зеркало из https://github.com/github/ruby.git
Directly link libcapstone for easier development
This lets us use libcapstone directly from miniruby so we don't need a
Ruby Gem to to dev work.
Example usage:
```ruby
def foo(x)
if x < 1
"wow"
else
"neat"
end
end
iseq = RubyVM::InstructionSequence.of(method(:foo))
puts UJIT.disasm(iseq)
100.times { foo 1 }
puts UJIT.disasm(iseq)
```
Then in the terminal
```
$ ./miniruby test.rb
== disasm: #<ISeq:foo@test.rb:1 (1,0)-(7,3)> (catch: FALSE)
local table (size: 1, argc: 1 [opts: 0, rest: -1, post: 0, block: -1, kw: -1@-1, kwrest: -1])
[ 1] x@0<Arg>
0000 getlocal_WC_0 x@0 ( 2)[LiCa]
0002 putobject_INT2FIX_1_
0003 opt_lt <calldata!mid:<, argc:1, ARGS_SIMPLE>
0005 branchunless 10
0007 putstring "wow" ( 3)[Li]
0009 leave ( 7)[Re]
0010 putstring "neat" ( 5)[Li]
0012 leave ( 7)[Re]
== ISEQ RANGE: 10 -> 10 ========================================================
0x0: movabs rax, 0x7fe816e2d1a0
0xa: mov qword ptr [rdi], rax
0xd: mov r8, rax
0x10: mov r9, rax
0x13: mov r11, r12
0x16: jmp qword ptr [rax]
== ISEQ RANGE: 0 -> 7 ==========================================================
0x0: mov rax, qword ptr [rdi + 0x20]
0x4: mov rax, qword ptr [rax - 0x18]
0x8: mov qword ptr [rdx], rax
0xb: mov qword ptr [rdx + 8], 3
0x13: movabs rax, 0x7fe817808200
0x1d: test byte ptr [rax + 0x3e6], 1
0x24: jne 0x3ffff7b
0x2a: test byte ptr [rdx], 1
0x2d: je 0x3ffff7b
0x33: test byte ptr [rdx + 8], 1
0x37: je 0x3ffff7b
0x3d: mov rax, qword ptr [rdx]
0x40: cmp rax, qword ptr [rdx + 8]
0x44: movabs rax, 0
0x4e: movabs rcx, 0x14
0x58: cmovl rax, rcx
0x5c: mov qword ptr [rdx], rax
0x5f: test qword ptr [rdx], -9
0x66: jne 0x3ffffd5
```
Make sure to `brew install pkg-config capstone`
This commit is contained in:
Aaron Patterson
Alan Wu
Родитель
dea4db16c0
Коммит
e427fdff0a
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@ -1063,6 +1063,7 @@ BUILTIN_RB_SRCS = \
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$(srcdir)/nilclass.rb \
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$(srcdir)/prelude.rb \
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$(srcdir)/gem_prelude.rb \
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$(srcdir)/ujit.rb \
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$(empty)
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BUILTIN_RB_INCS = $(BUILTIN_RB_SRCS:.rb=.rbinc)
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@ -15641,6 +15642,7 @@ ujit_core.$(OBJEXT): {$(VPATH)}vm_core.h
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ujit_core.$(OBJEXT): {$(VPATH)}vm_debug.h
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ujit_core.$(OBJEXT): {$(VPATH)}vm_opts.h
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ujit_core.$(OBJEXT): {$(VPATH)}vm_sync.h
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ujit_iface.$(OBJEXT): {$(VPATH)}ujit.rbinc
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ujit_iface.$(OBJEXT): $(CCAN_DIR)/check_type/check_type.h
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ujit_iface.$(OBJEXT): $(CCAN_DIR)/container_of/container_of.h
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ujit_iface.$(OBJEXT): $(CCAN_DIR)/list/list.h
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11
configure.ac
11
configure.ac
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@ -1229,6 +1229,17 @@ AC_CHECK_LIB(dl, dlopen) # Dynamic linking for SunOS/Solaris and SYSV
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AC_CHECK_LIB(dld, shl_load) # Dynamic linking for HP-UX
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AC_CHECK_LIB(socket, shutdown) # SunOS/Solaris
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if pkg-config --exists capstone; then
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CAPSTONE_CFLAGS=`pkg-config --cflags capstone`
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CAPSTONE_LIB_L=`pkg-config --libs-only-L capstone`
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LDFLAGS="$LDFLAGS $CAPSTONE_LIB_L"
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CFLAGS="$CFLAGS $CAPSTONE_CFLAGS"
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else
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AC_MSG_ERROR(Please install capstone and pkg-config)
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fi
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AC_CHECK_LIB(capstone, cs_open) # Capstone
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dnl Checks for header files.
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AC_HEADER_DIRENT
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dnl AC_HEADER_STDC has been checked in AC_USE_SYSTEM_EXTENSIONS
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1
inits.c
1
inits.c
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@ -99,6 +99,7 @@ rb_call_builtin_inits(void)
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BUILTIN(timev);
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BUILTIN(nilclass);
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BUILTIN(marshal);
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BUILTIN(ujit);
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Init_builtin_prelude();
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}
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#undef CALL
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@ -1,35 +0,0 @@
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begin
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require "crabstone"
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require "stringio"
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rescue LoadError => e
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puts "Please install crabstone, which is needed by the disassembler:"
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puts " $ brew install capstone"
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puts " $ gem install capstone"
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raise e
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end
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module UJIT
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def self.disasm(iseq)
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blocks = UJIT.blocks_for(iseq)
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return if blocks.empty?
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io = StringIO.new
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cs = Crabstone::Disassembler.new(Crabstone::ARCH_X86, Crabstone::MODE_64)
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io.puts iseq.disasm
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blocks.sort_by(&:address).reverse.each do |block|
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io.puts "== ISEQ RANGE: #{block.iseq_start_index} -> #{block.iseq_end_index} ".ljust(80, "=")
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cs.disasm(block.code, 0).each do |i|
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io.printf(
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"\t0x%<address>x:\t%<instruction>s\t%<details>s\n",
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address: i.address,
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instruction: i.mnemonic,
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details: i.op_str
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)
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end
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end
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io.string
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end
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end
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@ -0,0 +1,31 @@
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module UJIT
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def omg
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end
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def self.disasm(iseq)
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blocks = UJIT.blocks_for(iseq)
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return if blocks.empty?
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str = ""
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cs = UJIT::Disasm.open(UJIT::Disasm::ARCH_X86, UJIT::Disasm::MODE_64)
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str << iseq.disasm
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str << "\n"
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blocks.sort_by(&:address).reverse.each do |block|
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str << "== ISEQ RANGE: #{block.iseq_start_index} -> #{block.iseq_end_index} ".ljust(80, "=")
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str << "\n"
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cs.disasm(block.code, 0).each do |i|
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str << sprintf(
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"\t0x%<address>x:\t%<instruction>s\t%<details>s\n",
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address: i.address,
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instruction: i.mnemonic,
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details: i.op_str
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)
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end
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end
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str
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end
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end
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48
ujit_iface.c
48
ujit_iface.c
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@ -13,8 +13,12 @@
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#include "ujit_codegen.h"
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#include "ujit_core.h"
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#include "ujit_hooks.inc"
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#include "ujit.rbinc"
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#include <capstone/capstone.h>
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VALUE cUjitBlock;
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VALUE cUjitDisasm;
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VALUE cUjitDisasmInsn;
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extern st_table * version_tbl;
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extern codeblock_t *cb;
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@ -25,6 +29,12 @@ static const rb_data_type_t ujit_block_type = {
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0, 0, RUBY_TYPED_FREE_IMMEDIATELY
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};
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static const rb_data_type_t ujit_disasm_type = {
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"UJIT/Disasm",
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{0, (void(*)(void *))cs_close, 0, },
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0, 0, RUBY_TYPED_FREE_IMMEDIATELY
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};
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bool rb_ujit_enabled;
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// Hash table of encoded instructions
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@ -366,6 +376,36 @@ iseq_end_index(VALUE self)
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return INT2NUM(block->end_idx);
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}
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static VALUE
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ujit_disasm_open(VALUE mod, VALUE arch, VALUE mode)
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{
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csh * handle;
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VALUE disasm = TypedData_Make_Struct(cUjitDisasm, csh, &ujit_disasm_type, handle);
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cs_open(NUM2INT(arch), NUM2INT(mode), handle);
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return disasm;
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}
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static VALUE
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ujit_disasm(VALUE self, VALUE code, VALUE from)
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{
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size_t count;
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csh * handle;
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cs_insn *insns;
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TypedData_Get_Struct(self, csh, &ujit_disasm_type, handle);
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count = cs_disasm(*handle, StringValuePtr(code), RSTRING_LEN(code), NUM2INT(from), 0, &insns);
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VALUE insn_list = rb_ary_new_capa(count);
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for (size_t i = 0; i < count; i++) {
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VALUE vals = rb_ary_new_from_args(3, LONG2NUM(insns[i].address),
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rb_str_new2(insns[i].mnemonic),
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rb_str_new2(insns[i].op_str));
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rb_ary_push(insn_list, rb_struct_alloc(cUjitDisasmInsn, vals));
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}
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cs_free(insns, count);
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return insn_list;
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}
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void
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rb_ujit_init(void)
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{
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@ -389,6 +429,14 @@ rb_ujit_init(void)
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rb_define_method(cUjitBlock, "iseq_start_index", iseq_start_index, 0);
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rb_define_method(cUjitBlock, "iseq_end_index", iseq_end_index, 0);
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cUjitDisasm = rb_define_class_under(mUjit, "Disasm", rb_cObject);
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rb_define_const(cUjitDisasm, "ARCH_X86", INT2NUM(CS_ARCH_X86));
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rb_define_const(cUjitDisasm, "MODE_64", INT2NUM(CS_MODE_64));
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rb_define_module_function(cUjitDisasm, "open", ujit_disasm_open, 2);
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rb_define_method(cUjitDisasm, "disasm", ujit_disasm, 2);
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cUjitDisasmInsn = rb_struct_define_under(cUjitDisasm, "Insn", "address", "mnemonic", "op_str", NULL);
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// Initialize the GC hooks
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method_lookup_dependency = st_init_numtable();
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struct ujit_root_struct *root;
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