perf: Remove libpython support and legacy Python scripts

Remove embedded Python interpreter support (libpython) from perf, as
all Python scripts have been migrated to standalone scripts using the
perf Python extension module.

Changes include:
- Remove libpython detection and build flags from Makefile.config.
- Remove legacy Python script installation rules from Makefile.perf.
- Delete tools/perf/util/scripting-engines/trace-event-python.c and
  tools/perf/scripts/python/Perf-Trace-Util/Context.c.
- Remove Python scripting engine registration from
  trace-event-scripting.c.
- Remove libpython from the supported features list in builtin-check.c
  and Documentation/perf-check.txt.
- Delete the legacy Python scripts and bin wrappers in
  tools/perf/scripts/python/ and update shell tests.

Assisted-by: Antigravity:gemini-3.1-pro
Signed-off-by: Ian Rogers <irogers@google.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 0 insertions, 267 deletions

diff --git a/tools/perf/scripts/python/flamegraph.py b/tools/perf/scripts/python/flamegraph.py
deleted file mode 100755
index ad735990c5be..000000000000
--- a/tools/perf/scripts/python/flamegraph.py
+++ /dev/null
@@ -1,267 +0,0 @@
-# flamegraph.py - create flame graphs from perf samples
-# SPDX-License-Identifier: GPL-2.0
-#
-# Usage:
-#
-#     perf record -a -g -F 99 sleep 60
-#     perf script report flamegraph
-#
-# Combined:
-#
-#     perf script flamegraph -a -F 99 sleep 60
-#
-# Written by Andreas Gerstmayr <agerstmayr@redhat.com>
-# Flame Graphs invented by Brendan Gregg <bgregg@netflix.com>
-# Works in tandem with d3-flame-graph by Martin Spier <mspier@netflix.com>
-#
-# pylint: disable=missing-module-docstring
-# pylint: disable=missing-class-docstring
-# pylint: disable=missing-function-docstring
-
-import argparse
-import hashlib
-import io
-import json
-import os
-import subprocess
-import sys
-from typing import Dict, Optional, Union
-import urllib.request
-
-MINIMAL_HTML = """<head>
-  <link rel="stylesheet" type="text/css" href="https://cdn.jsdelivr.net/npm/d3-flame-graph@4.1.3/dist/d3-flamegraph.css">
-</head>
-<body>
-  <div id="chart"></div>
-  <script type="text/javascript" src="https://d3js.org/d3.v7.js"></script>
-  <script type="text/javascript" src="https://cdn.jsdelivr.net/npm/d3-flame-graph@4.1.3/dist/d3-flamegraph.min.js"></script>
-  <script type="text/javascript">
-  const stacks = [/** @flamegraph_json **/];
-  // Note, options is unused.
-  const options = [/** @options_json **/];
-
-  var chart = flamegraph();
-  d3.select("#chart")
-        .datum(stacks[0])
-        .call(chart);
-  </script>
-</body>
-"""
-
-# pylint: disable=too-few-public-methods
-class Node:
-    def __init__(self, name: str, libtype: str):
-        self.name = name
-        # "root" | "kernel" | ""
-        # "" indicates user space
-        self.libtype = libtype
-        self.value: int = 0
-        self.children: list[Node] = []
-
-    def to_json(self) -> Dict[str, Union[str, int, list[Dict]]]:
-        return {
-            "n": self.name,
-            "l": self.libtype,
-            "v": self.value,
-            "c": [x.to_json() for x in self.children]
-        }
-
-
-class FlameGraphCLI:
-    def __init__(self, args):
-        self.args = args
-        self.stack = Node("all", "root")
-
-    @staticmethod
-    def get_libtype_from_dso(dso: Optional[str]) -> str:
-        """
-        when kernel-debuginfo is installed,
-        dso points to /usr/lib/debug/lib/modules/*/vmlinux
-        """
-        if dso and (dso == "[kernel.kallsyms]" or dso.endswith("/vmlinux")):
-            return "kernel"
-
-        return ""
-
-    @staticmethod
-    def find_or_create_node(node: Node, name: str, libtype: str) -> Node:
-        for child in node.children:
-            if child.name == name:
-                return child
-
-        child = Node(name, libtype)
-        node.children.append(child)
-        return child
-
-    def process_event(self, event) -> None:
-        # ignore events where the event name does not match
-        # the one specified by the user
-        if self.args.event_name and event.get("ev_name") != self.args.event_name:
-            return
-
-        pid = event.get("sample", {}).get("pid", 0)
-        # event["dso"] sometimes contains /usr/lib/debug/lib/modules/*/vmlinux
-        # for user-space processes; let's use pid for kernel or user-space distinction
-        if pid == 0:
-            comm = event["comm"]
-            libtype = "kernel"
-        else:
-            comm = f"{event['comm']} ({pid})"
-            libtype = ""
-        node = self.find_or_create_node(self.stack, comm, libtype)
-
-        if "callchain" in event:
-            for entry in reversed(event["callchain"]):
-                name = entry.get("sym", {}).get("name", "[unknown]")
-                libtype = self.get_libtype_from_dso(entry.get("dso"))
-                node = self.find_or_create_node(node, name, libtype)
-        else:
-            name = event.get("symbol", "[unknown]")
-            libtype = self.get_libtype_from_dso(event.get("dso"))
-            node = self.find_or_create_node(node, name, libtype)
-        node.value += 1
-
-    def get_report_header(self) -> str:
-        if self.args.input == "-":
-            # when this script is invoked with "perf script flamegraph",
-            # no perf.data is created and we cannot read the header of it
-            return ""
-
-        try:
-            # if the file name other than perf.data is given,
-            # we read the header of that file
-            if self.args.input:
-                output = subprocess.check_output(["perf", "report", "--header-only",
-                                                  "-i", self.args.input])
-            else:
-                output = subprocess.check_output(["perf", "report", "--header-only"])
-
-            result = output.decode("utf-8")
-            if self.args.event_name:
-                result += "\nFocused event: " + self.args.event_name
-            return result
-        except Exception as err:  # pylint: disable=broad-except
-            print(f"Error reading report header: {err}", file=sys.stderr)
-            return ""
-
-    def trace_end(self) -> None:
-        stacks_json = json.dumps(self.stack, default=lambda x: x.to_json())
-
-        if self.args.format == "html":
-            report_header = self.get_report_header()
-            options = {
-                "colorscheme": self.args.colorscheme,
-                "context": report_header
-            }
-            options_json = json.dumps(options)
-
-            template_md5sum = None
-            if self.args.format == "html":
-                if os.path.isfile(self.args.template):
-                    template = f"file://{self.args.template}"
-                else:
-                    if not self.args.allow_download:
-                        print(f"""Warning: Flame Graph template '{self.args.template}'
-does not exist. To avoid this please install a package such as the
-js-d3-flame-graph or libjs-d3-flame-graph, specify an existing flame
-graph template (--template PATH) or use another output format (--format
-FORMAT).""",
-                              file=sys.stderr)
-                        if self.args.input == "-":
-                            print(
-"""Not attempting to download Flame Graph template as script command line
-input is disabled due to using live mode. If you want to download the
-template retry without live mode. For example, use 'perf record -a -g
--F 99 sleep 60' and 'perf script report flamegraph'. Alternatively,
-download the template from:
-https://cdn.jsdelivr.net/npm/d3-flame-graph@4.1.3/dist/templates/d3-flamegraph-base.html
-and place it at:
-/usr/share/d3-flame-graph/d3-flamegraph-base.html""",
-                                  file=sys.stderr)
-                            sys.exit(1)
-                        s = None
-                        while s not in ["y", "n"]:
-                            s = input("Do you wish to download a template from cdn.jsdelivr.net?" +
-                                      "(this warning can be suppressed with --allow-download) [yn] "
-                                      ).lower()
-                        if s == "n":
-                            sys.exit(1)
-                    template = ("https://cdn.jsdelivr.net/npm/d3-flame-graph@4.1.3/dist/templates/"
-                                "d3-flamegraph-base.html")
-                    template_md5sum = "143e0d06ba69b8370b9848dcd6ae3f36"
-
-            try:
-                with urllib.request.urlopen(template) as url_template:
-                    output_str = "".join([
-                        l.decode("utf-8") for l in url_template.readlines()
-                    ])
-            except Exception as err:
-                print(f"Error reading template {template}: {err}\n"
-                      "a minimal flame graph will be generated", file=sys.stderr)
-                output_str = MINIMAL_HTML
-                template_md5sum = None
-
-            if template_md5sum:
-                download_md5sum = hashlib.md5(output_str.encode("utf-8")).hexdigest()
-                if download_md5sum != template_md5sum:
-                    s = None
-                    while s not in ["y", "n"]:
-                        s = input(f"""Unexpected template md5sum.
-{download_md5sum} != {template_md5sum}, for:
-{output_str}
-continue?[yn] """).lower()
-                    if s == "n":
-                        sys.exit(1)
-
-            output_str = output_str.replace("/** @options_json **/", options_json)
-            output_str = output_str.replace("/** @flamegraph_json **/", stacks_json)
-
-            output_fn = self.args.output or "flamegraph.html"
-        else:
-            output_str = stacks_json
-            output_fn = self.args.output or "stacks.json"
-
-        if output_fn == "-":
-            with io.open(sys.stdout.fileno(), "w", encoding="utf-8", closefd=False) as out:
-                out.write(output_str)
-        else:
-            print(f"dumping data to {output_fn}")
-            try:
-                with io.open(output_fn, "w", encoding="utf-8") as out:
-                    out.write(output_str)
-            except IOError as err:
-                print(f"Error writing output file: {err}", file=sys.stderr)
-                sys.exit(1)
-
-
-if __name__ == "__main__":
-    parser = argparse.ArgumentParser(description="Create flame graphs.")
-    parser.add_argument("-f", "--format",
-                        default="html", choices=["json", "html"],
-                        help="output file format")
-    parser.add_argument("-o", "--output",
-                        help="output file name")
-    parser.add_argument("--template",
-                        default="/usr/share/d3-flame-graph/d3-flamegraph-base.html",
-                        help="path to flame graph HTML template")
-    parser.add_argument("--colorscheme",
-                        default="blue-green",
-                        help="flame graph color scheme",
-                        choices=["blue-green", "orange"])
-    parser.add_argument("-i", "--input",
-                        help=argparse.SUPPRESS)
-    parser.add_argument("--allow-download",
-                        default=False,
-                        action="store_true",
-                        help="allow unprompted downloading of HTML template")
-    parser.add_argument("-e", "--event",
-                        default="",
-                        dest="event_name",
-                        type=str,
-                        help="specify the event to generate flamegraph for")
-
-    cli_args = parser.parse_args()
-    cli = FlameGraphCLI(cli_args)
-
-    process_event = cli.process_event
-    trace_end = cli.trace_end