[Xen-devel] [PATCH v2 03/12] xenctx: Output ascii version of stack also.

[Don Slutz <dslutz@xxxxxxxxxxx>]

From: Don Slutz <Don@xxxxxxxxxxxxxxx>

Signed-off-by: Don Slutz <Don@xxxxxxxxxxxxxxx>
---
 tools/xentrace/xenctx.c |   27 ++++++++++++++++++++++++++-
 1 files changed, 26 insertions(+), 1 deletions(-)

diff --git a/tools/xentrace/xenctx.c b/tools/xentrace/xenctx.c
index 06a8850..dabce16 100644
--- a/tools/xentrace/xenctx.c
+++ b/tools/xentrace/xenctx.c
@@ -640,6 +640,8 @@ static int print_code(vcpu_guest_context_any_t *ctx, int 
vcpu)
     return 0;
 }
 
+#define BYTES_PER_LINE 32
+
 static int print_stack(vcpu_guest_context_any_t *ctx, int vcpu, int width)
 {
     guest_word_t stack = stack_pointer(ctx);
@@ -647,6 +649,8 @@ static int print_stack(vcpu_guest_context_any_t *ctx, int 
vcpu, int width)
     guest_word_t frame;
     guest_word_t word;
     guest_word_t *p;
+    guest_word_t ascii[BYTES_PER_LINE/4];
+    unsigned char *bytep;
     int i;
 
     stack_limit = ((stack_pointer(ctx) + XC_PAGE_SIZE)
@@ -656,15 +660,36 @@ static int print_stack(vcpu_guest_context_any_t *ctx, int 
vcpu, int width)
     printf("\n");
     printf("Stack:\n");
     for (i=1; i<10 && stack < stack_limit; i++) {
-        while(stack < stack_limit && stack < stack_pointer(ctx) + i*32) {
+        int j = 0;
+        int k;
+
+        while(stack < stack_limit && stack < stack_pointer(ctx) + 
i*BYTES_PER_LINE) {
             p = map_page(ctx, vcpu, stack);
             if (!p)
                 return -1;
             word = read_stack_word(p, width);
+            ascii[j++] = word;
             printf(" ");
             print_stack_word(word, width);
             stack += width;
         }
+        printf("  ");
+        for (k = j; k < BYTES_PER_LINE/width; k++)
+            printf("%s ", width == 8
+                   ? "                "
+                   : "        ");
+        for (k = 0; k < j; k++) {
+            int l;
+
+            bytep = (unsigned char*)&ascii[k];
+            for (l = 0; l < width; l++) {
+                if ((*bytep < 127) && (*bytep >= 32))
+                    printf("%c", *bytep);
+                else
+                    printf(".");
+                bytep++;
+            }
+        }
         printf("\n");
     }
     printf("\n");
-- 
1.7.1


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