FreeChainXenon/binutils-gdb
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Make gdb.selected_thread().inferior return a new reference

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thpy_get_inferior function should return a new reference to the
existing inferior object, and therefore should increment its refcount.

Fixed bug looks like this.
If multiple time call gdb.selected_thread ().inferior, gdb throws exception:

(gdb) pi gdb.selected_thread().inferior
<gdb.Inferior object at 0x7f1952bea698>
(gdb) pi gdb.selected_thread().inferior
Python Exception <type 'exceptions.AttributeError'> 'NoneType' object
has no attribute 'inferior':
Error while executing Python code.
(gdb) info threads
  Id   Target Id         Frame
* 1    Thread 0x7f54f0474740 (LWP 584) "mc" 0x00007f54ef055c33 in
This commit is contained in:
Maksim Dzabraev 2017-10-29 01:14:34 +07:00 • committed by Simon Marchi
parent d91f0b20e5
commit 484d8d361d
4 changed files with 22 additions and 0 deletions
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9
gdb/testsuite/gdb.python/py-infthread.exp
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@ -51,6 +51,15 @@ gdb_test "python print(seen_a_thread)" "True"
# Test basic gdb.Inferior attributes and methods.
# Make sure that InferiorThread.inferior returns a new reference (see PR 21213).
gdb_py_test_silent_cmd "python gdb.selected_thread ().inferior" "test InferiorThread.inferior 1" 1
gdb_py_test_silent_cmd "python gdb.selected_thread ().inferior" "test InferiorThread.inferior 2" 1
gdb_test_no_output "python import gc; gc.collect()" "call Python garbage collection"
gdb_py_test_silent_cmd "python gdb.selected_thread ().inferior" "test InferiorThread.inferior 3" 1
gdb_py_test_silent_cmd "python gdb.selected_thread ().inferior" "test InferiorThread.inferior 4" 1
gdb_py_test_silent_cmd "python t0 = gdb.selected_thread ()" "test gdb.selected_thread" 1
gdb_test "python print (t0)" "\\<gdb.InferiorThread object at 0x\[\[:xdigit:\]\]+>" "verify InferiorThread object"
gdb_test "python print ('result = %s' % t0.num)" " = 1" "test InferiorThread.num"