diff options
Diffstat (limited to 'translate.cxx')
| -rw-r--r-- | translate.cxx | 123 |
1 files changed, 46 insertions, 77 deletions
diff --git a/translate.cxx b/translate.cxx index 2c1cb84c..84361eec 100644 --- a/translate.cxx +++ b/translate.cxx @@ -4359,16 +4359,29 @@ get_symbols (Dwfl_Module *m, return DWARF_CB_OK; } -int -emit_symbol_data_from_debuginfo(systemtap_session& s, ofstream& kallsyms_out) + +void +emit_symbol_data (systemtap_session& s) { - static char debuginfo_path_arr[] = "-:.debug:/usr/lib/debug:build"; + ofstream kallsyms_out ((s.tmpdir + "/stap-symbols.h").c_str()); + s.op->newline() << "\n\n#include \"stap-symbols.h\""; + + if (s.verbose > 1) + { + std::set<std::string>::iterator it = s.unwindsym_modules.begin(); + clog << "unwindsym modules: "; + while (it != s.unwindsym_modules.end()) + { + clog << *(it++) << " "; + } + clog << endl; + } + + static char debuginfo_path_arr[] = "-:.debug:/usr/lib/debug"; static char *debuginfo_env_arr = getenv("SYSTEMTAP_DEBUGINFO_PATH"); static char *debuginfo_path = (debuginfo_env_arr ? debuginfo_env_arr : debuginfo_path_arr); - static const char *debug_path = (debuginfo_env_arr ? - debuginfo_env_arr : s.kernel_release.c_str()); static const Dwfl_Callbacks kernel_callbacks = { @@ -4378,75 +4391,31 @@ emit_symbol_data_from_debuginfo(systemtap_session& s, ofstream& kallsyms_out) & debuginfo_path }; - Dwfl *dwfl = dwfl_begin (&kernel_callbacks); - if (!dwfl) - throw semantic_error ("cannot open dwfl"); - dwfl_report_begin (dwfl); - - int rc = dwfl_linux_kernel_report_offline (dwfl, - debug_path, - kernel_filter); - dwfl_report_end (dwfl, NULL, NULL); - if (rc < 0) - return rc; - - dwfl_getmodules (dwfl, &get_symbols, NULL, 0); - dwfl_end(dwfl); - - int i = 0; - map< Dwarf_Addr, string>::iterator pos; - kallsyms_out << "struct _stp_symbol _stp_kernel_symbols [] = {"; - for (pos = addrmap.begin(); pos != addrmap.end(); pos++) { - kallsyms_out << " { 0x" << hex << pos->first << ", " << "\"" << pos->second << "\" },\n"; - i++; - } - - kallsyms_out << "};\n"; - kallsyms_out << "unsigned _stp_num_kernel_symbols = " << dec << i << ";\n"; - return i == 0; -} - -int -emit_symbol_data (systemtap_session& s) -{ - unsigned i=0; - char kallsyms_outbuf [4096]; - ofstream kallsyms_out ((s.tmpdir + "/stap-symbols.h").c_str()); - kallsyms_out.rdbuf()->pubsetbuf (kallsyms_outbuf, - sizeof(kallsyms_outbuf)); - s.op->newline() << "\n\n#include \"stap-symbols.h\""; - - // FIXME for non-debuginfo use. - if (true) { - return emit_symbol_data_from_debuginfo(s, kallsyms_out); - } else { - // For symbol-table only operation, we don't have debuginfo, - // so parse /proc/kallsyms. - - ifstream kallsyms("/proc/kallsyms"); - string lastaddr, modules_op_addr; - - kallsyms_out << "struct _stp_symbol _stp_kernel_symbols [] = {"; - while (! kallsyms.eof()) - { - string addr, type, sym; - kallsyms >> addr >> type >> sym >> ws; - - if (kallsyms.peek() == '[') - break; - - // NB: kallsyms includes some duplicate addresses - if ((type == "t" || type == "T" || type == "A" || sym == "modules_op") && lastaddr != addr) - { - kallsyms_out << " { 0x" << addr << ", " << "\"" << sym << "\" },\n"; - lastaddr = addr; - i ++; - } - } - kallsyms_out << "};\n"; - kallsyms_out << "unsigned _stp_num_kernel_symbols = " << i << ";\n"; + Dwfl *dwfl = dwfl_begin (&kernel_callbacks); + if (!dwfl) + throw semantic_error ("cannot open dwfl"); + dwfl_report_begin (dwfl); + + int rc = dwfl_linux_kernel_report_offline (dwfl, + s.kernel_release.c_str(), + kernel_filter); + dwfl_report_end (dwfl, NULL, NULL); + if (rc < 0) + throw semantic_error ("dwfl rc"); + + dwfl_getmodules (dwfl, &get_symbols, NULL, 0); + dwfl_end(dwfl); + + int i = 0; + map< Dwarf_Addr, string>::iterator pos; + kallsyms_out << "struct _stp_symbol _stp_kernel_symbols [] = {"; + for (pos = addrmap.begin(); pos != addrmap.end(); pos++) { + kallsyms_out << " { 0x" << hex << pos->first << ", " << "\"" << pos->second << "\" },\n"; + i++; } - return (i == 0); + + kallsyms_out << "};\n"; + kallsyms_out << "unsigned _stp_num_kernel_symbols = " << dec << i << ";\n"; } @@ -4612,16 +4581,16 @@ translate_pass (systemtap_session& s) s.up->emit_global_param (s.globals[i]); } - s.op->newline() << "MODULE_DESCRIPTION(\"systemtap probe\");"; - s.op->newline() << "MODULE_LICENSE(\"GPL\");"; // XXX + emit_symbol_data (s); + + s.op->newline() << "MODULE_DESCRIPTION(\"systemtap-generated probe\");"; + s.op->newline() << "MODULE_LICENSE(\"GPL\");"; } catch (const semantic_error& e) { s.print_error (e); } - rc |= emit_symbol_data (s); - s.op->line() << "\n"; delete s.op; |