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* make skip-badvars warning message sensitive to -w suppressionFrank Ch. Eigler2009-04-031-2/+3
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* Fix for insn probe: Call arch_has_*_step() prior to calling utrace_controlMaynard Johnson2009-04-011-0/+16
| | | | | | | | | | | | | | The attached patch is version 2 for the problem I reported earlier today. Frank, is this more what you had in mind? With this patch, there's no need for the user to look at the system log. Error messages are sent to stderr: ERROR: insn probe init: arch does not support block step mode ERROR: probe process("/test").function("doit1@/test.c:22").return registration error (rc -1) -Maynard
* Move #endif for STP_NEED_VMA_TRACKER up to not cover other utrace callbacks.Mark Wielaard2009-04-011-1/+1
| | | | * tapsets.cxx (utrace_derived_probe_group::emit_module_init): Correct #endif.
* Merge branch 'master' into pr6866Mark Wielaard2009-04-011-31/+88
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| * Use alloca trick to keep argN active on GCC 4.1.Stan Cox2009-04-011-2/+3
| | | | | | | | | | | | * includes/sys/sdt.h (STAP_UNINLINE): New. (STAP_UNINLINE_LABEL): New. static_uprobes.exp: Match using charset instead of .*
| * Customize .mark -l output.Stan Cox2009-03-311-1/+14
| | | | | | | | | | | | * tapsets.cxx (dwarf_builder::build): Add .mark name wildcard check. Customize -l handling. * testsuite/systemtap.base/static_uprobes.exp: Test .mark name wildcard.
| * PR7045: on 64-bit kernels, allow 32-bit userspace to be pass elf validationFrank Ch. Eigler2009-03-271-10/+24
| | | | | | | | * tapsets.cxx (validate_elf): Reorganize glob matching for x86 and ppc.
| * Don't do beginning of statement check for .mark probesStan Cox2009-03-271-3/+7
| | | | | | | | | | | | * tapsets.cxx (dwarf_query): Add has_mark. (query_cu): Use for beginning of statement check. (dwarf_builder::build): Set has_mark.
| * PR10000: emit _stp_relocate* calculations correctly for kernel/module global ↵Frank Ch. Eigler2009-03-271-6/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | $data * translate.cxx (dump_unwindsyms): Also emit STT_OBJECT symbols, therefore .data etc. sections into stap-symbols.h. * tapsets.cxx (iterate_over_modules): Omit a dwfl_getmodules() RC-checking assertion that blocked meaningful $context var error messages. (dwflpp::emit_address): Bypass dwfl_module_relocate_address() for kernel symbols as it has been unreliable; subtract sess.sym_stext manually. * testsuite/buildok/seventeen.stp: Extend test with module $global.
| * build fix for RHEL4-era gcc 3.4.6Frank Ch. Eigler2009-03-241-2/+3
| | | | | | | | | | * tapsets.cxx (stringhash): Go to __gnu_cxx. (dwarf_cast_expanding_visitor::visit_cast_op): Use ~0 for all-ones.
| * PR9993: tracepoint toleration for undeclared types in trace/*.h headersFrank Ch. Eigler2009-03-241-1/+19
| | | | | | | | | | | | | | | | | | * tapsets.cxx (tracepoint_extra_headers): New function to return needed header file names. (emit_module_decls): Emit them. * buildrun.cxx (make_tracequery): Emit them. * testsuite/systemtap.base/tracepoints.exp: Rewrite to exercise building each tracepoint.
| * Keep static probe parameters visible while inlining.Stan Cox2009-03-241-10/+3
| | | | | | | | | | | | | | | | * includes/sys/sdt.h (STAP_PROBEN): Revive the STAP_LABEL macro to prevent inlining to keep probe parameters visible. Use +rm constraints. * tapsets.cxx (build): Use .probes section for all uses of static probes.
* | Wrap vma callbacks in STP_NEED_VMA_TRACKER.Mark Wielaard2009-04-011-0/+12
| | | | | | | | | | | | | | | | Will be defined by new ucontext symbol stapset. * tapset.cxx: Wrap all vma callbacks in STP_NEED_VMA_TRACKER. * testsuite/systemtap.context/usymbols.exp: Define STP_NEED_VMA_TRACKER explicitly for now.
* | Merge branch 'master' into pr6866Mark Wielaard2009-03-221-2/+36
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| * Cache the tracepoint query resultsJosh Stone2009-03-201-1/+33
| | | | | | | | | | | | | | To use tracepoints, we build a "tracequery" module that compiles debuginfo for all available tracepoints in the user's kernel. That's a bit of a cumbersome step to do during pass-2 though. This change adds tracequery caching so we only need to compile it once.
| * PR9967: don't count -DINTERRUPTIBLE=1 reentrancy against MAXSKIPPEDFrank Ch. Eigler2009-03-201-1/+3
| | | | | | | | | | | | | | * tapsets.cxx (common_probe_entryfn_prologue): Become conditional on !INTERRUPTIBLE. * translate.cxx (emit_module_exit): Still print skipped_count_reentrant with -t, even if skipped_count was zero.
* | Emit vma callbacks for uprobes.Mark Wielaard2009-03-201-0/+20
| | | | | | | | | | | | | | | | * tapsets.cxx (uprobe_derived_probe_group::emit_module_decls): Emit vma callbacks. (uprobe_derived_probe_group::emit_module_init): Activate vma callbacks. * testsuite/systemtap.context/usymbols.exp: Track through uprobes, so as to make sure we have the symbols.
* | Emit vma callbacks for itrace.Mark Wielaard2009-03-201-0/+25
| | | | | | | | | | | | * tapsets.cxx (itrace_derived_probe_group::emit_module_decls): Emit vma callbacks. (itrace_derived_probe_group::emit_module_init): Activate vma callbacks.
* | Explicitly emit utrace vma callbacks.Mark Wielaard2009-03-201-48/+45
| | | | | | | | | | | | | | | | * tapsets.cxx (utrace_derived_probe_group::emit_vm_callback_probe_decl): Removed. (emit_vma_callback_probe_decl): New static helper function. (utrace_derived_probe_group::emit_module_decls): Emit vma callbacks. (utrace_derived_probe_group::emit_module_init): Activate vma callbacks.
* | Move _stp_tf_vm_cb to sym.c.Mark Wielaard2009-03-201-41/+0
| | | | | | | | | | | | * tapsets.cxx (utrace_derived_probe_group::emit_module_decls): Remove output task finder vma callback _stp_tf_vm_cb. * runtime/sym.c (_stp_tf_vm_cb): And add it here.
* | Don't double include task_finder.c.Mark Wielaard2009-03-201-1/+0
| | | | | | | | | | * tapsets.cxx (itrace_derived_probe_group::emit_module_decls): Don't emit another include task_finder.c. Already done through runtime.h.
* | Merge branch 'master' into pr6866Mark Wielaard2009-03-201-42/+86
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| * PR9960: support tracepoint struct/union value argJosh Stone2009-03-191-3/+13
| | | | | | | | | | | | If a tracepoint arg is a structure or union that is passed by value, then this takes the address of the parameter so it can be used like a pointer in the rest of our code.
| * Throw type into semantic_error message of @cast when not found.Mark Wielaard2009-03-191-1/+2
| | | | | | | | | | * tapsets.cxx (dwarf_cast_expanding_visitor::visit_cast_op): Add type to msg added to semantic_error when thrown.
| * Disable kprobe blacklist in guru mode.Lubomir Rintel2009-03-191-3/+11
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| * rename process().itrace -> process().insn introduce process().insn.blockFrank Ch. Eigler2009-03-191-3/+10
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| * PR9959: hide tracepoint arguments of unknown typeJosh Stone2009-03-181-18/+22
| | | | | | | | | | | | We always have to know the type name of tracepoint arguments, so we can declare the right function callback, but we can suppress access to those types which we don't (yet) know how to read.
| * PR9959: improve tracepoint arg type-namingJosh Stone2009-03-181-14/+26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | dwarf_type_name now works with more argument types. There were three cases that I needed to improve: - For "const struct foo*", the debuginfo has a const-DIE named "foo" chained to a struct-DIE named "foo", so we can't assume that seeing a name means we're down to the base type. The recursion now decends until it explicitly sees a base_type, typedef, struct, or union. - For "void*", the debuginfo has a pointer-DIE without any DW_AT_type after. Now I'm just catching that failed lookup and writing in "void". - For "va_list", the debuginfo actually resolves to an internal type "struct __va_list_tag*", but that struct has no declaration at the source level. I'm just hacking that exact case to say "va_list" instead, but it would be nice to find something cleaner... We'll probably still have problems if any tracepoint uses a function- pointer argument, but so far I've only seen that as a "void*", which we now handle ok.
| * Support tracepoints with no argumentsJosh Stone2009-03-181-0/+2
| | | | | | | | | | | | LTTng has a few tracepoints without any arguments, which caused our compile to fail, claiming that our entry function was not a declaration. This just adds an explicit (void) argument list for that case.
* | Remove __stp_tf_vm_cb from task_finder interface.Mark Wielaard2009-03-191-2/+43
| | | | | | | | | | | | * runtime/task_finder.c (__stp_tf_vm_cb): Removed. * tapsets.cxx (utrace_derived_probe_group::emit_module_decls): Output task finder vma callback and hook it.
* | Merge branch 'master' into pr6866Mark Wielaard2009-03-171-146/+945
|\| | | | | | | | | Resolved conflicts: runtime/task_finder.c: name vs path.
| * Fix regression in tracepoint unregistrationJosh Stone2009-03-161-3/+8
| | | | | | | | | | | | | | | | | | | | | | | | Commit 96b030fe reorganized the tracepoint registration calls by creating generic wrappers that return int. However, the older tracepoint implementation (as found in RHEL5.3) returned void for unreg, so this was failing pass-4. Since we can't handle unregistration failures anyway, this change just makes the generic unregister function return void instead. As noted in the newly-added comment, it should be safe for us to ignore unreg failures.
| * Move vma module tracking from pr6866 branch to master.Mark Wielaard2009-03-151-4/+0
| | | | | | | | | | | | | | | | | | | | | | | | * tapsets.cxx (utrace_derived_probe_group::emit_module_decls): Always emit vm callback probe for __stp_tf_vm_cb. * runtime/task_finder.c (__stp_tf_vm_cb): Always expose, move _stp_dbug statements under ifdef DEBUG_TASK_FINDER_VMA. Find and record corresponding module when vm_path not NULL. * runtime/task_finder_vma.c (struct __stp_tf_vma_entry): Add _stp_module. (stap_add_vma_map_info): Add _stp_module argument and assign. (__stp_tf_get_vma_entry_addr): New static function to get the __stp_tf_vma_entry given an address.
| * Simplify tracepoint registrationsJosh Stone2009-03-121-28/+43
| | | | | | | | | | | | | | Instead of registering tracepoints with the deeply-nested if-tree, which was cluttering the module_init/exit, this now emits normalized reg/unreg functions for each tracepoint probes. Now the module_init/exit can be a simple loop like all of the other probe types.
| * Fix @cast module splittingJosh Stone2009-03-111-1/+1
| | | | | | | | | | | | The new semok testcase exposed that the module splitting wasn't properly setting substr boundaries. Instead of passing the end position, it's supposed to pass the number of characters (end - begin). Oops.
| * PR 7071: Optional $context variables fixRajan Arora2009-03-111-12/+25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * tapsets.cxx (dwarf_var_expanding_visitor::visit_target_symbol): Substitute erroneous target symbol with literal 0 if session level flag, skip_badvars is set. * session.h (struct systemtap_session): New flag: skip_badvars. * main.cxx: Command line argument --skip-badvars added. * stap.1.in: Entry for new option --skip-badvars. * NEWS: Added blurb for new option now available. * testsuite/semok/badvar.stp: Test case to check added functionality.
| * Make marker probe support listing mode -LWenji Huang2009-03-101-0/+22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch is to enable displaying the arguments of marker probe for listing mode -L. The output is like, $stap -L 'kernel.mark("*")' kernel.mark("core_marker_format").format("name %s format %s") $arg1:string $arg2:string kernel.mark("jbd2_checkpoint").format("dev %s need_checkpoint %d") $arg1:string $arg2:long kernel.mark("jbd2_end_commit").format("dev %s transaction %d head %d") $arg1:string $arg2:long $arg3:long kernel.mark("jbd2_start_commit").format("dev %s transaction %d") $arg1:string $arg2:long Note: It's also possible to figure out the arguments according to the format. Signed-off-by: Wenji Huang <wenji.huang@oracle.com>
| * Make tracepoint probe support listing mode -LWenji Huang2009-03-101-0/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch is to enable displaying arguments of tracepoint probe in listing mode -L. The example output is like $stap -L 'kernel.trace("block_bio*")' kernel.trace("block_bio_bounce") $q:struct request_queue* $bio:struct bio* kernel.trace("block_bio_backmerge") $q:struct request_queue* $bio:struct bio* kernel.trace("block_bio_complete") $q:struct request_queue* $bio:struct bio* kernel.trace("block_bio_queue") $q:struct request_queue* $bio:struct bio* kernel.trace("block_bio_frontmerge") $q:struct request_queue* $bio:struct bio* Signed-off-by: Wenji Huang <wenji.huang@oracle.com>
| * PR9932: add @cast module search pathJosh Stone2009-03-101-39/+30
| | | | | | | | | | | | | | | | | | | | | | | | Sometimes @cast()ing can fail if the type needed may or may not be defined in a kernel module. This patch lets @cast take a colon- separated list of modules to search for the type definition. * tapsets.cxx (dwarf_cast_query): Simplify. Take the module and the code result as reference parameters, and use code.empty() as the sign that the type isn't resolved yet. (dwarf_cast_expanding_visitor::visit_cast_op): Split e->module by colon into substrings, and loop until the type is resolved.
| * Let -DINTERRUPTIBLE=0 mask interrupts in probesJosh Stone2009-03-091-24/+27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some time ago we loosened up the code for all probe types to allow interrupts during the handler. However, when probing something like kernel.trace("*"), you get a mix of probes in and out of the interrupt path, and it becomes much more common to have probes skipped due to interrupt reentrancy. The common_probe_entryfn_prologue and common_probe_entryfn_epilogue functions had an interruptible flag, but this was no longer used anywhere. I removed this flag, but then reused the logic to check an INTERRUPTIBLE macro instead. Now users can use -DINTERRUPTIBLE=0 to prevent interrupt reentrancy in their script, at the cost of a bit more overhead to toggle the interrupt mask.
| * Add tracepoint $$parms alias for $$varsJosh Stone2009-03-091-3/+5
| | | | | | | | | | | | For parity with the DWARF probes, this makes tracepoints also define $$parms, which has the same value as $$vars (since tracepoints are missing the concept of $$locals).
| * Update location of c->probe_point resetJosh Stone2009-03-091-1/+1
| | | | | | | | | | The probe_point clear was nested in the overload processing code, I believe accidentally. This just makes it always cleared on probe exit.
| * Fix and add tests for function(".so").statement(N)Stan Cox2009-03-081-3/+3
| | | | | | | | | | | | | | | | * tapsets.cxx (query_dwarf_func): die_has_pc (dwarf_haspc) does not expect a module_start for shared objects so don't call module_address_to_global for the statement address. * testsuite/systemtap.base/labels.exp: Add tests for executable .statement(N), shared object .label("L") and so .statement(N).
| * PR9930: reentrancy debuggingFrank Ch. Eigler2009-03-071-38/+35
| | | | | | | | | | | | | | | | | | If stap is run with "-t -DDEBUG_REENTRANCY", additional warnings will be printed for every reentrancy event, including the probe points of the resident and interloper probes. * tapsets.cxx (common_probe_entryfn_prologue): Add "new_pp" argument, update all callers. Print reentrancy details if needed.
| * Tweak tracepoint logic to run on tracepoint_synchronize_unregister()-less RHEL5Frank Ch. Eigler2009-03-071-4/+13
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| * Ensure tracepoints are synchronized after unregJosh Stone2009-03-061-0/+4
| | | | | | | | | | | | | | | | | | | | The tracepoint API provides tracepoint_synchronize_unregister() as a way to guarantee that all tracepoint handlers are inactive. This is necessary after unregistering to allow the module to safely unload. * tapsets.cxx (tracepoint_derived_probe_group::emit_module_init): Call synchronize after unregistering tracepoints. (tracepoint_derived_probe_group::emit_module_exit): Ditto.
| * Enable tracepoint target variablesJosh Stone2009-03-061-3/+338
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This uses a similar mechanism as marker probes for storing target variables in locals of the probe body. * tapsets.cxx (tracepoint_arg): Add fields to help $target access. (tracepoint_var_expanding_visitor): Expand code to access target variables - a $target for each tracepoint parameter, as well as the special $$name and $$vars. (tracepoint_derived_probe::tracepoint_derived_probe): Expand targets (resolve_tracepoint_arg_type): Determine if a parameter is a type that we can dereference, and store the underlying type. (tracepoint_derived_probe::build_args): Resolve the types. (tracepoint_derived_probe::emit_probe_context_vars): Emit $target placeholders into the locals of the probe body. (tracepoint_derived_probe_group::emit_module_decls): Initialize $targets from the entry point parameters.
| * Emit code to hook up tracepoint probesJosh Stone2009-03-061-4/+157
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * tapsets.cxx (tracepoint_arg): New (tracepoint_derived_probe): Add declaring header name and arg vector (dwarf_type_name): Build a type string for a given type DIE (tracepoint_derived_probe::build_args): Scan the function DIE for the name and type of formal parameters required by the tracepoint. (tracepoint_derived_probe::tracepoint_derived_probe): Call build_args and determine the relevant header to include. (tracepoint_derived_probe_group::emit_module_decls): For each tracepoint, include its header and declare a probe entry point with the right function signature. (tracepoint_derived_probe_group::emit_module_init): Call the registration for each tracepoint, and handle error unwinding. (tracepoint_derived_probe_group::emit_module_exit): Unregister each.
| * Build skeleton tracepoint probesJosh Stone2009-03-061-4/+79
| | | | | | | | | | | | * tapsets.cxx (tracepoint_derived_probe): Create a skeleton probe (tracepoint_derived_probe_group): Create a skeleton group (tracepoint_query::handle_query_func): build a probe
| * Scan tracequery.ko for tracepointsJosh Stone2009-03-061-1/+79
| | | | | | | | | | | | | | * tapsets.cxx (tracepoint_query): Iterate over the modules, CUs, and functions in tracequery.ko looking for our hijacked tracepoint declarations. (tracepoint_builder::build): Run a tracepoint_query
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