[Mod] ramoops修改为内核模块以动态加载,项目依据需要自行加载

.gitignore

@@ -20,3 +20,7 @@ ncscope.*
 
 __pycache__
 .vscode
+
+.cache/
+compile_commands.json
+

build/boards/cv181x/cv1813h_milkv_duos_sd/linux/cvitek_cv1813h_milkv_duos_sd_defconfig

@@ -535,7 +535,7 @@ CONFIG_MAGIC_SYSRQ=y
 
 CONFIG_PSTORE=y
 CONFIG_PSTORE_CONSOLE=y
-CONFIG_PSTORE_RAM=y
+CONFIG_PSTORE_RAM=m
 CONFIG_PSTORE_PMSG=y
 
 #CONFIG_FUNCTION_TRACER=y

osdrv/extdrv/testing/Makefile

@@ -2,7 +2,7 @@
 # Makefile for the Linux testings.
 #
 
-obj-m += oops.o
+obj-m += test_ps.o
 
 all:
 	$(MAKE) ARCH=$(ARCH) CROSS_COMPILE=$(CROSS_COMPILE) -C $(KERNEL_DIR) M=$(shell pwd) modules

osdrv/extdrv/testing/oops.c

@@ -1,20 +0,0 @@
-#include <linux/init.h>
-#include <linux/module.h>
-
-static int __init trigger_oops_init(void) {
-    int *ptr = (int *)0;               // 强制类型转换0地址为指针并尝试读取
-
-    printk(KERN_ALERT "Oops will trigger now!\n");
-    printk(KERN_ALERT "Dereferenced NULL pointer value: %d\n", *ptr);
-
-    return 0;           // 加载模块不应该有返回值，但这里返回0避免编译警告。
-}
-
-static void __exit trigger_oops_exit(void) {
-    printk(KERN_ALERT "Oops trigger module exiting\n");
-}
-
-module_init(trigger_oops_init);
-module_exit(trigger_oops_exit);
-
-MODULE_LICENSE("Dual BSD/GPL");

osdrv/extdrv/testing/test_ps.c

@@ -0,0 +1,55 @@
+#include "asm-generic/int-ll64.h"
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+
+static unsigned int test_type;
+module_param(test_type, uint, 0400);
+MODULE_PARM_DESC(test_type, "set to 1 to try to OOM (default 0)");
+
+static int trigger_oops(void) {
+    int *ptr = (int *)0;               // 强制类型转换0地址为指针并尝试读取
+
+    printk(KERN_ALERT "Dereferenced NULL pointer value: %d\n", *ptr);
+
+    return 0;
+}
+
+static int trigger_oom(void) {
+    void *memory = NULL;
+    size_t memory_size = 0;
+
+    printk(KERN_INFO "oom_trigger: Initializing the oom_trigger LKM\n");
+
+    memory_size = 100*1024*1024;
+    while (1) { // 尝试分配大块内存
+        memory = vmalloc(memory_size);
+        if (!memory) {
+            printk(KERN_ALERT "oom_trigger: Memory allocation failed\n");
+            break;
+        }
+
+        // 仅为防止编译器优化，实际不访问分配的内存
+        memset(memory, 0, memory_size);
+    }
+
+    return 0;
+}
+
+static int trigger_init(void) {
+    if (test_type)
+        trigger_oom();
+    else
+        trigger_oops();
+
+    return 0;           // 加载模块不应该有返回值，但这里返回0避免编译警告。
+}
+
+static void __exit trigger_exit(void) {
+    printk(KERN_INFO "oom_trigger: Exiting the oom_trigger LKM\n");
+}
+
+module_init(trigger_init);
+module_exit(trigger_exit);