nodejs: start sketch

README.adoc

@@ -1108,7 +1108,7 @@ sudo apt-get install gcc-aarch64-linux-gnu qemu-system-aarch64
   --arch aarch64 \
   --qemu-which host \
   --userland-build-id host \
-  --userland userland/c/print_argv.c \
+  --userland userland/c/command_line_arguments.c \
   --userland-args 'asdf "qw er"' \
 ;
 ....
@@ -1142,7 +1142,7 @@ and <<user-mode-gdb>>:
   --gcc-which host \
   --qemu-which host \
   --userland-build-id host \
-  --userland userland/c/print_argv.c \
+  --userland userland/c/command_line_arguments.c \
   --userland-args 'asdf "qw er"' \
 ;
 ....
@@ -2646,7 +2646,7 @@ Source: link:rootfs_overlay/lkmc/gdbserver.sh[].
 And on host:
 
 ....
-./run-gdb --gdbserver --userland userland/c/print_argv.c main
+./run-gdb --gdbserver --userland userland/c/command_line_arguments.c main
 ....
 
 or alternatively with the path to the executable itself:
@@ -3584,12 +3584,12 @@ See also: xref:user-mode-simulation-with-glibc[xrefstyle=full]
 
 === QEMU user mode getting started
 
-Let's run link:userland/c/print_argv.c[] built with the Buildroot toolchain on QEMU user mode:
+Let's run link:userland/c/command_line_arguments.c[] built with the Buildroot toolchain on QEMU user mode:
 
 ....
 ./build user-mode-qemu
 ./run \
-  --userland userland/c/print_argv.c \
+  --userland userland/c/command_line_arguments.c \
   --userland-args='asdf "qw er"' \
 ;
 ....
@@ -3620,7 +3620,7 @@ It's nice when <<gdb,the obvious>> just works, right?
 ./run \
   --arch aarch64 \
   --gdb-wait \
-  --userland userland/c/print_argv.c \
+  --userland userland/c/command_line_arguments.c \
   --userland-args 'asdf "qw er"' \
 ;
 ....
@@ -3630,7 +3630,7 @@ and on another shell:
 ....
 ./run-gdb \
   --arch aarch64 \
-  --userland userland/c/print_argv.c \
+  --userland userland/c/command_line_arguments.c \
   main \
 ;
 ....
@@ -3641,7 +3641,7 @@ Or alternatively, if you are using <<tmux>>, do everything in one go with:
 ./run \
   --arch aarch64 \
   --gdb \
-  --userland userland/c/print_argv.c \
+  --userland userland/c/command_line_arguments.c \
   --userland-args 'asdf "qw er"' \
 ;
 ....
@@ -3793,7 +3793,7 @@ Example:
 ./run \
   --arch aarch64 \
   --static \
-  --userland userland/c/print_argv.c \
+  --userland userland/c/command_line_arguments.c \
   --userland-args 'asdf "qw er"' \
 ;
 ....
@@ -3879,7 +3879,7 @@ So let's just play with some static ones:
 ./run \
   --arch aarch64 \
   --emulator gem5 \
-  --userland userland/c/print_argv.c \
+  --userland userland/c/command_line_arguments.c \
   --userland-args 'asdf "qw er"' \
 ;
 ....
@@ -3894,14 +3894,14 @@ TODO: how to escape spaces on the command line arguments?
   --emulator gem5 \
   --gdb-wait \
   --static \
-  --userland userland/c/print_argv.c \
+  --userland userland/c/command_line_arguments.c \
   --userland-args 'asdf "qw er"' \
 ;
 ./run-gdb \
   --arch aarch64 \
   --emulator gem5 \
   --static \
-  --userland userland/c/print_argv.c \
+  --userland userland/c/command_line_arguments.c \
   main \
 ;
 ....
@@ -12854,7 +12854,7 @@ Programs under link:userland/c/[] are examples of https://en.wikipedia.org/wiki/
 ** link:userland/c/exit0.c[]
 ** link:userland/c/exit1.c[]
 ** link:userland/c/exit2.c[]
-** link:userland/c/print_argv.c[]
+** link:userland/c/command_line_arguments.c[]
 * Standard library
 ** `assert.h`
 *** link:userland/c/assert_fail.c[]
@@ -13164,6 +13164,33 @@ How to debug: https://stackoverflow.com/questions/6261201/how-to-find-memory-lea
 
 Example: link:userland/c/memory_leak.c[]
 
+=== Interpreted languages
+
+Maybe some day someone will use this setup to study the performance of interpreters:
+
+* <<node-js>>
+
+=== Node.js
+
+Parent section: <<interpreted-languages>>.
+
+Install the interpreter with:
+
+....
+./build-buildroot --config 'BR2_PACKAGE_NODEJS=y'
+....
+
+TODO: broken as of 3c3deb14dc8d6511680595dc42cb627d5781746d + 1:
+
+....
+ERROR: package host-nodejs installs executables without proper RPATH
+....
+
+Examples:
+
+* process
+** link:rootfs_overlay/lkmc/nodejs/command_line_arguments.js[]
+
 === Userland content bibliography
 
 * The Linux Programming Interface by Michael Kerrisk https://www.amazon.co.uk/Linux-Programming-Interface-System-Handbook/dp/1593272200 Lots of open source POSIX examples: https://github.com/cirosantilli/linux-programming-interface-kerrisk

rootfs_overlay/lkmc/nodejs/command_line_arguments.js

@@ -0,0 +1,5 @@
+#!/usr/bin/env node
+
+for (const arg of process.argv) {
+  console.log(arg);
+}