def parse_general():
global jeheap
try:
jeheap.narenas = dbg.to_int(dbg.get_value('narenas'))
except:
print('[shadow] error: symbol narenas not found')
sys.exit()
try:
jeheap.nbins = dbg.to_int(dbg.get_value('nbins'))
except:
# XXX: these are firefox specific, we must add support for more
# jemalloc variants in the future
if sys.platform == 'darwin' or sys.platform == 'win32':
jeheap.ntbins = dbg.to_int(dbg.get_value('ntbins'))
jeheap.nsbins = dbg.to_int(dbg.get_value('nsbins'))
jeheap.nqbins = dbg.to_int(dbg.get_value('nqbins'))
jeheap.nbins = jeheap.ntbins + jeheap.nsbins + jeheap.nqbins
else:
if jeheap.DWORD_SIZE == 4:
jeheap.nbins = 36
elif jeheap.DWORD_SIZE == 8:
jeheap.nbins = 35
# XXX: figure out how to calculate the chunk size correctly, this is
# firefox specific
jeheap.chunk_size = 1 << 20
def parse_general():
global jeheap
try:
jeheap.narenas = dbg.to_int(dbg.get_value("narenas"))
except:
print("[shadow] error: symbol narenas not found")
sys.exit()
try:
jeheap.nbins = dbg.to_int(dbg.get_value("nbins"))
except:
# XXX: these are firefox specific, we must add support for more
# jemalloc variants in the future
if sys.platform == "darwin" or sys.platform == "win32":
jeheap.ntbins = dbg.to_int(dbg.get_value("ntbins"))
jeheap.nsbins = dbg.to_int(dbg.get_value("nsbins"))
jeheap.nqbins = dbg.to_int(dbg.get_value("nqbins"))
jeheap.nbins = jeheap.ntbins + jeheap.nsbins + jeheap.nqbins
else:
if jeheap.DWORD_SIZE == 4:
jeheap.nbins = 36
elif jeheap.DWORD_SIZE == 8:
jeheap.nbins = 35
# XXX: figure out how to calculate the chunk size correctly, this is
# firefox specific
jeheap.chunk_size = 1 << 20
def parse_options():
global jeheap
# thread magazine caches (disabled on firefox)
try:
opt_mag = dbg.get_value('opt_mag')
except:
opt_mag = 0
try:
opt_tcache = dbg.get_value('opt_tcache')
except:
opt_tcache = 0
try:
opt_lg_tcache_nslots = \
dbg.get_value('opt_lg_tcache_nslots')
except:
opt_lg_tcache_nslots = 0
if opt_mag != 0 or opt_tcache != 0 or opt_lg_tcache_nslots != 0:
jeheap.MAGAZINES = true
if jeheap.MAGAZINES == true:
try:
mag_rag_t_size = dbg.sizeof('mag_rack_t')
bin_mags_t_size = dbg.sizeof('bin_mags_t')
jeheap.magrack_size = \
mag_rag_t_size + (bin_mags_t_size * (jeheap.nbins - 1))
except:
# standalone variant
jeheap.STANDALONE = true
tcache_t_size = dbg.sizeof('tcache_t')
tcache_bin_t_size = dbg.sizeof('tcache_bin_t')
jemalloc.magrack_size = \
tcache_t_size + (tcache_bin_t_size * (jeheap.nbins - 1))
def parse_options():
global jeheap
# thread magazine caches (disabled on firefox)
try:
opt_mag = dbg.get_value('opt_mag')
except:
opt_mag = 0
try:
opt_tcache = dbg.get_value('opt_tcache')
except:
opt_tcache = 0
try:
opt_lg_tcache_nslots = \
dbg.get_value('opt_lg_tcache_nslots')
except:
opt_lg_tcache_nslots = 0
if opt_mag != 0 or opt_tcache != 0 or opt_lg_tcache_nslots != 0:
jeheap.MAGAZINES = true
if jeheap.MAGAZINES == true:
try:
mag_rag_t_size = dbg.sizeof('mag_rack_t')
bin_mags_t_size = dbg.sizeof('bin_mags_t')
jeheap.magrack_size = \
mag_rag_t_size + (bin_mags_t_size * (jeheap.nbins - 1))
except:
# standalone variant
jeheap.STANDALONE = true
tcache_t_size = dbg.sizeof('tcache_t')
tcache_bin_t_size = dbg.sizeof('tcache_bin_t')
jemalloc.magrack_size = \
tcache_t_size + (tcache_bin_t_size * (jeheap.nbins - 1))
