def asio_stacktrace(wh, limit=None):
"""Produce a list of async frames by following a WaitHandle's parent chain.
The stacktrace ends at the WaitHandle::join().
The whole chain is walked even if `limit' is provided---the return
stacktrace will have `limit' or fewer entries if there were `limit' or
fewer frames, and `limit' + 1 frames otherwise, where the last frame is the
WaitHandle::join().
"""
stacktrace = []
count = 0
for wh in WaitHandle(wh).chain():
resumable = wh.resumable()
if resumable is None:
continue
if limit is None or count < limit:
stacktrace.append(frame.create_resumable(count, resumable))
count += 1
ar = asio_context(wh['m_contextIdx'])['m_savedFP']
if ar != nullptr():
stacktrace.append(frame.create_php(idx=count, ar=ar))
return stacktrace
def asio_stacktrace(wh, limit=None):
"""Produce a list of async frames by following a WaitHandle's parent chain.
The stacktrace ends at the WaitHandle::join().
The whole chain is walked even if `limit' is provided---the return
stacktrace will have `limit' or fewer entries if there were `limit' or
fewer frames, and `limit' + 1 frames otherwise, where the last frame is the
WaitHandle::join().
"""
stacktrace = []
count = 0
for wh in WaitHandle(wh).chain():
resumable = wh.resumable()
if resumable is None:
continue
if limit is None or count < limit:
stacktrace.append(frame.create_resumable(count, resumable))
count += 1
ar = asio_context(wh['m_contextIdx'])['m_savedFP']
if ar != nullptr():
stacktrace.append(frame.create_php(idx=count, ar=ar))
return stacktrace
def invoke(self, args, from_tty):
argv = parse_argv(args)
if len(argv) > 2:
print('Usage: walkfp [fp] [rip]')
return
fp_type = T('uintptr_t').pointer()
try:
arch = gdb.newest_frame().architecture().name()
except:
arch = 'i386:x86-64'
frame_reg = '$x29' if arch == 'aarch64' else '$rbp'
pc_reg = '$pc' if arch == 'aarch64' else '$rip'
fp = (argv[0] if len(argv) >= 1 else
gdb.parse_and_eval(frame_reg)).cast(fp_type)
rip = (argv[1] if len(argv) == 2 else gdb.parse_and_eval(pc_reg)).cast(
T('uintptr_t'))
i = 0
fp = (fp, rip)
while fp:
rip = fp[1]
fp = fp[0].cast(fp_type)
try:
if frame.is_jitted(fp, rip):
ar_type = T('HPHP::ActRec').pointer()
print(
frame.stringify(
frame.create_php(idx=i,
ar=fp.cast(ar_type),
rip=rip)))
else:
print(
frame.stringify(
frame.create_native(idx=i,
fp=fp,
rip=rip,
name=_function_for(rip))))
except:
print(
frame.stringify(frame.create_native(idx=i, fp=fp,
rip=rip)))
i += 1
def invoke(self, args, from_tty):
argv = parse_argv(args)
if len(argv) > 2:
print('Usage: walkfp [fp] [rip]')
return
fp_type = T('uintptr_t').pointer()
fp = gdb.parse_and_eval('$rbp').cast(fp_type)
rip = gdb.parse_and_eval('$rip').cast(T('uintptr_t'))
if len(argv) >= 1:
fp = argv[0].cast(fp_type)
if len(argv) == 2:
rip = argv[1].cast(T('uintptr_t'))
i = 0
fp = (fp, rip)
while fp:
rip = fp[1]
fp = fp[0].cast(fp_type)
try:
if frame.is_jitted(fp, rip):
ar_type = T('HPHP::ActRec').pointer()
print(
frame.stringify(
frame.create_php(idx=i,
ar=fp.cast(ar_type),
rip=rip)))
else:
print(
frame.stringify(
frame.create_native(idx=i,
fp=fp,
rip=rip,
name=_function_for(rip))))
except:
print(
frame.stringify(frame.create_native(idx=i, fp=fp,
rip=rip)))
i += 1
def invoke(self, args, from_tty):
argv = parse_argv(args)
if len(argv) > 2:
print('Usage: walkfp [fp] [rip]')
return
fp_type = T('uintptr_t').pointer()
try:
arch = gdb.newest_frame().architecture().name()
except:
arch = 'i386:x86-64'
frame_reg = '$x29' if arch == 'aarch64' else '$rbp'
pc_reg = '$pc' if arch == 'aarch64' else '$rip'
fp = (argv[0] if len(argv) >= 1 else
gdb.parse_and_eval(frame_reg)).cast(fp_type)
rip = (argv[1] if len(argv) == 2 else
gdb.parse_and_eval(pc_reg)).cast(T('uintptr_t'))
i = 0
fp = (fp, rip)
while fp:
rip = fp[1]
fp = fp[0].cast(fp_type)
try:
if frame.is_jitted(fp, rip):
ar_type = T('HPHP::ActRec').pointer()
print(frame.stringify(frame.create_php(
idx=i, ar=fp.cast(ar_type), rip=rip)))
else:
print(frame.stringify(frame.create_native(
idx=i, fp=fp, rip=rip, name=_function_for(rip))))
except:
print(frame.stringify(frame.create_native(idx=i, fp=fp, rip=rip)))
i += 1
def invoke(self, args, from_tty):
argv = parse_argv(args)
if len(argv) > 2:
print('Usage: walkfp [fp] [rip]')
return
fp_type = T('uintptr_t').pointer()
fp = gdb.parse_and_eval('$rbp').cast(fp_type)
rip = gdb.parse_and_eval('$rip').cast(T('uintptr_t'))
if len(argv) >= 1:
fp = argv[0].cast(fp_type)
if len(argv) == 2:
rip = argv[1].cast(T('uintptr_t'))
i = 0
fp = (fp, rip)
while fp:
rip = fp[1]
fp = fp[0].cast(fp_type)
try:
if frame.is_jitted(fp, rip):
ar_type = T('HPHP::ActRec').pointer()
print(frame.stringify(frame.create_php(
idx=i, ar=fp.cast(ar_type), rip=rip)))
else:
print(frame.stringify(frame.create_native(
idx=i, fp=fp, rip=rip, name=_function_for(rip))))
except:
print(frame.stringify(frame.create_native(idx=i, fp=fp, rip=rip)))
i += 1
def invoke(self, args, from_tty):
argv = parse_argv(args)
if len(argv) > 1:
print('Usage: walkstk [fp]')
return
# Set fp = $rbp.
fp_type = T('uintptr_t').pointer()
fp = gdb.parse_and_eval('$rbp').cast(fp_type)
if len(argv) == 1:
fp = argv[0].cast(fp_type)[0]
# Set rip = $rip.
rip_type = T('uintptr_t')
rip = gdb.parse_and_eval('$rip').cast(rip_type)
if len(argv) == 1:
rip = argv[0].cast(fp_type)[1]
# Find the starting native frame.
native_frame = gdb.newest_frame()
while (native_frame is not None and rip != native_frame.pc()):
native_frame = native_frame.older()
if native_frame is None:
if len(argv) == 0:
print('walkstk: Unknown error: corrupt stack?')
else:
print('walkstk: Invalid frame pointer')
return
# Get the address and value of `mcg', the global MCGenerator pointer.
# For some reason, gdb doesn't have debug info about the symbol, so we
# can't use V(); probably this is because we declare it extern "C" (and
# maybe also because we do so in a namespace).
mcg_type = T('HPHP::jit::MCGenerator').pointer()
mcg_addr = gdb.parse_and_eval('&::mcg').cast(mcg_type.pointer())
mcg = mcg_addr.dereference()
# Set the bounds of the TC.
try:
tc_base = mcg['code']['m_base']
tc_end = tc_base + mcg['code']['m_codeSize']
except:
# We can't access `mcg' for whatever reason. Assume that the TC is
# above the data section, but restricted to low memory.
tc_base = mcg_addr.cast(T('uintptr_t'))
tc_end = 0x100000000
i = 0
# Make a fake frame for our `fp' and `rip'. This lets us pop a frame
# at the top of the loop, which makes it easier to include the final
# frame.
fp = (fp, rip)
while fp:
rip = fp[1]
fp = fp[0].cast(fp_type)
in_tc = rip >= tc_base and rip < tc_end
# Try to get the PHP function name from the ActRec at %fp if we're
# executing in the TC.
if in_tc:
ar_type = T('HPHP::ActRec').pointer()
try:
print(
frame.stringify(
frame.create_php(idx=i + 1,
ar=fp.cast(ar_type),
rip=rip)))
except gdb.MemoryError:
print(
frame.stringify(
frame.create_native(idx=i + 1,
fp=fp,
rip=rip,
native_frame=native_frame)))
# Pop native frames until we hit our caller's rip.
else:
frames = []
while (native_frame is not None
and fp[1] != native_frame.pc()):
frames.append(
frame.create_native(idx=i,
fp='{inline frame}',
rip=rip,
native_frame=native_frame))
i += 1
native_frame = native_frame.older()
if frames:
# Associate the frame pointer with the un-inlined frame.
frames[-1]['fp'] = str(fp)
for f in frames:
print(frame.stringify(f))
def invoke(self, args, from_tty):
argv = parse_argv(args)
if len(argv) > 1:
print('Usage: walkstk [fp]')
return
# Bail early if the custom unwinder has not been set up.
if not unwind.try_unwinder_init():
print('walkstk: Could not initialize the HHVM unwinder.')
# Find the starting native frame.
native_frame = gdb.newest_frame()
if native_frame is None:
print('walkstk: Cannot find any frames: corrupt stack?')
return
# Set fp = $rbp, rip = $rip.
fp_type = T('uintptr_t').pointer()
fp = native_frame.read_register('rbp').cast(fp_type)
rip = native_frame.pc()
if len(argv) == 1:
# Start walking the stack from the user-provided `fp'.
fp = argv[0].cast(fp_type)[0]
rip = argv[0].cast(fp_type)[1]
# Try to find a corresponding native frame.
while (native_frame is not None and rip != native_frame.pc()):
native_frame = native_frame.older()
i = 0
# Make a fake frame for our `fp' and `rip'. This lets us pop a frame
# at the top of the loop, which makes it easier to include the final
# frame.
fp = (fp, rip)
while fp:
rip = fp[1]
fp = fp[0].cast(fp_type)
# Try to get the PHP function name from the ActRec at `fp' if we're
# executing in the TC.
if frame.is_jitted(fp, rip):
ar_type = T('HPHP::ActRec').pointer()
try:
print(
frame.stringify(
frame.create_php(idx=i,
ar=fp.cast(ar_type),
rip=rip)))
except gdb.MemoryError:
print(
frame.stringify(
frame.create_native(idx=i,
fp=fp,
rip=rip,
native_frame=native_frame)))
if native_frame is not None:
native_frame = native_frame.older()
i += 1
else:
if native_frame is None:
# If we couldn't find a native frame, then `walkstk' was
# invoked with a non-native `fp' argument. Now that we
# don't seem to be in the TC, try to find the corresponding
# native frame.
native_frame = gdb.newest_frame()
while (native_frame is not None
and rip != native_frame.pc()):
native_frame = native_frame.older()
if native_frame is not None:
# Pop native frames until we hit our caller's rip.
frames = []
while (native_frame is not None
and (fp == 0x0 or fp[1] != native_frame.pc())):
frames.append(
frame.create_native(idx=i,
fp='{inline frame}',
rip=native_frame.pc(),
native_frame=native_frame))
native_frame = native_frame.older()
i += 1
if frames:
# Associate the frame pointer with the un-inlined frame.
frames[-1]['fp'] = str(fp)
for f in frames:
print(frame.stringify(f))
else:
# We only hit this case if gdb undercounted the TC's
# frames---which shouldn't happen unless the custom
# unwinder (or gdb's unwinder API) is malfunctioning.
#
# Just guess that the name of the frame is the same as the
# name of the block we're in.
try:
block = gdb.block_for_pc(int(rip))
name = block.function.name
print(
frame.stringify(
frame.create_native(idx=i,
fp=fp,
rip=rip,
name='? ' + name)))
except:
print(
frame.stringify(
frame.create_native(idx=i,
fp=fp,
rip=rip,
native_frame=None)))
i += 1
def invoke(self, args, from_tty):
argv = parse_argv(args)
if len(argv) > 2:
print('Usage: walkstk [sp] [rip]')
return
# Set sp = $rbp.
sp_type = T('uintptr_t').pointer()
sp = gdb.parse_and_eval('$rbp').cast(sp_type)
if len(argv) >= 1:
sp = argv[0].cast(sp_type)
# Set rip = $rip.
rip_type = T('uintptr_t')
rip = gdb.parse_and_eval('$rip').cast(rip_type)
if len(argv) == 2:
rip = argv[1].cast(rip_type)
try:
mcg = V('HPHP::jit::mcg')
tc_base = mcg['code']['m_base']
tc_end = tc_base + mcg['code']['m_codeSize']
except:
mcg = None
i = 0
native_frame = gdb.newest_frame()
skip_tc = False # Only used when we can't find HPHP::mcg.
# Munge `sp' so that it looks like the stack pointer that would point
# to it if we had another frame---this lets us promote the "increment"
# to the beginning of the loop, so that we don't miss the final frame.
sp = (sp, rip)
while sp:
rip = sp[1]
sp = sp[0].cast(sp_type)
if mcg is not None:
in_tc = rip >= tc_base and rip < tc_end
elif not skip_tc:
# TC frames look like unnamed normal native frames.
try:
next_frame = native_frame.older()
in_tc = (next_frame is not None
and next_frame.name() is None
and next_frame.type() == gdb.NORMAL_FRAME)
except AttributeError:
# No older frame.
in_tc = False
else:
in_tc = False
skip_tc = False
# Try to get the PHP function name from the ActRec at %sp if we're
# executing in the TC.
if in_tc:
ar_type = T('HPHP::ActRec').pointer()
try:
print(
frame.stringify(
frame.create_php(idx=i + 1,
ar=sp.cast(ar_type),
rip=rip)))
except gdb.MemoryError:
if mcg is None:
# We guessed wrong about whether we're in the TC.
skip_tc = True
print(
frame.stringify(
frame.create_native(idx=i + 1, sp=sp, rip=rip)))
# Pop native frames until we find our current %sp.
else:
inlines = 0
while (native_frame is not None and rip != native_frame.pc()):
if inlines > 0 and native_frame.name() is not None:
print(
frame.stringify(
frame.create_native(
idx=i,
sp='{inline frame}',
rip=rip,
native_frame=native_frame)))
i += 1
inlines += 1
native_frame = native_frame.older()
print(
frame.stringify(
frame.create_native(idx=i,
sp=sp,
rip=rip,
native_frame=native_frame)))
def invoke(self, args, from_tty):
argv = parse_argv(args)
if len(argv) > 1:
print('Usage: walkstk [fp]')
return
# Bail early if the custom unwinder has not been set up.
if not unwind.try_unwinder_init():
print('walkstk: Could not initialize the HHVM unwinder.')
# Find the starting native frame.
native_frame = gdb.newest_frame()
if native_frame is None:
print('walkstk: Cannot find any frames: corrupt stack?')
return
# Set fp = $rbp, rip = $rip.
fp_type = T('uintptr_t').pointer()
fp = native_frame.read_register('rbp').cast(fp_type)
rip = native_frame.pc()
if len(argv) == 1:
# Start walking the stack from the user-provided `fp'.
fp = argv[0].cast(fp_type)[0]
rip = argv[0].cast(fp_type)[1]
# Try to find a corresponding native frame.
while (native_frame is not None
and rip != native_frame.pc()):
native_frame = native_frame.older()
i = 0
# Make a fake frame for our `fp' and `rip'. This lets us pop a frame
# at the top of the loop, which makes it easier to include the final
# frame.
fp = (fp, rip)
while fp:
rip = fp[1]
fp = fp[0].cast(fp_type)
# Try to get the PHP function name from the ActRec at `fp' if we're
# executing in the TC.
if frame.is_jitted(fp, rip):
ar_type = T('HPHP::ActRec').pointer()
try:
print(frame.stringify(frame.create_php(
idx=i, ar=fp.cast(ar_type), rip=rip)))
except gdb.MemoryError:
print(frame.stringify(frame.create_native(
idx=i, fp=fp, rip=rip, native_frame=native_frame)))
if native_frame is not None:
native_frame = native_frame.older()
i += 1
else:
if native_frame is None:
# If we couldn't find a native frame, then `walkstk' was
# invoked with a non-native `fp' argument. Now that we
# don't seem to be in the TC, try to find the corresponding
# native frame.
native_frame = gdb.newest_frame()
while (native_frame is not None
and rip != native_frame.pc()):
native_frame = native_frame.older()
if native_frame is not None:
# Pop native frames until we hit our caller's rip.
frames = []
while (native_frame is not None
and (fp == 0x0 or fp[1] != native_frame.pc())):
frames.append(frame.create_native(
idx=i,
fp='{inline frame}',
rip=native_frame.pc(),
native_frame=native_frame))
native_frame = native_frame.older()
i += 1
if frames:
# Associate the frame pointer with the un-inlined frame.
frames[-1]['fp'] = str(fp)
for f in frames:
print(frame.stringify(f))
else:
# We only hit this case if gdb undercounted the TC's
# frames---which shouldn't happen unless the custom
# unwinder (or gdb's unwinder API) is malfunctioning.
#
# Just guess that the name of the frame is the same as the
# name of the block we're in.
try:
print(frame.stringify(frame.create_native(
idx=i, fp=fp, rip=rip, name=_function_for(rip))))
except:
print(frame.stringify(frame.create_native(
idx=i, fp=fp, rip=rip, native_frame=None)))
i += 1
def invoke(self, args, from_tty):
argv = parse_argv(args)
if len(argv) > 2:
print('Usage: walkstk [sp] [rip]')
# Set sp = $rbp.
sp_type = T('uintptr_t').pointer()
sp = gdb.parse_and_eval('$rbp').cast(sp_type)
if len(argv) >= 1:
sp = argv[0].cast(sp_type)
# Set rip = $rip.
rip_type = T('uintptr_t')
rip = gdb.parse_and_eval('$rip').cast(rip_type)
if len(argv) == 2:
rip = argv[1].cast(rip_type)
try:
mcg = V('HPHP::jit::mcg')
tc_base = mcg['code']['m_base']
tc_end = tc_base + mcg['code']['m_codeSize']
except:
mcg = None
i = 0
native_frame = gdb.newest_frame()
skip_tc = False # Only used when we can't find HPHP::mcg.
# Munge `sp' so that it looks like the stack pointer that would point
# to it if we had another frame---this lets us promote the "increment"
# to the beginning of the loop, so that we don't miss the final frame.
sp = (sp, rip)
while sp:
rip = sp[1]
sp = sp[0].cast(sp_type)
if mcg is not None:
in_tc = rip >= tc_base and rip < tc_end
elif not skip_tc:
# TC frames look like unnamed normal native frames.
try:
next_frame = native_frame.older()
in_tc = (next_frame is not None and
next_frame.name() is None and
next_frame.type() == gdb.NORMAL_FRAME)
except AttributeError:
# No older frame.
in_tc = False
else:
in_tc = False
skip_tc = False
# Try to get the PHP function name from the ActRec at %sp if we're
# executing in the TC.
if in_tc:
ar_type = T('HPHP::ActRec').pointer()
try:
print(frame.stringify(frame.create_php(
idx=i + 1, ar=sp.cast(ar_type), rip=rip)))
except gdb.MemoryError:
if mcg is None:
# We guessed wrong about whether we're in the TC.
skip_tc = True
print(frame.stringify(frame.create_native(
idx=i + 1, sp=sp, rip=rip)))
# Pop native frames until we find our current %sp.
else:
inlines = 0
while (native_frame is not None
and rip != native_frame.pc()):
if inlines > 0 and native_frame.name() is not None:
print(frame.stringify(frame.create_native(
idx=i,
sp='{inline frame}',
rip=rip,
native_frame=native_frame)))
i += 1
inlines += 1
native_frame = native_frame.older()
print(frame.stringify(frame.create_native(
idx=i, sp=sp, rip=rip, native_frame=native_frame)))
def invoke(self, args, from_tty):
argv = parse_argv(args)
if len(argv) > 1:
print('Usage: walkstk [fp]')
return
# Set fp = $rbp.
fp_type = T('uintptr_t').pointer()
fp = gdb.parse_and_eval('$rbp').cast(fp_type)
if len(argv) == 1:
fp = argv[0].cast(fp_type)[0]
# Set rip = $rip.
rip_type = T('uintptr_t')
rip = gdb.parse_and_eval('$rip').cast(rip_type)
if len(argv) == 1:
rip = argv[0].cast(fp_type)[1]
# Find the starting native frame.
native_frame = gdb.newest_frame()
while (native_frame is not None
and rip != native_frame.pc()):
native_frame = native_frame.older()
if native_frame is None:
if len(argv) == 0:
print('walkstk: Unknown error: corrupt stack?')
else:
print('walkstk: Invalid frame pointer')
return
# Get the address and value of `mcg', the global MCGenerator pointer.
# For some reason, gdb doesn't have debug info about the symbol, so we
# can't use V(); probably this is because we declare it extern "C" (and
# maybe also because we do so in a namespace).
mcg_type = T('HPHP::jit::MCGenerator').pointer()
mcg_addr = gdb.parse_and_eval('&::mcg').cast(mcg_type.pointer())
mcg = mcg_addr.dereference()
# Set the bounds of the TC.
try:
tc_base = mcg['code']['m_base']
tc_end = tc_base + mcg['code']['m_codeSize']
except:
# We can't access `mcg' for whatever reason. Assume that the TC is
# above the data section, but restricted to low memory.
tc_base = mcg_addr.cast(T('uintptr_t'))
tc_end = 0x100000000
i = 0
# Make a fake frame for our `fp' and `rip'. This lets us pop a frame
# at the top of the loop, which makes it easier to include the final
# frame.
fp = (fp, rip)
while fp:
rip = fp[1]
fp = fp[0].cast(fp_type)
in_tc = rip >= tc_base and rip < tc_end
# Try to get the PHP function name from the ActRec at %fp if we're
# executing in the TC.
if in_tc:
ar_type = T('HPHP::ActRec').pointer()
try:
print(frame.stringify(frame.create_php(
idx=i + 1, ar=fp.cast(ar_type), rip=rip)))
except gdb.MemoryError:
print(frame.stringify(frame.create_native(
idx=i + 1, fp=fp, rip=rip, native_frame=native_frame)))
# Pop native frames until we hit our caller's rip.
else:
frames = []
while (native_frame is not None
and fp[1] != native_frame.pc()):
frames.append(frame.create_native(
idx=i,
fp='{inline frame}',
rip=rip,
native_frame=native_frame))
i += 1
native_frame = native_frame.older()
if frames:
# Associate the frame pointer with the un-inlined frame.
frames[-1]['fp'] = str(fp)
for f in frames:
print(frame.stringify(f))