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More informative errors when symbols can't be found

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This commit is contained in:
Søren Sandmann Pedersen
2009-09-07 21:57:20 -04:00
parent 29e270cb8d
commit c3288467bc
1 changed files with 50 additions and 90 deletions
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140
tracker.c
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@ -641,96 +641,19 @@ process_locate_map (process_t *process, gulong addr)
return NULL;
}
const char *
lookup_user_symbol (process_t *process, uint64_t address)
static const char *
make_message (state_t *state, const char *message)
{
static const char *const kernel = "[kernel]";
const BinSymbol *result;
map_t *map = process_locate_map (process, address);
#if 0
g_print ("addr: %x\n", address);
#endif
if (address == 0x1)
char *result = g_hash_table_lookup (state->unique_comms, message);
if (!result)
{
return kernel;
result = g_strdup (message);
g_hash_table_insert (state->unique_comms, (char *)result, (char *)result);
}
else if (!map)
{
if (!process->undefined)
{
g_print ("no map for %llx in %d (%s)\n", address, process->pid, process->comm);
process->undefined =
g_strdup_printf ("No map (%s)", process->comm);
}
return process->undefined;
}
#if 0
if (strcmp (map->filename, "/home/ssp/sysprof/sysprof") == 0)
{
g_print ("YES\n");
g_print ("map address: %lx\n", map->start);
g_print ("map offset: %lx\n", map->offset);
g_print ("address before: %lx (%s)\n", address, map->filename);
}
g_print ("address before: \n");
#endif
#if 0
g_print ("%s is mapped at %lx + %lx\n", map->filename, map->start, map->offset);
g_print ("incoming address: %lx\n", address);
#endif
address -= map->start;
address += map->offset;
#if 0
if (strcmp (map->filename, "[vdso]") == 0)
{
g_print ("address after: %lx\n", address);
}
#endif
if (!map->bin_file)
map->bin_file = bin_file_new (map->filename);
/* g_print ("%s: start: %p, load: %p\n", */
/* map->filename, map->start, bin_file_get_load_address (map->bin_file)); */
if (!bin_file_check_inode (map->bin_file, map->inode))
{
/* If the inodes don't match, it's probably because the
* file has changed since the process was started. Just return
* the undefined symbol in that case.
*/
address = 0x0;
}
result = bin_file_lookup_symbol (map->bin_file, address);
#if 0
g_print (" ---> %s\n", result->name);
#endif
/* g_print ("(%x) %x %x name; %s\n", address, map->start,
* map->offset, result->name);
*/
#if 0
g_print ("name: %s (in %s)\n", bin_symbol_get_name (map->bin_file, result), map->filename);
g_print (" in addr: %lx\n", address);
g_print (" out addr: %lx\n", bin_symbol_get_address (map->bin_file, result));
g_print (" map start: %lx\n", map->start);
g_print (" map offset: %lx\n", map->offset);
#endif
return bin_symbol_get_name (map->bin_file, result);
return result;
}
static char *
@ -749,7 +672,44 @@ lookup_symbol (state_t *state,
}
else
{
sym = lookup_user_symbol (process, address);
map_t *map = process_locate_map (process, address);
if (!map)
{
char *message = g_strdup_printf ("No map [%s]", process->comm);
sym = make_message (state, message);
g_free (message);
}
else
{
const BinSymbol *bin_sym;
address -= map->start;
address += map->offset;
if (!map->bin_file)
map->bin_file = bin_file_new (map->filename);
if (map->inode && !bin_file_check_inode (map->bin_file, map->inode))
{
/* If the inodes don't match, it's probably because the
* file has changed since the process was started.
*/
char *message = g_strdup_printf ("inode mismatch for %s", map->filename);
sym = make_message (state, message);
g_free (message);
}
else
{
bin_sym = bin_file_lookup_symbol (map->bin_file, address);
sym = bin_symbol_get_name (map->bin_file, bin_sym);
}
}
}
if (sym)
@ -800,6 +760,7 @@ process_sample (state_t *state, StackStash *resolved, sample_t *sample)
uint64_t *resolved_traces;
process_t *process;
StackNode *n;
char *cmdline;
int len;
process = g_hash_table_lookup (
@ -833,7 +794,7 @@ process_sample (state_t *state, StackStash *resolved, sample_t *sample)
if (new_context)
{
if (context)
symbol = context->name;
symbol = unique_dup (state->unique_symbols, context->name);
else
symbol = NULL;
@ -849,7 +810,6 @@ process_sample (state_t *state, StackStash *resolved, sample_t *sample)
if (symbol)
resolved_traces[len++] = POINTER_TO_U64 (symbol);
}
char *cmdline;
cmdline = g_hash_table_lookup (
state->unique_comms, process->comm);