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// Inferno utils/8l/obj.c
// http://code.google.com/p/inferno-os/source/browse/utils/8l/obj.c
//
// Copyright © 1994-1999 Lucent Technologies Inc. All rights reserved.
// Portions Copyright © 1995-1997 C H Forsyth (forsyth@terzarima.net)
// Portions Copyright © 1997-1999 Vita Nuova Limited
// Portions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com)
// Portions Copyright © 2004,2006 Bruce Ellis
// Portions Copyright © 2005-2007 C H Forsyth (forsyth@terzarima.net)
// Revisions Copyright © 2000-2007 Lucent Technologies Inc. and others
// Portions Copyright © 2009 The Go Authors. All rights reserved.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
// Profiling.
#include "l.h"
#include "../ld/lib.h"
void
doprof1(void)
{
#if 0 // TODO(rsc)
Sym *s;
int32 n;
Prog *p, *q;
if(debug['v'])
Bprint(&bso, "%5.2f profile 1\n", cputime());
Bflush(&bso);
s = lookup("__mcount", 0);
n = 1;
for(p = firstp->link; p != P; p = p->link) {
if(p->as == ATEXT) {
q = prg();
q->line = p->line;
q->link = datap;
datap = q;
q->as = ADATA;
q->from.type = D_EXTERN;
q->from.offset = n*4;
q->from.sym = s;
q->from.scale = 4;
q->to = p->from;
q->to.type = D_CONST;
q = prg();
q->line = p->line;
q->pc = p->pc;
q->link = p->link;
p->link = q;
p = q;
p->as = AADDL;
p->from.type = D_CONST;
p->from.offset = 1;
p->to.type = D_EXTERN;
p->to.sym = s;
p->to.offset = n*4 + 4;
n += 2;
continue;
}
}
q = prg();
q->line = 0;
q->link = datap;
datap = q;
q->as = ADATA;
q->from.type = D_EXTERN;
q->from.sym = s;
q->from.scale = 4;
q->to.type = D_CONST;
q->to.offset = n;
s->type = SBSS;
s->size = n*4;
#endif
}
void
doprof2(void)
{
Sym *s2, *s4;
Prog *p, *q, *ps2, *ps4;
if(debug['v'])
Bprint(&bso, "%5.2f profile 2\n", cputime());
Bflush(&bso);
s2 = lookup("_profin", 0);
s4 = lookup("_profout", 0);
if(s2->type != STEXT || s4->type != STEXT) {
diag("_profin/_profout not defined");
return;
}
ps2 = P;
ps4 = P;
for(cursym = textp; cursym != nil; cursym = cursym->next) {
p = cursym->text;
if(p->from.sym == s2) {
p->from.scale = 1;
ps2 = p;
}
if(p->from.sym == s4) {
p->from.scale = 1;
ps4 = p;
}
}
for(cursym = textp; cursym != nil; cursym = cursym->next) {
p = cursym->text;
if(p->from.scale & NOPROF) /* dont profile */
continue;
/*
* JMPL profin
*/
q = prg();
q->line = p->line;
q->pc = p->pc;
q->link = p->link;
p->link = q;
p = q;
p->as = ACALL;
p->to.type = D_BRANCH;
p->pcond = ps2;
p->to.sym = s2;
for(; p; p=p->link) {
if(p->as == ARET) {
/*
* RET
*/
q = prg();
q->as = ARET;
q->from = p->from;
q->to = p->to;
q->link = p->link;
p->link = q;
/*
* JAL profout
*/
p->as = ACALL;
p->from = zprg.from;
p->to = zprg.to;
p->to.type = D_BRANCH;
p->pcond = ps4;
p->to.sym = s4;
p = q;
}
}
}
}