diff --git a/lldb/include/lldb/Core/Section.h b/lldb/include/lldb/Core/Section.h
--- a/lldb/include/lldb/Core/Section.h
+++ b/lldb/include/lldb/Core/Section.h
@@ -236,6 +236,8 @@
 
   void SetIsRelocated(bool b) { m_relocated = b; }
 
+  bool IsReadOnly();
+
 protected:
   ObjectFile *m_obj_file;   // The object file that data for this section should
                             // be read from
diff --git a/lldb/include/lldb/Target/Target.h b/lldb/include/lldb/Target/Target.h
--- a/lldb/include/lldb/Target/Target.h
+++ b/lldb/include/lldb/Target/Target.h
@@ -229,6 +229,10 @@
 
   bool GetDebugUtilityExpression() const;
 
+  void SetVerifyFileCacheMemoryReads(bool debug);
+
+  bool GetVerifyFileCacheMemoryReads() const;
+
 private:
   // Callbacks for m_launch_info.
   void Arg0ValueChangedCallback();
diff --git a/lldb/packages/Python/lldbsuite/test/lldbtest.py b/lldb/packages/Python/lldbsuite/test/lldbtest.py
--- a/lldb/packages/Python/lldbsuite/test/lldbtest.py
+++ b/lldb/packages/Python/lldbsuite/test/lldbtest.py
@@ -798,6 +798,9 @@
             'settings set symbols.clang-modules-cache-path "{}"'.format(
                 configuration.lldb_module_cache_dir),
             "settings set use-color false",
+            
+            # Verify that file cache and live memory always match.
+            "settings set target.verify-file-cache-memory-reads true",
         ]
 
         # Set any user-overridden settings.
diff --git a/lldb/source/Core/Section.cpp b/lldb/source/Core/Section.cpp
--- a/lldb/source/Core/Section.cpp
+++ b/lldb/source/Core/Section.cpp
@@ -599,3 +599,9 @@
   }
   return count;
 }
+
+bool Section::IsReadOnly() {
+  auto permissions = Flags(GetPermissions());
+  return !permissions.Test(ePermissionsWritable) &&
+         permissions.Test(ePermissionsReadable);
+}
diff --git a/lldb/source/Target/Target.cpp b/lldb/source/Target/Target.cpp
--- a/lldb/source/Target/Target.cpp
+++ b/lldb/source/Target/Target.cpp
@@ -1761,21 +1761,34 @@
   // Read from file cache if read-only section.
   if (!force_live_memory && resolved_addr.IsSectionOffset()) {
     SectionSP section_sp(resolved_addr.GetSection());
-    if (section_sp) {
-      auto permissions = Flags(section_sp->GetPermissions());
-      bool is_readonly = !permissions.Test(ePermissionsWritable) &&
-                         permissions.Test(ePermissionsReadable);
-      if (is_readonly) {
-        file_cache_bytes_read =
-            ReadMemoryFromFileCache(resolved_addr, dst, dst_len, error);
-        if (file_cache_bytes_read == dst_len)
-          return file_cache_bytes_read;
-        else if (file_cache_bytes_read > 0) {
-          file_cache_read_buffer =
-              std::make_unique<uint8_t[]>(file_cache_bytes_read);
-          std::memcpy(file_cache_read_buffer.get(), dst, file_cache_bytes_read);
+    if (section_sp && section_sp->IsReadOnly()) {
+      file_cache_bytes_read =
+          ReadMemoryFromFileCache(resolved_addr, dst, dst_len, error);
+
+      if (GetVerifyFileCacheMemoryReads()) {
+        if (ProcessIsValid() && file_cache_bytes_read == dst_len) {
+          if (load_addr == LLDB_INVALID_ADDRESS)
+            load_addr = resolved_addr.GetLoadAddress(this);
+          if (load_addr != LLDB_INVALID_ADDRESS) {
+            std::unique_ptr<uint8_t[]> live_buf =
+                std::make_unique<uint8_t[]>(dst_len);
+            bytes_read = m_process_sp->ReadMemory(load_addr, live_buf.get(),
+                                                  dst_len, error);
+            if (bytes_read == dst_len) {
+              lldbassert(memcmp(live_buf.get(), dst, dst_len) == 0 &&
+                         "File cache and live memory diverge!");
+            }
+          }
         }
       }
+
+      if (file_cache_bytes_read == dst_len)
+        return file_cache_bytes_read;
+      if (file_cache_bytes_read > 0) {
+        file_cache_read_buffer =
+            std::make_unique<uint8_t[]>(file_cache_bytes_read);
+        std::memcpy(file_cache_read_buffer.get(), dst, file_cache_bytes_read);
+      }
     }
   }
 
@@ -4368,6 +4381,17 @@
   m_collection_sp->SetPropertyAtIndexAsBoolean(nullptr, idx, debug);
 }
 
+bool TargetProperties::GetVerifyFileCacheMemoryReads() const {
+  const uint32_t idx = ePropertyVerifyFileCacheMemoryReads;
+  return m_collection_sp->GetPropertyAtIndexAsBoolean(
+      nullptr, idx, g_target_properties[idx].default_uint_value != 0);
+}
+
+void TargetProperties::SetVerifyFileCacheMemoryReads(bool verify) {
+  const uint32_t idx = ePropertyVerifyFileCacheMemoryReads;
+  m_collection_sp->SetPropertyAtIndexAsBoolean(nullptr, idx, verify);
+}
+
 // Target::TargetEventData
 
 Target::TargetEventData::TargetEventData(const lldb::TargetSP &target_sp)
diff --git a/lldb/source/Target/TargetProperties.td b/lldb/source/Target/TargetProperties.td
--- a/lldb/source/Target/TargetProperties.td
+++ b/lldb/source/Target/TargetProperties.td
@@ -175,6 +175,9 @@
   def DebugUtilityExpression: Property<"debug-utility-expression", "Boolean">,
     DefaultFalse,
     Desc<"Enable debugging of LLDB-internal utility expressions.">;
+  def VerifyFileCacheMemoryReads: Property<"verify-file-cache-memory-reads", "Boolean">,
+    DefaultFalse,
+    Desc<"Verify that memory read from the file-cache is identical to the memory read from the process.">;
 }
 
 let Definition = "process_experimental" in {