[testsuite patch] for: [PATCH] [PR corefiles/17808] i386: Fix internal error when prstatus in core file is too big

[Jan Kratochvil <jan.kratochvil@redhat.com>]

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On Thu, 08 Jan 2015 17:16:20 +0100, Andreas Arnez wrote:
> Note that this behavior deviates from the default policy: In general, if
> some future kernel adds new registers to a register set, then a GDB
> unaware of this extension would read the known subset and just ignore
> the unknown bytes.

This patch is about 'assert' vs. 'if' so I find this paragraph outside of the
topic of this thread/regression.


Here is a testcase for the assertion crash regression.


Thanks,
Jan

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gdb/testsuite/ChangeLog
2015-01-08  Jan Kratochvil  <jan.kratochvil@redhat.com>

	PR corefiles/17808
	* gdb.arch/i386-biarch-core.core.bz2.uu: New file.
	* gdb.arch/i386-biarch-core.exp: New file.

diff --git a/gdb/testsuite/gdb.arch/i386-biarch-core.core.bz2.uu b/gdb/testsuite/gdb.arch/i386-biarch-core.core.bz2.uu
new file mode 100644
index 0000000..4221e99
--- /dev/null
+++ b/gdb/testsuite/gdb.arch/i386-biarch-core.core.bz2.uu
@@ -0,0 +1,28 @@
+# Copyright 2015 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+begin 600 i386-biarch-core.core.bz2
+M0EIH.3%!629361`P1\P`!)?_____\9'@"8Q)6P380'9@'&#`0D@``"``%(``
+M@`#`"!<(L`%F"(:$GH13::F-)M&D&U,AD:`--#)M0&FT0XR9--,)D9`P(Q-&
+M",(-&F``02)%38HT]0T`&AH```'H@``T^>9T*(,("&)SE`>`9@+GP=[,N)KB
+M'I8BL(L]N5TCY\%V]/?DB.BN*UZ'U@]TN7-]UJ5\_%0QTT<*086#%MHT7XVJ
+M9D"+C!"2*L:8D1XPD!`--M@*XT1H5RFYN&)(!0P0#:`I:;2;$5M&\*9"0@%:
+MK@X[T()M)9N7`D$VA!^63)%,;@8LT`(7\K&[7G;U:"B6'!GG+46ALOZF.2F-
+M!@>C*%86X$-]C2`KE;HG)UL(913VR2G]0BD:J=Z_`G@S,`W%.8RMS-#5P:J0
+MAJ2\8&X?@DE;UF68QHM<,D`('::J65/S:PAG*R-09["8DBI)'V]Y.[(/AM*L
+M"X_O^V;%FY.S6Q]FM=D37>5F,%4-F1ZF#,CFJVU;H*^IT<(%<V`.32$`JU["
+/G`68?\7<D4X4)`0,$?,`
+`
+end
diff --git a/gdb/testsuite/gdb.arch/i386-biarch-core.exp b/gdb/testsuite/gdb.arch/i386-biarch-core.exp
new file mode 100644
index 0000000..0dcb256
--- /dev/null
+++ b/gdb/testsuite/gdb.arch/i386-biarch-core.exp
@@ -0,0 +1,59 @@
+# Copyright 2015 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# Test ability to load an elf64-i386 core file.  The provided core file was
+# elf64-x8664 one but it got binary patched to i386:
+# Elf32_Ehdr.e_machine @0x12..0x13
+# Elf64_Ehdr.e_machine @0x12..0x13
+# #define EM_386           3              /* Intel 80386 */
+# #define EM_X86_64       62              /* AMD x86-64 architecture */
+# patch @0x12: 0x3E -> 0x03
+
+standard_testfile
+
+if { ![istarget "i?86-*-*"] && ![istarget "x86_64-*-*"] } then {
+    verbose "Skipping i386-biarch-core test."
+    return
+}
+
+set corebz2uufile ${srcdir}/${subdir}/${testfile}.core.bz2.uu
+set corefile ${objdir}/${subdir}/${testfile}.core
+# Entry point of the original executable.
+set address 0x400078
+
+if {[catch "system \"uudecode -o - ${corebz2uufile} | bzip2 -dc >${corefile}\""] != 0} {
+    untested "failed uudecode or bzip2"
+    return -1
+}
+file stat ${corefile} corestat
+if {$corestat(size) != 102400} {
+    untested "uudecode or bzip2 produce invalid result"
+    return -1
+}
+
+gdb_exit
+gdb_start
+gdb_reinitialize_dir $srcdir/$subdir
+
+# Wrongly built GDB complains by:
+# "..." is not a core dump: File format not recognized
+# As the provided test core has 64bit PRSTATUS i386 built GDB cannot parse it.
+# This is just a problem of the test care, real-world elf64-i386 file will have
+# 32bit PRSTATUS.  One cannot prepare elf64-i386 core file from elf32-i386 by
+# objcopy as it corrupts the core file beyond all recognition.
+# "\r\nCore was generated by `\[^\r\n\]*'\\.\r\nProgram terminated with signal 11, Segmentation fault\\.\r\n.*"
+gdb_test "core-file ${corefile}" ".*" "core-file"
+
+gdb_test "x/i $address" "\r\n\[ \t\]*$address:\[ \t\]*hlt\[ \t\]*" ".text is readable"