How Code Becomes a Running Process: Reading Path

About This Route

This route explains the bridge between a code-shaped file and a running instance.

Its central question is: given a source file or code artifact, what is the next execution target, and what must happen before runtime behavior exists?

That bridge matters because “code” can mean many different stored things: source text, bytecode, object files, native executables, scripts, packages, and runtime inputs. Those things do not all run in the same way. Each one is meant to be read by a specific next layer.

This route does not replace the deeper routes about bytes, C, Java, operating systems, or web requests. It gives the map that lets those series connect cleanly.

Contents

1. What Problem Does This Route Connect?
2. Source Files Are Inputs, Not Running Programs
3. Language Tools Turn Source Into Code Artifacts
4. Code Artifacts Have Different Execution Targets
5. Native Executables Need Loader and Process Context
6. Managed Runtimes Create Their Own Execution Layer
7. Processes Are Runtime Containers, Not Code Files
8. Final Mental Model: Code Artifact to Running Process

Reading Path

Read this route after How Bytes Become Files and Running Programs or after the opening chapters of What Does It Mean for Software to Run?.

Then use it as a bridge into:

• How C Runs
• How Java Runs on the JVM
• How Operating Systems Support Running Programs

What You Will Understand

After this route, you should be able to look at a code artifact and ask:

• Is this source text, an intermediate artifact, a native executable, or input to a managed runtime?
• What tool or runtime is supposed to read it next?
• Does the next step produce another stored artifact, start a process, or both?
• Which parts belong to language tooling, the operating system, the CPU, or a managed runtime?
• Why a file can exist without any running behavior.