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PR gdb/17384: Do not print memory errors in safe_read_memory_integer

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If accessing memory via safe_read_memory_integer fails, that function
used to print an error message even though callers were perfectly able
to handle (and even expected!) failures.

This patch removes the confusing message by changing the routine to
directly use target_read_memory.

gdb/ChangeLog:

	PR gdb/17384
	* corefile.c (struct captured_read_memory_integer_arguments): Remove.
	(do_captured_read_memory_integer): Remove.
	(safe_read_memory_integer): Use target_read_memory directly instead
	of catching errors in do_captured_read_memory_integer.
This commit is contained in:
Ulrich Weigand 2014-09-17 17:29:27 +02:00
parent 2569ceb0b0
commit 5e43d46791
2 changed files with 13 additions and 45 deletions
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8
gdb/ChangeLog
View File

@ -1,3 +1,11 @@
2014-09-17 Ulrich Weigand  <uweigand@de.ibm.com>
PR gdb/17384
* corefile.c (struct captured_read_memory_integer_arguments): Remove.
(do_captured_read_memory_integer): Remove.
(safe_read_memory_integer): Use target_read_memory directly instead
of catching errors in do_captured_read_memory_integer.
2014-09-16 Maciej W. Rozycki <macro@codesourcery.com>
* CONTRIBUTE (Coding Standards): For internals refer to wiki,

50
gdb/corefile.c
View File

@ -290,40 +290,6 @@ read_code (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
memory_error (status, memaddr);
}
/* Argument / return result struct for use with
do_captured_read_memory_integer(). MEMADDR and LEN are filled in
by gdb_read_memory_integer(). RESULT is the contents that were
successfully read from MEMADDR of length LEN. */
struct captured_read_memory_integer_arguments
{
CORE_ADDR memaddr;
int len;
enum bfd_endian byte_order;
LONGEST result;
};
/* Helper function for gdb_read_memory_integer(). DATA must be a
pointer to a captured_read_memory_integer_arguments struct.
Return 1 if successful. Note that the catch_errors() interface
will return 0 if an error occurred while reading memory. This
choice of return code is so that we can distinguish between
success and failure. */
static int
do_captured_read_memory_integer (void *data)
{
struct captured_read_memory_integer_arguments *args
= (struct captured_read_memory_integer_arguments*) data;
CORE_ADDR memaddr = args->memaddr;
int len = args->len;
enum bfd_endian byte_order = args->byte_order;
args->result = read_memory_integer (memaddr, len, byte_order);
return 1;
}
/* Read memory at MEMADDR of length LEN and put the contents in
RETURN_VALUE. Return 0 if MEMADDR couldn't be read and non-zero
if successful. */
@ -333,19 +299,13 @@ safe_read_memory_integer (CORE_ADDR memaddr, int len,
enum bfd_endian byte_order,
LONGEST *return_value)
{
int status;
struct captured_read_memory_integer_arguments args;
gdb_byte buf[sizeof (LONGEST)];
args.memaddr = memaddr;
args.len = len;
args.byte_order = byte_order;
if (target_read_memory (memaddr, buf, len))
return 0;
status = catch_errors (do_captured_read_memory_integer, &args,
"", RETURN_MASK_ALL);
if (status)
*return_value = args.result;
return status;
*return_value = extract_signed_integer (buf, len, byte_order);
return 1;
}
LONGEST