wingo pushed a commit to branch master
in repository guile.
commit 8dcf3c6163bba444cd459d9ffd22cc5f627fe6c8
Author: Mark H Weaver <[email protected]>
Date: Thu Mar 26 22:51:16 2015 -0400
Work around requirement that size be non-zero in GDB 'open-memory'.
* module/system/base/types.scm (memory-port): Handle zero size case
specially.
---
module/system/base/types.scm | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/module/system/base/types.scm b/module/system/base/types.scm
index ea2f3bc..7368171 100644
--- a/module/system/base/types.scm
+++ b/module/system/base/types.scm
@@ -117,8 +117,12 @@ SIZE is omitted, return an unbounded port to the memory at
ADDRESS."
(let ((open (memory-backend-open backend)))
(open address #f)))
((_ backend address size)
- (let ((open (memory-backend-open backend)))
- (open address size)))))
+ (if (zero? size)
+ ;; GDB's 'open-memory' raises an error when size
+ ;; is zero, so we must handle that case specially.
+ (open-bytevector-input-port '#vu8())
+ (let ((open (memory-backend-open backend)))
+ (open address size))))))
(define (get-word port)
"Read a word from PORT and return it as an integer."
