From 855440f584d2591435189816f808b0ee563288e3 Mon Sep 17 00:00:00 2001
From: Max Wash <mbswash@gmail.com>
Date: Sat, 21 Feb 2026 11:22:51 +0000
Subject: [PATCH] vm: add trace output

---
 vm/memblock.c  | 36 +++++++++++++++++++++++++++++++-----
 vm/vm-object.c |  4 ++++
 2 files changed, 35 insertions(+), 5 deletions(-)

diff --git a/vm/memblock.c b/vm/memblock.c
index 86f0263..ca33dd9 100644
--- a/vm/memblock.c
+++ b/vm/memblock.c
@@ -19,10 +19,11 @@
     contributors may be used to endorse or promote products derived from this
     software without specific prior written permission.
  */
-#include <limits.h>
 #include <kernel/libc/string.h>
 #include <kernel/memblock.h>
+#include <kernel/printk.h>
 #include <kernel/types.h>
+#include <limits.h>
 #include <stdbool.h>
 
 #define MIN(a, b)  ((a) < (b) ? (a) : (b))
@@ -447,10 +448,10 @@ void __next_memory_region(
 			}
 
 			/* we want the area that is overlapped by both
-			        region M (m_start - m_end) : The region defined
-			   as system memory. region R (r_start - r_end) : The
-			   region defined as free / outside of any reserved
-			   regions.
+			    - region M (m_start - m_end) : The region defined
+			      as system memory.
+			    - region R (r_start - r_end) : The region defined as
+			      free / outside of any reserved regions.
 			 */
 			it->it_base = MAX(m_start, r_start);
 			it->it_limit = MIN(m_end, r_end);
@@ -497,3 +498,28 @@ void *memblock_phys_to_virt(phys_addr_t p)
 {
 	return (void *)(p + memblock.m_voffset);
 }
+
+#ifdef TRACE
+static void memblock_type_dump(struct memblock_type *type)
+{
+	tracek("%s:", type->name);
+	for (size_t i = 0; i < type->count; i++) {
+		tracek("  [%zx-%zx]",
+		       type->regions[i].base,
+		       type->regions[i].limit);
+	}
+}
+
+extern void memblock_dump(void)
+{
+	memblock_type_dump(&memblock.memory);
+	memblock_type_dump(&memblock.reserved);
+
+	tracek("free:");
+	struct memblock_iter it;
+	for_each_free_mem_range(&it, 0, ADDR_MAX)
+	{
+		tracek("  [%zx-%zx]", it.it_base, it.it_limit);
+	}
+}
+#endif
diff --git a/vm/vm-object.c b/vm/vm-object.c
index c7e3c31..f703dc4 100644
--- a/vm/vm-object.c
+++ b/vm/vm-object.c
@@ -286,6 +286,10 @@ extern struct vm_page *vm_object_alloc_page(
 			return NULL;
 		}
 
+		tracek("vm-object: [%s] alloc offset %zx -> page %zx",
+		       vo->vo_name,
+		       offset,
+		       vm_page_get_paddr(page));
 		page->p_vmo_offset = offset;
 		vo->vo_pages.b_root = &page->p_bnode;
 		btree_insert_fixup(&vo->vo_pages, &page->p_bnode);