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gerrit-public.fairphone.software / fp2-dev / platform / external / valgrind / c9a6f4b6c33014aa3259182b1623a7669011f805 / . / cachegrind / cg_main.c
blob: 6d7ce8767d46d62294a9f295bc7a06d8014c18f7 [file] [log] [blame]
/*--------------------------------------------------------------------*/
/*--- Cachegrind: everything but the simulation itself. ---*/
/*--- cg_main.c ---*/
/*--------------------------------------------------------------------*/
/*
This file is part of Cachegrind, a Valgrind tool for cache
profiling programs.
Copyright (C) 2002-2009 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 "pub_tool_basics.h"
#include "pub_tool_vki.h"
#include "pub_tool_debuginfo.h"
#include "pub_tool_libcbase.h"
#include "pub_tool_libcassert.h"
#include "pub_tool_libcfile.h"
#include "pub_tool_libcprint.h"
#include "pub_tool_libcproc.h"
#include "pub_tool_machine.h"
#include "pub_tool_mallocfree.h"
#include "pub_tool_options.h"
#include "pub_tool_oset.h"
#include "pub_tool_tooliface.h"
#include "pub_tool_xarray.h"
#include "pub_tool_clientstate.h"
#include "pub_tool_machine.h" // VG_(fnptr_to_fnentry)
#include "cg_arch.h"
#include "cg_sim.c"
#include "cg_branchpred.c"
/*------------------------------------------------------------*/
/*--- Constants ---*/
/*------------------------------------------------------------*/
/* Set to 1 for very verbose debugging */
#define DEBUG_CG 0
#define MIN_LINE_SIZE 16
#define FILE_LEN VKI_PATH_MAX
#define FN_LEN 256
/*------------------------------------------------------------*/
/*--- Options ---*/
/*------------------------------------------------------------*/
static Bool clo_cache_sim = True; /* do cache simulation? */
static Bool clo_branch_sim = False; /* do branch simulation? */
static Char* clo_cachegrind_out_file = "cachegrind.out.%p";
/*------------------------------------------------------------*/
/*--- Types and Data Structures ---*/
/*------------------------------------------------------------*/
typedef
struct {
ULong a; /* total # memory accesses of this kind */
ULong m1; /* misses in the first level cache */
ULong m2; /* misses in the second level cache */
}
CacheCC;
typedef
struct {
ULong b; /* total # branches of this kind */
ULong mp; /* number of branches mispredicted */
}
BranchCC;
//------------------------------------------------------------
// Primary data structure #1: CC table
// - Holds the per-source-line hit/miss stats, grouped by file/function/line.
// - an ordered set of CCs. CC indexing done by file/function/line (as
// determined from the instrAddr).
// - Traversed for dumping stats at end in file/func/line hierarchy.
typedef struct {
Char* file;
Char* fn;
Int line;
}
CodeLoc;
typedef struct {
CodeLoc loc; /* Source location that these counts pertain to */
CacheCC Ir; /* Insn read counts */
CacheCC Dr; /* Data read counts */
CacheCC Dw; /* Data write/modify counts */
BranchCC Bc; /* Conditional branch counts */
BranchCC Bi; /* Indirect branch counts */
} LineCC;
// First compare file, then fn, then line.
static Word cmp_CodeLoc_LineCC(const void *vloc, const void *vcc)
{
Word res;
CodeLoc* a = (CodeLoc*)vloc;
CodeLoc* b = &(((LineCC*)vcc)->loc);
res = VG_(strcmp)(a->file, b->file);
if (0 != res)
return res;
res = VG_(strcmp)(a->fn, b->fn);
if (0 != res)
return res;
return a->line - b->line;
}
static OSet* CC_table;
//------------------------------------------------------------
// Primary data structure #2: InstrInfo table
// - Holds the cached info about each instr that is used for simulation.
// - table(SB_start_addr, list(InstrInfo))
// - For each SB, each InstrInfo in the list holds info about the
// instruction (instrLen, instrAddr, etc), plus a pointer to its line
// CC. This node is what's passed to the simulation function.
// - When SBs are discarded the relevant list(instr_details) is freed.
typedef struct _InstrInfo InstrInfo;
struct _InstrInfo {
Addr instr_addr;
UChar instr_len;
LineCC* parent; // parent line-CC
};
typedef struct _SB_info SB_info;
struct _SB_info {
Addr SB_addr; // key; MUST BE FIRST
Int n_instrs;
InstrInfo instrs[0];
};
static OSet* instrInfoTable;
//------------------------------------------------------------
// Secondary data structure: string table
// - holds strings, avoiding dups
// - used for filenames and function names, each of which will be
// pointed to by one or more CCs.
// - it also allows equality checks just by pointer comparison, which
// is good when printing the output file at the end.
static OSet* stringTable;
//------------------------------------------------------------
// Stats
static Int distinct_files = 0;
static Int distinct_fns = 0;
static Int distinct_lines = 0;
static Int distinct_instrs = 0;
static Int full_debugs = 0;
static Int file_line_debugs = 0;
static Int fn_debugs = 0;
static Int no_debugs = 0;
/*------------------------------------------------------------*/
/*--- String table operations ---*/
/*------------------------------------------------------------*/
static Word stringCmp( const void* key, const void* elem )
{
return VG_(strcmp)(*(Char**)key, *(Char**)elem);
}
// Get a permanent string; either pull it out of the string table if it's
// been encountered before, or dup it and put it into the string table.
static Char* get_perm_string(Char* s)
{
Char** s_ptr = VG_(OSetGen_Lookup)(stringTable, &s);
if (s_ptr) {
return *s_ptr;
} else {
Char** s_node = VG_(OSetGen_AllocNode)(stringTable, sizeof(Char*));
*s_node = VG_(strdup)("cg.main.gps.1", s);
VG_(OSetGen_Insert)(stringTable, s_node);
return *s_node;
}
}
/*------------------------------------------------------------*/
/*--- CC table operations ---*/
/*------------------------------------------------------------*/
static void get_debug_info(Addr instr_addr, Char file[FILE_LEN],
Char fn[FN_LEN], Int* line)
{
Char dir[FILE_LEN];
Bool found_dirname;
Bool found_file_line = VG_(get_filename_linenum)(
instr_addr,
file, FILE_LEN,
dir, FILE_LEN, &found_dirname,
line
);
Bool found_fn = VG_(get_fnname)(instr_addr, fn, FN_LEN);
if (!found_file_line) {
VG_(strcpy)(file, "???");
*line = 0;
}
if (!found_fn) {
VG_(strcpy)(fn, "???");
}
if (found_dirname) {
// +1 for the '/'.
tl_assert(VG_(strlen)(dir) + VG_(strlen)(file) + 1 < FILE_LEN);
VG_(strcat)(dir, "/"); // Append '/'
VG_(strcat)(dir, file); // Append file to dir
VG_(strcpy)(file, dir); // Move dir+file to file
}
if (found_file_line) {
if (found_fn) full_debugs++;
else file_line_debugs++;
} else {
if (found_fn) fn_debugs++;
else no_debugs++;
}
}
// Do a three step traversal: by file, then fn, then line.
// Returns a pointer to the line CC, creates a new one if necessary.
static LineCC* get_lineCC(Addr origAddr)
{
Char file[FILE_LEN], fn[FN_LEN];
Int line;
CodeLoc loc;
LineCC* lineCC;
get_debug_info(origAddr, file, fn, &line);
loc.file = file;
loc.fn = fn;
loc.line = line;
lineCC = VG_(OSetGen_Lookup)(CC_table, &loc);
if (!lineCC) {
// Allocate and zero a new node.
lineCC = VG_(OSetGen_AllocNode)(CC_table, sizeof(LineCC));
lineCC->loc.file = get_perm_string(loc.file);
lineCC->loc.fn = get_perm_string(loc.fn);
lineCC->loc.line = loc.line;
lineCC->Ir.a = 0;
lineCC->Ir.m1 = 0;
lineCC->Ir.m2 = 0;
lineCC->Dr.a = 0;
lineCC->Dr.m1 = 0;
lineCC->Dr.m2 = 0;
lineCC->Dw.a = 0;
lineCC->Dw.m1 = 0;
lineCC->Dw.m2 = 0;
lineCC->Bc.b = 0;
lineCC->Bc.mp = 0;
lineCC->Bi.b = 0;
lineCC->Bi.mp = 0;
VG_(OSetGen_Insert)(CC_table, lineCC);
}
return lineCC;
}
/*------------------------------------------------------------*/
/*--- Cache simulation functions ---*/
/*------------------------------------------------------------*/
static VG_REGPARM(1)
void log_1I_0D_cache_access(InstrInfo* n)
{
//VG_(printf)("1I_0D : CCaddr=0x%010lx, iaddr=0x%010lx, isize=%lu\n",
// n, n->instr_addr, n->instr_len);
cachesim_I1_doref(n->instr_addr, n->instr_len,
&n->parent->Ir.m1, &n->parent->Ir.m2);
n->parent->Ir.a++;
}
static VG_REGPARM(2)
void log_2I_0D_cache_access(InstrInfo* n, InstrInfo* n2)
{
//VG_(printf)("2I_0D : CC1addr=0x%010lx, i1addr=0x%010lx, i1size=%lu\n"
// " CC2addr=0x%010lx, i2addr=0x%010lx, i2size=%lu\n",
// n, n->instr_addr, n->instr_len,
// n2, n2->instr_addr, n2->instr_len);
cachesim_I1_doref(n->instr_addr, n->instr_len,
&n->parent->Ir.m1, &n->parent->Ir.m2);
n->parent->Ir.a++;
cachesim_I1_doref(n2->instr_addr, n2->instr_len,
&n2->parent->Ir.m1, &n2->parent->Ir.m2);
n2->parent->Ir.a++;
}
static VG_REGPARM(3)
void log_3I_0D_cache_access(InstrInfo* n, InstrInfo* n2, InstrInfo* n3)
{
//VG_(printf)("3I_0D : CC1addr=0x%010lx, i1addr=0x%010lx, i1size=%lu\n"
// " CC2addr=0x%010lx, i2addr=0x%010lx, i2size=%lu\n"
// " CC3addr=0x%010lx, i3addr=0x%010lx, i3size=%lu\n",
// n, n->instr_addr, n->instr_len,
// n2, n2->instr_addr, n2->instr_len,
// n3, n3->instr_addr, n3->instr_len);
cachesim_I1_doref(n->instr_addr, n->instr_len,
&n->parent->Ir.m1, &n->parent->Ir.m2);
n->parent->Ir.a++;
cachesim_I1_doref(n2->instr_addr, n2->instr_len,
&n2->parent->Ir.m1, &n2->parent->Ir.m2);
n2->parent->Ir.a++;
cachesim_I1_doref(n3->instr_addr, n3->instr_len,
&n3->parent->Ir.m1, &n3->parent->Ir.m2);
n3->parent->Ir.a++;
}
static VG_REGPARM(3)
void log_1I_1Dr_cache_access(InstrInfo* n, Addr data_addr, Word data_size)
{
//VG_(printf)("1I_1Dr: CCaddr=0x%010lx, iaddr=0x%010lx, isize=%lu\n"
// " daddr=0x%010lx, dsize=%lu\n",
// n, n->instr_addr, n->instr_len, data_addr, data_size);
cachesim_I1_doref(n->instr_addr, n->instr_len,
&n->parent->Ir.m1, &n->parent->Ir.m2);
n->parent->Ir.a++;
cachesim_D1_doref(data_addr, data_size,
&n->parent->Dr.m1, &n->parent->Dr.m2);
n->parent->Dr.a++;
}
static VG_REGPARM(3)
void log_1I_1Dw_cache_access(InstrInfo* n, Addr data_addr, Word data_size)
{
//VG_(printf)("1I_1Dw: CCaddr=0x%010lx, iaddr=0x%010lx, isize=%lu\n"
// " daddr=0x%010lx, dsize=%lu\n",
// n, n->instr_addr, n->instr_len, data_addr, data_size);
cachesim_I1_doref(n->instr_addr, n->instr_len,
&n->parent->Ir.m1, &n->parent->Ir.m2);
n->parent->Ir.a++;
cachesim_D1_doref(data_addr, data_size,
&n->parent->Dw.m1, &n->parent->Dw.m2);
n->parent->Dw.a++;
}
static VG_REGPARM(3)
void log_0I_1Dr_cache_access(InstrInfo* n, Addr data_addr, Word data_size)
{
//VG_(printf)("0I_1Dr: CCaddr=0x%010lx, daddr=0x%010lx, dsize=%lu\n",
// n, data_addr, data_size);
cachesim_D1_doref(data_addr, data_size,
&n->parent->Dr.m1, &n->parent->Dr.m2);
n->parent->Dr.a++;
}
static VG_REGPARM(3)
void log_0I_1Dw_cache_access(InstrInfo* n, Addr data_addr, Word data_size)
{
//VG_(printf)("0I_1Dw: CCaddr=0x%010lx, daddr=0x%010lx, dsize=%lu\n",
// n, data_addr, data_size);
cachesim_D1_doref(data_addr, data_size,
&n->parent->Dw.m1, &n->parent->Dw.m2);
n->parent->Dw.a++;
}
/* For branches, we consult two different predictors, one which
predicts taken/untaken for conditional branches, and the other
which predicts the branch target address for indirect branches
(jump-to-register style ones). */
static VG_REGPARM(2)
void log_cond_branch(InstrInfo* n, Word taken)
{
//VG_(printf)("cbrnch: CCaddr=0x%010lx, taken=0x%010lx\n",
// n, taken);
n->parent->Bc.b++;
n->parent->Bc.mp
+= (1 & do_cond_branch_predict(n->instr_addr, taken));
}
static VG_REGPARM(2)
void log_ind_branch(InstrInfo* n, UWord actual_dst)
{
//VG_(printf)("ibrnch: CCaddr=0x%010lx, dst=0x%010lx\n",
// n, actual_dst);
n->parent->Bi.b++;
n->parent->Bi.mp
+= (1 & do_ind_branch_predict(n->instr_addr, actual_dst));
}
/*------------------------------------------------------------*/
/*--- Instrumentation types and structures ---*/
/*------------------------------------------------------------*/
/* Maintain an ordered list of memory events which are outstanding, in
the sense that no IR has yet been generated to do the relevant
helper calls. The BB is scanned top to bottom and memory events
are added to the end of the list, merging with the most recent
notified event where possible (Dw immediately following Dr and
having the same size and EA can be merged).
This merging is done so that for architectures which have
load-op-store instructions (x86, amd64), the insn is treated as if
it makes just one memory reference (a modify), rather than two (a
read followed by a write at the same address).
At various points the list will need to be flushed, that is, IR
generated from it. That must happen before any possible exit from
the block (the end, or an IRStmt_Exit). Flushing also takes place
when there is no space to add a new event.
If we require the simulation statistics to be up to date with
respect to possible memory exceptions, then the list would have to
be flushed before each memory reference. That would however lose
performance by inhibiting event-merging during flushing.
Flushing the list consists of walking it start to end and emitting
instrumentation IR for each event, in the order in which they
appear. It may be possible to emit a single call for two adjacent
events in order to reduce the number of helper function calls made.
For example, it could well be profitable to handle two adjacent Ir
events with a single helper call. */
typedef
IRExpr
IRAtom;
typedef
enum {
Ev_Ir, // Instruction read
Ev_Dr, // Data read
Ev_Dw, // Data write
Ev_Dm, // Data modify (read then write)
Ev_Bc, // branch conditional
Ev_Bi // branch indirect (to unknown destination)
}
EventTag;
typedef
struct {
EventTag tag;
InstrInfo* inode;
union {
struct {
} Ir;
struct {
IRAtom* ea;
Int szB;
} Dr;
struct {
IRAtom* ea;
Int szB;
} Dw;
struct {
IRAtom* ea;
Int szB;
} Dm;
struct {
IRAtom* taken; /* :: Ity_I1 */
} Bc;
struct {
IRAtom* dst;
} Bi;
} Ev;
}
Event;
static void init_Event ( Event* ev ) {
VG_(memset)(ev, 0, sizeof(Event));
}
static IRAtom* get_Event_dea ( Event* ev ) {
switch (ev->tag) {
case Ev_Dr: return ev->Ev.Dr.ea;
case Ev_Dw: return ev->Ev.Dw.ea;
case Ev_Dm: return ev->Ev.Dm.ea;
default: tl_assert(0);
}
}
static Int get_Event_dszB ( Event* ev ) {
switch (ev->tag) {
case Ev_Dr: return ev->Ev.Dr.szB;
case Ev_Dw: return ev->Ev.Dw.szB;
case Ev_Dm: return ev->Ev.Dm.szB;
default: tl_assert(0);
}
}
/* Up to this many unnotified events are allowed. Number is
arbitrary. Larger numbers allow more event merging to occur, but
potentially induce more spilling due to extending live ranges of
address temporaries. */
#define N_EVENTS 16
/* A struct which holds all the running state during instrumentation.
Mostly to avoid passing loads of parameters everywhere. */
typedef
struct {
/* The current outstanding-memory-event list. */
Event events[N_EVENTS];
Int events_used;
/* The array of InstrInfo bins for the BB. */
SB_info* sbInfo;
/* Number InstrInfo bins 'used' so far. */
Int sbInfo_i;
/* The output SB being constructed. */
IRSB* sbOut;
}
CgState;
/*------------------------------------------------------------*/
/*--- Instrumentation main ---*/
/*------------------------------------------------------------*/
// Note that origAddr is the real origAddr, not the address of the first
// instruction in the block (they can be different due to redirection).
static
SB_info* get_SB_info(IRSB* sbIn, Addr origAddr)
{
Int i, n_instrs;
IRStmt* st;
SB_info* sbInfo;
// Count number of original instrs in SB
n_instrs = 0;
for (i = 0; i < sbIn->stmts_used; i++) {
st = sbIn->stmts[i];
if (Ist_IMark == st->tag) n_instrs++;
}
// Check that we don't have an entry for this BB in the instr-info table.
// If this assertion fails, there has been some screwup: some
// translations must have been discarded but Cachegrind hasn't discarded
// the corresponding entries in the instr-info table.
sbInfo = VG_(OSetGen_Lookup)(instrInfoTable, &origAddr);
tl_assert(NULL == sbInfo);
// BB never translated before (at this address, at least; could have
// been unloaded and then reloaded elsewhere in memory)
sbInfo = VG_(OSetGen_AllocNode)(instrInfoTable,
sizeof(SB_info) + n_instrs*sizeof(InstrInfo));
sbInfo->SB_addr = origAddr;
sbInfo->n_instrs = n_instrs;
VG_(OSetGen_Insert)( instrInfoTable, sbInfo );
distinct_instrs++;
return sbInfo;
}
static void showEvent ( Event* ev )
{
switch (ev->tag) {
case Ev_Ir:
VG_(printf)("Ir %p\n", ev->inode);
break;
case Ev_Dr:
VG_(printf)("Dr %p %d EA=", ev->inode, ev->Ev.Dr.szB);
ppIRExpr(ev->Ev.Dr.ea);
VG_(printf)("\n");
break;
case Ev_Dw:
VG_(printf)("Dw %p %d EA=", ev->inode, ev->Ev.Dw.szB);
ppIRExpr(ev->Ev.Dw.ea);
VG_(printf)("\n");
break;
case Ev_Dm:
VG_(printf)("Dm %p %d EA=", ev->inode, ev->Ev.Dm.szB);
ppIRExpr(ev->Ev.Dm.ea);
VG_(printf)("\n");
break;
case Ev_Bc:
VG_(printf)("Bc %p GA=", ev->inode);
ppIRExpr(ev->Ev.Bc.taken);
VG_(printf)("\n");
break;
case Ev_Bi:
VG_(printf)("Bi %p DST=", ev->inode);
ppIRExpr(ev->Ev.Bi.dst);
VG_(printf)("\n");
break;
default:
tl_assert(0);
break;
}
}
// Reserve and initialise an InstrInfo for the first mention of a new insn.
static
InstrInfo* setup_InstrInfo ( CgState* cgs, Addr instr_addr, UInt instr_len )
{
InstrInfo* i_node;
tl_assert(cgs->sbInfo_i >= 0);
tl_assert(cgs->sbInfo_i < cgs->sbInfo->n_instrs);
i_node = &cgs->sbInfo->instrs[ cgs->sbInfo_i ];
i_node->instr_addr = instr_addr;
i_node->instr_len = instr_len;
i_node->parent = get_lineCC(instr_addr);
cgs->sbInfo_i++;
return i_node;
}
/* Generate code for all outstanding memory events, and mark the queue
empty. Code is generated into cgs->bbOut, and this activity
'consumes' slots in cgs->sbInfo. */
static void flushEvents ( CgState* cgs )
{
Int i, regparms;
Char* helperName;
void* helperAddr;
IRExpr** argv;
IRExpr* i_node_expr;
IRDirty* di;
Event* ev;
Event* ev2;
Event* ev3;
i = 0;
while (i < cgs->events_used) {
helperName = NULL;
helperAddr = NULL;
argv = NULL;
regparms = 0;
/* generate IR to notify event i and possibly the ones
immediately following it. */
tl_assert(i >= 0 && i < cgs->events_used);
ev = &cgs->events[i];
ev2 = ( i < cgs->events_used-1 ? &cgs->events[i+1] : NULL );
ev3 = ( i < cgs->events_used-2 ? &cgs->events[i+2] : NULL );
if (DEBUG_CG) {
VG_(printf)(" flush ");
showEvent( ev );
}
i_node_expr = mkIRExpr_HWord( (HWord)ev->inode );
/* Decide on helper fn to call and args to pass it, and advance
i appropriately. */
switch (ev->tag) {
case Ev_Ir:
/* Merge an Ir with a following Dr/Dm. */
if (ev2 && (ev2->tag == Ev_Dr || ev2->tag == Ev_Dm)) {
/* Why is this true? It's because we're merging an Ir
with a following Dr or Dm. The Ir derives from the
instruction's IMark and the Dr/Dm from data
references which follow it. In short it holds
because each insn starts with an IMark, hence an
Ev_Ir, and so these Dr/Dm must pertain to the
immediately preceding Ir. Same applies to analogous
assertions in the subsequent cases. */
tl_assert(ev2->inode == ev->inode);
helperName = "log_1I_1Dr_cache_access";
helperAddr = &log_1I_1Dr_cache_access;
argv = mkIRExprVec_3( i_node_expr,
get_Event_dea(ev2),
mkIRExpr_HWord( get_Event_dszB(ev2) ) );
regparms = 3;
i += 2;
}
/* Merge an Ir with a following Dw. */
else
if (ev2 && ev2->tag == Ev_Dw) {
tl_assert(ev2->inode == ev->inode);
helperName = "log_1I_1Dw_cache_access";
helperAddr = &log_1I_1Dw_cache_access;
argv = mkIRExprVec_3( i_node_expr,
get_Event_dea(ev2),
mkIRExpr_HWord( get_Event_dszB(ev2) ) );
regparms = 3;
i += 2;
}
/* Merge an Ir with two following Irs. */
else
if (ev2 && ev3 && ev2->tag == Ev_Ir && ev3->tag == Ev_Ir)
{
helperName = "log_3I_0D_cache_access";
helperAddr = &log_3I_0D_cache_access;
argv = mkIRExprVec_3( i_node_expr,
mkIRExpr_HWord( (HWord)ev2->inode ),
mkIRExpr_HWord( (HWord)ev3->inode ) );
regparms = 3;
i += 3;
}
/* Merge an Ir with one following Ir. */
else
if (ev2 && ev2->tag == Ev_Ir) {
helperName = "log_2I_0D_cache_access";
helperAddr = &log_2I_0D_cache_access;
argv = mkIRExprVec_2( i_node_expr,
mkIRExpr_HWord( (HWord)ev2->inode ) );
regparms = 2;
i += 2;
}
/* No merging possible; emit as-is. */
else {
helperName = "log_1I_0D_cache_access";
helperAddr = &log_1I_0D_cache_access;
argv = mkIRExprVec_1( i_node_expr );
regparms = 1;
i++;
}
break;
case Ev_Dr:
case Ev_Dm:
/* Data read or modify */
helperName = "log_0I_1Dr_cache_access";
helperAddr = &log_0I_1Dr_cache_access;
argv = mkIRExprVec_3( i_node_expr,
get_Event_dea(ev),
mkIRExpr_HWord( get_Event_dszB(ev) ) );
regparms = 3;
i++;
break;
case Ev_Dw:
/* Data write */
helperName = "log_0I_1Dw_cache_access";
helperAddr = &log_0I_1Dw_cache_access;
argv = mkIRExprVec_3( i_node_expr,
get_Event_dea(ev),
mkIRExpr_HWord( get_Event_dszB(ev) ) );
regparms = 3;
i++;
break;
case Ev_Bc:
/* Conditional branch */
helperName = "log_cond_branch";
helperAddr = &log_cond_branch;
argv = mkIRExprVec_2( i_node_expr, ev->Ev.Bc.taken );
regparms = 2;
i++;
break;
case Ev_Bi:
/* Branch to an unknown destination */
helperName = "log_ind_branch";
helperAddr = &log_ind_branch;
argv = mkIRExprVec_2( i_node_expr, ev->Ev.Bi.dst );
regparms = 2;
i++;
break;
default:
tl_assert(0);
}
/* Add the helper. */
tl_assert(helperName);
tl_assert(helperAddr);
tl_assert(argv);
di = unsafeIRDirty_0_N( regparms,
helperName, VG_(fnptr_to_fnentry)( helperAddr ),
argv );
addStmtToIRSB( cgs->sbOut, IRStmt_Dirty(di) );
}
cgs->events_used = 0;
}
static void addEvent_Ir ( CgState* cgs, InstrInfo* inode )
{
Event* evt;
if (cgs->events_used == N_EVENTS)
flushEvents(cgs);
tl_assert(cgs->events_used >= 0 && cgs->events_used < N_EVENTS);
evt = &cgs->events[cgs->events_used];
init_Event(evt);
evt->tag = Ev_Ir;
evt->inode = inode;
cgs->events_used++;
}
static
void addEvent_Dr ( CgState* cgs, InstrInfo* inode, Int datasize, IRAtom* ea )
{
Event* evt;
tl_assert(isIRAtom(ea));
tl_assert(datasize >= 1 && datasize <= MIN_LINE_SIZE);
if (!clo_cache_sim)
return;
if (cgs->events_used == N_EVENTS)
flushEvents(cgs);
tl_assert(cgs->events_used >= 0 && cgs->events_used < N_EVENTS);
evt = &cgs->events[cgs->events_used];
init_Event(evt);
evt->tag = Ev_Dr;
evt->inode = inode;
evt->Ev.Dr.szB = datasize;
evt->Ev.Dr.ea = ea;
cgs->events_used++;
}
static
void addEvent_Dw ( CgState* cgs, InstrInfo* inode, Int datasize, IRAtom* ea )
{
Event* lastEvt;
Event* evt;
tl_assert(isIRAtom(ea));
tl_assert(datasize >= 1 && datasize <= MIN_LINE_SIZE);
if (!clo_cache_sim)
return;
/* Is it possible to merge this write with the preceding read? */
lastEvt = &cgs->events[cgs->events_used-1];
if (cgs->events_used > 0
&& lastEvt->tag == Ev_Dr
&& lastEvt->Ev.Dr.szB == datasize
&& lastEvt->inode == inode
&& eqIRAtom(lastEvt->Ev.Dr.ea, ea))
{
lastEvt->tag = Ev_Dm;
return;
}
/* No. Add as normal. */
if (cgs->events_used == N_EVENTS)
flushEvents(cgs);
tl_assert(cgs->events_used >= 0 && cgs->events_used < N_EVENTS);
evt = &cgs->events[cgs->events_used];
init_Event(evt);
evt->tag = Ev_Dw;
evt->inode = inode;
evt->Ev.Dw.szB = datasize;
evt->Ev.Dw.ea = ea;
cgs->events_used++;
}
static
void addEvent_Bc ( CgState* cgs, InstrInfo* inode, IRAtom* guard )
{
Event* evt;
tl_assert(isIRAtom(guard));
tl_assert(typeOfIRExpr(cgs->sbOut->tyenv, guard)
== (sizeof(HWord)==4 ? Ity_I32 : Ity_I64));
if (!clo_branch_sim)
return;
if (cgs->events_used == N_EVENTS)
flushEvents(cgs);
tl_assert(cgs->events_used >= 0 && cgs->events_used < N_EVENTS);
evt = &cgs->events[cgs->events_used];
init_Event(evt);
evt->tag = Ev_Bc;
evt->inode = inode;
evt->Ev.Bc.taken = guard;
cgs->events_used++;
}
static
void addEvent_Bi ( CgState* cgs, InstrInfo* inode, IRAtom* whereTo )
{
Event* evt;
tl_assert(isIRAtom(whereTo));
tl_assert(typeOfIRExpr(cgs->sbOut->tyenv, whereTo)
== (sizeof(HWord)==4 ? Ity_I32 : Ity_I64));
if (!clo_branch_sim)
return;
if (cgs->events_used == N_EVENTS)
flushEvents(cgs);
tl_assert(cgs->events_used >= 0 && cgs->events_used < N_EVENTS);
evt = &cgs->events[cgs->events_used];
init_Event(evt);
evt->tag = Ev_Bi;
evt->inode = inode;
evt->Ev.Bi.dst = whereTo;
cgs->events_used++;
}
////////////////////////////////////////////////////////////
static
IRSB* cg_instrument ( VgCallbackClosure* closure,
IRSB* sbIn,
VexGuestLayout* layout,
VexGuestExtents* vge,
IRType gWordTy, IRType hWordTy )
{
Int i, isize;
IRStmt* st;
Addr64 cia; /* address of current insn */
CgState cgs;
IRTypeEnv* tyenv = sbIn->tyenv;
InstrInfo* curr_inode = NULL;
if (gWordTy != hWordTy) {
/* We don't currently support this case. */
VG_(tool_panic)("host/guest word size mismatch");
}
// Set up new SB
cgs.sbOut = deepCopyIRSBExceptStmts(sbIn);
// Copy verbatim any IR preamble preceding the first IMark
i = 0;
while (i < sbIn->stmts_used && sbIn->stmts[i]->tag != Ist_IMark) {
addStmtToIRSB( cgs.sbOut, sbIn->stmts[i] );
i++;
}
// Get the first statement, and initial cia from it
tl_assert(sbIn->stmts_used > 0);
tl_assert(i < sbIn->stmts_used);
st = sbIn->stmts[i];
tl_assert(Ist_IMark == st->tag);
cia = st->Ist.IMark.addr;
isize = st->Ist.IMark.len;
// If Vex fails to decode an instruction, the size will be zero.
// Pretend otherwise.
if (isize == 0) isize = VG_MIN_INSTR_SZB;
// Set up running state and get block info
tl_assert(closure->readdr == vge->base[0]);
cgs.events_used = 0;
cgs.sbInfo = get_SB_info(sbIn, (Addr)closure->readdr);
cgs.sbInfo_i = 0;
if (DEBUG_CG)
VG_(printf)("\n\n---------- cg_instrument ----------\n");
// Traverse the block, initialising inodes, adding events and flushing as
// necessary.
for (/*use current i*/; i < sbIn->stmts_used; i++) {
st = sbIn->stmts[i];
tl_assert(isFlatIRStmt(st));
switch (st->tag) {
case Ist_NoOp:
case Ist_AbiHint:
case Ist_Put:
case Ist_PutI:
case Ist_MBE:
break;
case Ist_IMark:
cia = st->Ist.IMark.addr;
isize = st->Ist.IMark.len;
// If Vex fails to decode an instruction, the size will be zero.
// Pretend otherwise.
if (isize == 0) isize = VG_MIN_INSTR_SZB;
// Sanity-check size.
tl_assert( (VG_MIN_INSTR_SZB <= isize && isize <= VG_MAX_INSTR_SZB)
|| VG_CLREQ_SZB == isize );
// Get space for and init the inode, record it as the current one.
// Subsequent Dr/Dw/Dm events from the same instruction will
// also use it.
curr_inode = setup_InstrInfo(&cgs, cia, isize);
addEvent_Ir( &cgs, curr_inode );
break;
case Ist_WrTmp: {
IRExpr* data = st->Ist.WrTmp.data;
if (data->tag == Iex_Load) {
IRExpr* aexpr = data->Iex.Load.addr;
// Note also, endianness info is ignored. I guess
// that's not interesting.
addEvent_Dr( &cgs, curr_inode, sizeofIRType(data->Iex.Load.ty),
aexpr );
}
break;
}
case Ist_Store: {
IRExpr* data = st->Ist.Store.data;
IRExpr* aexpr = st->Ist.Store.addr;
addEvent_Dw( &cgs, curr_inode,
sizeofIRType(typeOfIRExpr(tyenv, data)), aexpr );
break;
}
case Ist_Dirty: {
Int dataSize;
IRDirty* d = st->Ist.Dirty.details;
if (d->mFx != Ifx_None) {
/* This dirty helper accesses memory. Collect the details. */
tl_assert(d->mAddr != NULL);
tl_assert(d->mSize != 0);
dataSize = d->mSize;
// 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;
if (d->mFx == Ifx_Read || d->mFx == Ifx_Modify)
addEvent_Dr( &cgs, curr_inode, dataSize, d->mAddr );
if (d->mFx == Ifx_Write || d->mFx == Ifx_Modify)
addEvent_Dw( &cgs, curr_inode, dataSize, d->mAddr );
} else {
tl_assert(d->mAddr == NULL);
tl_assert(d->mSize == 0);
}
break;
}
case Ist_Exit: {
/* Stuff to widen the guard expression to a host word, so
we can pass it to the branch predictor simulation
functions easily. */
Bool inverted;
Addr64 nia, sea;
IRConst* dst;
IROp tyW = hWordTy;
IROp widen = tyW==Ity_I32 ? Iop_1Uto32 : Iop_1Uto64;
IROp opXOR = tyW==Ity_I32 ? Iop_Xor32 : Iop_Xor64;
IRTemp guard1 = newIRTemp(cgs.sbOut->tyenv, Ity_I1);
IRTemp guardW = newIRTemp(cgs.sbOut->tyenv, tyW);
IRTemp guard = newIRTemp(cgs.sbOut->tyenv, tyW);
IRExpr* one = tyW==Ity_I32 ? IRExpr_Const(IRConst_U32(1))
: IRExpr_Const(IRConst_U64(1));
/* First we need to figure out whether the side exit got
inverted by the ir optimiser. To do that, figure out
the next (fallthrough) instruction's address and the
side exit address and see if they are the same. */
nia = cia + (Addr64)isize;
if (tyW == Ity_I32)
nia &= 0xFFFFFFFFULL;
/* Side exit address */
dst = st->Ist.Exit.dst;
if (tyW == Ity_I32) {
tl_assert(dst->tag == Ico_U32);
sea = (Addr64)(UInt)dst->Ico.U32;
} else {
tl_assert(tyW == Ity_I64);
tl_assert(dst->tag == Ico_U64);
sea = dst->Ico.U64;
}
inverted = nia == sea;
/* Widen the guard expression. */
addStmtToIRSB( cgs.sbOut,
IRStmt_WrTmp( guard1, st->Ist.Exit.guard ));
addStmtToIRSB( cgs.sbOut,
IRStmt_WrTmp( guardW,
IRExpr_Unop(widen,
IRExpr_RdTmp(guard1))) );
/* If the exit is inverted, invert the sense of the guard. */
addStmtToIRSB(
cgs.sbOut,
IRStmt_WrTmp(
guard,
inverted ? IRExpr_Binop(opXOR, IRExpr_RdTmp(guardW), one)
: IRExpr_RdTmp(guardW)
));
/* And post the event. */
addEvent_Bc( &cgs, curr_inode, IRExpr_RdTmp(guard) );
/* We may never reach the next statement, so need to flush
all outstanding transactions now. */
flushEvents( &cgs );
break;
}
default:
tl_assert(0);
break;
}
/* Copy the original statement */
addStmtToIRSB( cgs.sbOut, st );
if (DEBUG_CG) {
ppIRStmt(st);
VG_(printf)("\n");
}
}
/* Deal with branches to unknown destinations. Except ignore ones
which are function returns as we assume the return stack
predictor never mispredicts. */
if (sbIn->jumpkind == Ijk_Boring) {
if (0) { ppIRExpr( sbIn->next ); VG_(printf)("\n"); }
switch (sbIn->next->tag) {
case Iex_Const:
break; /* boring - branch to known address */
case Iex_RdTmp:
/* looks like an indirect branch (branch to unknown) */
addEvent_Bi( &cgs, curr_inode, sbIn->next );
break;
default:
/* shouldn't happen - if the incoming IR is properly
flattened, should only have tmp and const cases to
consider. */
tl_assert(0);
}
}
/* At the end of the bb. Flush outstandings. */
flushEvents( &cgs );
/* done. stay sane ... */
tl_assert(cgs.sbInfo_i == cgs.sbInfo->n_instrs);
if (DEBUG_CG) {
VG_(printf)( "goto {");
ppIRJumpKind(sbIn->jumpkind);
VG_(printf)( "} ");
ppIRExpr( sbIn->next );
VG_(printf)( "}\n");
}
return cgs.sbOut;
}
/*------------------------------------------------------------*/
/*--- Cache configuration ---*/
/*------------------------------------------------------------*/
#define UNDEFINED_CACHE { -1, -1, -1 }
static cache_t clo_I1_cache = UNDEFINED_CACHE;
static cache_t clo_D1_cache = UNDEFINED_CACHE;
static cache_t clo_L2_cache = UNDEFINED_CACHE;
/* Checks cache config is ok; makes it so if not. */
static
void check_cache(cache_t* cache, Char *name)
{
/* Simulator requires line size and set count to be powers of two */
if (( cache->size % (cache->line_size * cache->assoc) != 0) ||
(-1 == VG_(log2)(cache->size/cache->line_size/cache->assoc))) {
VG_UMSG("error: %s set count not a power of two; aborting.", name);
VG_(exit)(1);
}
if (-1 == VG_(log2)(cache->line_size)) {
VG_UMSG("error: %s line size of %dB not a power of two; aborting.",
name, cache->line_size);
VG_(exit)(1);
}
// Then check line size >= 16 -- any smaller and a single instruction could
// straddle three cache lines, which breaks a simulation assertion and is
// stupid anyway.
if (cache->line_size < MIN_LINE_SIZE) {
VG_UMSG("error: %s line size of %dB too small; aborting.",
name, cache->line_size);
VG_(exit)(1);
}
/* Then check cache size > line size (causes seg faults if not). */
if (cache->size <= cache->line_size) {
VG_UMSG("error: %s cache size of %dB <= line size of %dB; aborting.",
name, cache->size, cache->line_size);
VG_(exit)(1);
}
/* Then check assoc <= (size / line size) (seg faults otherwise). */
if (cache->assoc > (cache->size / cache->line_size)) {
VG_UMSG("warning: %s associativity > (size / line size); aborting.",
name);
VG_(exit)(1);
}
}
static
void configure_caches(cache_t* I1c, cache_t* D1c, cache_t* L2c)
{
#define DEFINED(L) (-1 != L.size || -1 != L.assoc || -1 != L.line_size)
Int n_clos = 0;
// Count how many were defined on the command line.
if (DEFINED(clo_I1_cache)) { n_clos++; }
if (DEFINED(clo_D1_cache)) { n_clos++; }
if (DEFINED(clo_L2_cache)) { n_clos++; }
// Set the cache config (using auto-detection, if supported by the
// architecture)
VG_(configure_caches)( I1c, D1c, L2c, (3 == n_clos) );
// Then replace with any defined on the command line.
if (DEFINED(clo_I1_cache)) { *I1c = clo_I1_cache; }
if (DEFINED(clo_D1_cache)) { *D1c = clo_D1_cache; }
if (DEFINED(clo_L2_cache)) { *L2c = clo_L2_cache; }
// Then check values and fix if not acceptable.
check_cache(I1c, "I1");
check_cache(D1c, "D1");
check_cache(L2c, "L2");
if (VG_(clo_verbosity) >= 2) {
VG_UMSG("Cache configuration used:");
VG_UMSG(" I1: %dB, %d-way, %dB lines",
I1c->size, I1c->assoc, I1c->line_size);
VG_UMSG(" D1: %dB, %d-way, %dB lines",
D1c->size, D1c->assoc, D1c->line_size);
VG_UMSG(" L2: %dB, %d-way, %dB lines",
L2c->size, L2c->assoc, L2c->line_size);
}
#undef CMD_LINE_DEFINED
}
/*------------------------------------------------------------*/
/*--- cg_fini() and related function ---*/
/*------------------------------------------------------------*/
// Total reads/writes/misses. Calculated during CC traversal at the end.
// All auto-zeroed.
static CacheCC Ir_total;
static CacheCC Dr_total;
static CacheCC Dw_total;
static BranchCC Bc_total;
static BranchCC Bi_total;
static void fprint_CC_table_and_calc_totals(void)
{
Int i, fd;
SysRes sres;
Char buf[512], *currFile = NULL, *currFn = NULL;
LineCC* lineCC;
// Setup output filename. Nb: it's important to do this now, ie. as late
// as possible. If we do it at start-up and the program forks and the
// output file format string contains a %p (pid) specifier, both the
// parent and child will incorrectly write to the same file; this
// happened in 3.3.0.
Char* cachegrind_out_file =
VG_(expand_file_name)("--cachegrind-out-file", clo_cachegrind_out_file);
sres = VG_(open)(cachegrind_out_file, VKI_O_CREAT|VKI_O_TRUNC|VKI_O_WRONLY,
VKI_S_IRUSR|VKI_S_IWUSR);
if (sres.isError) {
// If the file can't be opened for whatever reason (conflict
// between multiple cachegrinded processes?), give up now.
VG_UMSG("error: can't open cache simulation output file '%s'",
cachegrind_out_file );
VG_UMSG(" ... so simulation results will be missing.");
VG_(free)(cachegrind_out_file);
return;
} else {
fd = sres.res;
VG_(free)(cachegrind_out_file);
}
// "desc:" lines (giving I1/D1/L2 cache configuration). The spaces after
// the 2nd colon makes cg_annotate's output look nicer.
VG_(sprintf)(buf, "desc: I1 cache: %s\n"
"desc: D1 cache: %s\n"
"desc: L2 cache: %s\n",
I1.desc_line, D1.desc_line, L2.desc_line);
VG_(write)(fd, (void*)buf, VG_(strlen)(buf));
// "cmd:" line
VG_(strcpy)(buf, "cmd:");
VG_(write)(fd, (void*)buf, VG_(strlen)(buf));
if (VG_(args_the_exename)) {
VG_(write)(fd, " ", 1);
VG_(write)(fd, VG_(args_the_exename),
VG_(strlen)( VG_(args_the_exename) ));
}
for (i = 0; i < VG_(sizeXA)( VG_(args_for_client) ); i++) {
HChar* arg = * (HChar**) VG_(indexXA)( VG_(args_for_client), i );
if (arg) {
VG_(write)(fd, " ", 1);
VG_(write)(fd, arg, VG_(strlen)( arg ));
}
}
// "events:" line
if (clo_cache_sim && clo_branch_sim) {
VG_(sprintf)(buf, "\nevents: Ir I1mr I2mr Dr D1mr D2mr Dw D1mw D2mw "
"Bc Bcm Bi Bim\n");
}
else if (clo_cache_sim && !clo_branch_sim) {
VG_(sprintf)(buf, "\nevents: Ir I1mr I2mr Dr D1mr D2mr Dw D1mw D2mw "
"\n");
}
else if (!clo_cache_sim && clo_branch_sim) {
VG_(sprintf)(buf, "\nevents: Ir "
"Bc Bcm Bi Bim\n");
}
else
tl_assert(0); /* can't happen */
VG_(write)(fd, (void*)buf, VG_(strlen)(buf));
// Traverse every lineCC
VG_(OSetGen_ResetIter)(CC_table);
while ( (lineCC = VG_(OSetGen_Next)(CC_table)) ) {
Bool just_hit_a_new_file = False;
// If we've hit a new file, print a "fl=" line. Note that because
// each string is stored exactly once in the string table, we can use
// pointer comparison rather than strcmp() to test for equality, which
// is good because most of the time the comparisons are equal and so
// the whole strings would have to be checked.
if ( lineCC->loc.file != currFile ) {
currFile = lineCC->loc.file;
VG_(sprintf)(buf, "fl=%s\n", currFile);
VG_(write)(fd, (void*)buf, VG_(strlen)(buf));
distinct_files++;
just_hit_a_new_file = True;
}
// If we've hit a new function, print a "fn=" line. We know to do
// this when the function name changes, and also every time we hit a
// new file (in which case the new function name might be the same as
// in the old file, hence the just_hit_a_new_file test).
if ( just_hit_a_new_file || lineCC->loc.fn != currFn ) {
currFn = lineCC->loc.fn;
VG_(sprintf)(buf, "fn=%s\n", currFn);
VG_(write)(fd, (void*)buf, VG_(strlen)(buf));
distinct_fns++;
}
// Print the LineCC
if (clo_cache_sim && clo_branch_sim) {
VG_(sprintf)(buf, "%u %llu %llu %llu"
" %llu %llu %llu"
" %llu %llu %llu"
" %llu %llu %llu %llu\n",
lineCC->loc.line,
lineCC->Ir.a, lineCC->Ir.m1, lineCC->Ir.m2,
lineCC->Dr.a, lineCC->Dr.m1, lineCC->Dr.m2,
lineCC->Dw.a, lineCC->Dw.m1, lineCC->Dw.m2,
lineCC->Bc.b, lineCC->Bc.mp,
lineCC->Bi.b, lineCC->Bi.mp);
}
else if (clo_cache_sim && !clo_branch_sim) {
VG_(sprintf)(buf, "%u %llu %llu %llu"
" %llu %llu %llu"
" %llu %llu %llu\n",
lineCC->loc.line,
lineCC->Ir.a, lineCC->Ir.m1, lineCC->Ir.m2,
lineCC->Dr.a, lineCC->Dr.m1, lineCC->Dr.m2,
lineCC->Dw.a, lineCC->Dw.m1, lineCC->Dw.m2);
}
else if (!clo_cache_sim && clo_branch_sim) {
VG_(sprintf)(buf, "%u %llu"
" %llu %llu %llu %llu\n",
lineCC->loc.line,
lineCC->Ir.a,
lineCC->Bc.b, lineCC->Bc.mp,
lineCC->Bi.b, lineCC->Bi.mp);
}
else
tl_assert(0);
VG_(write)(fd, (void*)buf, VG_(strlen)(buf));
// Update summary stats
Ir_total.a += lineCC->Ir.a;
Ir_total.m1 += lineCC->Ir.m1;
Ir_total.m2 += lineCC->Ir.m2;
Dr_total.a += lineCC->Dr.a;
Dr_total.m1 += lineCC->Dr.m1;
Dr_total.m2 += lineCC->Dr.m2;
Dw_total.a += lineCC->Dw.a;
Dw_total.m1 += lineCC->Dw.m1;
Dw_total.m2 += lineCC->Dw.m2;
Bc_total.b += lineCC->Bc.b;
Bc_total.mp += lineCC->Bc.mp;
Bi_total.b += lineCC->Bi.b;
Bi_total.mp += lineCC->Bi.mp;
distinct_lines++;
}
// Summary stats must come after rest of table, since we calculate them
// during traversal. */
if (clo_cache_sim && clo_branch_sim) {
VG_(sprintf)(buf, "summary:"
" %llu %llu %llu"
" %llu %llu %llu"
" %llu %llu %llu"
" %llu %llu %llu %llu\n",
Ir_total.a, Ir_total.m1, Ir_total.m2,
Dr_total.a, Dr_total.m1, Dr_total.m2,
Dw_total.a, Dw_total.m1, Dw_total.m2,
Bc_total.b, Bc_total.mp,
Bi_total.b, Bi_total.mp);
}
else if (clo_cache_sim && !clo_branch_sim) {
VG_(sprintf)(buf, "summary:"
" %llu %llu %llu"
" %llu %llu %llu"
" %llu %llu %llu\n",
Ir_total.a, Ir_total.m1, Ir_total.m2,
Dr_total.a, Dr_total.m1, Dr_total.m2,
Dw_total.a, Dw_total.m1, Dw_total.m2);
}
else if (!clo_cache_sim && clo_branch_sim) {
VG_(sprintf)(buf, "summary:"
" %llu"
" %llu %llu %llu %llu\n",
Ir_total.a,
Bc_total.b, Bc_total.mp,
Bi_total.b, Bi_total.mp);
}
else
tl_assert(0);
VG_(write)(fd, (void*)buf, VG_(strlen)(buf));
VG_(close)(fd);
}
static UInt ULong_width(ULong n)
{
UInt w = 0;
while (n > 0) {
n = n / 10;
w++;
}
if (w == 0) w = 1;
return w + (w-1)/3; // add space for commas
}
static void cg_fini(Int exitcode)
{
static Char buf1[128], buf2[128], buf3[128], buf4[123], fmt[128];
CacheCC D_total;
BranchCC B_total;
ULong L2_total_m, L2_total_mr, L2_total_mw,
L2_total, L2_total_r, L2_total_w;
Int l1, l2, l3;
/* Running with both cache and branch simulation disabled is not
allowed (checked during command line option processing). */
tl_assert(clo_cache_sim || clo_branch_sim);
fprint_CC_table_and_calc_totals();
if (VG_(clo_verbosity) == 0)
return;
#define MAX(a, b) ((a) >= (b) ? (a) : (b))
/* I cache results. Use the I_refs value to determine the first column
* width. */
l1 = ULong_width(Ir_total.a);
l2 = ULong_width(MAX(Dr_total.a, Bc_total.b));
l3 = ULong_width(MAX(Dw_total.a, Bi_total.b));
/* Make format string, getting width right for numbers */
VG_(sprintf)(fmt, "%%s %%,%dllu", l1);
/* Always print this */
VG_UMSG(fmt, "I refs: ", Ir_total.a);
/* If cache profiling is enabled, show D access numbers and all
miss numbers */
if (clo_cache_sim) {
VG_UMSG(fmt, "I1 misses: ", Ir_total.m1);
VG_UMSG(fmt, "L2i misses: ", Ir_total.m2);
if (0 == Ir_total.a) Ir_total.a = 1;
VG_(percentify)(Ir_total.m1, Ir_total.a, 2, l1+1, buf1);
VG_UMSG("I1 miss rate: %s", buf1);
VG_(percentify)(Ir_total.m2, Ir_total.a, 2, l1+1, buf1);
VG_UMSG("L2i miss rate: %s", buf1);
VG_UMSG("");
/* D cache results. Use the D_refs.rd and D_refs.wr values to
* determine the width of columns 2 & 3. */
D_total.a = Dr_total.a + Dw_total.a;
D_total.m1 = Dr_total.m1 + Dw_total.m1;
D_total.m2 = Dr_total.m2 + Dw_total.m2;
/* Make format string, getting width right for numbers */
VG_(sprintf)(fmt, "%%s %%,%dllu (%%,%dllu rd + %%,%dllu wr)", l1, l2, l3);
VG_UMSG(fmt, "D refs: ",
D_total.a, Dr_total.a, Dw_total.a);
VG_UMSG(fmt, "D1 misses: ",
D_total.m1, Dr_total.m1, Dw_total.m1);
VG_UMSG(fmt, "L2d misses: ",
D_total.m2, Dr_total.m2, Dw_total.m2);
if (0 == D_total.a) D_total.a = 1;
if (0 == Dr_total.a) Dr_total.a = 1;
if (0 == Dw_total.a) Dw_total.a = 1;
VG_(percentify)( D_total.m1, D_total.a, 1, l1+1, buf1);
VG_(percentify)(Dr_total.m1, Dr_total.a, 1, l2+1, buf2);
VG_(percentify)(Dw_total.m1, Dw_total.a, 1, l3+1, buf3);
VG_UMSG("D1 miss rate: %s (%s + %s )", buf1, buf2,buf3);
VG_(percentify)( D_total.m2, D_total.a, 1, l1+1, buf1);
VG_(percentify)(Dr_total.m2, Dr_total.a, 1, l2+1, buf2);
VG_(percentify)(Dw_total.m2, Dw_total.a, 1, l3+1, buf3);
VG_UMSG("L2d miss rate: %s (%s + %s )", buf1, buf2,buf3);
VG_UMSG("");
/* L2 overall results */
L2_total = Dr_total.m1 + Dw_total.m1 + Ir_total.m1;
L2_total_r = Dr_total.m1 + Ir_total.m1;
L2_total_w = Dw_total.m1;
VG_UMSG(fmt, "L2 refs: ",
L2_total, L2_total_r, L2_total_w);
L2_total_m = Dr_total.m2 + Dw_total.m2 + Ir_total.m2;
L2_total_mr = Dr_total.m2 + Ir_total.m2;
L2_total_mw = Dw_total.m2;
VG_UMSG(fmt, "L2 misses: ",
L2_total_m, L2_total_mr, L2_total_mw);
VG_(percentify)(L2_total_m, (Ir_total.a + D_total.a), 1, l1+1, buf1);
VG_(percentify)(L2_total_mr, (Ir_total.a + Dr_total.a), 1, l2+1, buf2);
VG_(percentify)(L2_total_mw, Dw_total.a, 1, l3+1, buf3);
VG_UMSG("L2 miss rate: %s (%s + %s )", buf1, buf2,buf3);
}
/* If branch profiling is enabled, show branch overall results. */
if (clo_branch_sim) {
/* Make format string, getting width right for numbers */
VG_(sprintf)(fmt, "%%s %%,%dllu (%%,%dllu cond + %%,%dllu ind)", l1, l2, l3);
if (0 == Bc_total.b) Bc_total.b = 1;
if (0 == Bi_total.b) Bi_total.b = 1;
B_total.b = Bc_total.b + Bi_total.b;
B_total.mp = Bc_total.mp + Bi_total.mp;
VG_UMSG("");
VG_UMSG(fmt, "Branches: ",
B_total.b, Bc_total.b, Bi_total.b);
VG_UMSG(fmt, "Mispredicts: ",
B_total.mp, Bc_total.mp, Bi_total.mp);
VG_(percentify)(B_total.mp, B_total.b, 1, l1+1, buf1);
VG_(percentify)(Bc_total.mp, Bc_total.b, 1, l2+1, buf2);
VG_(percentify)(Bi_total.mp, Bi_total.b, 1, l3+1, buf3);
VG_UMSG("Mispred rate: %s (%s + %s )", buf1, buf2,buf3);
}
// Various stats
if (VG_(clo_verbosity) > 1) {
Int debug_lookups = full_debugs + fn_debugs +
file_line_debugs + no_debugs;
VG_DMSG("");
VG_DMSG("cachegrind: distinct files: %d", distinct_files);
VG_DMSG("cachegrind: distinct fns: %d", distinct_fns);
VG_DMSG("cachegrind: distinct lines: %d", distinct_lines);
VG_DMSG("cachegrind: distinct instrs:%d", distinct_instrs);
VG_DMSG("cachegrind: debug lookups : %d", debug_lookups);
VG_(percentify)(full_debugs, debug_lookups, 1, 6, buf1);
VG_(percentify)(file_line_debugs, debug_lookups, 1, 6, buf2);
VG_(percentify)(fn_debugs, debug_lookups, 1, 6, buf3);
VG_(percentify)(no_debugs, debug_lookups, 1, 6, buf4);
VG_DMSG("cachegrind: with full info:%s (%d)",
buf1, full_debugs);
VG_DMSG("cachegrind: with file/line info:%s (%d)",
buf2, file_line_debugs);
VG_DMSG("cachegrind: with fn name info:%s (%d)",
buf3, fn_debugs);
VG_DMSG("cachegrind: with zero info:%s (%d)",
buf4, no_debugs);
VG_DMSG("cachegrind: string table size: %lu",
VG_(OSetGen_Size)(stringTable));
VG_DMSG("cachegrind: CC table size: %lu",
VG_(OSetGen_Size)(CC_table));
VG_DMSG("cachegrind: InstrInfo table size: %lu",
VG_(OSetGen_Size)(instrInfoTable));
}
}
/*--------------------------------------------------------------------*/
/*--- 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 cg_discard_superblock_info ( Addr64 orig_addr64, VexGuestExtents vge )
{
SB_info* sbInfo;
Addr orig_addr = (Addr)vge.base[0];
tl_assert(vge.n_used > 0);
if (DEBUG_CG)
VG_(printf)( "discard_basic_block_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.
sbInfo = VG_(OSetGen_Remove)(instrInfoTable, &orig_addr);
tl_assert(NULL != sbInfo);
VG_(OSetGen_FreeNode)(instrInfoTable, sbInfo);
}
/*--------------------------------------------------------------------*/
/*--- Command line processing ---*/
/*--------------------------------------------------------------------*/
static void parse_cache_opt ( cache_t* cache, Char* opt )
{
Long i1, i2, i3;
Char* endptr;
// Option argument looks like "65536,2,64". Extract them.
i1 = VG_(strtoll10)(opt, &endptr); if (*endptr != ',') goto bad;
i2 = VG_(strtoll10)(endptr+1, &endptr); if (*endptr != ',') goto bad;
i3 = VG_(strtoll10)(endptr+1, &endptr); if (*endptr != '\0') goto bad;
// Check for overflow.
cache->size = (Int)i1;
cache->assoc = (Int)i2;
cache->line_size = (Int)i3;
if (cache->size != i1) goto overflow;
if (cache->assoc != i2) goto overflow;
if (cache->line_size != i3) goto overflow;
return;
overflow:
VG_UMSG("one of the cache parameters was too large and overflowed\n");
bad:
// XXX: this omits the "--I1/D1/L2=" part from the message, but that's
// not a big deal.
VG_(err_bad_option)(opt);
}
static Bool cg_process_cmd_line_option(Char* arg)
{
Char* tmp_str;
// 5 is length of "--I1="
if VG_STR_CLO(arg, "--I1", tmp_str)
parse_cache_opt(&clo_I1_cache, tmp_str);
else if VG_STR_CLO(arg, "--D1", tmp_str)
parse_cache_opt(&clo_D1_cache, tmp_str);
else if VG_STR_CLO(arg, "--L2", tmp_str)
parse_cache_opt(&clo_L2_cache, tmp_str);
else if VG_STR_CLO( arg, "--cachegrind-out-file", clo_cachegrind_out_file) {}
else if VG_BOOL_CLO(arg, "--cache-sim", clo_cache_sim) {}
else if VG_BOOL_CLO(arg, "--branch-sim", clo_branch_sim) {}
else
return False;
return True;
}
static void cg_print_usage(void)
{
VG_(printf)(
" --I1=<size>,<assoc>,<line_size> set I1 cache manually\n"
" --D1=<size>,<assoc>,<line_size> set D1 cache manually\n"
" --L2=<size>,<assoc>,<line_size> set L2 cache manually\n"
" --cache-sim=yes|no [yes] collect cache stats?\n"
" --branch-sim=yes|no [no] collect branch prediction stats?\n"
" --cachegrind-out-file=<file> output file name [cachegrind.out.%%p]\n"
);
}
static void cg_print_debug_usage(void)
{
VG_(printf)(
" (none)\n"
);
}
/*--------------------------------------------------------------------*/
/*--- Setup ---*/
/*--------------------------------------------------------------------*/
static void cg_post_clo_init(void); /* just below */
static void cg_pre_clo_init(void)
{
VG_(details_name) ("Cachegrind");
VG_(details_version) (NULL);
VG_(details_description) ("a cache and branch-prediction profiler");
VG_(details_copyright_author)(
"Copyright (C) 2002-2009, and GNU GPL'd, by Nicholas Nethercote et al.");
VG_(details_bug_reports_to) (VG_BUGS_TO);
VG_(details_avg_translation_sizeB) ( 500 );
VG_(basic_tool_funcs) (cg_post_clo_init,
cg_instrument,
cg_fini);
VG_(needs_superblock_discards)(cg_discard_superblock_info);
VG_(needs_command_line_options)(cg_process_cmd_line_option,
cg_print_usage,
cg_print_debug_usage);
}
static void cg_post_clo_init(void)
{
cache_t I1c, D1c, L2c;
/* Can't disable both cache and branch profiling */
if ((!clo_cache_sim) && (!clo_branch_sim)) {
VG_UMSG("ERROR: --cache-sim=no --branch-sim=no is not allowed.");
VG_UMSG("You must select cache profiling, or branch profiling, or both.");
VG_(exit)(2);
}
CC_table =
VG_(OSetGen_Create)(offsetof(LineCC, loc),
cmp_CodeLoc_LineCC,
VG_(malloc), "cg.main.cpci.1",
VG_(free));
instrInfoTable =
VG_(OSetGen_Create)(/*keyOff*/0,
NULL,
VG_(malloc), "cg.main.cpci.2",
VG_(free));
stringTable =
VG_(OSetGen_Create)(/*keyOff*/0,
stringCmp,
VG_(malloc), "cg.main.cpci.3",
VG_(free));
configure_caches(&I1c, &D1c, &L2c);
cachesim_I1_initcache(I1c);
cachesim_D1_initcache(D1c);
cachesim_L2_initcache(L2c);
}
VG_DETERMINE_INTERFACE_VERSION(cg_pre_clo_init)
/*--------------------------------------------------------------------*/
/*--- end ---*/
/*--------------------------------------------------------------------*/