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libsysprof: add helper to decode symbols with address range

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This commit is contained in:
Christian Hergert
2019-05-28 12:14:15 -07:00
parent e39feeeeb0
commit b17ff843d7
2 changed files with 71 additions and 19 deletions
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78
src/libsysprof/sysprof-elf-symbol-resolver.c
View File

@ -259,33 +259,42 @@ guess_tag (SysprofElfSymbolResolver *self,
return GPOINTER_TO_SIZE (g_hash_table_lookup (self->tag_cache, map->filename)); return GPOINTER_TO_SIZE (g_hash_table_lookup (self->tag_cache, map->filename));
} }
static gchar * gboolean
sysprof_elf_symbol_resolver_resolve_with_context (SysprofSymbolResolver *resolver, sysprof_elf_symbol_resolver_resolve_full (SysprofElfSymbolResolver *self,
guint64 time, guint64 time,
GPid pid, GPid pid,
SysprofAddressContext context, SysprofAddressContext context,
SysprofCaptureAddress address, SysprofCaptureAddress address,
GQuark *tag) SysprofCaptureAddress *begin,
SysprofCaptureAddress *end,
gchar **name,
GQuark *tag)
{ {
SysprofElfSymbolResolver *self = (SysprofElfSymbolResolver *)resolver;
const bin_symbol_t *bin_sym;
SysprofMapLookaside *lookaside; SysprofMapLookaside *lookaside;
const bin_symbol_t *bin_sym;
const gchar *bin_sym_name; const gchar *bin_sym_name;
const SysprofMap *map; const SysprofMap *map;
bin_file_t *bin_file; bin_file_t *bin_file;
gulong ubegin;
gulong uend;
g_assert (SYSPROF_IS_ELF_SYMBOL_RESOLVER (self)); g_assert (SYSPROF_IS_ELF_SYMBOL_RESOLVER (self));
g_assert (name != NULL);
g_assert (begin != NULL);
g_assert (end != NULL);
*name = NULL;
if (context != SYSPROF_ADDRESS_CONTEXT_USER) if (context != SYSPROF_ADDRESS_CONTEXT_USER)
return NULL; return FALSE;
lookaside = g_hash_table_lookup (self->lookasides, GINT_TO_POINTER (pid)); lookaside = g_hash_table_lookup (self->lookasides, GINT_TO_POINTER (pid));
if (lookaside == NULL) if G_UNLIKELY (lookaside == NULL)
return NULL; return FALSE;
map = sysprof_map_lookaside_lookup (lookaside, address); map = sysprof_map_lookaside_lookup (lookaside, address);
if (map == NULL) if G_UNLIKELY (map == NULL)
return NULL; return FALSE;
address -= map->start; address -= map->start;
address += map->offset; address += map->offset;
@ -294,16 +303,49 @@ sysprof_elf_symbol_resolver_resolve_with_context (SysprofSymbolResolver *resolve
g_assert (bin_file != NULL); g_assert (bin_file != NULL);
if (map->inode && !bin_file_check_inode (bin_file, map->inode)) if G_UNLIKELY (map->inode && !bin_file_check_inode (bin_file, map->inode))
return g_strdup_printf ("%s: inode mismatch", map->filename); {
*name = g_strdup_printf ("%s: inode mismatch", map->filename);
return TRUE;
}
bin_sym = bin_file_lookup_symbol (bin_file, address); bin_sym = bin_file_lookup_symbol (bin_file, address);
bin_sym_name = bin_symbol_get_name (bin_file, bin_sym); bin_sym_name = bin_symbol_get_name (bin_file, bin_sym);
if (map->filename) if G_LIKELY (map->filename)
*tag = guess_tag (self, map); *tag = guess_tag (self, map);
return elf_demangle (bin_sym_name); *name = elf_demangle (bin_sym_name);
bin_symbol_get_address_range (bin_file, bin_sym, &ubegin, &uend);
*begin = ubegin;
*end = uend;
return TRUE;
}
static gchar *
sysprof_elf_symbol_resolver_resolve_with_context (SysprofSymbolResolver *resolver,
guint64 time,
GPid pid,
SysprofAddressContext context,
SysprofCaptureAddress address,
GQuark *tag)
{
gchar *name = NULL;
SysprofCaptureAddress begin, end;
sysprof_elf_symbol_resolver_resolve_full (SYSPROF_ELF_SYMBOL_RESOLVER (resolver),
time,
pid,
context,
address,
&begin,
&end,
&name,
tag);
return g_steal_pointer (&name);
} }
static void static void

12
src/libsysprof/sysprof-elf-symbol-resolver.h
View File

@ -35,6 +35,16 @@ SYSPROF_AVAILABLE_IN_ALL
G_DECLARE_FINAL_TYPE (SysprofElfSymbolResolver, sysprof_elf_symbol_resolver, SYSPROF, ELF_SYMBOL_RESOLVER, GObject) G_DECLARE_FINAL_TYPE (SysprofElfSymbolResolver, sysprof_elf_symbol_resolver, SYSPROF, ELF_SYMBOL_RESOLVER, GObject)
SYSPROF_AVAILABLE_IN_ALL SYSPROF_AVAILABLE_IN_ALL
SysprofSymbolResolver *sysprof_elf_symbol_resolver_new (void); SysprofSymbolResolver *sysprof_elf_symbol_resolver_new (void);
SYSPROF_AVAILABLE_IN_ALL
gboolean sysprof_elf_symbol_resolver_resolve_full (SysprofElfSymbolResolver *self,
guint64 time,
GPid pid,
SysprofAddressContext context,
SysprofCaptureAddress address,
SysprofCaptureAddress *begin,
SysprofCaptureAddress *end,
gchar **name,
GQuark *tag);
G_END_DECLS G_END_DECLS