Correct invalid assumptions made by (mostly) DWARF-2 tests

Address issues triggered by the MIPS ISA bit handling change, usually in
tests that make artificial DWARF-2 records:

* gdb.cp/expand-psymtabs-cxx.exp -- this test is debugging an object file
  and assuming addresses will be 0; with the ISA bit set code addresses
  are 1 instead:

(gdb) PASS: gdb.cp/expand-psymtabs-cxx.exp: set language c++
p 'method(long)'
$1 = {void (long)} 0x1 <method(long)>
(gdb) FAIL: gdb.cp/expand-psymtabs-cxx.exp: before expand
p method
$2 = {void (long)} 0x1 <method(long)>
(gdb) FAIL: gdb.cp/expand-psymtabs-cxx.exp: force expand
p 'method(long)'
$3 = {void (long)} 0x1 <method(long)>
(gdb) FAIL: gdb.cp/expand-psymtabs-cxx.exp: after expand

  Fix by matching any hex number, there's no value AFAICT for the test
  in matching 0 exactly, and I suppose the method's offset within
  section can be non-zero for some other reasons on other targets too.

* gdb.cp/nsalias.exp -- this assumes instructions can be aligned
  arbitrarily and places code labels at odd addreses, setting the ISA
  bit and wreaking havoc:

(gdb) PASS: gdb.cp/nsalias.exp: print outer::inner::innermost::x
list outer::inner::innermost::foo
Function "outer::inner::innermost::foo" not defined.
(gdb) FAIL: gdb.cp/nsalias.exp: list outer::inner::innermost::foo
break *outer::inner::innermost::foo
No symbol "foo" in namespace "outer::inner::innermost".
(gdb) FAIL: gdb.cp/nsalias.exp: setting breakpoint at
*outer::inner::innermost::foo
delete $bpnum
No breakpoint number 6.
(gdb) FAIL: gdb.cp/nsalias.exp: (outer::inner::innermost): delete $bpnum

  -- etc., etc...  Fix by aligning labels to 4; required by many
  processors.

* gdb.dwarf2/dw2-canonicalize-type.exp, gdb.dwarf2/dw2-empty-pc-range.exp,
  gdb.dwarf2/pr11465.exp -- these assume an instruction and consequently
  a function can take as little as 1 byte, which makes it impossible to
  look up a code symbol by an address with the ISA bit set as the
  address is already beyond the end of the function:

(gdb) ptype f
No symbol "f" in current context.
(gdb) FAIL: gdb.dwarf2/dw2-canonicalize-type.exp: ptype f

(gdb) PASS: gdb.dwarf2/dw2-empty-pc-range.exp: empty range before CU load
ptype realrange
No symbol "realrange" in current context.
(gdb) FAIL: gdb.dwarf2/dw2-empty-pc-range.exp: valid range after CU load

(gdb) p N::c.C
Cannot take address of method C.
(gdb) FAIL: gdb.dwarf2/pr11465.exp: p N::c.C

  -- fix by increasing the size of the function to 4 (perhaps code in
  gdb/mips-tdep.c could look up code symbols up to twice, with and
  failing that without the ISA bit set, but it seems wrong to me to
  implement specific handling for invalid code just to satisfy test
  cases that assume too much about the target).

* gdb.dwarf2/dw2-case-insensitive.exp -- an artificial code label is
  created, but does not work because data (a `.align' pseudo-op in this
  case) follows and as a result the label has no MIPS16 or microMIPS
  annotation in the symbol table:

(gdb) PASS: gdb.dwarf2/dw2-case-insensitive.exp: set case-sensitive off
info functions fUnC_lang
All functions matching regular expression "fUnC_lang":

File file1.txt:
foo FUNC_lang(void);

Non-debugging symbols:
0x004006e0  FUNC_lang_start
(gdb) FAIL: gdb.dwarf2/dw2-case-insensitive.exp: regexp case-sensitive off

  -- fix by adding a `.insn' pseudo-op on MIPS targets; the pseudo-op
  marks data as instructions.

* gdb.dwarf2/dw2-stack-boundary.exp -- the test case enables complaints
  and assumes none will be issued beyond ones explicitly arranged by the
  test case, however overlapping sections are noticed while minimal
  symbols are looked up by `mips_adjust_dwarf2_addr' in DWARF-2 record
  processing:

(gdb) set complaints 100
(gdb) PASS: gdb.dwarf2/dw2-stack-boundary.exp: set complaints 100
file ./dw2-stack-boundary
Reading symbols from ./dw2-stack-boundary...location description stack
underflow...location description stack overflow...unexpected overlap
between:
 (A) section `.reginfo' from `.../gdb.dwarf2/dw2-stack-boundary' [0x0, 0x18)
 (B) section `*COM*' from `.../gdb.dwarf2/dw2-stack-boundary' [0x0, 0x0).
Will ignore section B...unexpected overlap between:
 (A) section `.reginfo' from `.../gdb.dwarf2/dw2-stack-boundary' [0x0, 0x18)
 (B) section `*UND*' from `.../gdb.dwarf2/dw2-stack-boundary' [0x0, 0x0).
Will ignore section B...unexpected overlap between:
 (A) section `.reginfo' from `.../gdb.dwarf2/dw2-stack-boundary' [0x0, 0x18)
 (B) section `*ABS*' from `.../gdb.dwarf2/dw2-stack-boundary' [0x0, 0x0).
Will ignore section B...done.

(gdb) FAIL: gdb.dwarf2/dw2-stack-boundary.exp: check partial symtab errors

  -- fix by ignoring any extra noise as long as what we look for is
  found.

	* gdb.cp/expand-psymtabs-cxx.exp: Accept any address of
	`method(long)', not just 0x0.
	* gdb.cp/nsalias.exp: Align code labels to 4.
	* gdb.dwarf2/dw2-canonicalize-type.S (main): Expand to 4-bytes.
	* gdb.dwarf2/dw2-empty-pc-range.S (main): Likewise.
	* gdb.dwarf2/pr11465.S (_ZN1N1cE): Likewise.
	* gdb.dwarf2/dw2-case-insensitive.c (START_INSNS): New macro.
	(cu_text_start, FUNC_lang_start): Use `START_INSNS'.
	* gdb.dwarf2/dw2-stack-boundary.exp: Accept noise in complaints.

8 files changed, 39 insertions, 15 deletions

diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index 17b0146..f1584e0 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,15 @@
+2014-12-04  Maciej W. Rozycki  <macro@codesourcery.com>
+
+	* gdb.cp/expand-psymtabs-cxx.exp: Accept any address of
+	`method(long)', not just 0x0.
+	* gdb.cp/nsalias.exp: Align code labels to 4.
+	* gdb.dwarf2/dw2-canonicalize-type.S (main): Expand to 4-bytes.
+	* gdb.dwarf2/dw2-empty-pc-range.S (main): Likewise.
+	* gdb.dwarf2/pr11465.S (_ZN1N1cE): Likewise.
+	* gdb.dwarf2/dw2-case-insensitive.c (START_INSNS): New macro.
+	(cu_text_start, FUNC_lang_start): Use `START_INSNS'.
+	* gdb.dwarf2/dw2-stack-boundary.exp: Accept noise in complaints.
+
 2014-12-02  Doug Evans  <dje@google.com>
 
         PR symtab/17602
diff --git a/gdb/testsuite/gdb.cp/expand-psymtabs-cxx.exp b/gdb/testsuite/gdb.cp/expand-psymtabs-cxx.exp
index d85b4de..6b52a00 100644
--- a/gdb/testsuite/gdb.cp/expand-psymtabs-cxx.exp
+++ b/gdb/testsuite/gdb.cp/expand-psymtabs-cxx.exp
@@ -30,9 +30,9 @@ gdb_test_no_output "set language c++"
 
 # FAIL was:
 # $1 = {<text variable, no debug info>} 0
-gdb_test "p 'method(long)'" { = {void \(long\)} 0x0 <method.long.>} \
+gdb_test "p 'method(long)'" " = {void \\(long\\)} $hex <method.long.>" \
     "before expand"
-gdb_test "p method" { = {void \(long\)} 0x0 <method.long.>} \
+gdb_test "p method" " = {void \\(long\\)} $hex <method.long.>" \
     "force expand"
-gdb_test "p 'method(long)'" { = {void \(long\)} 0x0 <method.long.>} \
+gdb_test "p 'method(long)'" " = {void \\(long\\)} $hex <method.long.>" \
     "after expand"
diff --git a/gdb/testsuite/gdb.cp/nsalias.exp b/gdb/testsuite/gdb.cp/nsalias.exp
index d46c302..bd7f8ed 100644
--- a/gdb/testsuite/gdb.cp/nsalias.exp
+++ b/gdb/testsuite/gdb.cp/nsalias.exp
@@ -153,20 +153,20 @@ Dwarf::assemble $asm_file {
 
 	    subprogram {
 		{specification :$im_foo_label}
-		{low_pc 0x1 DW_FORM_addr}
-		{high_pc 0x2 DW_FORM_addr}
+		{low_pc 0x4 DW_FORM_addr}
+		{high_pc 0x7 DW_FORM_addr}
 	    }
 
 	    subprogram {
 		{specification :$i_foo_label}
-		{low_pc 0x3 DW_FORM_addr}
-		{high_pc 0x4 DW_FORM_addr}
+		{low_pc 0x8 DW_FORM_addr}
+		{high_pc 0xb DW_FORM_addr}
 	    }
 
 	    subprogram {
 		{specification :$o_foo_label}
-		{low_pc 0x5 DW_FORM_addr}
-		{high_pc 0x6 DW_FORM_addr}
+		{low_pc 0xc DW_FORM_addr}
+		{high_pc 0xf DW_FORM_addr}
 	    }
 	}
     }
diff --git a/gdb/testsuite/gdb.dwarf2/dw2-canonicalize-type.S b/gdb/testsuite/gdb.dwarf2/dw2-canonicalize-type.S
index 302ef20..14c1034 100644
--- a/gdb/testsuite/gdb.dwarf2/dw2-canonicalize-type.S
+++ b/gdb/testsuite/gdb.dwarf2/dw2-canonicalize-type.S
@@ -15,7 +15,8 @@
 
 	.text
 	.globl main
-main:	.byte 0
+main:
+	.4byte	0
 .Lmain_end:
 	.section	.debug_info
 debug_start:
diff --git a/gdb/testsuite/gdb.dwarf2/dw2-case-insensitive.c b/gdb/testsuite/gdb.dwarf2/dw2-case-insensitive.c
index 9ec7b25..009f60b 100644
--- a/gdb/testsuite/gdb.dwarf2/dw2-case-insensitive.c
+++ b/gdb/testsuite/gdb.dwarf2/dw2-case-insensitive.c
@@ -15,13 +15,22 @@
    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
+/* Target-specific way of forcing an instruction label.  */
+#ifdef __mips__
+#define START_INSNS asm (".insn");
+#else
+#define START_INSNS
+#endif
+
 /* Use DW_LANG_Fortran90 for case insensitive DWARF.  */
 asm (".globl cu_text_start");
 asm ("cu_text_start:");
+START_INSNS
 
 asm (".globl FUNC_lang_start");
 asm (".p2align 4");
 asm ("FUNC_lang_start:");
+START_INSNS
 
 void
 FUNC_lang (void)
diff --git a/gdb/testsuite/gdb.dwarf2/dw2-empty-pc-range.S b/gdb/testsuite/gdb.dwarf2/dw2-empty-pc-range.S
index 7409893..08987ac 100644
--- a/gdb/testsuite/gdb.dwarf2/dw2-empty-pc-range.S
+++ b/gdb/testsuite/gdb.dwarf2/dw2-empty-pc-range.S
@@ -15,7 +15,7 @@
 
 	.text
 pc_start:
-	.byte	0
+	.4byte	0
 pc_end:
 
 	.section	.debug_info
diff --git a/gdb/testsuite/gdb.dwarf2/dw2-stack-boundary.exp b/gdb/testsuite/gdb.dwarf2/dw2-stack-boundary.exp
index ac8cbab..12c6691 100644
--- a/gdb/testsuite/gdb.dwarf2/dw2-stack-boundary.exp
+++ b/gdb/testsuite/gdb.dwarf2/dw2-stack-boundary.exp
@@ -38,7 +38,7 @@ if [is_remote host] {
     }
 }
 gdb_test_no_output "set complaints 100"
-gdb_test "file $binfile" {Reading symbols from .*\.\.\.location description stack underflow\.\.\.location description stack overflow\.\.\.done\.} "check partial symtab errors"
+gdb_test "file $binfile" {Reading symbols from .*\.\.\.location description stack underflow\.\.\.location description stack overflow\.\.\..*done\.} "check partial symtab errors"
 
 gdb_test "p underflow" {Asked for position 0 of stack, stack only has 0 elements on it\.}
 gdb_test "p overflow" " = 2"
diff --git a/gdb/testsuite/gdb.dwarf2/pr11465.S b/gdb/testsuite/gdb.dwarf2/pr11465.S
index 45a0a71..72cebb0 100644
--- a/gdb/testsuite/gdb.dwarf2/pr11465.S
+++ b/gdb/testsuite/gdb.dwarf2/pr11465.S
@@ -39,7 +39,7 @@
 text_start:
 _ZN1N1cE:
 	/* Valid function must have non-empty PC range.  */
-	.byte 0
+	.4byte	0
 text_end:
 
 	.section	.debug_info
@@ -117,7 +117,8 @@ dieaf:	.uleb128 0xe		/* DW_TAG_const_type */
 dieb4:	.uleb128 0xf		/* DW_TAG_subprogram */
 	.4byte	die95-d		/* DW_AT_abstract_origin */
 	.4byte	_ZN1N1cE	/* DW_AT_low_pc */
-	.4byte	_ZN1N1cE + 1	/* DW_AT_high_pc */
+	.4byte	_ZN1N1cE + (text_end - text_start)
+				/* DW_AT_high_pc */
 diec9:	.uleb128 0x10		/* DW_TAG_subprogram */
 	.4byte	die9f-d		/* DW_AT_abstract_origin */
 	.byte	2f-1f		/* DW_AT_location */
@@ -136,7 +137,8 @@ dieda:	.uleb128 0x11		/* DW_TAG_subprogram */
 	.4byte	.LASF8		/* DW_AT_name */
 	.4byte	dief2-d		/* DW_AT_type */
 	.4byte	_ZN1N1cE	/* DW_AT_low_pc */
-	.4byte	_ZN1N1cE + 1	/* DW_AT_high_pc */
+	.4byte	_ZN1N1cE + (text_end - text_start)
+				/* DW_AT_high_pc */
 dief2:	.uleb128 0x12		/* DW_TAG_base_type */
 	.byte	0x4		/* DW_AT_byte_size */
 	.byte	0x5		/* DW_AT_encoding */