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* staptree.{h,cxx} (probe_alias): New structure.
* parse.{h,cxx} (parser::parse): Parse probes or probe aliases.
(parser::parse_probe): Likewise.
* tapsets.{h,cxx}:
(derived_probe_builder):
(match_key):
(match_node):
(alias_derived_probe): Move from here,
* elaborate.{h,cxx}: to here.
* elaborate.h (systemtap_session::pattern_root): New member.
(register_library_aliases): New function.
* tapsets.cxx: Build one dwarf_derived_probe per target address.
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* tapsets.cxx
(probe_type): New enum.
(probe_spec): New struct.
(dwarf_derived_probe): Reorganize a bit, interpret .return.
(query_statement): Translate addresses back to module space.
(probe_entry_function_name):
(probe_entry_struct_kprobe_name):
(foreach_dwarf_probe_entry):
(declare_dwarf_kernel_entry):
(deregister_dwarf_kernel_entry):
(register_dwarf_kernel_entry):
(register_dwarf_module):
(declare_dwarf_module_entry):
(deregister_dwarf_module_entry):
(register_dwarf_module_entry): New functions.
(dwarf_derived_probes::emit_probe_entries):
(dwarf_derived_probes::emit_registrations):
(dwarf_derived_probes::emit_deregistrations): Implement.
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* config.in, configure: Regenerated.
* tapsets.cxx: Make dwarf code conditional on new elfutils header.
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* configure.ac: Scan for libdwfl.
* staptree.h (verbose): New global.
* main.cxx (usage, main): Implement -v option.
* tapsets.cxx (dwflpp): New struct.
(query_statement): New function.
(query_function): New function.
(query_cu): New function.
(query_module): New function.
(dwarf_derived_probe): Implement primary forms.
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* tapsets.h: New file.
(derived_probe_builder): Callback for making derived probes.
(match_key): Component of pattern-matching tree.
(match_node): Other component of pattern-matching tree.
* tapsets.cxx: Add pattern-matching system for probes.
(alias_derived_probe): Skeleton for alias probes.
(dwarf_derived_probe): Skeleton for dwarf probes.
(register_standard_tapsets): Registry for standard tapsets.
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Start separating out translator-side probe point recognition.
* tapsets.cxx: New file.
(be_derived_probe): Support for begin/end probes.
(derive_probe): Ditto. Reject anything unrecognized.
* translator.cxx: Move out old code.
* Makefile.am: Add new source file.
* testsuite/semok/*: Switch to begin/end probes only.
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