[PATCH 1/3] set trust-readonly-sections off in test cases

[Yao Qi <yao@codesourcery.com>]

In the test cases, if GDB modified code in the inferior, it should
'set trust-readonly-sections off' too.  Similarly, users has to set it
off if users modified code for some purpose.

gdb/testsuite:

2013-09-06  Yao Qi  <yao@codesourcery.com>

	* gdb.base/break-always.exp: Set trust-readonly-sections off.
	* gdb.mi/mi-fill-memory.exp: Likewise.

gdb/doc:

2013-09-06  Yao Qi  <yao@codesourcery.com>

	* gdb.texinfo (File): Mention that user has
	'set trust-readonly-sections off' to get updated contents if
	they are modified.
---
 gdb/doc/gdb.texinfo                     |    5 ++++-
 gdb/testsuite/gdb.base/break-always.exp |    4 ++++
 gdb/testsuite/gdb.mi/mi-fill-memory.exp |    5 +++++
 3 files changed, 13 insertions(+), 1 deletions(-)

diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo
index 21250fe..d8e4adf 100644
--- a/gdb/doc/gdb.texinfo
+++ b/gdb/doc/gdb.texinfo
@@ -16678,7 +16678,10 @@ The default is off.
 @item set trust-readonly-sections off
 Tell @value{GDBN} not to trust readonly sections.  This means that
 the contents of the section might change while the program is running,
-and must therefore be fetched from the target when needed.
+and must therefore be fetched from the target when needed.  If user
+modified the code in the target program, user has to
+@code{set trust-readonly-sections off} to guarantee @value{GDBN} reads
+updated contents from the target program instead of object file.
 
 @item show trust-readonly-sections
 Show the current setting of trusting readonly sections.
diff --git a/gdb/testsuite/gdb.base/break-always.exp b/gdb/testsuite/gdb.base/break-always.exp
index b0a9faf..16f6d47 100644
--- a/gdb/testsuite/gdb.base/break-always.exp
+++ b/gdb/testsuite/gdb.base/break-always.exp
@@ -69,6 +69,10 @@ gdb_test "p /x \$shadow = *(char *) $bp_address" \
 # and still leave the breakpoint insn planted.  Try twice with
 # different values, in case we happen to be writting exactly what was
 # there already.
+# Turn option "trust-readonly-sections" off to force GDB to read
+# contents from the target instead of the object file.
+gdb_test_no_output "set trust-readonly-sections off"
+
 gdb_test "p /x *(char *) $bp_address = 0" \
     " = 0x0" \
     "write 0 to breakpoint's address"
diff --git a/gdb/testsuite/gdb.mi/mi-fill-memory.exp b/gdb/testsuite/gdb.mi/mi-fill-memory.exp
index 5f68cbb..ac9313b 100644
--- a/gdb/testsuite/gdb.mi/mi-fill-memory.exp
+++ b/gdb/testsuite/gdb.mi/mi-fill-memory.exp
@@ -51,6 +51,11 @@ mi_gdb_test "4-data-write-memory-bytes \$pc ab 8"\
 	"4\\\^done" \
 	"memory successfully filled (8 bytes)"
 
+# Turn option "trust-readonly-sections" off to force GDB to read
+# contents from the target instead of the object file.
+mi_gdb_test "-gdb-set trust-readonly-sections off" "\\\^done" \
+    "set trust-readonly-sections off"
+
 mi_gdb_test "5-interpreter-exec console \"x \$pc\"" \
     ".*0xabababab.*" \
     "pattern correctly read from memory"
-- 
1.7.7.6