From 60fc1135f52277844a79f7f243aaf7cd874d4d4a Mon Sep 17 00:00:00 2001
From: Paul Bunn <paul.bunn@servicenow.com>
Date: Wed, 2 Oct 2024 15:53:27 -0700
Subject: [PATCH] Adding new load_saved function to allow loading a previously
 obtained stacktrace to be printed

---
 backward.hpp | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/backward.hpp b/backward.hpp
index 670aa45..5b1cf16 100644
--- a/backward.hpp
+++ b/backward.hpp
@@ -740,6 +740,9 @@ class StackTraceImplBase {
   void skip_n_firsts(size_t n) { _skip = n; }
 
 protected:
+  void load_saved(void** arr, size_t sz, std::vector<void*>& v) {
+    copy(&arr[0], &arr[sz], back_inserter(v));
+  }
   void load_thread_info() {
 #ifdef BACKWARD_SYSTEM_LINUX
 #ifndef __ANDROID__
@@ -881,6 +884,9 @@ class StackTraceImpl<system_tag::current_tag> : public StackTraceImplHolder {
     skip_n_firsts(0);
     return size();
   }
+  void load_saved(void** arr, size_t sz) {
+    StackTraceImplBase::load_saved(arr, sz, _stacktrace);
+  }
   size_t load_from(void *addr, size_t depth = 32, void *context = nullptr,
                    void *error_addr = nullptr) {
     load_here(depth + 8, context, error_addr);
@@ -1065,6 +1071,10 @@ class StackTraceImpl<system_tag::current_tag> : public StackTraceImplHolder {
     return size();
   }
 
+  void load_saved(void** arr, size_t sz) {
+    StackTraceImplBase::load_saved(arr, sz, _stacktrace);
+  }
+
   size_t load_from(void *addr, size_t depth = 32, void *context = nullptr,
                    void *error_addr = nullptr) {
     load_here(depth + 8, context, error_addr);
@@ -1103,6 +1113,10 @@ class StackTraceImpl<system_tag::current_tag> : public StackTraceImplHolder {
     return size();
   }
 
+  void load_saved(void** arr, size_t sz) {
+    StackTraceImplBase::load_saved(arr, sz, _stacktrace);
+  }
+
   size_t load_from(void *addr, size_t depth = 32, void *context = nullptr,
                    void *error_addr = nullptr) {
     load_here(depth + 8, context, error_addr);
@@ -1197,6 +1211,10 @@ class StackTraceImpl<system_tag::current_tag> : public StackTraceImplHolder {
     return size();
   }
 
+  void load_saved(void** arr, size_t sz) {
+    StackTraceImplBase::load_saved(arr, sz, _stacktrace);
+  }
+
   size_t load_from(void *addr, size_t depth = 32, void *context = nullptr,
                    void *error_addr = nullptr) {
     load_here(depth + 8, context, error_addr);