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‎.ignore‎

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./.git
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./build/config.sh
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./build/dtrace
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./build/simple-c
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./build/simple-cpp
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./checksum.lst
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./drivers/dtrace/checksum.lst
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./build*
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checksum.lst
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*.so
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*.o
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./drivers/dtrace/syscalls-x86-64.tbl
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./drivers/dtrace/syscalls-x86.tbl
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./drivers/dtrace/Module.symvers
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./drivers/dtrace/Module.markers
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./libdtrace/dt_grammar.h
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./libdtrace/dt_lex.c
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./usdt/c/shlib.so
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./usdt/c/simple.o
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./usdt/cpp/shlib.so
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./usdt/cpp/simple.o
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./utils/access
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./utils/mknod
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./utils/pread

‎Changes‎

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Fri Feb 6 11:09:54 2009 fox
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136* Archive: 1.0057
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135* drivers/include -> ./include due to new build structure.
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build/ is a symlink to build-`uname -r`.
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drivers/dtrace/* -> driver
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134* makefiles: Allow us to label the build dir with the appropriate
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kernel version, so we can do multiple kernel builds.
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Thu Feb 5 10:35:22 2009 fox
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133* Archive: 1.055

‎Differences‎

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‎README‎

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Linux port of DTrace
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3-
April 2008
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Feb 2009
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Paul D. Fox
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fox@crisp.demon.co.uk
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The linux kernel was referred to in order to engineer the glue
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for dtrace behavior, and there is no intention of making this
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code fall under anything other than CDDL.
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code fall under anything other than CDDL. (If Sun migrate
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to a GPL friendly license, then this port of dtrace can follow).
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I do not own the license or assert any rights on the licensing
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other than that expected of me as a consumer/supplier.
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I have no political affiliation or preference for a licensing scheme,
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simply that Sun has gracefully donated to the community a large body
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people to use, debug and enhance it.
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Installation
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============
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Very simple:
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$ make all
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$ make install
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$ make load (need to be root or have sudo access)
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More details
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============
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Building is done in a build/ directory. The makefiles allow
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you to compile for alternate kernel releases in the same tree,
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which is useful for cross-version checking.
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The result is:
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build/dtrace User land executable
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build/drti.o Object file for USDT apps
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build/driver/dtracedrv.ko Kernel loadable module
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Installing will copy them to Solaris compliant locations:
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/usr/sbin/dtrace
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/usr/lib/dtrace/64/drti.o
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You dont need to 'install' to run dtrace, but you will need
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to load the driver.
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Kernel versioning
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=================
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dtrace relies on a kernel module and so a binary is needed
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per system you deploy to, or kernel version.
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dtrace is sensitive to the kernel - and attempts to cater for that,
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but very old, or very new kernels may not have been validated.
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Please feed back if that is the case.
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No Linux Kernel source modifications required
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=============================================
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This is important for a number of reasons -- unless dtrace
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is accepted into the kernel, it has to live with changes to header
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files and data structures. Also, from a licensing perspective it
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is not valid for dtrace to touch your sources. It is also much
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easier to not even require kernel sources - so long as
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a kernel build environment is available.
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Miscellaneous
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=============
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Packages, for hints on what you need (not much, but libelf, kernel
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source, flex/yacc -- bison will do).
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make install
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Copy dtrace binary and driver to correct install location.
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make load
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To load the drivers, and then you can play with cmd/dtrace/dtrace.
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make test
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To run the userland cmd/dtrace regression test
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DRIVERS
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=======
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You dont really need to worry about the drivers (its all encapsulated into
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a single driver file -- dtracedrv.ko, assuming all goes well). You
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may find these pop into /dev on 'make load'.
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/dev/dtrace
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The main component of the implementation.
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/dev/fbt
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A 'provider' which provides a mechanism for accessing a collection
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of features via dtrace. This is the function-boundary-tracing module,
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and it the bit of magic which can plant breakpoints on any
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kernel function.
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/dev/dtrace_profile
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Used by the profile-NNN and tick-NNN probe provider.
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/dev/sdt
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Static dtrace probe driver.
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/dev/systrace
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System call tracing driver.

‎archive.sh‎

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NAME=dtrace
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MAJ_VERSION=1
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MIN_VERSION=0055
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MIN_VERSION=0057
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EXCLUDE="*.ko *.o"
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EXCLUDE_DIRS="build"
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#date Thu Feb 5 11:08:08 GMT 2009
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#date Fri Feb 6 16:27:38 GMT 2009

‎cmd/dtrace/makefile‎

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CFLAGS=-g -W $(PTR32)
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LIBELF=/usr/lib/libelf.so.1
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BINDIR=../../build
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BINDIR=../../$(BUILD_DIR)
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LIBS = \
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$(BINDIR)/libctf.a \
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$(BINDIR)/libdtrace.a \
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$(BINDIR)/libproc.a \
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$(BINDIR)/liblinux.a
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COMPILE = $(CC) $(CFLAGS) -o $(BINDIR)/dtrace \
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-L../../build \
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-L$(BINDIR) \
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$(BINDIR)/dtrace.o -ldtrace -lctf -lproc -llinux -lz -lrt -lpthread $$libelf -ldl
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all: $(BINDIR)/dtrace
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@/bin/true
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$(BINDIR)/dtrace: $(BINDIR)/dtrace.o $(LIBS)
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@libelf=$(LIBELF) ; \

drivers/dtrace/.gdbinit renamed to driver/.gdbinit

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drivers/dtrace/Makefile renamed to driver/Makefile

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LDFLAGS += --wrap __udivdi3
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LDFLAGS += --wrap __umoddi3
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LDFLAGS += --wrap __divdi3
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dtracedrv-objs += ../../build/x86-32/libgcc.a
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dtracedrv-objs += ../libgcc.a
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endif
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obj-m := dtracedrv.o
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EXTRA_CFLAGS += \
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-I$(M) \
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-I$(M)/../.. \
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-I$(M)/../include \
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-I$(M)/../../include \
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-I$(M)/../../linux \
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-I$(M)/../../common/ctf \
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-I$(M)/../../uts/common \
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-D_KERNEL -DCTF_OLD_VERSIONS $(PTR32)
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clean:
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rm -rf .tmp_versions *.a *.o *.ko *.bak .*.d .*.cmd *.mod.c Module.symvers
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rm -rf .tmp_versions *.a *.o *.ko *.bak .*.d .*.cmd *.mod.c Module.* modules.order
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unl:
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setuid root rmmod dtracedrv

‎driver/README‎

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This directory contains the kernel code. We have a number
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of drivers here, corresponding to the Solaris dtrace /dev
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area. Major files are Solaris source code, with appropriate (small)
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changes for working under Linux.
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Other files, are linux drop-ins to complete the circle of
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bits needed to create a solaris driver.
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We no longer build in the source tree, since Linux kernel builder
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deposits lots of build output files here, but we build in the
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build-`uname -r`/ tree instead, so that output files are
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segregated from the input sources.
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P Fox Feb 2009

drivers/dtrace/ctf_mod.c renamed to driver/ctf_mod.c

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