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http://sourceware.org/ml/gdb-patches/2010-01/msg00030.html
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Subject: [patch] Re: Regression: field type preservation: 7.0 -> 7.0.1+HEAD
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On Friday 01 January 2010 21:45:05 Jan Kratochvil wrote:
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> -PASS: gdb.mi/mi-var-child.exp: get children of struct_declarations.s2.u2.u1s1
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> +FAIL: gdb.mi/mi-var-child.exp: get children of struct_declarations.s2.u2.u1s1
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> -PASS: gdb.mi/mi2-var-child.exp: get children of struct_declarations.s2.u2.u1s1
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> +FAIL: gdb.mi/mi2-var-child.exp: get children of struct_declarations.s2.u2.u1s1
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> -PASS: gdb.python/py-mi.exp: examine container children=0, no pretty-printing
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> +FAIL: gdb.python/py-mi.exp: examine container children=0, no pretty-printing
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>
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> due to:
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> Re: RFA: unbreak typedefed bitfield
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> http://sourceware.org/ml/gdb-patches/2009-12/msg00295.html
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> commit fc85da4ee2a7c32afc53b1b334a4f84e2e9bd84e
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> http://sourceware.org/ml/gdb-cvs/2009-12/msg00100.html
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attached a fix on top of existing HEAD.
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Original PR gdb/10884 was a regression 6.8 -> 7.0 due to:
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RFC: Lazy bitfields
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http://sourceware.org/ml/gdb-patches/2009-07/msg00437.html
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http://sourceware.org/ml/gdb-cvs/2009-07/msg00143.html
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07491b3409f6ace0b7a9a707775a56ce10fece1c
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d7bd836 |
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No regressions for HEAD on {x86_64,x86_64-m32,i686}-fedora12-linux-gnu. Plus:
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-FAIL: gdb.mi/mi-var-child.exp: get children of struct_declarations.s2.u2.u1s1
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+PASS: gdb.mi/mi-var-child.exp: get children of struct_declarations.s2.u2.u1s1
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-FAIL: gdb.mi/mi2-var-child.exp: get children of struct_declarations.s2.u2.u1s1
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+PASS: gdb.mi/mi2-var-child.exp: get children of struct_declarations.s2.u2.u1s1
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-FAIL: gdb.python/py-mi.exp: examine container children=0, no pretty-printing
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+PASS: gdb.python/py-mi.exp: examine container children=0, no pretty-printing
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Going to check it in also for gdb_7_0-branch after an approval.
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Thanks,
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Jan
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gdb/
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2010-01-02 Jan Kratochvil <jan.kratochvil@redhat.com>
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* value.c (value_primitive_field): Remove one check_typedef call.
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Move bitpos and container_bitsize initialization after
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allocate_value_lazy. New comment before accessing TYPE_LENGTH.
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gdb/testsuite/
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2010-01-02 Jan Kratochvil <jan.kratochvil@redhat.com>
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* gdb.mi/var-cmd.c (do_bitfield_tests): Change "V.sharable" type to
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"uint_for_mi_testing".
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--- a/gdb/testsuite/gdb.mi/var-cmd.c
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+++ b/gdb/testsuite/gdb.mi/var-cmd.c
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@@ -494,7 +494,7 @@ void do_bitfield_tests ()
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mi_create_varobj V d "create varobj for Data"
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mi_list_varobj_children "V" {
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{"V.alloc" "alloc" "0" "int"}
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- {"V.sharable" "sharable" "0" "unsigned int"}
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+ {"V.sharable" "sharable" "0" "uint_for_mi_testing"}
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} "list children of Data"
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mi_check_varobj_value V.sharable 3 "access bitfield"
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:*/
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--- a/gdb/value.c
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+++ b/gdb/value.c
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@@ -1873,7 +1873,6 @@ value_primitive_field (struct value *arg1, int offset,
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CHECK_TYPEDEF (arg_type);
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type = TYPE_FIELD_TYPE (arg_type, fieldno);
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- type = check_typedef (type);
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/* Handle packed fields */
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@@ -1885,10 +1884,14 @@ value_primitive_field (struct value *arg1, int offset,
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Otherwise, adjust offset to the byte containing the first
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bit. Assume that the address, offset, and embedded offset
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are sufficiently aligned. */
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- int bitpos = TYPE_FIELD_BITPOS (arg_type, fieldno);
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- int container_bitsize = TYPE_LENGTH (type) * 8;
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+ int bitpos, container_bitsize;
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v = allocate_value_lazy (type);
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+
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+ /* TYPE_LENGTH of TYPE gets initialized by allocate_value_lazy. */
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+ bitpos = TYPE_FIELD_BITPOS (arg_type, fieldno);
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+ container_bitsize = TYPE_LENGTH (type) * 8;
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+
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v->bitsize = TYPE_FIELD_BITSIZE (arg_type, fieldno);
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if ((bitpos % container_bitsize) + v->bitsize <= container_bitsize
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&& TYPE_LENGTH (type) <= (int) sizeof (LONGEST))
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@@ -1939,6 +1942,8 @@ value_primitive_field (struct value *arg1, int offset,
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else
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{
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v = allocate_value (type);
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+
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+ /* TYPE_LENGTH of TYPE gets initialized by allocate_value. */
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memcpy (value_contents_raw (v),
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value_contents_raw (arg1) + offset,
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TYPE_LENGTH (type));
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