[eros-cvs] cvs commit: eros/src/base/sys/ddb db_command.cxx db_eros.cxx

[shap@eros.cs.jhu.edu]

shap        01/01/20 14:27:39

  Modified:    src/base/sys/ddb db_command.cxx db_eros.cxx
  Log:
  Add support in the kernel debugger to print out SegWalkInfo
  structures. This was needed to track down the source of the pPage == 0
  bug, but since it isn't properly a part of the bug fix I am checking
  it in separately.

Revision  Changes    Path
1.61      +2 -0      eros/src/base/sys/ddb/db_command.cxx

Index: db_command.cxx
===================================================================
RCS file: /cvs/eros/src/base/sys/ddb/db_command.cxx,v
retrieving revision 1.60
retrieving revision 1.61
diff -u -r1.60 -r1.61
--- db_command.cxx	2001/01/10 13:16:42	1.60
+++ db_command.cxx	2001/01/20 19:27:38	1.61
@@ -375,6 +375,7 @@
 extern void	db_show_savearea_cmd(db_expr_t, int, db_expr_t, char*);
 extern void	db_show_sizes_cmd(db_expr_t, int, db_expr_t, char*);
 extern void	db_show_gdt(db_expr_t, int, db_expr_t, char*);
+extern void	db_show_walkinfo_cmd(db_expr_t, int, db_expr_t, char*);
 
 struct db_command db_show_all_cmds[] = {
 #if 0
@@ -430,6 +431,7 @@
 	{ "sizes",      db_show_sizes_cmd,	0,	0 },
 	{ "thread",     db_thread_print_cmd,	0,	0 },
 	{ "uthreads",   db_show_uthread_cmd,	0,	0 },
+	{ "walkinfo",	db_show_walkinfo_cmd, 	0,	0 },
 #ifdef DDB_WATCH
 	{ "watches",	db_listwatch_cmd, 	0,	0 },
 #endif



1.130     +36 -0     eros/src/base/sys/ddb/db_eros.cxx

Index: db_eros.cxx
===================================================================
RCS file: /cvs/eros/src/base/sys/ddb/db_eros.cxx,v
retrieving revision 1.129
retrieving revision 1.130
diff -u -r1.129 -r1.130
--- db_eros.cxx	2001/01/10 13:16:42	1.129
+++ db_eros.cxx	2001/01/20 19:27:38	1.130
@@ -1714,3 +1714,39 @@
     base += EROS_PAGE_SIZE;
   }
 }
+
+void
+db_print_walkinfo(const SegWalkInfo *wi)
+{
+#define BOOLC(x) ((x) ? 'y' : 'n')
+  db_printf("wi: vaddr 0x%08x  segBlss %d segObj 0x%08x\n"
+	    "segObjIsRed: %c offset: 0x%08x%08x\n"
+	    "redSpanBlss %d redSegOffset 0x%08x%08x\n"
+	    "writeAccess: %c capAccess: %c prompt: %c canCall: %c\n"
+	    "weakRef: %c canWrite: %c segFault %d traverseCount %d\n",
+	    wi->vaddr, wi->segBlss, wi->segObj,
+	    BOOLC(wi->segObjIsRed),
+	    (uint32_t) (wi->offset >> 32),
+	    (uint32_t) (wi->offset),
+	    wi->redSpanBlss,
+	    (uint32_t) (wi->redSegOffset >> 32),
+	    (uint32_t) (wi->redSegOffset),
+	    BOOLC(wi->writeAccess), BOOLC(wi->capAccess),
+	    BOOLC(wi->prompt),
+	    BOOLC(wi->canCall), BOOLC(wi->weakRef),
+	    BOOLC(wi->canWrite),
+	    wi->segFault, wi->traverseCount);
+#undef BOOLC
+}      
+
+void
+db_show_walkinfo_cmd(db_expr_t addr, int have_addr,
+		     db_expr_t /* count */, char * /* modif */)
+{
+  extern void DumpFixRegs(const fixregs_t *fx);
+  
+  if (have_addr == 0)
+    db_error("requires address\n");
+
+  db_print_walkinfo((const SegWalkInfo *) addr);
+}