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-rw-r--r--gprof/symtab.c164
1 files changed, 80 insertions, 84 deletions
diff --git a/gprof/symtab.c b/gprof/symtab.c
index e4fda46..ac9e95f 100644
--- a/gprof/symtab.c
+++ b/gprof/symtab.c
@@ -1,3 +1,24 @@
+/* symtab.c
+
+ Copyright (C) 2000 Free Software Foundation, Inc.
+
+ This file is part of GNU Binutils.
+
+ 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. */
+
#include "gprof.h"
#include "cg_arcs.h"
#include "corefile.h"
@@ -6,17 +27,15 @@
Sym_Table symtab;
-/*
- * Initialize a symbol (so it's empty).
- */
+/* Initialize a symbol (so it's empty). */
+
void
DEFUN (sym_init, (sym), Sym * sym)
{
memset (sym, 0, sizeof (*sym));
- /*
- * It is not safe to assume that a binary zero corresponds to
- * a floating-point 0.0, so initialize floats explicitly:
- */
+
+ /* It is not safe to assume that a binary zero corresponds
+ to a floating-point 0.0, so initialize floats explicitly. */
sym->hist.time = 0.0;
sym->cg.child_time = 0.0;
sym->cg.prop.fract = 0.0;
@@ -25,16 +44,15 @@ DEFUN (sym_init, (sym), Sym * sym)
}
-/*
- * Compare the function entry-point of two symbols and return <0, =0,
- * or >0 depending on whether the left value is smaller than, equal
- * to, or greater than the right value. If two symbols are equal
- * but one has is_func set and the other doesn't, we make the
- * non-function symbol one "bigger" so that the function symbol will
- * survive duplicate removal. Finally, if both symbols have the
- * same is_func value, we discriminate against is_static such that
- * the global symbol survives.
- */
+/* Compare the function entry-point of two symbols and return <0, =0,
+ or >0 depending on whether the left value is smaller than, equal
+ to, or greater than the right value. If two symbols are equal
+ but one has is_func set and the other doesn't, we make the
+ non-function symbol one "bigger" so that the function symbol will
+ survive duplicate removal. Finally, if both symbols have the
+ same is_func value, we discriminate against is_static such that
+ the global symbol survives. */
+
static int
DEFUN (cmp_addr, (lp, rp), const PTR lp AND const PTR rp)
{
@@ -42,18 +60,12 @@ DEFUN (cmp_addr, (lp, rp), const PTR lp AND const PTR rp)
Sym *right = (Sym *) rp;
if (left->addr > right->addr)
- {
- return 1;
- }
+ return 1;
else if (left->addr < right->addr)
- {
- return -1;
- }
+ return -1;
if (left->is_func != right->is_func)
- {
- return right->is_func - left->is_func;
- }
+ return right->is_func - left->is_func;
return left->is_static - right->is_static;
}
@@ -66,33 +78,26 @@ DEFUN (symtab_finalize, (tab), Sym_Table * tab)
bfd_vma prev_addr;
if (!tab->len)
- {
- return;
- }
+ return;
- /*
- * Sort symbol table in order of increasing function addresses:
- */
+ /* Sort symbol table in order of increasing function addresses. */
qsort (tab->base, tab->len, sizeof (Sym), cmp_addr);
- /*
- * Remove duplicate entries to speed-up later processing and
- * set end_addr if its not set yet:
- */
+ /* Remove duplicate entries to speed-up later processing and
+ set end_addr if its not set yet. */
prev_addr = tab->base[0].addr + 1;
+
for (src = dst = tab->base; src < tab->limit; ++src)
{
if (src->addr == prev_addr)
{
- /*
- * If same address, favor global symbol over static one,
- * then function over line number. If both symbols are
- * either static or global and either function or line, check
- * whether one has name beginning with underscore while
- * the other doesn't. In such cases, keep sym without
- * underscore. This takes cares of compiler generated
- * symbols (such as __gnu_compiled, __c89_used, etc.).
- */
+ /* If same address, favor global symbol over static one,
+ then function over line number. If both symbols are
+ either static or global and either function or line, check
+ whether one has name beginning with underscore while
+ the other doesn't. In such cases, keep sym without
+ underscore. This takes cares of compiler generated
+ symbols (such as __gnu_compiled, __c89_used, etc.). */
if ((!src->is_static && dst[-1].is_static)
|| ((src->is_static == dst[-1].is_static)
&& ((src->is_func && !dst[-1].is_func)
@@ -109,6 +114,7 @@ DEFUN (symtab_finalize, (tab), Sym_Table * tab)
dst[-1].name, dst[-1].is_static ? 't' : 'T',
dst[-1].is_func ? 'F' : 'f');
printf (" (addr=%lx)\n", (unsigned long) src->addr));
+
dst[-1] = *src;
}
else
@@ -125,11 +131,9 @@ DEFUN (symtab_finalize, (tab), Sym_Table * tab)
else
{
if (dst > tab->base && dst[-1].end_addr == 0)
- {
- dst[-1].end_addr = src->addr - 1;
- }
+ dst[-1].end_addr = src->addr - 1;
- /* retain sym only if it has a non-empty address range: */
+ /* Retain sym only if it has a non-empty address range. */
if (!src->end_addr || src->addr <= src->end_addr)
{
*dst = *src;
@@ -138,10 +142,9 @@ DEFUN (symtab_finalize, (tab), Sym_Table * tab)
}
}
}
+
if (tab->len > 0 && dst[-1].end_addr == 0)
- {
- dst[-1].end_addr = core_text_sect->vma + core_text_sect->_raw_size - 1;
- }
+ dst[-1].end_addr = core_text_sect->vma + core_text_sect->_raw_size - 1;
DBG (AOUTDEBUG | IDDEBUG,
printf ("[symtab_finalize]: removed %d duplicate entries\n",
@@ -154,11 +157,11 @@ DEFUN (symtab_finalize, (tab), Sym_Table * tab)
unsigned int j;
for (j = 0; j < tab->len; ++j)
- {
- printf ("[symtab_finalize] 0x%lx-0x%lx\t%s\n",
- (long) tab->base[j].addr, (long) tab->base[j].end_addr,
- tab->base[j].name);
- }
+ {
+ printf ("[symtab_finalize] 0x%lx-0x%lx\t%s\n",
+ (long) tab->base[j].addr, (long) tab->base[j].end_addr,
+ tab->base[j].name);
+ }
);
}
@@ -178,35 +181,32 @@ DEFUN (dbg_sym_lookup, (symtab, address), Sym_Table * symtab AND bfd_vma address
for (low = 0, high = symtab->len - 1; low != high;)
{
mid = (high + low) >> 1;
+
fprintf (stderr, "[dbg_sym_lookup] low=0x%lx, mid=0x%lx, high=0x%lx\n",
low, mid, high);
fprintf (stderr, "[dbg_sym_lookup] sym[m]=0x%lx sym[m + 1]=0x%lx\n",
(unsigned long) sym[mid].addr,
(unsigned long) sym[mid + 1].addr);
+
if (sym[mid].addr <= address && sym[mid + 1].addr > address)
- {
- return &sym[mid];
- }
+ return &sym[mid];
+
if (sym[mid].addr > address)
- {
- high = mid;
- }
+ high = mid;
else
- {
- low = mid + 1;
- }
+ low = mid + 1;
}
+
fprintf (stderr, "[dbg_sym_lookup] binary search fails???\n");
+
return 0;
}
#endif /* DEBUG */
-/*
- * Look up an address in the symbol-table that is sorted by address.
- * If address does not hit any symbol, 0 is returned.
- */
+/* Look up an address in the symbol-table that is sorted by address.
+ If address does not hit any symbol, 0 is returned. */
Sym *
DEFUN (sym_lookup, (symtab, address), Sym_Table * symtab AND bfd_vma address)
{
@@ -218,23 +218,20 @@ DEFUN (sym_lookup, (symtab, address), Sym_Table * symtab AND bfd_vma address)
#endif /* DEBUG */
if (!symtab->len)
- {
- return 0;
- }
+ return 0;
sym = symtab->base;
for (low = 0, high = symtab->len - 1; low != high;)
{
DBG (LOOKUPDEBUG, ++probes);
mid = (high + low) / 2;
+
if (sym[mid].addr <= address && sym[mid + 1].addr > address)
{
if (address > sym[mid].end_addr)
{
- /*
- * Address falls into gap between sym[mid] and
- * sym[mid + 1]:
- */
+ /* Address falls into gap between
+ sym[mid] and sym[mid + 1]. */
return 0;
}
else
@@ -245,20 +242,18 @@ DEFUN (sym_lookup, (symtab, address), Sym_Table * symtab AND bfd_vma address)
return &sym[mid];
}
}
+
if (sym[mid].addr > address)
- {
- high = mid;
- }
+ high = mid;
else
- {
- low = mid + 1;
- }
+ low = mid + 1;
}
+
if (sym[mid + 1].addr <= address)
{
if (address > sym[mid + 1].end_addr)
{
- /* address is beyond end of sym[mid + 1]: */
+ /* Address is beyond end of sym[mid + 1]. */
return 0;
}
else
@@ -268,5 +263,6 @@ DEFUN (sym_lookup, (symtab, address), Sym_Table * symtab AND bfd_vma address)
return &sym[mid + 1];
}
}
+
return 0;
}
generated by cgit v1.1 at 2024-11-26 18:47:39 +0000