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This commit is contained in:
Christian Hergert
2021-09-17 17:11:06 -07:00
parent 5f43a57ab0
commit 728c5081d1
8 changed files with 246 additions and 145 deletions
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60
src/libsysprof/elfparser.c
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@ -124,6 +124,28 @@ MAKE_SYMBOL_ACCESSOR(st_value);
MAKE_SYMBOL_ACCESSOR(st_size);
MAKE_SYMBOL_ACCESSOR(st_shndx);
static gboolean
in_container (void)
{
static gboolean _in_container;
static gboolean initialized;
if (!initialized)
{
/* Flatpak has /.flatpak-info
* Podman has /run/.containerenv
*
* Both have access to host files via /var/run/host.
*/
_in_container = g_file_test ("/.flatpak-info", G_FILE_TEST_EXISTS) ||
g_file_test ("/run/.containerenv", G_FILE_TEST_EXISTS);
initialized = TRUE;
}
return _in_container;
}
static void
section_free (Section *section)
{
@ -252,17 +274,31 @@ elf_parser_new_from_data (const guchar *data,
return parser;
}
ElfParser *
elf_parser_new (const char *filename,
GError **err)
static GMappedFile *
open_mapped_file (const char *filename,
GError **error)
{
GMappedFile *file;
char *alternate = NULL;
if (in_container () && !g_str_has_prefix (filename, g_get_home_dir ()))
filename = alternate = g_build_filename ("/var/run/host", filename, NULL);
file = g_mapped_file_new (filename, FALSE, error);
g_free (alternate);
return file;
}
ElfParser *
elf_parser_new (const char *filename,
GError **error)
{
GMappedFile *file;
const guchar *data;
gsize length;
ElfParser *parser;
GMappedFile *file = g_mapped_file_new (filename, FALSE, NULL);
if (!file)
if (!(file = open_mapped_file (filename, error)))
return NULL;
#if 0
@ -284,6 +320,11 @@ elf_parser_new (const char *filename,
if (!parser)
{
g_set_error (error,
G_FILE_ERROR,
G_FILE_ERROR_FAILED,
"Failed to load ELF from file %s",
filename);
g_mapped_file_unref (file);
return NULL;
}
@ -730,7 +771,8 @@ elf_parser_get_build_id (ElfParser *parser)
}
const char *
elf_parser_get_debug_link (ElfParser *parser, guint32 *crc32)
elf_parser_get_debug_link (ElfParser *parser,
guint32 *crc32)
{
guint64 offset;
const Section *debug_link = find_section (parser, ".gnu_debuglink",
@ -820,7 +862,3 @@ elf_parser_get_sym_address_range (ElfParser *parser,
*begin = sym->address - parser->text_section->load_address;
*end = *begin + st_size (parser, sym->table, sym->offset);
}
/*
* Utility functions
*/