feat(checkpoint): enable serializer checkpoint in SHARE

Expose serializer entries that can write checkpoint files with an explicit base path in SHARE builds.

Keep the checkpoint path separate from the flash checkpoint layout: callers that need flash-backed checkpoints can set the serializer flash-checkpoint state through a C wrapper instead of relying on a non-null path.

Author: good-circle

include/checkpoint/serializer.h

@@ -57,6 +57,8 @@ class Serializer
 
     void serializeRegs(uint8_t* serialize_base_addr);
 
+    void setStoreCptInFlash(bool enable);
+
     explicit Serializer();
 #ifdef CONFIG_LIBCHECKPOINT_RESTORER
     void init(bool store_cpt_in_flash, bool enable_libcheckpoint);

src/checkpoint/serializer.cpp

@@ -504,6 +504,10 @@ void Serializer::serialize(uint64_t inst_count, const char *checkpoint_base_path
 #endif
 }
 
+void Serializer::setStoreCptInFlash(bool enable) {
+  store_cpt_in_flash = enable;
+}
+
 #ifdef CONFIG_LIBCHECKPOINT_RESTORER
 
 #define USING_METADATA_OVERRIDE_DEFAULT_MEMLAYOUT(variable_name) \
@@ -662,4 +666,12 @@ void serialize_reg_to_mem() {
   serializer.serializeRegs(get_pmem());
 }
 
+void set_store_cpt_in_flash(bool enable) {
+  serializer.setStoreCptInFlash(enable);
+}
+
+void serialize_checkpoint(const char *base_filepath) {
+  serializer.serialize(0, base_filepath);
+}
+
 }