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* [Tarantool-patches] [PATCH luajit v2] memprof: introduce cli flag to run dump parser
@ 2021-09-12 14:51 Maxim Kokryashkin via Tarantool-patches
  0 siblings, 0 replies; only message in thread
From: Maxim Kokryashkin via Tarantool-patches @ 2021-09-12 14:51 UTC (permalink / raw)
  To: tarantool-patches, imun, skaplun

It is really unconvinient to use a standalone shell script to parse
memprof dump. That is why this commit intoroduces a CLI flag for tools
to the LuaJIT, so now it is possible to parse memprof dump
as simple as:
```
luajit -tm memprof.bin
```

Closes tarantool/tarantool#5688
---
GitHub branch:
https://github.com/tarantool/luajit/tree/fckxorg/gh-5688-cli-for-memprof-parse

Issue:
https://github.com/tarantool/tarantool/issues/5688

Also, I am not sure whether it is ok to do that[1] trick with `argn` or
not. It seems reasonable to run tools using the `runargs` method, but
then the `argn` should be adjusted in a such way, that the
`createargtable` will save parameters for the tool and 'runargs' will
execute the script itself.

[1]: https://github.com/tarantool/luajit/blob/8c074ebe7336a27f15484f1bb7eff757fa92c2f4/src/luajit.c#L565

 CMakeLists.txt         |  9 ++++----
 src/CMakeLists.txt     |  5 +++++
 src/lj_tools_conf.h.in |  6 ++++++
 src/luajit.c           | 49 ++++++++++++++++++++++++++++++++----------
 tools/CMakeLists.txt   |  2 ++
 5 files changed, 56 insertions(+), 15 deletions(-)
 create mode 100644 src/lj_tools_conf.h.in

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5348e043..74826095 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -250,6 +250,11 @@ endif()
 # related compiler and linker flags passed. This should be done
 # the right way later.
 
+# --- Tools --------------------------------------------------------------------
+
+add_subdirectory(tools)
+set(LUAJIT_TOOLS_DIR "${LUAJIT_TOOLS_DIR}")
+
 # --- Main source tree ---------------------------------------------------------
 
 add_subdirectory(src)
@@ -258,10 +263,6 @@ add_subdirectory(src)
 
 add_subdirectory(etc)
 
-# --- Tools --------------------------------------------------------------------
-
-add_subdirectory(tools)
-
 # --- Testing source tree ------------------------------------------------------
 
 # Auxiliary options for testing.
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 809aac68..d9debccf 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -142,6 +142,8 @@ make_source_list(SOURCES_CORE_NO_JIT_FFI
     ${SOURCES_UTILS}
 )
 
+configure_file(${CMAKE_CURRENT_SOURCE_DIR}/lj_tools_conf.h.in ${CMAKE_CURRENT_SOURCE_DIR}/lj_tools_conf.h)
+
 set(SOURCES_CORE ${SOURCES_CORE_NO_JIT_FFI})
 
 # Build JIT sources if JIT support is enabled.
@@ -248,6 +250,9 @@ add_custom_target(
           jit/vmdef.lua
 )
 
+# --- Generate luajit tools config header -------------------------------------
+configure_file(${CMAKE_CURRENT_SOURCE_DIR}/lj_tools_conf.h.in ${CMAKE_CURRENT_SOURCE_DIR}/lj_tools_conf.h)
+
 # --- Generate core and VM object files ---------------------------------------
 
 # Virtual machine.
diff --git a/src/lj_tools_conf.h.in b/src/lj_tools_conf.h.in
new file mode 100644
index 00000000..366c3ec4
--- /dev/null
+++ b/src/lj_tools_conf.h.in
@@ -0,0 +1,6 @@
+#ifndef LJ_TOOLS_CONF_H
+#define LJ_TOOLS_CONF_H
+
+#define PARSER_PATH "@LUAJIT_TOOLS_DIR@/memprof.lua"
+
+#endif
diff --git a/src/luajit.c b/src/luajit.c
index 1ca24301..525797a5 100644
--- a/src/luajit.c
+++ b/src/luajit.c
@@ -19,6 +19,8 @@
 
 #include "lj_arch.h"
 
+#include "lj_tools_conf.h"
+
 #if LJ_TARGET_POSIX
 #include <unistd.h>
 #define lua_stdin_is_tty()	isatty(0)
@@ -72,6 +74,7 @@ static void print_usage(void)
   "  -O[opt]   Control LuaJIT optimizations.\n"
   "  -i        Enter interactive mode after executing " LUA_QL("script") ".\n"
   "  -v        Show version information.\n"
+  "  -t[cmd]   Execute tool.\n"
   "  -E        Ignore environment variables.\n"
   "  --        Stop handling options.\n"
   "  -         Execute stdin and stop handling options.\n", stderr);
@@ -266,21 +269,17 @@ static void dotty(lua_State *L)
   progname = oldprogname;
 }
 
-static int handle_script(lua_State *L, char **argx)
+static int call_script(lua_State *L, const char *fname)
 {
-  int status;
-  const char *fname = argx[0];
-  if (strcmp(fname, "-") == 0 && strcmp(argx[-1], "--") != 0)
-    fname = NULL;  /* stdin */
-  status = luaL_loadfile(L, fname);
+  int status = luaL_loadfile(L, fname);
   if (status == LUA_OK) {
     /* Fetch args from arg table. LUA_INIT or -e might have changed them. */
     int narg = 0;
     lua_getglobal(L, "arg");
     if (lua_istable(L, -1)) {
       do {
-	narg++;
-	lua_rawgeti(L, -narg, narg);
+	      narg++;
+	      lua_rawgeti(L, -narg, narg);
       } while (!lua_isnil(L, -1));
       lua_pop(L, 1);
       lua_remove(L, -narg);
@@ -290,6 +289,16 @@ static int handle_script(lua_State *L, char **argx)
     }
     status = docall(L, narg, 0);
   }
+  return status;
+}
+
+static int handle_script(lua_State *L, char **argx)
+{
+  int status;
+  const char *fname = argx[0];
+  if (strcmp(fname, "-") == 0 && strcmp(argx[-1], "--") != 0)
+    fname = NULL;  /* stdin */
+  status = call_script(L, fname);
   return report(L, status);
 }
 
@@ -361,6 +370,15 @@ static int dojitcmd(lua_State *L, const char *cmd)
   return runcmdopt(L, opt ? opt+1 : opt);
 }
 
+static int dotoolcmd(lua_State *L, const char *cmd)
+{
+  if(strcmp(cmd, "m") == 0) { 
+    const int status = call_script(L, PARSER_PATH);
+    return status == LUA_OK;
+  }
+  return -1;
+}
+
 /* Optimization flags. */
 static int dojitopt(lua_State *L, const char *opt)
 {
@@ -398,6 +416,7 @@ static int dobytecode(lua_State *L, char **argv)
 #define FLAGS_EXEC		4
 #define FLAGS_OPTION		8
 #define FLAGS_NOENV		16
+#define FLAGS_TOOL    32
 
 static int collectargs(char **argv, int *flags)
 {
@@ -419,14 +438,19 @@ static int collectargs(char **argv, int *flags)
       notail(argv[i]);
       *flags |= FLAGS_VERSION;
       break;
+    case 't':
+      *flags |= FLAGS_TOOL;
+      if (argv[i][2] == '\0') return -1;
+      if (argv[i + 1] == NULL) return -1;
+      return i + 1;
     case 'e':
       *flags |= FLAGS_EXEC;
     case 'j':  /* LuaJIT extension */
     case 'l':
       *flags |= FLAGS_OPTION;
       if (argv[i][2] == '\0') {
-	i++;
-	if (argv[i] == NULL) return -1;
+	      i++;
+        if (argv[i] == NULL) return -1;
       }
       break;
     case 'O': break;  /* LuaJIT extension */
@@ -474,6 +498,9 @@ static int runargs(lua_State *L, char **argv, int argn)
 	return 1;
       break;
       }
+    case 't' :
+      const char *cmd = argv[i] + 2;
+      return dotoolcmd(L, cmd) == LUA_OK;
     case 'O':  /* LuaJIT extension. */
       if (dojitopt(L, argv[i] + 2))
 	return 1;
@@ -535,7 +562,7 @@ static int pmain(lua_State *L)
   luaL_openlibs(L);
   lua_gc(L, LUA_GCRESTART, -1);
 
-  createargtable(L, argv, s->argc, argn);
+  createargtable(L, argv, s->argc, (flags & FLAGS_TOOL) ? argn - 1 : argn);
 
   if (!(flags & FLAGS_NOENV)) {
     s->status = handle_luainit(L);
diff --git a/tools/CMakeLists.txt b/tools/CMakeLists.txt
index 61830e44..84129153 100644
--- a/tools/CMakeLists.txt
+++ b/tools/CMakeLists.txt
@@ -16,6 +16,7 @@ else()
   # path where LuaJIT binary is located.
   set(LUAJIT_TOOLS_BIN ${LUAJIT_BINARY_DIR}/${LUAJIT_CLI_NAME})
   set(LUAJIT_TOOLS_DIR ${CMAKE_CURRENT_SOURCE_DIR})
+  set(LUAJIT_TOOLS_DIR ${LUAJIT_TOOLS_DIR} PARENT_SCOPE)
   # XXX: Unfortunately, there is no convenient way to set
   # particular permissions to the output file via CMake.
   # Furthermore, I even failed to copy the given file to the same
@@ -75,6 +76,7 @@ else()
     "
       set(LUAJIT_TOOLS_BIN ${CMAKE_INSTALL_PREFIX}/bin/${LUAJIT_CLI_NAME})
       set(LUAJIT_TOOLS_DIR ${CMAKE_INSTALL_PREFIX}/${LUAJIT_DATAROOTDIR})
+      set(LUAJIT_TOOLS_DIR ${LUAJIT_TOOLS_DIR} PARENT_SCOPE)
       configure_file(${CMAKE_CURRENT_SOURCE_DIR}/luajit-parse-memprof.in
         ${PROJECT_BINARY_DIR}/luajit-parse-memprof @ONLY ESCAPE_QUOTES)
       file(INSTALL ${PROJECT_BINARY_DIR}/luajit-parse-memprof
-- 
2.33.0


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