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(value_fetch_lazy): Avoid 0-length fetches.

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John Gilmore 1991-10-25 09:03:36 +00:00
parent db138ce2a7
commit 9cb602e111
2 changed files with 10 additions and 2 deletions
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4
gdb/ChangeLog
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@ -1,3 +1,7 @@
Fri Oct 25 02:02:13 1991 John Gilmore (gnu at cygnus.com)
* valops.c (value_fetch_lazy): Avoid 0-length fetches.
Thu Oct 24 23:06:40 1991 Fred Fish (fnf at cygnus.com)
* dwarfread.c: Add casts to remove compiler warnings.

8
gdb/valops.c
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@ -163,6 +163,9 @@ value_at_lazy (type, addr)
data from the user's process, and clears the lazy flag to indicate
that the data in the buffer is valid.
If the value is zero-length, we avoid calling read_memory, which would
abort. We mark the value as fetched anyway -- all 0 bytes of it.
This function returns a value because it is used in the VALUE_CONTENTS
macro as part of an expression, where a void would not work. The
value is ignored. */
@ -173,8 +176,9 @@ value_fetch_lazy (val)
{
CORE_ADDR addr = VALUE_ADDRESS (val) + VALUE_OFFSET (val);
read_memory (addr, VALUE_CONTENTS_RAW (val),
TYPE_LENGTH (VALUE_TYPE (val)));
if (TYPE_LENGTH (VALUE_TYPE (val)))
read_memory (addr, VALUE_CONTENTS_RAW (val),
TYPE_LENGTH (VALUE_TYPE (val)));
VALUE_LAZY (val) = 0;
return 0;
}