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* gdb.c++/hang.exp: Check for corruption of the cv_type chain.

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* gdb.c++/hang3.C: New file.
This commit is contained in:
Jim Blandy 2002-05-04 20:51:16 +00:00
parent 0816590b14
commit 188baff3f1
3 changed files with 28 additions and 4 deletions
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5
gdb/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2002-05-03 Jim Blandy <jimb@redhat.com>
* gdb.c++/hang.exp: Check for corruption of the cv_type chain.
* gdb.c++/hang3.C: New file.
2002-05-04 Andrew Cagney <ac131313@redhat.com>
* gdb.base/default.exp: Remove obsolete code.

23
gdb/testsuite/gdb.c++/hang.exp
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@ -29,13 +29,13 @@ if { [skip_cplus_tests] } { continue }
set testfile hang
set binfile ${objdir}/${subdir}/${testfile}
foreach file {hang1 hang2} {
if { [gdb_compile "${srcdir}/${subdir}/${file}.C" "${file}.o" object {debug c++}] != "" } {
foreach file {hang1 hang2 hang3} {
if {[gdb_compile "${srcdir}/${subdir}/${file}.C" "${file}.o" object {c++ debug}] != ""} {
gdb_suppress_entire_file "Testcase compile failed, so all tests in this file will automatically fail."
}
}
if {[gdb_compile "hang1.o hang2.o" ${binfile} executable {debug c++}] != "" } {
if {[gdb_compile "hang1.o hang2.o hang3.o" ${binfile} executable {c++ debug}] != "" } {
gdb_suppress_entire_file "Testcase compile failed, so all tests in this file will automatically fail."
}
@ -110,4 +110,19 @@ gdb_load ${binfile}
# in `cleanup_undefined_types' corrupted the target type's `cv_type'
# ring, `finish_cv_type' enters an infinite loop.
gdb_test "print var_in_b" " = 1729" "can read debug info"
# This checks that GDB recognizes when a structure is about to be
# overwritten, and refuses, with a complaint.
gdb_test "print var_in_b" " = 1729" "doesn't overwrite struct type"
# This checks that cleanup_undefined_types doesn't create corrupt
# cv_type chains. Note that var_in_hang3 does need to be declared in
# a separate compilation unit, whose psymtab depends on hang1.o's
# psymtab. Otherwise, GDB won't call cleanup_undefined_types (as it
# finishes hang1.o's symbols) before it calls make_cv_type (while
# reading hang3.o's symbols).
#
# The bug only happens when you compile with -gstabs+; Otherwise, GCC
# won't include the `const' qualifier on `const_B_ptr' in `hang3.o''s
# STABS, so GDB won't try to create a const variant of the smashed
# struct type, and get caught by the corrupted cv_type chain.
gdb_test "print var_in_hang3" " = 42" "doesn't corrupt cv_type chain"

4
gdb/testsuite/gdb.c++/hang3.C Normal file
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@ -0,0 +1,4 @@
#include "hang.H"
const struct B *const_B_ptr;
int var_in_hang3 = 42;