Mercurial > hg > graal-compiler
view src/share/vm/compiler/disassembler.cpp @ 6196:3759236eea14
7167142: Consider a warning when finding a .hotspotrc or .hotspot_compiler file that isn't used
Summary: Send warnings to output stream
Reviewed-by: dholmes, fparain
author | kamg |
---|---|
date | Mon, 02 Jul 2012 10:54:17 -0400 |
parents | 3e23978ea0c3 |
children | 5a98bf7d847b b31471cdc53e 8c5333c80cfd |
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/* * Copyright (c) 2008, 2011, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #include "precompiled.hpp" #include "classfile/javaClasses.hpp" #include "code/codeCache.hpp" #include "compiler/disassembler.hpp" #include "gc_interface/collectedHeap.hpp" #include "memory/cardTableModRefBS.hpp" #include "runtime/fprofiler.hpp" #include "runtime/handles.inline.hpp" #include "runtime/stubCodeGenerator.hpp" #include "runtime/stubRoutines.hpp" #ifdef TARGET_ARCH_x86 # include "depChecker_x86.hpp" #endif #ifdef TARGET_ARCH_sparc # include "depChecker_sparc.hpp" #endif #ifdef TARGET_ARCH_zero # include "depChecker_zero.hpp" #endif #ifdef TARGET_ARCH_arm # include "depChecker_arm.hpp" #endif #ifdef TARGET_ARCH_ppc # include "depChecker_ppc.hpp" #endif #ifdef SHARK #include "shark/sharkEntry.hpp" #endif void* Disassembler::_library = NULL; bool Disassembler::_tried_to_load_library = false; // This routine is in the shared library: Disassembler::decode_func Disassembler::_decode_instructions = NULL; static const char hsdis_library_name[] = "hsdis-"HOTSPOT_LIB_ARCH; static const char decode_instructions_name[] = "decode_instructions"; #define COMMENT_COLUMN 40 LP64_ONLY(+8) /*could be an option*/ #define BYTES_COMMENT ";..." /* funky byte display comment */ bool Disassembler::load_library() { if (_decode_instructions != NULL) { // Already succeeded. return true; } if (_tried_to_load_library) { // Do not try twice. // To force retry in debugger: assign _tried_to_load_library=0 return false; } // Try to load it. char ebuf[1024]; char buf[JVM_MAXPATHLEN]; os::jvm_path(buf, sizeof(buf)); int jvm_offset = -1; int lib_offset = -1; { // Match "jvm[^/]*" in jvm_path. const char* base = buf; const char* p = strrchr(buf, '/'); if (p != NULL) lib_offset = p - base + 1; p = strstr(p ? p : base, "jvm"); if (p != NULL) jvm_offset = p - base; } // Find the disassembler shared library. // Search for several paths derived from libjvm, in this order: // 1. <home>/jre/lib/<arch>/<vm>/libhsdis-<arch>.so (for compatibility) // 2. <home>/jre/lib/<arch>/<vm>/hsdis-<arch>.so // 3. <home>/jre/lib/<arch>/hsdis-<arch>.so // 4. hsdis-<arch>.so (using LD_LIBRARY_PATH) if (jvm_offset >= 0) { // 1. <home>/jre/lib/<arch>/<vm>/libhsdis-<arch>.so strcpy(&buf[jvm_offset], hsdis_library_name); strcat(&buf[jvm_offset], os::dll_file_extension()); _library = os::dll_load(buf, ebuf, sizeof ebuf); if (_library == NULL) { // 2. <home>/jre/lib/<arch>/<vm>/hsdis-<arch>.so strcpy(&buf[lib_offset], hsdis_library_name); strcat(&buf[lib_offset], os::dll_file_extension()); _library = os::dll_load(buf, ebuf, sizeof ebuf); } if (_library == NULL) { // 3. <home>/jre/lib/<arch>/hsdis-<arch>.so buf[lib_offset - 1] = '\0'; const char* p = strrchr(buf, '/'); if (p != NULL) { lib_offset = p - buf + 1; strcpy(&buf[lib_offset], hsdis_library_name); strcat(&buf[lib_offset], os::dll_file_extension()); _library = os::dll_load(buf, ebuf, sizeof ebuf); } } } if (_library == NULL) { // 4. hsdis-<arch>.so (using LD_LIBRARY_PATH) strcpy(&buf[0], hsdis_library_name); strcat(&buf[0], os::dll_file_extension()); _library = os::dll_load(buf, ebuf, sizeof ebuf); } if (_library != NULL) { _decode_instructions = CAST_TO_FN_PTR(Disassembler::decode_func, os::dll_lookup(_library, decode_instructions_name)); } _tried_to_load_library = true; if (_decode_instructions == NULL) { tty->print_cr("Could not load %s; %s; %s", buf, ((_library != NULL) ? "entry point is missing" : (WizardMode || PrintMiscellaneous) ? (const char*)ebuf : "library not loadable"), "PrintAssembly is disabled"); return false; } // Success. tty->print_cr("Loaded disassembler from %s", buf); return true; } class decode_env { private: nmethod* _nm; CodeBlob* _code; outputStream* _output; address _start, _end; char _option_buf[512]; char _print_raw; bool _print_pc; bool _print_bytes; address _cur_insn; int _total_ticks; int _bytes_per_line; // arch-specific formatting option static bool match(const char* event, const char* tag) { size_t taglen = strlen(tag); if (strncmp(event, tag, taglen) != 0) return false; char delim = event[taglen]; return delim == '\0' || delim == ' ' || delim == '/' || delim == '='; } void collect_options(const char* p) { if (p == NULL || p[0] == '\0') return; size_t opt_so_far = strlen(_option_buf); if (opt_so_far + 1 + strlen(p) + 1 > sizeof(_option_buf)) return; char* fillp = &_option_buf[opt_so_far]; if (opt_so_far > 0) *fillp++ = ','; strcat(fillp, p); // replace white space by commas: char* q = fillp; while ((q = strpbrk(q, " \t\n")) != NULL) *q++ = ','; // Note that multiple PrintAssemblyOptions flags accumulate with \n, // which we want to be changed to a comma... } void print_insn_labels(); void print_insn_bytes(address pc0, address pc); void print_address(address value); public: decode_env(CodeBlob* code, outputStream* output); address decode_instructions(address start, address end); void start_insn(address pc) { _cur_insn = pc; output()->bol(); print_insn_labels(); } void end_insn(address pc) { address pc0 = cur_insn(); outputStream* st = output(); if (_print_bytes && pc > pc0) print_insn_bytes(pc0, pc); if (_nm != NULL) { _nm->print_code_comment_on(st, COMMENT_COLUMN, pc0, pc); // this calls reloc_string_for which calls oop::print_value_on } // Output pc bucket ticks if we have any if (total_ticks() != 0) { address bucket_pc = FlatProfiler::bucket_start_for(pc); if (bucket_pc != NULL && bucket_pc > pc0 && bucket_pc <= pc) { int bucket_count = FlatProfiler::bucket_count_for(pc0); if (bucket_count != 0) { st->bol(); st->print_cr("%3.1f%% [%d]", bucket_count*100.0/total_ticks(), bucket_count); } } } } address handle_event(const char* event, address arg); outputStream* output() { return _output; } address cur_insn() { return _cur_insn; } int total_ticks() { return _total_ticks; } void set_total_ticks(int n) { _total_ticks = n; } const char* options() { return _option_buf; } }; decode_env::decode_env(CodeBlob* code, outputStream* output) { memset(this, 0, sizeof(*this)); _output = output ? output : tty; _code = code; if (code != NULL && code->is_nmethod()) _nm = (nmethod*) code; // by default, output pc but not bytes: _print_pc = true; _print_bytes = false; _bytes_per_line = Disassembler::pd_instruction_alignment(); // parse the global option string: collect_options(Disassembler::pd_cpu_opts()); collect_options(PrintAssemblyOptions); if (strstr(options(), "hsdis-")) { if (strstr(options(), "hsdis-print-raw")) _print_raw = (strstr(options(), "xml") ? 2 : 1); if (strstr(options(), "hsdis-print-pc")) _print_pc = !_print_pc; if (strstr(options(), "hsdis-print-bytes")) _print_bytes = !_print_bytes; } if (strstr(options(), "help")) { tty->print_cr("PrintAssemblyOptions help:"); tty->print_cr(" hsdis-print-raw test plugin by requesting raw output"); tty->print_cr(" hsdis-print-raw-xml test plugin by requesting raw xml"); tty->print_cr(" hsdis-print-pc turn off PC printing (on by default)"); tty->print_cr(" hsdis-print-bytes turn on instruction byte output"); tty->print_cr("combined options: %s", options()); } } address decode_env::handle_event(const char* event, address arg) { if (match(event, "insn")) { start_insn(arg); } else if (match(event, "/insn")) { end_insn(arg); } else if (match(event, "addr")) { if (arg != NULL) { print_address(arg); return arg; } } else if (match(event, "mach")) { static char buffer[32] = { 0, }; if (strcmp(buffer, (const char*)arg) != 0 || strlen((const char*)arg) > sizeof(buffer) - 1) { // Only print this when the mach changes strncpy(buffer, (const char*)arg, sizeof(buffer) - 1); output()->print_cr("[Disassembling for mach='%s']", arg); } } else if (match(event, "format bytes-per-line")) { _bytes_per_line = (int) (intptr_t) arg; } else { // ignore unrecognized markup } return NULL; } // called by the disassembler to print out jump targets and data addresses void decode_env::print_address(address adr) { outputStream* st = _output; if (adr == NULL) { st->print("NULL"); return; } int small_num = (int)(intptr_t)adr; if ((intptr_t)adr == (intptr_t)small_num && -1 <= small_num && small_num <= 9) { st->print("%d", small_num); return; } if (Universe::is_fully_initialized()) { if (StubRoutines::contains(adr)) { StubCodeDesc* desc = StubCodeDesc::desc_for(adr); if (desc == NULL) desc = StubCodeDesc::desc_for(adr + frame::pc_return_offset); if (desc != NULL) { st->print("Stub::%s", desc->name()); if (desc->begin() != adr) st->print("%+d 0x%p",adr - desc->begin(), adr); else if (WizardMode) st->print(" " PTR_FORMAT, adr); return; } st->print("Stub::<unknown> " PTR_FORMAT, adr); return; } BarrierSet* bs = Universe::heap()->barrier_set(); if (bs->kind() == BarrierSet::CardTableModRef && adr == (address)((CardTableModRefBS*)(bs))->byte_map_base) { st->print("word_map_base"); if (WizardMode) st->print(" " INTPTR_FORMAT, (intptr_t)adr); return; } oop obj; if (_nm != NULL && (obj = _nm->embeddedOop_at(cur_insn())) != NULL && (address) obj == adr && Universe::heap()->is_in(obj) && Universe::heap()->is_in(obj->klass())) { julong c = st->count(); obj->print_value_on(st); if (st->count() == c) { // No output. (Can happen in product builds.) st->print("(a %s)", Klass::cast(obj->klass())->external_name()); } return; } } // Fall through to a simple (hexadecimal) numeral. st->print(PTR_FORMAT, adr); } void decode_env::print_insn_labels() { address p = cur_insn(); outputStream* st = output(); CodeBlob* cb = _code; if (cb != NULL) { cb->print_block_comment(st, p); } if (_print_pc) { st->print(" " PTR_FORMAT ": ", p); } } void decode_env::print_insn_bytes(address pc, address pc_limit) { outputStream* st = output(); size_t incr = 1; size_t perline = _bytes_per_line; if ((size_t) Disassembler::pd_instruction_alignment() >= sizeof(int) && !((uintptr_t)pc % sizeof(int)) && !((uintptr_t)pc_limit % sizeof(int))) { incr = sizeof(int); if (perline % incr) perline += incr - (perline % incr); } while (pc < pc_limit) { // tab to the desired column: st->move_to(COMMENT_COLUMN); address pc0 = pc; address pc1 = pc + perline; if (pc1 > pc_limit) pc1 = pc_limit; for (; pc < pc1; pc += incr) { if (pc == pc0) st->print(BYTES_COMMENT); else if ((uint)(pc - pc0) % sizeof(int) == 0) st->print(" "); // put out a space on word boundaries if (incr == sizeof(int)) st->print("%08lx", *(int*)pc); else st->print("%02x", (*pc)&0xFF); } st->cr(); } } static void* event_to_env(void* env_pv, const char* event, void* arg) { decode_env* env = (decode_env*) env_pv; return env->handle_event(event, (address) arg); } static int printf_to_env(void* env_pv, const char* format, ...) { decode_env* env = (decode_env*) env_pv; outputStream* st = env->output(); size_t flen = strlen(format); const char* raw = NULL; if (flen == 0) return 0; if (flen == 1 && format[0] == '\n') { st->bol(); return 1; } if (flen < 2 || strchr(format, '%') == NULL) { raw = format; } else if (format[0] == '%' && format[1] == '%' && strchr(format+2, '%') == NULL) { // happens a lot on machines with names like %foo flen--; raw = format+1; } if (raw != NULL) { st->print_raw(raw, (int) flen); return (int) flen; } va_list ap; va_start(ap, format); julong cnt0 = st->count(); st->vprint(format, ap); julong cnt1 = st->count(); va_end(ap); return (int)(cnt1 - cnt0); } address decode_env::decode_instructions(address start, address end) { _start = start; _end = end; assert(((((intptr_t)start | (intptr_t)end) % Disassembler::pd_instruction_alignment()) == 0), "misaligned insn addr"); const int show_bytes = false; // for disassembler debugging //_version = Disassembler::pd_cpu_version(); if (!Disassembler::can_decode()) { return NULL; } // decode a series of instructions and return the end of the last instruction if (_print_raw) { // Print whatever the library wants to print, w/o fancy callbacks. // This is mainly for debugging the library itself. FILE* out = stdout; FILE* xmlout = (_print_raw > 1 ? out : NULL); return (address) (*Disassembler::_decode_instructions)(start, end, NULL, (void*) xmlout, NULL, (void*) out, options()); } return (address) (*Disassembler::_decode_instructions)(start, end, &event_to_env, (void*) this, &printf_to_env, (void*) this, options()); } void Disassembler::decode(CodeBlob* cb, outputStream* st) { if (!load_library()) return; decode_env env(cb, st); env.output()->print_cr("Decoding CodeBlob " PTR_FORMAT, cb); env.decode_instructions(cb->code_begin(), cb->code_end()); } void Disassembler::decode(address start, address end, outputStream* st) { if (!load_library()) return; decode_env env(CodeCache::find_blob_unsafe(start), st); env.decode_instructions(start, end); } void Disassembler::decode(nmethod* nm, outputStream* st) { if (!load_library()) return; decode_env env(nm, st); env.output()->print_cr("Decoding compiled method " PTR_FORMAT ":", nm); env.output()->print_cr("Code:"); #ifdef SHARK SharkEntry* entry = (SharkEntry *) nm->code_begin(); unsigned char* p = entry->code_start(); unsigned char* end = entry->code_limit(); #else unsigned char* p = nm->code_begin(); unsigned char* end = nm->code_end(); #endif // SHARK // If there has been profiling, print the buckets. if (FlatProfiler::bucket_start_for(p) != NULL) { unsigned char* p1 = p; int total_bucket_count = 0; while (p1 < end) { unsigned char* p0 = p1; p1 += pd_instruction_alignment(); address bucket_pc = FlatProfiler::bucket_start_for(p1); if (bucket_pc != NULL && bucket_pc > p0 && bucket_pc <= p1) total_bucket_count += FlatProfiler::bucket_count_for(p0); } env.set_total_ticks(total_bucket_count); } // Print constant table. if (nm->consts_size() > 0) { nm->print_nmethod_labels(env.output(), nm->consts_begin()); int offset = 0; for (address p = nm->consts_begin(); p < nm->consts_end(); p += 4, offset += 4) { if ((offset % 8) == 0) { env.output()->print_cr(" " PTR_FORMAT " (offset: %4d): " PTR32_FORMAT " " PTR64_FORMAT, p, offset, *((int32_t*) p), *((int64_t*) p)); } else { env.output()->print_cr(" " PTR_FORMAT " (offset: %4d): " PTR32_FORMAT, p, offset, *((int32_t*) p)); } } } env.decode_instructions(p, end); }