From 55aa24fb2eb147288fec359a99e960f7136336e8 Mon Sep 17 00:00:00 2001 From: Sergio Durigan Junior Date: Fri, 27 Apr 2012 20:47:57 +0000 Subject: 2012-04-27 Sergio Durigan Junior Tom Tromey Jan Kratochvil * Makefile.in (SFILES): Add `probe' and `stap-probe'. (COMMON_OBS): Likewise. (HFILES_NO_SRCDIR): Add `probe'. * NEWS: Mention support for static and SystemTap probes. * amd64-tdep.c (amd64_init_abi): Initializing proper fields used by SystemTap probes' arguments parser. * arm-linux-tdep.c: Including headers needed to perform the parsing of SystemTap probes' arguments. (arm_stap_is_single_operand): New function. (arm_stap_parse_special_token): Likewise. (arm_linux_init_abi): Initializing proper fields used by SystemTap probes' arguments parser. * ax-gdb.c (require_rvalue): Removing static declaration. (gen_expr): Likewise. * ax-gdb.h (gen_expr): Declaring function. (require_rvalue): Likewise. * breakpoint.c: Include `gdb_regex.h' and `probe.h'. (bkpt_probe_breakpoint_ops): New variable. (momentary_breakpoint_from_master): Set the `probe' value. (add_location_to_breakpoint): Likewise. (break_command_1): Using proper breakpoint_ops according to the argument passed by the user in the command line. (bkpt_probe_insert_location): New function. (bkpt_probe_remove_location): Likewise. (bkpt_probe_create_sals_from_address): Likewise. (bkpt_probe_decode_linespec): Likewise. (tracepoint_probe_create_sals_from_address): Likewise. (tracepoint_probe_decode_linespec): Likewise. (tracepoint_probe_breakpoint_ops): New variable. (trace_command): Using proper breakpoint_ops according to the argument passed by the user in the command line. (initialize_breakpoint_ops): Initializing breakpoint_ops for static probes on breakpoints and tracepoints. * breakpoint.h (struct bp_location) : New field. * cli-utils.c (skip_spaces_const): New function. (extract_arg): Likewise. * cli-utils.h (skip_spaces_const): Likewise. (extract_arg): Likewise. * coffread.c (coff_sym_fns): Add `sym_probe_fns' value. * configure.ac: Append `stap-probe.o' to be generated when ELF support is present. * configure: Regenerate. * dbxread.c (aout_sym_fns): Add `sym_probe_fns' value. * elfread.c: Include `probe.h' and `arch-utils.h'. (probe_key): New variable. (elf_get_probes): New function. (elf_get_probe_argument_count): Likewise. (elf_evaluate_probe_argument): Likewise. (elf_compile_to_ax): Likewise. (elf_symfile_relocate_probe): Likewise. (stap_probe_key_free): Likewise. (elf_probe_fns): New variable. (elf_sym_fns): Add `sym_probe_fns' value. (elf_sym_fns_lazy_psyms): Likewise. (elf_sym_fns_gdb_index): Likewise. (_initialize_elfread): Initialize objfile cache for static probes. * gdb_vecs.h (struct probe): New forward declaration. (probe_p): New VEC declaration. * gdbarch.c: Regenerate. * gdbarch.h: Regenerate. * gdbarch.sh (stap_integer_prefix): New variable. (stap_integer_suffix): Likewise. (stap_register_prefix): Likewise. (stap_register_suffix): Likewise. (stap_register_indirection_prefix): Likewise. (stap_register_indirection_suffix): Likewise. (stap_gdb_register_prefix): Likewise. (stap_gdb_register_suffix): Likewise. (stap_is_single_operand): New function. (stap_parse_special_token): Likewise. (struct stap_parse_info): Forward declaration. * i386-tdep.c: Including headers needed to perform the parsing of SystemTap probes' arguments. (i386_stap_is_single_operand): New function. (i386_stap_parse_special_token): Likewise. (i386_elf_init_abi): Initializing proper fields used by SystemTap probes' arguments parser. * i386-tdep.h (i386_stap_is_single_operand): New function. (i386_stap_parse_special_token): Likewise. * machoread.c (macho_sym_fns): Add `sym_probe_fns' value. * mipsread.c (ecoff_sym_fns): Likewise. * objfiles.c (objfile_relocate1): Support relocation for static probes. * parse.c (prefixify_expression): Remove static declaration. (initialize_expout): Likewise. (reallocate_expout): Likewise. * parser-defs.h (initialize_expout): Declare function. (reallocate_expout): Likewise. (prefixify_expression): Likewise. * ppc-linux-tdep.c: Including headers needed to perform the parsing of SystemTap probes' arguments. (ppc_stap_is_single_operand): New function. (ppc_stap_parse_special_token): Likewise. (ppc_linux_init_abi): Initializing proper fields used by SystemTap probes' arguments parser. * probe.c: New file, for generic statically defined probe support. * probe.h: Likewise. * s390-tdep.c: Including headers needed to perform the parsing of SystemTap probes' arguments. (s390_stap_is_single_operand): New function. (s390_gdbarch_init): Initializing proper fields used by SystemTap probes' arguments parser. * somread.c (som_sym_fns): Add `sym_probe_fns' value. * stap-probe.c: New file, for SystemTap probe support. * stap-probe.h: Likewise. * symfile.h: Include `gdb_vecs.h'. (struct sym_probe_fns): New struct. (struct sym_fns) : New field. * symtab.c (init_sal): Initialize `probe' field. * symtab.h (struct probe): Forward declaration. (struct symtab_and_line) : New field. * tracepoint.c (start_tracing): Adjust semaphore on breakpoints locations. (stop_tracing): Likewise. * xcoffread.c (xcoff_sym_fns): Add `sym_probe_fns' value. --- gdb/elfread.c | 120 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 120 insertions(+) (limited to 'gdb/elfread.c') diff --git a/gdb/elfread.c b/gdb/elfread.c index 117e674..d825d9a 100644 --- a/gdb/elfread.c +++ b/gdb/elfread.c @@ -36,6 +36,8 @@ #include "demangle.h" #include "psympriv.h" #include "filenames.h" +#include "probe.h" +#include "arch-utils.h" #include "gdbtypes.h" #include "value.h" #include "infcall.h" @@ -60,6 +62,10 @@ struct elfinfo asection *mdebugsect; /* Section pointer for .mdebug section */ }; +/* Per-objfile data for probe info. */ + +static const struct objfile_data *probe_key = NULL; + static void free_elfinfo (void *); /* Minimal symbols located at the GOT entries for .plt - that is the real @@ -1576,7 +1582,117 @@ elfstab_offset_sections (struct objfile *objfile, struct partial_symtab *pst) complaint (&symfile_complaints, _("elf/stab section information missing for %s"), filename); } + +/* Implementation of `sym_get_probes', as documented in symfile.h. */ + +static VEC (probe_p) * +elf_get_probes (struct objfile *objfile) +{ + VEC (probe_p) *probes_per_objfile; + + /* Have we parsed this objfile's probes already? */ + probes_per_objfile = objfile_data (objfile, probe_key); + + if (!probes_per_objfile) + { + int ix; + const struct probe_ops *probe_ops; + + /* Here we try to gather information about all types of probes from the + objfile. */ + for (ix = 0; VEC_iterate (probe_ops_cp, all_probe_ops, ix, probe_ops); + ix++) + probe_ops->get_probes (&probes_per_objfile, objfile); + + if (probes_per_objfile == NULL) + { + VEC_reserve (probe_p, probes_per_objfile, 1); + gdb_assert (probes_per_objfile != NULL); + } + + set_objfile_data (objfile, probe_key, probes_per_objfile); + } + + return probes_per_objfile; +} + +/* Implementation of `sym_get_probe_argument_count', as documented in + symfile.h. */ + +static unsigned +elf_get_probe_argument_count (struct objfile *objfile, + struct probe *probe) +{ + return probe->pops->get_probe_argument_count (probe, objfile); +} + +/* Implementation of `sym_evaluate_probe_argument', as documented in + symfile.h. */ + +static struct value * +elf_evaluate_probe_argument (struct objfile *objfile, + struct probe *probe, + unsigned n) +{ + return probe->pops->evaluate_probe_argument (probe, objfile, n); +} + +/* Implementation of `sym_compile_to_ax', as documented in symfile.h. */ + +static void +elf_compile_to_ax (struct objfile *objfile, + struct probe *probe, + struct agent_expr *expr, + struct axs_value *value, + unsigned n) +{ + probe->pops->compile_to_ax (probe, objfile, expr, value, n); +} + +/* Implementation of `sym_relocate_probe', as documented in symfile.h. */ + +static void +elf_symfile_relocate_probe (struct objfile *objfile, + struct section_offsets *new_offsets, + struct section_offsets *delta) +{ + int ix; + VEC (probe_p) *probes = objfile_data (objfile, probe_key); + struct probe *probe; + + for (ix = 0; VEC_iterate (probe_p, probes, ix, probe); ix++) + probe->pops->relocate (probe, ANOFFSET (delta, SECT_OFF_TEXT (objfile))); +} + +/* Helper function used to free the space allocated for storing SystemTap + probe information. */ + +static void +probe_key_free (struct objfile *objfile, void *d) +{ + int ix; + VEC (probe_p) *probes = d; + struct probe *probe; + + for (ix = 0; VEC_iterate (probe_p, probes, ix, probe); ix++) + probe->pops->destroy (probe); + + VEC_free (probe_p, probes); +} + + +/* Implementation `sym_probe_fns', as documented in symfile.h. */ + +static const struct sym_probe_fns elf_probe_fns = +{ + elf_get_probes, /* sym_get_probes */ + elf_get_probe_argument_count, /* sym_get_probe_argument_count */ + elf_evaluate_probe_argument, /* sym_evaluate_probe_argument */ + elf_compile_to_ax, /* sym_compile_to_ax */ + elf_symfile_relocate_probe, /* sym_relocate_probe */ +}; + /* Register that we are able to handle ELF object file formats. */ static const struct sym_fns elf_sym_fns = @@ -1591,6 +1707,7 @@ static const struct sym_fns elf_sym_fns = elf_symfile_segments, /* Get segment information from a file. */ NULL, default_symfile_relocate, /* Relocate a debug section. */ + &elf_probe_fns, /* sym_probe_fns */ &psym_functions }; @@ -1609,6 +1726,7 @@ static const struct sym_fns elf_sym_fns_lazy_psyms = elf_symfile_segments, /* Get segment information from a file. */ NULL, default_symfile_relocate, /* Relocate a debug section. */ + &elf_probe_fns, /* sym_probe_fns */ &psym_functions }; @@ -1626,6 +1744,7 @@ static const struct sym_fns elf_sym_fns_gdb_index = elf_symfile_segments, /* Get segment information from a file. */ NULL, default_symfile_relocate, /* Relocate a debug section. */ + &elf_probe_fns, /* sym_probe_fns */ &dwarf2_gdb_index_functions }; @@ -1642,6 +1761,7 @@ static const struct gnu_ifunc_fns elf_gnu_ifunc_fns = void _initialize_elfread (void) { + probe_key = register_objfile_data_with_cleanup (NULL, probe_key_free); add_symtab_fns (&elf_sym_fns); elf_objfile_gnu_ifunc_cache_data = register_objfile_data (); -- cgit v1.1