=head1 SYNOPSIS
- # dtrace -Zn 'perl::sub-entry, perl::sub-return { trace(copyinstr(arg0)) }'
- dtrace: description 'perl::sub-entry, perl::sub-return ' matched 10 probes
-
- # perl -E 'sub outer { inner(@_) } sub inner { say shift } outer("hello")'
- hello
-
- (dtrace output)
- CPU ID FUNCTION:NAME
- 0 75915 Perl_pp_entersub:sub-entry BEGIN
- 0 75915 Perl_pp_entersub:sub-entry import
- 0 75922 Perl_pp_leavesub:sub-return import
- 0 75922 Perl_pp_leavesub:sub-return BEGIN
- 0 75915 Perl_pp_entersub:sub-entry outer
- 0 75915 Perl_pp_entersub:sub-entry inner
- 0 75922 Perl_pp_leavesub:sub-return inner
- 0 75922 Perl_pp_leavesub:sub-return outer
+ # dtrace -Zn 'perl::sub-entry, perl::sub-return { trace(copyinstr(arg0)) }'
+ dtrace: description 'perl::sub-entry, perl::sub-return ' matched 10 probes
+
+ # perl -E 'sub outer { inner(@_) } sub inner { say shift } outer("hello")'
+ hello
+
+ (dtrace output)
+ CPU ID FUNCTION:NAME
+ 0 75915 Perl_pp_entersub:sub-entry BEGIN
+ 0 75915 Perl_pp_entersub:sub-entry import
+ 0 75922 Perl_pp_leavesub:sub-return import
+ 0 75922 Perl_pp_leavesub:sub-return BEGIN
+ 0 75915 Perl_pp_entersub:sub-entry outer
+ 0 75915 Perl_pp_entersub:sub-entry inner
+ 0 75922 Perl_pp_leavesub:sub-return inner
+ 0 75922 Perl_pp_leavesub:sub-return outer
=head1 DESCRIPTION
no way to get ahold of any information about the subroutine's
I<caller> from a DTrace action.
- :*perl*::sub-entry {
- printf("%s::%s entered at %s line %d\n",
- copyinstr(arg3), copyinstr(arg0), copyinstr(arg1), arg0);
- }
+ :*perl*::sub-entry {
+ printf("%s::%s entered at %s line %d\n",
+ copyinstr(arg3), copyinstr(arg0), copyinstr(arg1), arg2);
+ }
=item sub-return(SUBNAME, FILE, LINE, PACKAGE)
way to get ahold of any information about the subroutine's I<caller>
from a DTrace action.
- :*perl*::sub-return {
- printf("%s::%s returned at %s line %d\n",
- copyinstr(arg3), copyinstr(arg0), copyinstr(arg1), arg0);
- }
+ :*perl*::sub-return {
+ printf("%s::%s returned at %s line %d\n",
+ copyinstr(arg3), copyinstr(arg0), copyinstr(arg1), arg2);
+ }
=item phase-change(NEWPHASE, OLDPHASE)
since the values for C<NEWPHASE> and C<OLDPHASE> are the strings that
C<${^GLOBAL_PHASE}> reports.
- :*perl*::phase-change {
- printf("Phase changed from %s to %s\n",
- copyinstr(arg1), copyinstr(arg0));
- }
+ :*perl*::phase-change {
+ printf("Phase changed from %s to %s\n",
+ copyinstr(arg1), copyinstr(arg0));
+ }
=item op-entry(OPNAME)
enabled, the DTrace probe is fired I<after> the debugger hooks (but
still before the opcode itself is executed).
- :*perl*::op-entry {
- printf("About to execute opcode %s\n", copyinstr(arg0));
- }
+ :*perl*::op-entry {
+ printf("About to execute opcode %s\n", copyinstr(arg0));
+ }
=item loading-file(FILENAME)
read from disk. The filename argument is converted to local filesystem
paths instead of providing C<Module::Name>-style names.
- :*perl*:loading-file {
- printf("About to load %s\n", copyinstr(arg0));
- }
+ :*perl*:loading-file {
+ printf("About to load %s\n", copyinstr(arg0));
+ }
=item loaded-file(FILENAME)
Fires when Perl has successfully loaded an individual file, whether
from C<use>, C<require>, or C<do>. This probe fires after the file
-is read from disk and its contentss evaluated. The filename argument
+is read from disk and its contents evaluated. The filename argument
is converted to local filesystem paths instead of providing
C<Module::Name>-style names.
- :*perl*:loaded-file {
- printf("Successfully loaded %s\n", copyinstr(arg0));
- }
+ :*perl*:loaded-file {
+ printf("Successfully loaded %s\n", copyinstr(arg0));
+ }
=back
=item Most frequently called functions
- # dtrace -qZn 'sub-entry { @[strjoin(strjoin(copyinstr(arg3),"::"),copyinstr(arg0))] = count() } END {trunc(@, 10)}'
+ # dtrace -qZn 'sub-entry { @[strjoin(strjoin(copyinstr(arg3),"::"),copyinstr(arg0))] = count() } END {trunc(@, 10)}'
- Class::MOP::Attribute::slots 400
- Try::Tiny::catch 411
- Try::Tiny::try 411
- Class::MOP::Instance::inline_slot_access 451
- Class::MOP::Class::Immutable::Trait:::around 472
- Class::MOP::Mixin::AttributeCore::has_initializer 496
- Class::MOP::Method::Wrapped::__ANON__ 544
- Class::MOP::Package::_package_stash 737
- Class::MOP::Class::initialize 1128
- Class::MOP::get_metaclass_by_name 1204
+ Class::MOP::Attribute::slots 400
+ Try::Tiny::catch 411
+ Try::Tiny::try 411
+ Class::MOP::Instance::inline_slot_access 451
+ Class::MOP::Class::Immutable::Trait:::around 472
+ Class::MOP::Mixin::AttributeCore::has_initializer 496
+ Class::MOP::Method::Wrapped::__ANON__ 544
+ Class::MOP::Package::_package_stash 737
+ Class::MOP::Class::initialize 1128
+ Class::MOP::get_metaclass_by_name 1204
=item Trace function calls
- # dtrace -qFZn 'sub-entry, sub-return { trace(copyinstr(arg0)) }'
-
- 0 -> Perl_pp_entersub BEGIN
- 0 <- Perl_pp_leavesub BEGIN
- 0 -> Perl_pp_entersub BEGIN
- 0 -> Perl_pp_entersub import
- 0 <- Perl_pp_leavesub import
- 0 <- Perl_pp_leavesub BEGIN
- 0 -> Perl_pp_entersub BEGIN
- 0 -> Perl_pp_entersub dress
- 0 <- Perl_pp_leavesub dress
- 0 -> Perl_pp_entersub dirty
- 0 <- Perl_pp_leavesub dirty
- 0 -> Perl_pp_entersub whiten
- 0 <- Perl_pp_leavesub whiten
- 0 <- Perl_dounwind BEGIN
+ # dtrace -qFZn 'sub-entry, sub-return { trace(copyinstr(arg0)) }'
+
+ 0 -> Perl_pp_entersub BEGIN
+ 0 <- Perl_pp_leavesub BEGIN
+ 0 -> Perl_pp_entersub BEGIN
+ 0 -> Perl_pp_entersub import
+ 0 <- Perl_pp_leavesub import
+ 0 <- Perl_pp_leavesub BEGIN
+ 0 -> Perl_pp_entersub BEGIN
+ 0 -> Perl_pp_entersub dress
+ 0 <- Perl_pp_leavesub dress
+ 0 -> Perl_pp_entersub dirty
+ 0 <- Perl_pp_leavesub dirty
+ 0 -> Perl_pp_entersub whiten
+ 0 <- Perl_pp_leavesub whiten
+ 0 <- Perl_dounwind BEGIN
=item Function calls during interpreter cleanup
- # dtrace -Zn 'phase-change /copyinstr(arg0) == "END"/ { self->ending = 1 } sub-entry /self->ending/ { trace(copyinstr(arg0)) }'
+ # dtrace -Zn 'phase-change /copyinstr(arg0) == "END"/ { self->ending = 1 } sub-entry /self->ending/ { trace(copyinstr(arg0)) }'
- CPU ID FUNCTION:NAME
- 1 77214 Perl_pp_entersub:sub-entry END
- 1 77214 Perl_pp_entersub:sub-entry END
- 1 77214 Perl_pp_entersub:sub-entry cleanup
- 1 77214 Perl_pp_entersub:sub-entry _force_writable
- 1 77214 Perl_pp_entersub:sub-entry _force_writable
+ CPU ID FUNCTION:NAME
+ 1 77214 Perl_pp_entersub:sub-entry END
+ 1 77214 Perl_pp_entersub:sub-entry END
+ 1 77214 Perl_pp_entersub:sub-entry cleanup
+ 1 77214 Perl_pp_entersub:sub-entry _force_writable
+ 1 77214 Perl_pp_entersub:sub-entry _force_writable
=item System calls at compile time
- # dtrace -qZn 'phase-change /copyinstr(arg0) == "START"/ { self->interesting = 1 } phase-change /copyinstr(arg0) == "RUN"/ { self->interesting = 0 } syscall::: /self->interesting/ { @[probefunc] = count() } END { trunc(@, 3) }'
+ # dtrace -qZn 'phase-change /copyinstr(arg0) == "START"/ { self->interesting = 1 } phase-change /copyinstr(arg0) == "RUN"/ { self->interesting = 0 } syscall::: /self->interesting/ { @[probefunc] = count() } END { trunc(@, 3) }'
- lseek 310
- read 374
- stat64 1056
+ lseek 310
+ read 374
+ stat64 1056
=item Perl functions that execute the most opcodes
- # dtrace -qZn 'sub-entry { self->fqn = strjoin(copyinstr(arg3), strjoin("::", copyinstr(arg0))) } op-entry /self->fqn != ""/ { @[self->fqn] = count() } END { trunc(@, 3) }'
+ # dtrace -qZn 'sub-entry { self->fqn = strjoin(copyinstr(arg3), strjoin("::", copyinstr(arg0))) } op-entry /self->fqn != ""/ { @[self->fqn] = count() } END { trunc(@, 3) }'
- warnings::unimport 4589
- Exporter::Heavy::_rebuild_cache 5039
- Exporter::import 14578
+ warnings::unimport 4589
+ Exporter::Heavy::_rebuild_cache 5039
+ Exporter::import 14578
=back
=over 4
-=item DTrace User Guide
+=item DTrace Dynamic Tracing Guide
-L<http://download.oracle.com/docs/cd/E19082-01/819-3620/index.html>
+L<http://dtrace.org/guide/preface.html>
=item DTrace: Dynamic Tracing in Oracle Solaris, Mac OS X and FreeBSD
-L<http://www.amazon.com/DTrace-Dynamic-Tracing-Solaris-FreeBSD/dp/0132091518/>
+L<https://www.amazon.com/DTrace-Dynamic-Tracing-Solaris-FreeBSD/dp/0132091518/>
=back
=item L<Devel::DTrace::Provider>
-This CPAN module lets you create application-level DTrace probes written in Perl.
+This CPAN module lets you create application-level DTrace probes written in
+Perl.
=back
https://perl5.git.perl.org / perl5.git / blobdiff