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From fc72365ad7a3fb66902b3e2d0b0fb712eb8735d3 Mon Sep 17 00:00:00 2001
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From: Jerome Marchand <jmarchan@redhat.com>
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Date: Wed, 10 Jun 2020 18:29:11 +0200
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Subject: [PATCH 4/4] tools: fix a python 3 map issue in dbstat and dbslower
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In python 3, map returns an iterator and not a list anymore. This
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patch cast the map into a list. It fixes the following error:
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$ /usr/share/bcc/tools/dbstat mysql
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Traceback (most recent call last):
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File "/usr/share/bcc/tools/dbstat", line 95, in <module>
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bpf = BPF(text=program, usdt_contexts=usdts)
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File "/usr/lib/python3.6/site-packages/bcc/__init__.py", line 339, in __init__
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ctx_array = (ct.c_void_p * len(usdt_contexts))()
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TypeError: object of type 'map' has no len()
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---
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tools/dbslower.py | 2 +-
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tools/dbstat.py | 2 +-
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2 files changed, 2 insertions(+), 2 deletions(-)
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diff --git a/tools/dbslower.py b/tools/dbslower.py
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index 2f1b6a8b..e2ee7ad0 100755
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--- a/tools/dbslower.py
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+++ b/tools/dbslower.py
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@@ -188,7 +188,7 @@ int query_end(struct pt_regs *ctx) {
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args.pids = map(int, subprocess.check_output(
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"pidof postgres".split()).split())
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- usdts = map(lambda pid: USDT(pid=pid), args.pids)
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+ usdts = list(map(lambda pid: USDT(pid=pid), args.pids))
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for usdt in usdts:
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usdt.enable_probe("query__start", "query_start")
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usdt.enable_probe("query__done", "query_end")
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diff --git a/tools/dbstat.py b/tools/dbstat.py
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index a89b0971..a7d301b1 100755
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--- a/tools/dbstat.py
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+++ b/tools/dbstat.py
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@@ -83,7 +83,7 @@ program = program.replace("SCALE", str(1000 if args.microseconds else 1000000))
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program = program.replace("FILTER", "" if args.threshold == 0 else
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"if (delta / 1000000 < %d) { return 0; }" % args.threshold)
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-usdts = map(lambda pid: USDT(pid=pid), args.pids)
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+usdts = list(map(lambda pid: USDT(pid=pid), args.pids))
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for usdt in usdts:
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usdt.enable_probe("query__start", "probe_start")
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usdt.enable_probe("query__done", "probe_end")
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--
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2.25.4
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