Update.
1998-06-08 13:34 Ulrich Drepper <drepper@cygnus.com> * elf/sprof.c: Implement call graph profiling. * sysdeps/generic/getenv.c: Optimize to use strncmp less often. 1998-06-07 Andreas Jaeger <aj@arthur.rhein-neckar.de> * pwd/fgetpwent_r.c (__fgetpwent_r): Correct buffer overflow fix. * grp/fgetgrent_r.c (__fgetgrent_r): Likewise. * shadow/fgetspent_r.c (__fgetspent_r): Likewise. Noticed by Jake Garver <garver@valkyrie.net>. 1998-06-07 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * libio/genops.c (__underflow): Read character from read pointer as unsigned. (__uflow): Likewise.
This commit is contained in:
Ulrich Drepper
parent
c0fb8a563c
commit
31f7410f5c
19
ChangeLog
19
ChangeLog
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@ -1,3 +1,22 @@
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1998-06-08 13:34 Ulrich Drepper <drepper@cygnus.com>
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* elf/sprof.c: Implement call graph profiling.
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* sysdeps/generic/getenv.c: Optimize to use strncmp less often.
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1998-06-07 Andreas Jaeger <aj@arthur.rhein-neckar.de>
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* pwd/fgetpwent_r.c (__fgetpwent_r): Correct buffer overflow fix.
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* grp/fgetgrent_r.c (__fgetgrent_r): Likewise.
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* shadow/fgetspent_r.c (__fgetspent_r): Likewise.
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Noticed by Jake Garver <garver@valkyrie.net>.
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1998-06-07 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
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* libio/genops.c (__underflow): Read character from read pointer
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as unsigned.
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(__uflow): Likewise.
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1998-06-07 13:32 Ulrich Drepper <drepper@cygnus.com>
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* libc.map: Add _dl_profile.
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223
elf/sprof.c
223
elf/sprof.c
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@ -76,6 +76,7 @@ static const struct argp_option options[] =
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{ NULL, 0, NULL, 0, N_("Output selection:") },
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{ "flat-profile", 'p', NULL, 0,
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N_("generate flat profile with counts and ticks") },
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{ "graph", 'q', NULL, 0, N_("generate call graph") },
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{ "test", OPT_TEST, NULL, OPTION_HIDDEN, NULL },
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{ NULL, 0, NULL, 0, NULL }
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@ -102,8 +103,9 @@ static enum
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{
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NONE = 0,
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FLAT_MODE = 1 << 0,
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CALL_GRAPH_MODE = 1 << 1,
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DEFAULT_MODE = FLAT_MODE
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DEFAULT_MODE = FLAT_MODE | CALL_GRAPH_MODE
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} mode;
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/* If nonzero the total number of invocations of a function is emitted. */
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@ -114,20 +116,32 @@ int do_test;
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/* Strcuture describing calls. */
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struct here_fromstruct
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{
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struct here_cg_arc_record volatile *here;
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uint16_t link;
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};
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{
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struct here_cg_arc_record volatile *here;
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uint16_t link;
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};
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/* We define a special type to address the elements of the arc table.
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This is basically the `gmon_cg_arc_record' format but it includes
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the room for the tag and it uses real types. */
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struct here_cg_arc_record
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{
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uintptr_t from_pc;
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uintptr_t self_pc;
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uint32_t count;
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} __attribute__ ((packed));
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{
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uintptr_t from_pc;
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uintptr_t self_pc;
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uint32_t count;
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} __attribute__ ((packed));
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struct known_symbol;
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struct arc_list
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{
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size_t idx;
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uintmax_t count;
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struct arc_list *next;
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};
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static struct obstack ob_list;
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struct known_symbol
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@ -138,6 +152,9 @@ struct known_symbol
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uintmax_t ticks;
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uintmax_t calls;
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struct arc_list *froms;
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struct arc_list *tos;
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};
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@ -198,7 +215,9 @@ static void unload_profdata (struct profdata *profdata);
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static void count_total_ticks (struct shobj *shobj, struct profdata *profdata);
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static void count_calls (struct shobj *shobj, struct profdata *profdata);
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static void read_symbols (struct shobj *shobj);
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static void add_arcs (struct profdata *profdata);
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static void generate_flat_profile (struct profdata *profdata);
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static void generate_call_graph (struct profdata *profdata);
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int
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@ -278,6 +297,9 @@ no filename for profiling data given and shared object `%s' has no soname"),
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/* Count the calls. */
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count_calls (shobj_handle, profdata_handle);
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/* Add the arc information. */
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add_arcs (profdata_handle);
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/* If no mode is specified fall back to the default mode. */
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if (mode == NONE)
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mode = DEFAULT_MODE;
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@ -286,6 +308,9 @@ no filename for profiling data given and shared object `%s' has no soname"),
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if (mode & FLAT_MODE)
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generate_flat_profile (profdata_handle);
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if (mode & CALL_GRAPH_MODE)
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generate_call_graph (profdata_handle);
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/* Free the resources. */
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unload_shobj (shobj_handle);
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unload_profdata (profdata_handle);
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@ -300,6 +325,12 @@ parse_opt (int key, char *arg, struct argp_state *state)
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{
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switch (key)
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{
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case 'p':
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mode |= FLAT_MODE;
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break;
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case 'q':
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mode |= CALL_GRAPH_MODE;
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break;
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case OPT_TEST:
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do_test = 1;
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break;
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@ -800,7 +831,7 @@ count_total_ticks (struct shobj *shobj, struct profdata *profdata)
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}
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static struct known_symbol *
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static size_t
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find_symbol (uintptr_t addr)
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{
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size_t sidx = 0;
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@ -811,7 +842,7 @@ find_symbol (uintptr_t addr)
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uintptr_t end = start + sortsym[sidx]->size;
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if (addr >= start && addr < end)
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return sortsym[sidx];
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return sidx;
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if (addr < start)
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break;
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@ -819,7 +850,7 @@ find_symbol (uintptr_t addr)
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++sidx;
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}
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return NULL;
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return (size_t) -1l;
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}
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@ -833,12 +864,12 @@ count_calls (struct shobj *shobj, struct profdata *profdata)
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for (cnt = 0; cnt < narcs; ++cnt)
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{
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uintptr_t here = data[cnt].self_pc;
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struct known_symbol *symbol;
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size_t symbol_idx;
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/* Find the symbol for this address. */
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symbol = find_symbol (here);
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if (symbol != NULL)
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symbol->calls += data[cnt].count;
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symbol_idx = find_symbol (here);
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if (symbol_idx != (size_t) -1l)
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sortsym[symbol_idx]->calls += data[cnt].count;
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}
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}
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@ -846,8 +877,8 @@ count_calls (struct shobj *shobj, struct profdata *profdata)
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static int
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symorder (const void *o1, const void *o2)
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{
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const struct known_symbol *p1 = (struct known_symbol *) o1;
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const struct known_symbol *p2 = (struct known_symbol *) o2;
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const struct known_symbol *p1 = (const struct known_symbol *) o1;
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const struct known_symbol *p2 = (const struct known_symbol *) o2;
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return p1->addr - p2->addr;
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}
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@ -872,6 +903,7 @@ read_symbols (struct shobj *shobj)
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#define obstack_chunk_free free
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obstack_init (&shobj->ob_str);
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obstack_init (&shobj->ob_sym);
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obstack_init (&ob_list);
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/* Process the symbols. */
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if (shobj->symtab)
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@ -947,6 +979,8 @@ read_symbols (struct shobj *shobj)
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newsym->addr = symtab->st_value;
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newsym->size = symtab->st_size;
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newsym->ticks = 0;
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newsym->froms = NULL;
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newsym->tos = NULL;
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existp = tfind (newsym, &symroot, symorder);
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if (existp == NULL)
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@ -979,6 +1013,85 @@ read_symbols (struct shobj *shobj)
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}
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static void
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add_arcs (struct profdata *profdata)
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{
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uint32_t narcs = profdata->narcs;
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struct here_cg_arc_record *data = profdata->data;
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uint32_t cnt;
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for (cnt = 0; cnt < narcs; ++cnt)
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{
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/* First add the incoming arc. */
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size_t sym_idx = find_symbol (data[cnt].self_pc);
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if (sym_idx != (size_t) -1l)
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{
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struct known_symbol *sym = sortsym[sym_idx];
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struct arc_list *runp = sym->froms;
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while (runp != NULL
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&& ((data[cnt].from_pc == 0 && runp->idx != (size_t) -1l)
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|| (data[cnt].from_pc != 0
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&& (runp->idx == (size_t) -1l
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|| data[cnt].from_pc < sortsym[runp->idx]->addr
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|| (data[cnt].from_pc
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>= (sortsym[runp->idx]->addr
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+ sortsym[runp->idx]->size))))))
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runp = runp->next;
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if (runp == NULL)
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{
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/* We need a new entry. */
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struct arc_list *newp = (struct arc_list *)
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obstack_alloc (&ob_list, sizeof (struct arc_list));
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if (data[cnt].from_pc == 0)
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newp->idx = (size_t) -1l;
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else
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newp->idx = find_symbol (data[cnt].from_pc);
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newp->count = data[cnt].count;
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newp->next = sym->froms;
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sym->froms = newp;
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}
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else
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/* Increment the counter for the found entry. */
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runp->count += data[cnt].count;
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}
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/* Now add it to the appropriate outgoing list. */
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sym_idx = find_symbol (data[cnt].from_pc);
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if (sym_idx != (size_t) -1l)
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{
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struct known_symbol *sym = sortsym[sym_idx];
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struct arc_list *runp = sym->tos;
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while (runp != NULL
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&& (runp->idx == (size_t) -1l
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|| data[cnt].self_pc < sortsym[runp->idx]->addr
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|| data[cnt].self_pc >= (sortsym[runp->idx]->addr
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+ sortsym[runp->idx]->size)))
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runp = runp->next;
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if (runp == NULL)
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{
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/* We need a new entry. */
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struct arc_list *newp = (struct arc_list *)
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obstack_alloc (&ob_list, sizeof (struct arc_list));
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newp->idx = find_symbol (data[cnt].self_pc);
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newp->count = data[cnt].count;
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newp->next = sym->tos;
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sym->tos = newp;
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}
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else
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/* Increment the counter for the found entry. */
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runp->count += data[cnt].count;
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}
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}
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}
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static int
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countorder (const void *p1, const void *p2)
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{
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@ -1007,13 +1120,13 @@ printflat (const void *node, VISIT value, int level)
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cumu_ticks += s->ticks;
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printf ("%6.2f%10.2f%9.2f%9" PRIdMAX "%9.2f%9.2f %s\n",
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printf ("%6.2f%10.2f%9.2f%9" PRIdMAX "%9.2f %s\n",
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total_ticks ? (100.0 * s->ticks) / total_ticks : 0.0,
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tick_unit * cumu_ticks,
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tick_unit * s->ticks,
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s->calls,
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s->calls ? (s->ticks * 1000000) * tick_unit / s->calls : 0,
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0.0, /* FIXME: don't know about called functions. */
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/* FIXME: don't know about called functions. */
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s->name);
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}
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}
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@ -1049,3 +1162,71 @@ generate_flat_profile (struct profdata *profdata)
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tdestroy (data, freenoop);
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}
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static void
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generate_call_graph (struct profdata *profdata)
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{
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size_t cnt;
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puts ("\nindex % time self children called name\n");
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for (cnt = 0; cnt < symidx; ++cnt)
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if (sortsym[cnt]->froms != NULL || sortsym[cnt]->tos != NULL)
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{
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struct arc_list *runp;
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size_t n;
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/* First print the from-information. */
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runp = sortsym[cnt]->froms;
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while (runp != NULL)
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{
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printf (" %8.2f%8.2f%9" PRIdMAX "/%-9" PRIdMAX " %s",
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(runp->idx != (size_t) -1l
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? sortsym[runp->idx]->ticks * tick_unit : 0.0),
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0.0, /* FIXME: what's time for the childern, recursive */
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runp->count, sortsym[cnt]->calls,
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(runp->idx != (size_t) -1l ?
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sortsym[runp->idx]->name : "<UNKNOWN>"));
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if (runp->idx != (size_t) -1l)
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printf (" [%Zd]", runp->idx);
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putchar_unlocked ('\n');
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runp = runp->next;
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}
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/* Info abount the function itself. */
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n = printf ("[%d]", cnt);
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printf ("%*s%5.1f%8.2f%8.2f%9" PRIdMAX " %s [%Zd]\n",
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7 - n, " ",
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total_ticks ? (100.0 * sortsym[cnt]->ticks) / total_ticks : 0,
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sortsym[cnt]->ticks * tick_unit,
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0.0, /* FIXME: what's time for the childern, recursive */
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sortsym[cnt]->calls,
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sortsym[cnt]->name, cnt);
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/* Info about the functions this function calls. */
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runp = sortsym[cnt]->tos;
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while (runp != NULL)
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{
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printf (" %8.2f%8.2f%9" PRIdMAX "/",
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(runp->idx != (size_t) -1l
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? sortsym[runp->idx]->ticks * tick_unit : 0.0),
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0.0, /* FIXME: what's time for the childern, recursive */
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runp->count);
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if (runp->idx != (size_t) -1l)
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printf ("%-9" PRIdMAX " %s [%Zd]\n",
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sortsym[runp->idx]->calls,
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sortsym[runp->idx]->name,
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runp->idx);
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else
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fputs ("??? <UNKNOWN>\n\n", stdout);
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runp = runp->next;
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}
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fputs ("-----------------------------------------------\n", stdout);
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}
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}
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|
|
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@ -61,14 +61,14 @@ __fgetgrent_r (FILE *stream, struct group *resbuf, char *buffer, size_t buflen,
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|
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do
|
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{
|
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buffer[buflen] = '\xff';
|
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buffer[buflen - 1] = '\xff';
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p = fgets (buffer, buflen, stream);
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if (p == NULL && feof (stream))
|
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{
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*result = NULL;
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return errno;
|
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}
|
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if (p == NULL || buffer[buflen] != '\xff')
|
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if (p == NULL || buffer[buflen - 1] != '\xff')
|
||||
{
|
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*result = NULL;
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return errno = ERANGE;
|
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|
|
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|
|
@ -273,7 +273,7 @@ __underflow (fp)
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{
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_IO_switch_to_main_get_area (fp);
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if (fp->_IO_read_ptr < fp->_IO_read_end)
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return *fp->_IO_read_ptr;
|
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return *(unsigned char *) fp->_IO_read_ptr;
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}
|
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if (_IO_have_markers (fp))
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{
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|
@ -298,7 +298,7 @@ __uflow (fp)
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{
|
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_IO_switch_to_main_get_area (fp);
|
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if (fp->_IO_read_ptr < fp->_IO_read_end)
|
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return *fp->_IO_read_ptr++;
|
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return *(unsigned char *) fp->_IO_read_ptr++;
|
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}
|
||||
if (_IO_have_markers (fp))
|
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{
|
||||
|
|
|
|||
|
|
@ -74,14 +74,14 @@ __fgetpwent_r (FILE *stream, struct passwd *resbuf, char *buffer,
|
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|
||||
do
|
||||
{
|
||||
buffer[buflen] = '\xff';
|
||||
buffer[buflen - 1] = '\xff';
|
||||
p = fgets (buffer, buflen, stream);
|
||||
if (p == NULL && feof (stream))
|
||||
{
|
||||
*result = NULL;
|
||||
return errno;
|
||||
}
|
||||
if (p == NULL || buffer[buflen] != '\xff')
|
||||
if (p == NULL || buffer[buflen - 1] != '\xff')
|
||||
{
|
||||
*result = NULL;
|
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return errno = ERANGE;
|
||||
|
|
|
|||
|
|
@ -41,14 +41,14 @@ __fgetspent_r (FILE *stream, struct spwd *resbuf, char *buffer, size_t buflen,
|
|||
|
||||
do
|
||||
{
|
||||
buffer[buflen] = '\xff';
|
||||
buffer[buflen - 1] = '\xff';
|
||||
p = fgets (buffer, buflen, stream);
|
||||
if (p == NULL && feof (stream))
|
||||
{
|
||||
*result = NULL;
|
||||
return errno;
|
||||
}
|
||||
if (p == NULL || buffer[buflen] != '\xff')
|
||||
if (p == NULL || buffer[buflen - 1] != '\xff')
|
||||
{
|
||||
*result = NULL;
|
||||
return errno = ERANGE;
|
||||
|
|
|
|||
|
|
@ -1,4 +1,4 @@
|
|||
/* Copyright (C) 1991, 1992, 1994, 1996 Free Software Foundation, Inc.
|
||||
/* Copyright (C) 1991, 1992, 1994, 1996, 1998 Free Software Foundation, Inc.
|
||||
This file is part of the GNU C Library.
|
||||
|
||||
The GNU C Library is free software; you can redistribute it and/or
|
||||
|
|
@ -16,7 +16,9 @@
|
|||
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
||||
Boston, MA 02111-1307, USA. */
|
||||
|
||||
#include <endian.h>
|
||||
#include <errno.h>
|
||||
#include <stdint.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <unistd.h>
|
||||
|
|
@ -25,20 +27,74 @@
|
|||
#define __environ environ
|
||||
#endif
|
||||
|
||||
/* Return the value of the environment variable NAME. */
|
||||
/* Return the value of the environment variable NAME. This implementation
|
||||
is tuned a bit in that it assumes no environment variable has an empty
|
||||
name which of course should always be true. We have a special case for
|
||||
one character names so that for the general case we can assume at least
|
||||
two characters which we can access. By doing this we can avoid using the
|
||||
`strncmp' most of the time. */
|
||||
char *
|
||||
getenv (name)
|
||||
const char *name;
|
||||
{
|
||||
const size_t len = strlen (name);
|
||||
char **ep;
|
||||
uint16_t name_start;
|
||||
|
||||
if (__environ == NULL)
|
||||
if (__environ == NULL || name[0] == '\0')
|
||||
return NULL;
|
||||
|
||||
for (ep = __environ; *ep != NULL; ++ep)
|
||||
if (!strncmp (*ep, name, len) && (*ep)[len] == '=')
|
||||
return &(*ep)[len + 1];
|
||||
if (name[1] == '\0')
|
||||
{
|
||||
/* The name of the variable consists of only one character. Therefore
|
||||
the first two characters of the environment entry are this character
|
||||
and a '=' character. */
|
||||
#if __BYTE_ORDER == __LITTLE_ENDIAN
|
||||
name_start = ('=' << 8) | *(const unsigned char *) name;
|
||||
#else
|
||||
# if __BYTE_ORDER == __BIG_ENDIAN
|
||||
name_start = '=' | ((*(const unsigned char *) name) << 8);
|
||||
# else
|
||||
#error "Funny byte order."
|
||||
# endif
|
||||
#endif
|
||||
for (ep = __environ; *ep != NULL; ++ep)
|
||||
{
|
||||
#if _STRING_ARCH_unaligned
|
||||
uint16_t ep_start = *(uint16_t *) *ep;
|
||||
#else
|
||||
uint16_t ep_start = (((unsigned char *) *ep)[0]
|
||||
| (((unsigned char *) *ep)[1] << 8));
|
||||
#endif
|
||||
if (name_start == ep_start)
|
||||
return &(*ep)[2];
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
#if _STRING_ARCH_unaligned
|
||||
name_start = *(const uint16_t *) name;
|
||||
#else
|
||||
name_start = (((const unsigned char *) name)[0]
|
||||
| (((const unsigned char *) name)[1] << 8));
|
||||
#endif
|
||||
len -= 2;
|
||||
name += 2;
|
||||
|
||||
for (ep = __environ; *ep != NULL; ++ep)
|
||||
{
|
||||
#if _STRING_ARCH_unaligned
|
||||
uint16_t ep_start = *(uint16_t *) *ep;
|
||||
#else
|
||||
uint16_t ep_start = (((unsigned char *) *ep)[0]
|
||||
| (((unsigned char *) *ep)[1] << 8));
|
||||
#endif
|
||||
|
||||
if (name_start == ep_start && !strncmp (*ep + 2, name, len)
|
||||
&& (*ep)[len + 2] == '=')
|
||||
return &(*ep)[len + 3];
|
||||
}
|
||||
}
|
||||
|
||||
return NULL;
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue