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Issue #8559: improve unicode support of (gdb) libpython.py

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* Escape non printable characters (use locale.getpreferredencoding())
 * Fix support of surrogate pairs
 * test_gdb.py: use ascii() instead of repr() in gdb program arguments to avoid
   encoding issues
 * Fix test_strings() of test_gdb.py for encoding different than UTF-8
   (eg. ACSII)
This commit is contained in:
Victor Stinner 2010-05-19 23:04:56 +00:00
parent 06710a8421
commit 150016fd24
2 changed files with 61 additions and 39 deletions
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25
Lib/test/test_gdb.py
View file

@ -8,6 +8,7 @@
import subprocess
import sys
import unittest
import locale
from test.support import run_unittest, findfile
@ -177,7 +178,7 @@ def test_getting_backtrace(self):
def assertGdbRepr(self, val, exp_repr=None, cmds_after_breakpoint=None):
# Ensure that gdb's rendering of the value in a debugged process
# matches repr(value) in this process:
gdb_repr, gdb_output = self.get_gdb_repr('id(' + repr(val) + ')',
gdb_repr, gdb_output = self.get_gdb_repr('id(' + ascii(val) + ')',
cmds_after_breakpoint)
if not exp_repr:
exp_repr = repr(val)
@ -226,31 +227,35 @@ def test_bytes(self):
def test_strings(self):
'Verify the pretty-printing of unicode strings'
encoding = locale.getpreferredencoding()
def check_repr(text):
try:
text.encode(encoding)
printable = True
except UnicodeEncodeError:
self.assertGdbRepr(text, ascii(text))
else:
self.assertGdbRepr(text)
self.assertGdbRepr('')
self.assertGdbRepr('And now for something hopefully the same')
self.assertGdbRepr('string with embedded NUL here \0 and then some more text')
# Test printing a single character:
# U+2620 SKULL AND CROSSBONES
self.assertGdbRepr('\u2620')
check_repr('\u2620')
# Test printing a Japanese unicode string
# (I believe this reads "mojibake", using 3 characters from the CJK
# Unified Ideographs area, followed by U+3051 HIRAGANA LETTER KE)
self.assertGdbRepr('\u6587\u5b57\u5316\u3051')
check_repr('\u6587\u5b57\u5316\u3051')
# Test a character outside the BMP:
# U+1D121 MUSICAL SYMBOL C CLEF
# This is:
# UTF-8: 0xF0 0x9D 0x84 0xA1
# UTF-16: 0xD834 0xDD21
if sys.maxunicode == 0x10FFFF:
# wide unicode:
self.assertGdbRepr(chr(0x1D121))
else:
# narrow unicode:
self.assertGdbRepr(chr(0x1D121),
"'\\U0000d834\\U0000dd21'")
check_repr(chr(0x1D121))
def test_tuples(self):
'Verify the pretty-printing of tuples'

75
Tools/gdb/libpython.py
View file

@ -42,6 +42,7 @@
'''
from __future__ import with_statement
import gdb
import locale
# Look up the gdb.Type for some standard types:
_type_char_ptr = gdb.lookup_type('char').pointer() # char*
@ -69,6 +70,7 @@
hexdigits = "0123456789abcdef"
ENCODING = locale.getpreferredencoding()
class NullPyObjectPtr(RuntimeError):
pass
@ -1128,53 +1130,68 @@ def write_repr(self, out, visited):
# Non-ASCII characters
else:
ucs = ch;
if self.char_width == 2:
ch2 = 0
ucs = ch
orig_ucs = None
if self.char_width() == 2:
# Get code point from surrogate pair
if i < len(proxy):
if (i < len(proxy)
and 0xD800 <= ord(ch) < 0xDC00 \
and 0xDC00 <= ord(proxy[i]) <= 0xDFFF):
ch2 = proxy[i]
if (ord(ch) >= 0xD800 and ord(ch) < 0xDC00
and ord(ch2) >= 0xDC00 and ord(ch2) <= 0xDFFF):
ucs = (((ch & 0x03FF) << 10) | (ch2 & 0x03FF)) + 0x00010000;
i += 1
code = (ord(ch) & 0x03FF) << 10
code |= ord(ch2) & 0x03FF
code += 0x00010000
orig_ucs = ucs
ucs = unichr(code)
i += 1
else:
ch2 = None
printable = _unichr_is_printable(ucs)
if printable:
try:
ucs.encode(ENCODING)
except UnicodeEncodeError:
printable = False
if orig_ucs is not None:
ucs = orig_ucs
i -= 1
# Map Unicode whitespace and control characters
# (categories Z* and C* except ASCII space)
if not _unichr_is_printable(ucs):
if not printable:
# Unfortuately, Python 2's unicode type doesn't seem
# to expose the "isprintable" method
code = ord(ucs)
# Map 8-bit characters to '\\xhh'
if ucs <= 0xff:
if code <= 0xff:
out.write('\\x')
out.write(hexdigits[(ord(ucs) >> 4) & 0x000F])
out.write(hexdigits[ord(ucs) & 0x000F])
out.write(hexdigits[(code >> 4) & 0x000F])
out.write(hexdigits[code & 0x000F])
# Map 21-bit characters to '\U00xxxxxx'
elif ucs >= 0x10000:
elif code >= 0x10000:
out.write('\\U')
out.write(hexdigits[(ord(ucs) >> 28) & 0x0000000F])
out.write(hexdigits[(ord(ucs) >> 24) & 0x0000000F])
out.write(hexdigits[(ord(ucs) >> 20) & 0x0000000F])
out.write(hexdigits[(ord(ucs) >> 16) & 0x0000000F])
out.write(hexdigits[(ord(ucs) >> 12) & 0x0000000F])
out.write(hexdigits[(ord(ucs) >> 8) & 0x0000000F])
out.write(hexdigits[(ord(ucs) >> 4) & 0x0000000F])
out.write(hexdigits[ord(ucs) & 0x0000000F])
out.write(hexdigits[(code >> 28) & 0x0000000F])
out.write(hexdigits[(code >> 24) & 0x0000000F])
out.write(hexdigits[(code >> 20) & 0x0000000F])
out.write(hexdigits[(code >> 16) & 0x0000000F])
out.write(hexdigits[(code >> 12) & 0x0000000F])
out.write(hexdigits[(code >> 8) & 0x0000000F])
out.write(hexdigits[(code >> 4) & 0x0000000F])
out.write(hexdigits[code & 0x0000000F])
# Map 16-bit characters to '\uxxxx'
else:
out.write('\\u')
out.write(hexdigits[(ord(ucs) >> 12) & 0x000F])
out.write(hexdigits[(ord(ucs) >> 8) & 0x000F])
out.write(hexdigits[(ord(ucs) >> 4) & 0x000F])
out.write(hexdigits[ord(ucs) & 0x000F])
out.write(hexdigits[(code >> 12) & 0x000F])
out.write(hexdigits[(code >> 8) & 0x000F])
out.write(hexdigits[(code >> 4) & 0x000F])
out.write(hexdigits[code & 0x000F])
else:
# Copy characters as-is
out.write(ch)
if self.char_width == 2:
if ord(ucs) >= 0x10000:
out.write(ch2)
if self.char_width() == 2 and (ch2 is not None):
out.write(ch2)
out.write(quote)