diff options
Diffstat (limited to 'tapsets.cxx')
| -rw-r--r-- | tapsets.cxx | 60 |
1 files changed, 22 insertions, 38 deletions
diff --git a/tapsets.cxx b/tapsets.cxx index 53f8ace5..03239ad6 100644 --- a/tapsets.cxx +++ b/tapsets.cxx @@ -3509,7 +3509,7 @@ private: bool get_next_probe(); void convert_probe(probe *base); - void record_semaphore(vector<derived_probe *> & results); + void record_semaphore(vector<derived_probe *> & results, unsigned start); void convert_location(probe *base, probe_point *location); }; @@ -3560,11 +3560,8 @@ sdt_query::handle_query_module() unsigned i = results.size(); if (probe_type == kprobe_type || probe_type == utrace_type) - { - derive_probes(sess, new_base, results); - record_semaphore(results); - } - + derive_probes(sess, new_base, results); + else { literal_map_t params; @@ -3577,9 +3574,10 @@ sdt_query::handle_query_module() dwarf_query q(new_base, new_location, dw, params, results); q.has_mark = true; // enables mid-statement probing dw.iterate_over_modules(&query_module, &q); - record_semaphore(results); } + record_semaphore(results, i); + if (sess.listing_mode) { // restore the locations to print a nicer probe name @@ -3709,24 +3707,13 @@ sdt_query::get_next_probe() void -sdt_query::record_semaphore (vector<derived_probe *> & results) +sdt_query::record_semaphore (vector<derived_probe *> & results, unsigned start) { - int sym_count = dwfl_module_getsymtab(dw.module); - assert (sym_count >= 0); - for (int i = 0; i < sym_count; i++) - { - GElf_Sym sym; - GElf_Word shndxp; - char *sym_str = (char*)dwfl_module_getsym (dw.module, i, &sym, &shndxp); - if (strcmp(sym_str, string(probe_name + "_semaphore").c_str()) == 0) - { - string process_name; - derived_probe_builder::get_param(params, TOK_PROCESS, process_name); - for (unsigned int i = 0; i < results.size(); ++i) - sess.sdt_semaphore_addr.insert(make_pair(sym.st_value, results[i])); - break; - } - } + string semaphore = probe_name + "_semaphore"; + Dwarf_Addr addr = lookup_symbol_address(dw.module, semaphore.c_str()); + if (addr) + for (unsigned i = start; i < results.size(); ++i) + sess.sdt_semaphore_addr.insert(make_pair(results[i], addr)); } @@ -4471,22 +4458,16 @@ uprobe_derived_probe_group::emit_module_decls (systemtap_session& s) s.op->line() << " .address=(unsigned long)0x" << hex << p->addr << dec << "ULL,"; s.op->line() << " .pp=" << lex_cast_qstring (*p->sole_location()) << ","; s.op->line() << " .ph=&" << p->name << ","; - map<Dwarf_Addr, derived_probe*>::iterator its; - if (s.sdt_semaphore_addr.empty()) + + map<derived_probe*, Dwarf_Addr>::iterator its = s.sdt_semaphore_addr.find(p); + if (its == s.sdt_semaphore_addr.end()) s.op->line() << " .sdt_sem_address=(unsigned long)0x0,"; else - for (its = s.sdt_semaphore_addr.begin(); - its != s.sdt_semaphore_addr.end(); - its++) - { - if (p->module == ((struct uprobe_derived_probe*)(its->second))->module - && p->addr == ((struct uprobe_derived_probe*)(its->second))->addr) - { - s.op->line() << " .sdt_sem_address=(unsigned long)0x" << hex << its->first << dec << "ULL,"; - break; - } - } - if (p->has_return) s.op->line() << " .return_p=1,"; + s.op->line() << " .sdt_sem_address=(unsigned long)0x" + << hex << its->second << dec << "ULL,"; + + if (p->has_return) + s.op->line() << " .return_p=1,"; s.op->line() << " },"; } s.op->newline(-1) << "};"; @@ -4642,6 +4623,7 @@ uprobe_derived_probe_group::emit_module_decls (systemtap_session& s) //---------- s.op->newline() << "if (sups->sdt_sem_address != 0) {"; s.op->newline(1) << "size_t sdt_semaphore;"; + // XXX sups could get registered to more than one task! s.op->newline() << "sups->tsk = tsk;"; s.op->newline() << "__access_process_vm (tsk, relocation + sups->sdt_sem_address, &sdt_semaphore, sizeof (sdt_semaphore), 0);"; s.op->newline() << "sdt_semaphore += 1;"; @@ -4736,6 +4718,7 @@ uprobe_derived_probe_group::emit_module_decls (systemtap_session& s) //---------- s.op->newline() << "if (sups->sdt_sem_address != 0) {"; s.op->newline(1) << "size_t sdt_semaphore;"; + // XXX sups could get registered to more than one task! s.op->newline() << "sups->tsk = tsk;"; s.op->newline() << "__access_process_vm (tsk, sups->sdt_sem_address, &sdt_semaphore, sizeof (sdt_semaphore), 0);"; s.op->newline() << "sdt_semaphore += 1;"; @@ -4869,6 +4852,7 @@ uprobe_derived_probe_group::emit_module_exit (systemtap_session& s) //---------- s.op->newline() << "if (sups->sdt_sem_address != 0) {"; s.op->newline(1) << "size_t sdt_semaphore;"; + // XXX sups could get registered to more than one task! s.op->newline() << "__access_process_vm (sups->tsk, sups->sdt_sem_address, &sdt_semaphore, sizeof (sdt_semaphore), 0);"; s.op->newline() << "sdt_semaphore -= 1;"; s.op->newline() << "__access_process_vm (sups->tsk, sups->sdt_sem_address, &sdt_semaphore, sizeof (sdt_semaphore), 1);"; |