pjs/tools/jprof/bfd.cpp

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2.9 KiB
C++
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// vim:ts=8:sw=2:et:
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// The contents of this file are subject to the Mozilla Public License
// Version 1.1 (the "License"); you may not use this file except in
// compliance with the License. You may obtain a copy of the License
// at http://www.mozilla.org/MPL/
//
// Software distributed under the License is distributed on an "AS IS"
// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
// the License for the specific language governing rights and
// limitations under the License.
//
// The Initial Developer of the Original Code is Kipp E.B. Hickman.
#include "leaky.h"
#ifdef USE_BFD
#include <stdio.h>
#include <string.h>
#include <bfd.h>
extern "C" {
char *cplus_demangle (const char *mangled, int options);
}
#define NEXT_SYMBOL \
sp++; \
if (sp >= lastSymbol) { \
long n = numExternalSymbols + 10000; \
externalSymbols = (Symbol*) \
realloc(externalSymbols, (size_t) (sizeof(Symbol) * n)); \
lastSymbol = externalSymbols + n; \
sp = externalSymbols + numExternalSymbols; \
numExternalSymbols = n; \
}
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void leaky::ReadSymbols(const char *aFileName, u_long aBaseAddress)
{
int initialSymbols = usefulSymbols;
if (NULL == externalSymbols) {
externalSymbols = (Symbol*) malloc(sizeof(Symbol) * 10000);
numExternalSymbols = 10000;
}
Symbol* sp = externalSymbols + usefulSymbols;
Symbol* lastSymbol = externalSymbols + numExternalSymbols;
// Create a dummy symbol for the library so, if it doesn't have any
// symbols, we show it by library.
sp->Init(aFileName, aBaseAddress);
NEXT_SYMBOL
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static bfd_boolean kDynamic = (bfd_boolean) false;
static int firstTime = 1;
if (firstTime) {
firstTime = 0;
bfd_init ();
}
bfd* lib = bfd_openr(aFileName, NULL);
if (NULL == lib) {
return;
}
char **matching;
if (!bfd_check_format_matches(lib, bfd_object, &matching)) {
bfd_close(lib);
return;
}
asymbol* store;
store = bfd_make_empty_symbol(lib);
// read mini symbols
PTR minisyms;
unsigned int size;
long symcount = bfd_read_minisymbols(lib, kDynamic, &minisyms, &size);
// Scan symbols
bfd_byte* from = (bfd_byte *) minisyms;
bfd_byte* fromend = from + symcount * size;
for (; from < fromend; from += size) {
asymbol *sym;
sym = bfd_minisymbol_to_symbol(lib, kDynamic, (const PTR) from, store);
symbol_info syminfo;
bfd_get_symbol_info (lib, sym, &syminfo);
// if ((syminfo.type == 'T') || (syminfo.type == 't')) {
const char* nm = bfd_asymbol_name(sym);
if (nm && nm[0]) {
char* dnm = NULL;
if (strncmp("__thunk", nm, 7)) {
dnm = cplus_demangle(nm, 1);
}
sp->Init(dnm ? dnm : nm, syminfo.value + aBaseAddress);
NEXT_SYMBOL
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}
// }
}
bfd_close(lib);
int interesting = sp - externalSymbols;
if (!quiet) {
printf("%s provided %d symbols\n", aFileName,
interesting - initialSymbols);
}
usefulSymbols = interesting;
}
#endif /* USE_BFD */