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From: Mikhail Shishatskiy via Tarantool-patches <tarantool-patches@dev.tarantool.org>
To: tarantool-patches@dev.tarantool.org, imun@tarantool.org,
	skaplun@tarantool.org
Subject: [Tarantool-patches] [PATCH luajit v4 2/4] memprof: refactor location parsing
Date: Wed, 29 Sep 2021 23:07:56 +0300
Message-ID: <20210929200758.149446-3-m.shishatskiy@tarantool.org> (raw)
In-Reply-To: <20210929200758.149446-1-m.shishatskiy@tarantool.org>

As it is hard to keep function `id_location` easily usable in the
function `parse_location` with a growing number of fields in the
<loc> table, the code is refactored to make it more understandable.

The API of <utils/symtab.lua> module changed with adding a function
`id(loc)` returning the same id-string, as `id_location` did. This
function is useful to "stringify" the location and use it as a key
in the key/value storage.

Part of tarantool/tarantool#5814
---

Issue: https://github.com/tarantool/tarantool/issues/5814
Branch: https://github.com/tarantool/luajit/tree/shishqa/gh-5814-group-allocations-on-trace-by-trace-number
CI: https://github.com/tarantool/tarantool/tree/shishqa/gh-5814-group-allocations-on-trace-by-trace-number

 tools/memprof/parse.lua | 26 +++++++++++++-------------
 tools/utils/symtab.lua  |  4 ++++
 2 files changed, 17 insertions(+), 13 deletions(-)

diff --git a/tools/memprof/parse.lua b/tools/memprof/parse.lua
index 12e2758f..34ff8aef 100644
--- a/tools/memprof/parse.lua
+++ b/tools/memprof/parse.lua
@@ -8,6 +8,8 @@ local bit = require "bit"
 local band = bit.band
 local lshift = bit.lshift
 
+local symtab = require "utils.symtab"
+
 local string_format = string.format
 
 local LJM_MAGIC = "ljm"
@@ -59,22 +61,20 @@ local function link_to_previous(heap_chunk, e, nsize)
   end
 end
 
-local function id_location(addr, line)
-  return string_format("f%#xl%d", addr, line), {
-    addr = addr,
-    line = line,
-  }
-end
-
 local function parse_location(reader, asource)
-  if asource == ASOURCE_INT then
-    return id_location(0, 0)
-  elseif asource == ASOURCE_CFUNC then
-    return id_location(reader:read_uleb128(), 0)
+  local loc = {
+    addr = 0,
+    line = 0,
+  }
+  if asource == ASOURCE_CFUNC then
+    loc.addr = reader:read_uleb128()
   elseif asource == ASOURCE_LFUNC then
-    return id_location(reader:read_uleb128(), reader:read_uleb128())
+    loc.addr = reader:read_uleb128()
+    loc.line = reader:read_uleb128()
+  elseif asource ~= ASOURCE_INT then
+    error("Unknown asource "..asource)
   end
-  error("Unknown asource "..asource)
+  return symtab.id(loc), loc
 end
 
 local function parse_alloc(reader, asource, events, heap)
diff --git a/tools/utils/symtab.lua b/tools/utils/symtab.lua
index 3ed1dd13..e01daa62 100644
--- a/tools/utils/symtab.lua
+++ b/tools/utils/symtab.lua
@@ -73,6 +73,10 @@ function M.parse(reader)
   return symtab
 end
 
+function M.id(loc)
+  return string_format("f%#xl%d", loc.addr, loc.line)
+end
+
 function M.demangle(symtab, loc)
   local addr = loc.addr
 
-- 
2.33.0


  parent reply	other threads:[~2021-09-29 20:09 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-20  7:05 [Tarantool-patches] [PATCH luajit v3 0/4] memprof: group allocations on traces by trace number Mikhail Shishatskiy via Tarantool-patches
2021-08-20  7:05 ` [Tarantool-patches] [PATCH luajit v3 1/5] core: add const to lj_debug_line proto parameter Mikhail Shishatskiy via Tarantool-patches
2021-09-16 15:29   ` Igor Munkin via Tarantool-patches
2021-08-20  7:05 ` [Tarantool-patches] [PATCH luajit v3 2/5] test: separate memprof Lua API tests into subtests Mikhail Shishatskiy via Tarantool-patches
2021-09-16 15:29   ` Igor Munkin via Tarantool-patches
2021-08-20  7:05 ` [Tarantool-patches] [PATCH luajit v3 3/5] memprof: dump traceno if allocate from trace Mikhail Shishatskiy via Tarantool-patches
2021-09-16 15:32   ` Igor Munkin via Tarantool-patches
2021-09-29 19:21     ` Mikhail Shishatskiy via Tarantool-patches
2021-08-20  7:05 ` [Tarantool-patches] [PATCH luajit v3 4/5] memprof: extend symtab with info about traces Mikhail Shishatskiy via Tarantool-patches
2021-09-16 15:32   ` Igor Munkin via Tarantool-patches
2021-09-29 19:21     ` Mikhail Shishatskiy via Tarantool-patches
2021-08-20  7:05 ` [Tarantool-patches] [PATCH luajit v3 5/5] luajit: change order of modules Mikhail Shishatskiy via Tarantool-patches
2021-09-16 15:32   ` Igor Munkin via Tarantool-patches
2021-09-29 20:07 ` [Tarantool-patches] [PATCH luajit v4 0/4] memprof: group allocations on traces by traceno Mikhail Shishatskiy via Tarantool-patches
2021-09-29 20:07   ` [Tarantool-patches] [PATCH luajit v4 1/4] test: separate memprof Lua API tests into subtests Mikhail Shishatskiy via Tarantool-patches
2021-10-27 13:56     ` Igor Munkin via Tarantool-patches
2021-10-27 15:07     ` Sergey Kaplun via Tarantool-patches
2021-09-29 20:07   ` Mikhail Shishatskiy via Tarantool-patches [this message]
2021-10-27 13:56     ` [Tarantool-patches] [PATCH luajit v4 2/4] memprof: refactor location parsing Igor Munkin via Tarantool-patches
     [not found]       ` <20211104130010.mcvnra6e4yl5moo2@surf.localdomain>
2021-11-10 15:38         ` Igor Munkin via Tarantool-patches
2021-09-29 20:07   ` [Tarantool-patches] [PATCH luajit v4 3/4] memprof: group allocations on traces by traceno Mikhail Shishatskiy via Tarantool-patches
2021-10-27 13:56     ` Igor Munkin via Tarantool-patches
     [not found]       ` <20211104130156.f2botlihlfhwd3yh@surf.localdomain>
2021-11-11 15:34         ` Igor Munkin via Tarantool-patches
2021-09-29 20:07   ` [Tarantool-patches] [PATCH luajit v4 4/4] memprof: add info about trace start to symtab Mikhail Shishatskiy via Tarantool-patches
2021-11-01 16:31     ` Igor Munkin via Tarantool-patches
     [not found]       ` <20211104130228.x6qcne5xeh544hm7@surf.localdomain>
2021-11-12 13:34         ` Igor Munkin via Tarantool-patches
2021-11-17  8:17           ` Sergey Kaplun via Tarantool-patches
2021-11-22 15:11           ` Mikhail Shishatskiy via Tarantool-patches
2021-11-24 12:42             ` Mikhail Shishatskiy via Tarantool-patches
2021-11-24 16:44             ` Igor Munkin via Tarantool-patches

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