbIn->jumpkind;
}
CLG_DEBUG(3, "- instrument(BB %p): byteLen %u, CJumps %u, CostLen %u\n",
origAddr, bb->instr_len, bb->cjmp_count, bb->cost_count);
if (cJumps>0) {
CLG_DEBUG(3, " [ ");
for (i=0;i<cJumps;i++)
CLG_DEBUG(3, "%d ", bb->jmp[i].instr);
CLG_DEBUG(3, "], last inverted: %s \n", bb->cjmp_inverted ? "yes":"no");
}
return bbOut;
}
/*--------------------------------------------------------------------*/
/*--- Discarding BB info ---*/
/*--------------------------------------------------------------------*/
// Called when a translation is removed from the translation cache for
// any reason at all: to free up space, because the guest code was
// unmapped or modified, or for any arbitrary reason.
static
void clg_discard_superblock_info ( Addr64 orig_addr64, VexGuestExtents vge )
{
Addr orig_addr = (Addr)orig_addr64;
tl_assert(vge.n_used > 0);
if (0)
VG_(printf)( "discard_superblock_info: %p, %p, %llu\n",
(void*)(Addr)orig_addr,
(void*)(Addr)vge.base[0], (ULong)vge.len[0]);
// Get BB info, remove from table, free BB info. Simple! Note that we
// use orig_addr, not the first instruction address in vge.
CLG_(delete_bb)(orig_addr);
}
/*------------------------------------------------------------*/
/*--- CLG_(fini)() and related function ---*/
/*------------------------------------------------------------*/
static void zero_thread_cost(thread_info* t)
{
Int i;
for(i = 0; i < CLG_(current_call_stack).sp; i++) {
if (!CLG_(current_call_stack).entry[i].jcc) continue;
/* reset call counters to current for active calls */
CLG_(copy_cost)( CLG_(sets).full,
CLG_(current_call_stack).entry[i].enter_cost,
CLG_(current_state).cost );
}
CLG_(forall_bbccs)(CLG_(zero_bbcc));
/* set counter for last dump */
CLG_(copy_cost)( CLG_(sets).full,
t->lastdump_cost, CLG_(current_state).cost );
}
void CLG_(zero_all_cost)(Bool only_current_thread)
{
if (VG_(clo_verbosity) > 1)
VG_(message)(Vg_DebugMsg, " Zeroing costs...");
if (only_current_thread)
zero_thread_cost(CLG_(get_current_thread)());
else
CLG_(forall_threads)(zero_thread_cost);
if (VG_(clo_verbosity) > 1)
VG_(message)(Vg_DebugMsg, " ...done");
}
static
void unwind_thread(thread_info* t)
{
/* unwind signal handlers */
while(CLG_(current_state).sig !=0)
CLG_(post_signal)(CLG_(current_tid),CLG_(current_state).sig);
/* unwind regular call stack */
while(CLG_(current_call_stack).sp>0)
CLG_(pop_call_stack)();
/* reset context and function stack for context generation */
CLG_(init_exec_state)( &CLG_(current_state) );
CLG_(current_fn_stack).top = CLG_(current_fn_stack).bottom;
}
/* Ups, this can go wrong... */
extern void VG_(discard_translations) ( Addr64 start, ULong range );
void CLG_(set_instrument_state)(Char* reason, Bool state)
{
if (CLG_(instrument_state) == state) {
CLG_DEBUG(2, "%s: instrumentation already %s\n",
reason, state ? "ON" : "OFF");
return;
}
CLG_(instrument_state) = state;
CLG_DEBUG(2, "%s: Switching instrumentation %s ...\n",
reason, state ? "ON" : "OFF");
VG_(discard_translations)( (Addr64)0x1000, (ULong) ~0xfffl);
/* reset internal state: call stacks, simulator */
CLG_(forall_threads)(unwind_thread);
(*CLG_(cachesim).clear)();
if (0)
CLG_(forall_threads)(zero_thread_cost);
if (VG_(clo_verbosity) > 1)
VG_(message)(Vg_DebugMsg, "%s: instrumentation switched %s",
reason, state ? "ON" : "OFF");
}
static
Bool CLG_(handle_client_request)(ThreadId tid, UWord *args, UWord *ret)
{
if (!VG_IS_TOOL_USERREQ('C','T',args[0]))
return False;
switch(args[0]) {
case VG_USERREQ__DUMP_STATS:
CLG_(dump_profile)("Client Request", True);
*ret = 0; /* meaningless */
break;
case VG_USERREQ__DUMP_STATS_AT:
{
Char buf[512];
VG_(sprintf)(buf,"Client Request: %s", (Char*)args[1]);
CLG_(dump_profile)(buf, True);
*ret = 0; /* meaningless */
}
break;
case VG_USERREQ__ZERO_STATS:
CLG_(zero_all_cost)(True);
*ret = 0; /* meaningless */
break;
case VG_USERREQ__TOGGLE_COLLECT:
CLG_(current_state).collect = !CLG_(current_state).collect;
CLG_DEBUG(2, "Client Request: toggled collection state to %s\n",
CLG_(current_state).collect ? "ON" : "OFF");
*ret = 0; /* meaningless */
break;
case VG_USERREQ__START_INSTRUMENTATION:
CLG_(set_instrument_state)("Client Request", True);
*ret = 0; /* meaningless */
break;
case VG_USERREQ__STOP_INSTRUMENTATION:
CLG_(set_instrument_state)("Client Request", False);
*ret = 0; /* meaningless */
break;
default:
return False;
}
return True;
}
/* Syscall Timing */
/* struct timeval syscalltime[VG_N_THREADS]; */
#if CLG_MICROSYSTIME
#include <sys/time.h>
#include <sys/syscall.h>
extern Int VG_(do_syscall) ( UInt, ... );
ULong syscalltime[VG_N_THREADS];
#else
UInt syscalltime[VG_N_THREADS];
#endif
static
void CLG_(pre_syscalltime)(ThreadId tid, UInt syscallno)
{
if (CLG_(clo).collect_systime) {
#if CLG_MICROSYSTIME
struct vki_timeval tv_now;
VG_(do_syscall)(__NR_gettimeofday, (UInt)&tv_now, (UInt)NULL);
syscalltime[tid] = tv_now.tv_sec * 1000000ULL + tv_now.tv_usec;
#else
syscalltime[tid] = VG_(read_millisecond_timer)();
#endif
}
}
static
void CLG_(post_syscalltime)(ThreadId tid, UInt syscallno, SysRes res)
{
if (CLG_(clo).collect_systime &&
CLG_(current_state).bbcc) {
Int o = CLG_(sets).off_full_systime;
#if CLG_MICROSYSTIME
struct vki_timeval tv_now;
ULong diff;
VG_(do_syscall)(__NR_gettimeofday, (UInt)&tv_now, (UInt)NULL);
diff = (tv_now.tv_sec * 1000000ULL + tv_now.tv_usec) - syscalltime[tid];
#else
UInt diff = VG_(read_millisecond_timer)() - syscalltime[tid];
#endif
CLG_DEBUG(0," Time (Off %d) for Syscall %d: %ull\n", o, syscallno, diff);
if (o<0) return;
CLG_(current_state).cost[o] ++;
CLG_(current_state).cost[o+1] += diff;
if (!CLG_(current_state).bbcc->skipped)
CLG_(init_cost_lz)(CLG_(sets).full,
&(CLG_(current_state).bbcc->skipped));
CLG_(current_state).bbcc->skipped[o] ++;
CLG_(current_state).bbcc->skipped[o+1] += diff;
}
}
static
void finish(void)
{
char buf[RESULTS_BUF_LEN];
CLG_DEBUG(0, "finish()\n");
(*CLG_(cachesim).finish)();
/* pop all remaining items from CallStack for correct sum
*/
CLG_(forall_threads)(unwind_thread);
CLG_(dump_profile)(0, False);
CLG_(finish_command)();
if (VG_(clo_verbosity) == 0) return;
/* Hash table stats */
if (VG_(clo_verbosity) > 1) {
int BB_lookups =
CLG_(stat).full_debug_BBs +
CLG_(stat).fn_name_debug_BBs +
CLG_(stat).file_line_debug_BBs +
CLG_(stat).no_debug_BBs;
VG_(message)(Vg_DebugMsg, "");
VG_(message)(Vg_DebugMsg, "Distinct objects: %d",
CLG_(stat).distinct_objs);
VG_(message)(Vg_DebugMsg, "Distinct files: %d",
CLG_(stat).distinct_files);
VG_(message)(Vg_DebugMsg, "Distinct fns: %d",
CLG_(stat).distinct_fns);
VG_(message)(Vg_DebugMsg, "Distinct contexts:%d",
CLG_(stat).distinct_contexts);
VG_(message)(Vg_DebugMsg, "Distinct BBs: %d",
CLG_(stat).distinct_bbs);
VG_(message)(Vg_DebugMsg, "Cost entries: %d (Chunks %d)",
CLG_(costarray_entries), CLG_(costarray_chunks));
VG_(message)(Vg_DebugMsg, "Distinct BBCCs: %d",
CLG_(stat).distinct_bbccs);
VG_(message)(Vg_DebugMsg, "Distinct JCCs: %d",
CLG_(stat).distinct_jccs);
VG_(message)(Vg_DebugMsg, "Distinct skips: %d",
CLG_(stat).distinct_skips);
VG_(message)(Vg_DebugMsg, "BB lookups: %d",
BB_lookups);
if (BB_lookups>0) {
VG_(message)(Vg_DebugMsg, "With full debug info:%3d%% (%d)",
CLG_(stat).full_debug_BBs * 100 / BB_lookups,
CLG_(stat).full_debug_BBs);
VG_(message)(Vg_DebugMsg, "With file/line debug info:%3d%% (%d)",
CLG_(stat).file_line_debug_BBs * 100 / BB_lookups,
CLG_(stat).file_line_debug_BBs);
VG_(message)(Vg_DebugMsg, "With fn name debug info:%3d%% (%d)",
CLG_(stat).fn_name_debug_BBs * 100 / BB_lookups,
CLG_(stat).fn_name_debug_BBs);
VG_(message)(Vg_DebugMsg, "With no debug info:%3d%% (%d)",
CLG_(stat).no_debug_BBs * 100 / BB_lookups,
CLG_(stat).no_debug_BBs);
}
VG_(message)(Vg_DebugMsg, "BBCC Clones: %d",
CLG_(stat).bbcc_clones);
VG_(message)(Vg_DebugMsg, "BBs Retranslated: %d",
CLG_(stat).bb_retranslations);
VG_(message)(Vg_DebugMsg, "Distinct instrs: %d",
CLG_(stat).distinct_instrs);
VG_(message)(Vg_DebugMsg, "");
VG_(message)(Vg_DebugMsg, "LRU Contxt Misses: %d",
CLG_(stat).cxt_lru_misses);
VG_(message)(Vg_DebugMsg, "LRU BBCC Misses: %d",
CLG_(stat).bbcc_lru_misses);
VG_(message)(Vg_DebugMsg, "LRU JCC Misses: %d",
CLG_(stat).jcc_lru_misses);
VG_(message)(Vg_DebugMsg, "BBs Executed: %llu",
CLG_(stat).bb_executions);
VG_(message)(Vg_DebugMsg, "Calls: %llu",
CLG_(stat).call_counter);
VG_(message)(Vg_DebugMsg, "CondJMP followed: %llu",
CLG_(stat).jcnd_counter);
VG_(message)(Vg_DebugMsg, "Boring JMPs: %llu",
CLG_(stat).jump_counter);
VG_(message)(Vg_DebugMsg, "Recursive calls: %llu",
CLG_(stat).rec_call_counter);
VG_(message)(Vg_DebugMsg, "Returns: %llu",
CLG_(stat).ret_counter);
VG_(message)(Vg_DebugMsg, "");
}
CLG_(sprint_eventmapping)(buf, CLG_(dumpmap));
VG_(message)(Vg_UserMsg, "Events : %s", buf);
CLG_(sprint_mappingcost)(buf, CLG_(dumpmap), CLG_(total_cost));
VG_(message)(Vg_UserMsg, "Collected : %s", buf);
VG_(message)(Vg_UserMsg, "");
// if (CLG_(clo).simulate_cache)
(*CLG_(cachesim).printstat)();
}
void CLG_(fini)(Int exitcode)
{
finish();
}
/*--------------------------------------------------------------------*/
/*--- Setup ---*/
/*--------------------------------------------------------------------*/
static void clg_start_client_code_callback ( ThreadId tid, ULong blocks_done )
{
static ULong last_blocks_done = 0;
if (0)
VG_(printf)("%d R %llu\n", (Int)tid, blocks_done);
/* throttle calls to CLG_(run_thread) by number of BBs executed */
if (blocks_done - last_blocks_done < 5000) return;
last_blocks_done = blocks_done;
CLG_(run_thread)( tid );
}
static
void CLG_(post_clo_init)(void)
{
VG_(clo_vex_control).iropt_unroll_thresh = 0;
VG_(clo_vex_control).guest_chase_thresh = 0;
CLG_DEBUG(1, " dump threads: %s\n", CLG_(clo).separate_threads ? "Yes":"No");
CLG_DEBUG(1, " call sep. : %d\n", CLG_(clo).separate_callers);
CLG_DEBUG(1, " rec. sep. : %d\n", CLG_(clo).separate_recursions);
if (!CLG_(clo).dump_line && !CLG_(clo).dump_instr && !CLG_(clo).dump_bb) {
VG_(message)(Vg_UserMsg, "Using source line as position.");
CLG_(clo).dump_line = True;
}
CLG_(init_dumps)();
CLG_(init_command)();
(*CLG_(cachesim).post_clo_init)();
CLG_(init_eventsets)(0);
CLG_(init_statistics)(& CLG_(stat));
CLG_(init_cost_lz)( CLG_(sets).full, &CLG_(total_cost) );
/* initialize hash tables */
CLG_(init_obj_table)();
CLG_(init_cxt_table)();
CLG_(init_bb_hash)();
CLG_(init_threads)();
CLG_(run_thread)(1);
CLG_(instrument_state) = CLG_(clo).instrument_atstart;
if (VG_(clo_verbosity > 0)) {
VG_(message)(Vg_UserMsg,
"For interactive control, run 'callgrind_control -h'.");
}
}
static
void CLG_(pre_clo_init)(void)
{
VG_(details_name) ("Callgrind");
VG_(details_version) (NULL);
VG_(details_description) ("a call-graph generating cache profiler");
VG_(details_copyright_author)("Copyright (C) 2002-2008, and GNU GPL'd, "
"by Josef Weidendorfer et al.");
VG_(details_bug_reports_to) (VG_BUGS_TO);
VG_(details_avg_translation_sizeB) ( 500 );
VG_(basic_tool_funcs) (CLG_(post_clo_init),
CLG_(instrument),
CLG_(fini));
VG_(needs_superblock_discards)(clg_discard_superblock_info);
VG_(needs_command_line_options)(CLG_(process_cmd_line_option),
CLG_(print_usage),
CLG_(print_debug_usage));
VG_(needs_client_requests)(CLG_(handle_client_request));
VG_(needs_syscall_wrapper)(CLG_(pre_syscalltime),
CLG_(post_syscalltime));
VG_(track_start_client_code) ( & clg_start_client_code_callback );
VG_(track_pre_deliver_signal) ( & CLG_(pre_signal) );
VG_(track_post_deliver_signal)( & CLG_(post_signal) );
CLG_(set_clo_defaults)();
}
VG_DETERMINE_INTERFACE_VERSION(CLG_(pre_clo_init))
/*--------------------------------------------------------------------*/
/*--- end main.c ---*/
/*--------------------------------------------------------------------*/
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