new port: java/lightweight-java-profiler

A port of the lightweight-java-profiler (ljp). ljp acts as a bare-bones agentlib to produce profiling stacks that can be digested, e.g., by Brendan Gregg's flamegraph scripts.

Reviewed by:	mat, swills (mentor)
Approved by:	swills (mentor)
Differential Revision:	https://reviews.freebsd.org/D10194

4 files changed, 95 insertions, 0 deletions

diff --git a/java/lightweight-java-profiler/files/patch-Makefile b/java/lightweight-java-profiler/files/patch-Makefile
new file mode 100644
index 000000000000..d492da56611c
--- /dev/null
+++ b/java/lightweight-java-profiler/files/patch-Makefile
@@ -0,0 +1,41 @@
+--- Makefile.orig	2017-03-31 01:58:22 UTC
++++ Makefile
+@@ -1,7 +1,7 @@
+-SHELL:=/bin/bash
++SHELL:=/usr/bin/env bash
+ UNAME:=$(shell uname | tr '[A-Z]' '[a-z]')
+ 
+-BITS?=32
++#BITS?=32
+ ifeq ($(UNAME), darwin)
+   READLINK_ARGS:=""
+   PLATFORM_WARNINGS:=-Weverything -Wno-c++98-compat-pedantic -Wno-padded \
+@@ -23,6 +23,13 @@ else ifeq ($(UNAME), linux)
+   HEADERS:=include
+   CC=g++
+   LDFLAGS=-Wl,--fatal-warnings
++else ifeq ($(UNAME), freebsd)
++  READLINK_ARGS:=""
++  PLATFORM_WARNINGS:=-Weverything -Wno-c++98-compat-pedantic -Wno-padded \
++        -Wno-missing-prototypes
++  PLATFORM_COPTS:=-std=c++11
++  HEADERS:=include
++  LDFLAGS=-Wl,-fatal_warnings
+ endif
+ 
+ JAVA_HOME := $(shell \
+@@ -32,11 +39,11 @@ JAVA_HOME := $(shell \
+ 	[[ -n "$${JAVA_HOME}" ]] || (echo "Cannot find JAVA_HOME" && exit) ; \
+ 	echo $${JAVA_HOME})
+ AGENT=liblagent.so
+-LIBS=-ldl
+-BUILD_DIR ?= $(shell mkdir build-$(BITS) 2> /dev/null ; echo build-$(BITS))
++LIBS=-lc
++BUILD_DIR ?= $(shell mkdir build 2> /dev/null ; echo build)
+ SRC_DIR:=${PWD}/src
+ OPT?=-O2
+-GLOBAL_WARNINGS=-Wall -Werror -Wformat-security -Wno-char-subscripts \
++GLOBAL_WARNINGS=-Wall -Wformat-security -Wno-char-subscripts \
+ 	-Wno-sign-compare -Wno-strict-overflow -Wwrite-strings -Wnon-virtual-dtor \
+ 	-Woverloaded-virtual
+ GLOBAL_COPTS=-fdiagnostics-show-option -fno-exceptions \
diff --git a/java/lightweight-java-profiler/files/patch-src_display.cc b/java/lightweight-java-profiler/files/patch-src_display.cc
new file mode 100644
index 000000000000..b01d0400482b
--- /dev/null
+++ b/java/lightweight-java-profiler/files/patch-src_display.cc
@@ -0,0 +1,11 @@
+--- src/display.cc.orig	2015-04-15 08:00:23 UTC
++++ src/display.cc
+@@ -20,7 +20,7 @@ void StackTracesPrinter::PrintStackTrace
+     if (traces[i].count != 0) {
+       total += traces[i].count;
+       count++;
+-      fprintf(file_, "%"PRIdPTR" ", traces[i].count);
++      fprintf(file_, "%" PRIdPTR" ", traces[i].count);
+       PrintStackTrace(&traces[i]);
+       fprintf(file_, "\n");
+     }
diff --git a/java/lightweight-java-profiler/files/patch-src_entry.cc b/java/lightweight-java-profiler/files/patch-src_entry.cc
new file mode 100644
index 000000000000..f70fbbc63406
--- /dev/null
+++ b/java/lightweight-java-profiler/files/patch-src_entry.cc
@@ -0,0 +1,20 @@
+--- src/entry.cc.orig	2015-04-15 08:00:23 UTC
++++ src/entry.cc
+@@ -182,7 +182,7 @@ static void SetFileFromOption(char *equa
+     if (Globals::OutFile == NULL) {
+       fprintf(stderr, "Could not open file %s: ", file_name);
+       perror(NULL);
+-      exit(1);
++      _exit(1);
+     }
+   }
+ 
+@@ -207,7 +207,7 @@ static void ParseArguments(char *options
+     char path[PATH_MAX];
+     if (getcwd(path, PATH_MAX) == NULL) {
+       fprintf(stderr, "cwd too long?\n");
+-      exit(0);
++      _exit(0);
+     }
+     size_t pathlen = strlen(path);
+     strncat(path, "/", PATH_MAX - (pathlen++));
diff --git a/java/lightweight-java-profiler/files/patch-src_globals.h b/java/lightweight-java-profiler/files/patch-src_globals.h
new file mode 100644
index 000000000000..fd9eb3a9e977
--- /dev/null
+++ b/java/lightweight-java-profiler/files/patch-src_globals.h
@@ -0,0 +1,23 @@
+--- src/globals.h.orig	2015-04-15 08:00:23 UTC
++++ src/globals.h
+@@ -179,18 +179,13 @@ class Accessors {
+ #endif
+ };
+ 
+-#if defined(__GNUC__) && (defined(i386) || defined(__x86_64))
+ #if defined(__x86_64__)
+ #define __CAS_INSTR "lock; cmpxchgq %1,%2"
+ #define __ADD_INSTR "lock; xaddq %0,%1"
+-#else  // defined(__x86_64__)
++#else
+ #define __CAS_INSTR "lock; cmpxchgl %1,%2"
+ #define __ADD_INSTR "lock; xaddl %0,%1"
+-#endif  // defined(__x86_64__)
+-#else  // defined(__GNUC__) && (defined(i386) || defined(__x86_64))
+-#error \
+-    "Cannot compile with non-x86.  Add support for atomic ops, if you want it"
+-#endif  // defined(__GNUC__) && (defined(i386) || defined(__x86_64))
++#endif
+ 
+ inline intptr_t NoBarrier_CompareAndSwap(volatile intptr_t *ptr,
+                                          intptr_t old_value,