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bdec3dd668
The trace_fs server provides access to a Trace_session by using a
File_system_session as frontend.
Each trace subject is represented by a directory ('thread_name.subject')
that contains specific files ('active', 'cleanup', 'enable', 'events',
'buffer_size' and 'policy'), which are used to control the tracing
process of the thread as well as storing the content of its trace
buffer.
The tracing of a thread is only activated if there is a valid policy
installed and the intend to trace the subject was made clear by writing
'1' to the 'enable' file.
The tracing of a thread may be deactived by writing a '0' to the
'enable' file.
A policy may be changed by overwriting the currently used one. In this
case the old policy is replaced by the new policy and is automatically
utilize.
Writing a value to the 'buffer_size' file changes the appointed size of
the trace buffer. This value is only evaluted by reactivating the
tracing process.
The content of the trace buffer may be accessed by reading from the
'events' file. Throughout all tracing session new trace events are
appended to this file.
Nodes of UNTRACED subjects are kept as long as they do not change their
tracing state to DEAD. In this case all nodes are removed from the
file system. Subjects that were traced before and are now UNTRACED will
only be removed by writing '1' to the 'cleanup' file - even if they
are DEAD by now.
To use the trace_fs a config similar to the following may be used:
! <start name="trace_fs">
! <resource name="RAM" quantum="128M"/>
! <provides><service name="File_system"/></provides>
! <config>
! <policy label="noux -> trace" interval="1000" subject_limit="512" trace_quota="64M" />
! </config>
! </start>
'interval' sets the periode in which the Trace_session is polled. The
time is given in milliseconds.
'subject_limit' speficies how many trace subject should by acquired at
most when the Trace_session is polled.
'trace_quota' is the amount of quota the trace_fs should use for the
Trace_session connection. The remaing amount of RAM quota will be used
for the actual nodes of the file system and the 'policy' as well as the
'events' files.
In addiition there are 'buffer_size' and 'buffer_size_limit' that define
the initial and the upper limit of the size of a trace buffer.
Tracing of parent processes or rather threads may be enabled by setting
'parent_levels' to a value greater than '0' (though this attribute is
available, the trace session component within core still lacks support
for it).
A ready-to-use runscript can by found in 'ports/run/noux_trace_fs.run'.
Fixes #1049.
254 lines
6.5 KiB
Tcl
254 lines
6.5 KiB
Tcl
#
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# The Linux version of Noux lacks the support for the fork system call. Hence,
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# the run script is expected to fail.
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#
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if {[have_spec linux]} {
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puts "Linux is unsupported."
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exit 0
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}
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#
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# On OMAP4 where no PS/2 is available, we rely on USB HID
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#
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proc use_usb_input { } { return [expr ![have_spec ps2] && [have_spec usb]] }
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#
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# Uncomment the following line when working on the VIM source code. Otherwise,
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# the package may get recompiled, yet it does not get reinstalled into 'bin/'.
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#
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#exec rm -rf noux-pkg/bash bin/bash
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set build_components {
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core init drivers/timer noux/minimal lib/libc_noux
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drivers/framebuffer drivers/pci drivers/input
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server/terminal server/ram_fs server/trace_fs
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test/libports/ncurses
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lib/trace/policy/rpc_name
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}
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lappend_if [use_usb_input] build_components drivers/usb
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lappend_if [have_spec gpio] build_components drivers/gpio
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lappend_if [have_spec acpi] build_components drivers/acpi
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lappend_if [have_spec pci] build_components drivers/pci
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set noux_pkgs "bash coreutils grep vim"
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#
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# Build Noux packages only once
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#
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foreach pkg $noux_pkgs {
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lappend_if [expr ![file exists bin/$pkg]] build_components noux-pkg/$pkg }
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build $build_components
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# write default vimrc file
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set vimrc_fd [open "bin/vim/share/vim/vimrc" w]
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puts $vimrc_fd {
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set noloadplugins
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set hls
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set nocompatible
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set laststatus=2
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set noswapfile
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set viminfo=}
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close $vimrc_fd
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# strip all binaries prior archiving
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foreach pkg $noux_pkgs {
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exec sh -c "find bin/$pkg -type f | (xargs [cross_dev_prefix]strip || true) 2>/dev/null"
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exec tar cfv bin/$pkg.tar -h -C bin/$pkg . }
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create_boot_directory
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append config {
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<config verbose="yes">
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<parent-provides>
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<service name="ROM"/>
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<service name="LOG"/>
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<service name="CAP"/>
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<service name="RAM"/>
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<service name="RM"/>
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<service name="CPU"/>
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<service name="PD"/>
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<service name="IRQ"/>
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<service name="IO_PORT"/>
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<service name="IO_MEM"/>
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<service name="SIGNAL"/>
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<service name="TRACE"/>
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</parent-provides>
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<default-route>
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<any-service> <any-child/> <parent/> </any-service>
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</default-route>
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<start name="timer">
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<resource name="RAM" quantum="1M"/>
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<provides><service name="Timer"/></provides>
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</start> }
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append_if [have_spec sdl] config {
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<start name="fb_sdl">
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<resource name="RAM" quantum="4M"/>
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<provides>
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<service name="Input"/>
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<service name="Framebuffer"/>
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</provides>
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</start>}
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append_if [have_spec acpi] config {
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<start name="acpi">
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<resource name="RAM" quantum="8M"/>
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<binary name="acpi_drv"/>
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<provides>
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<service name="PCI"/>
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<service name="IRQ" />
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</provides>
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<route>
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<service name="PCI"> <any-child /> </service>
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<any-service> <parent/> <any-child /> </any-service>
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</route>
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</start>}
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append_if [expr ![have_spec acpi] && [have_spec pci]] config {
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<start name="pci_drv">
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<resource name="RAM" quantum="5M"/>
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<provides><service name="PCI"/></provides>
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</start>}
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append_if [have_spec framebuffer] config {
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<start name="fb_drv">
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<resource name="RAM" quantum="4M"/>
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<provides><service name="Framebuffer"/></provides>
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<config width="640" height="480" />
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</start>}
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append_if [have_spec ps2] config {
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<start name="ps2_drv">
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<resource name="RAM" quantum="1M"/>
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<provides><service name="Input"/></provides>
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</start> }
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append_if [have_spec gpio] config {
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<start name="gpio_drv">
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<resource name="RAM" quantum="4M"/>
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<provides><service name="Gpio"/></provides>
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<config/>
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</start>}
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append_if [use_usb_input] config {
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<start name="usb_drv">
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<resource name="RAM" quantum="12M"/>
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<provides><service name="Input"/></provides>
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<config uhci="yes" ehci="yes" xhci="yes"> <hid/> </config>
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</start> }
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append config {
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<start name="terminal">
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<resource name="RAM" quantum="2M"/>
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<provides><service name="Terminal"/></provides>
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<config>
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<keyboard layout="us"/>
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<font size="12" />
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</config>
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</start>
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<start name="trace_fs">
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<resource name="RAM" quantum="128M"/>
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<provides><service name="File_system"/></provides>
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<config>
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<policy label="noux -> trace" root="/" interval="1000" subject_limit="512" trace_quota="64M" parent_levels="0" />
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</config>
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</start>
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<start name="ram_fs">
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<resource name="RAM" quantum="32M"/>
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<provides><service name="File_system"/></provides>
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<config>
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<content>
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<dir name="home">
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<inline name=".bash_profile">
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</inline>
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</dir>
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<dir name="tmp">
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<dir name="policies">
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<rom name="rpc_name" />
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</dir>
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</dir>
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</content>
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<!-- constrain sessions according to their labels -->
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<policy label="noux -> root" root="/" />
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<policy label="noux -> home" root="/home" writeable="yes" />
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<policy label="noux -> tmp" root="/tmp" writeable="yes" />
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</config>
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</start>
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<start name="noux">
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<resource name="RAM" quantum="256M" />
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<config>
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<fstab> }
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foreach pkg $noux_pkgs {
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append config " <tar name=\"$pkg.tar\" />" }
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append config {
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<dir name="home"> <fs label="home" /> </dir>
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<dir name="ram"> <fs label="root" /> </dir>
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<dir name="tmp"> <fs label="tmp" /> </dir>
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<dir name="trace"> <fs label="trace" /> </dir>
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<dir name="dev">
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<null /> <zero />
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</dir>
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</fstab>
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<start name="/bin/bash">
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<env name="TERM" value="linux" />
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<env name="HOME" value="/home" />
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<arg value="--login" />
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</start>
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</config>
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<route>
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<service name="File_system">
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<if-arg key="label" value="home"/> <child name="ram_fs" /> </service>
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<service name="File_system">
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<if-arg key="label" value="root"/> <child name="ram_fs" />
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</service>
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<service name="File_system">
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<if-arg key="label" value="tmp"/> <child name="ram_fs" />
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</service>
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<service name="File_system">
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<if-arg key="label" value="trace"/> <child name="trace_fs"/>
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</service>
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<any-service> <parent /> <any-child /> </any-service>
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</route>
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</start>
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</config>}
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install_config $config
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#
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# Boot modules
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#
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# generic modules
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set boot_modules {
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core init timer ld.lib.so noux terminal ram_fs
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libc.lib.so libm.lib.so libc_noux.lib.so
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ncurses.lib.so pcre.lib.so zlib.lib.so readline.lib.so
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trace_fs
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rpc_name
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}
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foreach pkg $noux_pkgs {
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append boot_modules " $pkg.tar " }
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# platform-specific modules
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lappend_if [have_spec linux] boot_modules fb_sdl
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lappend_if [have_spec pci] boot_modules pci_drv
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lappend_if [have_spec ps2] boot_modules ps2_drv
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lappend_if [have_spec framebuffer] boot_modules fb_drv
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lappend_if [use_usb_input ] boot_modules usb_drv
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lappend_if [have_spec gpio] boot_modules gpio_drv
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lappend_if [have_spec acpi] boot_modules acpi_drv
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build_boot_image $boot_modules
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append qemu_args " -m 512 "
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run_genode_until forever
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# vi: set ft=tcl :
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