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Debugger: Speed up reading of 0 terminated blobs in dumpers

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Change-Id: Iebc64c21f4dd6f4876989e57d3a347b96e1bd449
Reviewed-by: Christian Stenger <christian.stenger@digia.com>
This commit is contained in:
hjk
2014-10-10 01:33:35 +02:00
parent 86ca234004
commit 392b3f65d2
1 changed files with 22 additions and 22 deletions
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42
share/qtcreator/debugger/dumper.py
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@@ -696,19 +696,21 @@ class DumperBase:
self.check(count >= minimum)
self.check(count < 1000000)
def findFirstZero(self, p, maximum):
for i in xrange(maximum):
if int(p.dereference()) == 0:
return 0, i
p = p + 1
# Real end is unknown.
return -1, maximum
def readToFirstZero(self, p, tsize, maximum):
code = (None, "b", "H", None, "I")[tsize]
base = toInteger(p)
blob = self.extractBlob(base, maximum).toBytes()
for i in xrange(0, maximum / tsize):
t = struct.unpack_from(code, blob, i)[0]
if t == 0:
return 0, i, self.hexencode(blob[:i])
def encodeCArray(self, p, innerType, limit):
t = self.lookupType(innerType)
p = p.cast(t.pointer())
elided, shown = self.findFirstZero(p, limit)
return elided, self.readMemory(p, shown * t.sizeof)
# Real end is unknown.
return -1, maximum, self.hexencode(blob[:maximum])
def encodeCArray(self, p, tsize, limit):
elided, shown, blob = self.readToFirstZero(p, tsize, limit)
return elided, blob
def putItemCount(self, count, maximum = 1000000000):
# This needs to override the default value, so don't use 'put' directly.
@@ -851,10 +853,8 @@ class DumperBase:
return True
def putSimpleCharArray(self, base, size = None):
t = self.lookupType("char")
p = base.cast(t.pointer())
if size is None:
elided, shown = self.findFirstZero(p, self.displayStringLimit)
elided, shown, data = self.readToFirstZero(base, 1, self.displayStringLimit)
else:
elided, shown = self.computeLimit(int(size), self.displayStringLimit)
data = self.readMemory(p, shown)
@@ -903,7 +903,7 @@ class DumperBase:
if format == None and innerTypeName == "char":
# Use Latin1 as default for char *.
self.putType(typeName)
(elided, data) = self.encodeCArray(value, "unsigned char", self.displayStringLimit)
(elided, data) = self.encodeCArray(value, 1, self.displayStringLimit)
self.putValue(data, Hex2EncodedLatin1, elided=elided)
self.putNumChild(0)
return
@@ -923,7 +923,7 @@ class DumperBase:
# Explicitly requested Latin1 formatting.
limit = self.displayStringLimit if format == Latin1StringFormat else 1000000
self.putType(typeName)
(elided, data) = self.encodeCArray(value, "unsigned char", limit)
(elided, data) = self.encodeCArray(value, 1, limit)
self.putValue(data, Hex2EncodedLatin1, elided=elided)
self.putNumChild(0)
self.putDisplay((StopDisplay if format == Latin1StringFormat else DisplayLatin1String), data)
@@ -933,7 +933,7 @@ class DumperBase:
# Explicitly requested UTF-8 formatting.
limit = self.displayStringLimit if format == Utf8StringFormat else 1000000
self.putType(typeName)
(elided, data) = self.encodeCArray(value, "unsigned char", limit)
(elided, data) = self.encodeCArray(value, 1, limit)
self.putValue(data, Hex2EncodedUtf8, elided=elided)
self.putNumChild(0)
self.putDisplay((StopDisplay if format == Utf8StringFormat else DisplayUtf8String), data)
@@ -942,7 +942,7 @@ class DumperBase:
if format == Local8BitStringFormat:
# Explicitly requested local 8 bit formatting.
self.putType(typeName)
(elided, data) = self.encodeCArray(value, "unsigned char", self.displayStringLimit)
(elided, data) = self.encodeCArray(value, 1, self.displayStringLimit)
self.putValue(data, Hex2EncodedLocal8Bit, elided=elided)
self.putNumChild(0)
return
@@ -950,7 +950,7 @@ class DumperBase:
if format == Utf16StringFormat:
# Explicitly requested UTF-16 formatting.
self.putType(typeName)
(elided, data) = self.encodeCArray(value, "unsigned short", self.displayStringLimit)
(elided, data) = self.encodeCArray(value, 2, self.displayStringLimit)
self.putValue(data, Hex4EncodedLittleEndian, elided=elided)
self.putNumChild(0)
return
@@ -958,7 +958,7 @@ class DumperBase:
if format == Ucs4StringFormat:
# Explicitly requested UCS-4 formatting.
self.putType(typeName)
(elided, data) = self.encodeCArray(value, "unsigned int", self.displayStringLimit)
(elided, data) = self.encodeCArray(value, 4, self.displayStringLimit)
self.putValue(data, Hex8EncodedLittleEndian, elided=elided)
self.putNumChild(0)
return