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Set up MachineDebugInfo to scan for debug information form "llvm.db"g globals. 

Global Variable information is now pulled from "llvm.dbg.globals"

llvm-svn: 25655
This commit is contained in:
Jim Laskey 2006-01-26 20:21:46 +00:00
parent 32b5f41f15
commit 0bbdc55333
6 changed files with 417 additions and 437 deletions
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409
llvm/include/llvm/CodeGen/DwarfWriter.h
View File

@ -27,415 +27,6 @@
namespace llvm {
//===--------------------------------------------------------------------===//
// Dwarf constants as gleaned from the DWARF Debugging Information Format V.3
// reference manual http://dwarf.freestandards.org .
//
enum dwarf_constants {
DWARF_VERSION = 2,
// Tags
DW_TAG_array_type = 0x01,
DW_TAG_class_type = 0x02,
DW_TAG_entry_point = 0x03,
DW_TAG_enumeration_type = 0x04,
DW_TAG_formal_parameter = 0x05,
DW_TAG_imported_declaration = 0x08,
DW_TAG_label = 0x0a,
DW_TAG_lexical_block = 0x0b,
DW_TAG_member = 0x0d,
DW_TAG_pointer_type = 0x0f,
DW_TAG_reference_type = 0x10,
DW_TAG_compile_unit = 0x11,
DW_TAG_string_type = 0x12,
DW_TAG_structure_type = 0x13,
DW_TAG_subroutine_type = 0x15,
DW_TAG_typedef = 0x16,
DW_TAG_union_type = 0x17,
DW_TAG_unspecified_parameters = 0x18,
DW_TAG_variant = 0x19,
DW_TAG_common_block = 0x1a,
DW_TAG_common_inclusion = 0x1b,
DW_TAG_inheritance = 0x1c,
DW_TAG_inlined_subroutine = 0x1d,
DW_TAG_module = 0x1e,
DW_TAG_ptr_to_member_type = 0x1f,
DW_TAG_set_type = 0x20,
DW_TAG_subrange_type = 0x21,
DW_TAG_with_stmt = 0x22,
DW_TAG_access_declaration = 0x23,
DW_TAG_base_type = 0x24,
DW_TAG_catch_block = 0x25,
DW_TAG_const_type = 0x26,
DW_TAG_constant = 0x27,
DW_TAG_enumerator = 0x28,
DW_TAG_file_type = 0x29,
DW_TAG_friend = 0x2a,
DW_TAG_namelist = 0x2b,
DW_TAG_namelist_item = 0x2c,
DW_TAG_packed_type = 0x2d,
DW_TAG_subprogram = 0x2e,
DW_TAG_template_type_parameter = 0x2f,
DW_TAG_template_value_parameter = 0x30,
DW_TAG_thrown_type = 0x31,
DW_TAG_try_block = 0x32,
DW_TAG_variant_part = 0x33,
DW_TAG_variable = 0x34,
DW_TAG_volatile_type = 0x35,
DW_TAG_dwarf_procedure = 0x36,
DW_TAG_restrict_type = 0x37,
DW_TAG_interface_type = 0x38,
DW_TAG_namespace = 0x39,
DW_TAG_imported_module = 0x3a,
DW_TAG_unspecified_type = 0x3b,
DW_TAG_partial_unit = 0x3c,
DW_TAG_imported_unit = 0x3d,
DW_TAG_condition = 0x3f,
DW_TAG_shared_type = 0x40,
DW_TAG_lo_user = 0x4080,
DW_TAG_hi_user = 0xffff,
// Children flag
DW_CHILDREN_no = 0x00,
DW_CHILDREN_yes = 0x01,
// Attributes
DW_AT_sibling = 0x01,
DW_AT_location = 0x02,
DW_AT_name = 0x03,
DW_AT_ordering = 0x09,
DW_AT_byte_size = 0x0b,
DW_AT_bit_offset = 0x0c,
DW_AT_bit_size = 0x0d,
DW_AT_stmt_list = 0x10,
DW_AT_low_pc = 0x11,
DW_AT_high_pc = 0x12,
DW_AT_language = 0x13,
DW_AT_discr = 0x15,
DW_AT_discr_value = 0x16,
DW_AT_visibility = 0x17,
DW_AT_import = 0x18,
DW_AT_string_length = 0x19,
DW_AT_common_reference = 0x1a,
DW_AT_comp_dir = 0x1b,
DW_AT_const_value = 0x1c,
DW_AT_containing_type = 0x1d,
DW_AT_default_value = 0x1e,
DW_AT_inline = 0x20,
DW_AT_is_optional = 0x21,
DW_AT_lower_bound = 0x22,
DW_AT_producer = 0x25,
DW_AT_prototyped = 0x27,
DW_AT_return_addr = 0x2a,
DW_AT_start_scope = 0x2c,
DW_AT_bit_stride = 0x2e,
DW_AT_upper_bound = 0x2f,
DW_AT_abstract_origin = 0x31,
DW_AT_accessibility = 0x32,
DW_AT_address_class = 0x33,
DW_AT_artificial = 0x34,
DW_AT_base_types = 0x35,
DW_AT_calling_convention = 0x36,
DW_AT_count = 0x37,
DW_AT_data_member_location = 0x38,
DW_AT_decl_column = 0x39,
DW_AT_decl_file = 0x3a,
DW_AT_decl_line = 0x3b,
DW_AT_declaration = 0x3c,
DW_AT_discr_list = 0x3d,
DW_AT_encoding = 0x3e,
DW_AT_external = 0x3f,
DW_AT_frame_base = 0x40,
DW_AT_friend = 0x41,
DW_AT_identifier_case = 0x42,
DW_AT_macro_info = 0x43,
DW_AT_namelist_item = 0x44,
DW_AT_priority = 0x45,
DW_AT_segment = 0x46,
DW_AT_specification = 0x47,
DW_AT_static_link = 0x48,
DW_AT_type = 0x49,
DW_AT_use_location = 0x4a,
DW_AT_variable_parameter = 0x4b,
DW_AT_virtuality = 0x4c,
DW_AT_vtable_elem_location = 0x4d,
DW_AT_allocated = 0x4e,
DW_AT_associated = 0x4f,
DW_AT_data_location = 0x50,
DW_AT_byte_stride = 0x51,
DW_AT_entry_pc = 0x52,
DW_AT_use_UTF8 = 0x53,
DW_AT_extension = 0x54,
DW_AT_ranges = 0x55,
DW_AT_trampoline = 0x56,
DW_AT_call_column = 0x57,
DW_AT_call_file = 0x58,
DW_AT_call_line = 0x59,
DW_AT_description = 0x5a,
DW_AT_binary_scale = 0x5b,
DW_AT_decimal_scale = 0x5c,
DW_AT_small = 0x5d,
DW_AT_decimal_sign = 0x5e,
DW_AT_digit_count = 0x5f,
DW_AT_picture_string = 0x60,
DW_AT_mutable = 0x61,
DW_AT_threads_scaled = 0x62,
DW_AT_explicit = 0x63,
DW_AT_object_pointer = 0x64,
DW_AT_endianity = 0x65,
DW_AT_elemental = 0x66,
DW_AT_pure = 0x67,
DW_AT_recursive = 0x68,
DW_AT_lo_user = 0x2000,
DW_AT_hi_user = 0x3fff,
// Attribute form encodings
DW_FORM_addr = 0x01,
DW_FORM_block2 = 0x03,
DW_FORM_block4 = 0x04,
DW_FORM_data2 = 0x05,
DW_FORM_data4 = 0x06,
DW_FORM_data8 = 0x07,
DW_FORM_string = 0x08,
DW_FORM_block = 0x09,
DW_FORM_block1 = 0x0a,
DW_FORM_data1 = 0x0b,
DW_FORM_flag = 0x0c,
DW_FORM_sdata = 0x0d,
DW_FORM_strp = 0x0e,
DW_FORM_udata = 0x0f,
DW_FORM_ref_addr = 0x10,
DW_FORM_ref1 = 0x11,
DW_FORM_ref2 = 0x12,
DW_FORM_ref4 = 0x13,
DW_FORM_ref8 = 0x14,
DW_FORM_ref_udata = 0x15,
DW_FORM_indirect = 0x16,
// Operation encodings
DW_OP_addr = 0x03,
DW_OP_deref = 0x06,
DW_OP_const1u = 0x08,
DW_OP_const1s = 0x09,
DW_OP_const2u = 0x0a,
DW_OP_const2s = 0x0b,
DW_OP_const4u = 0x0c,
DW_OP_const4s = 0x0d,
DW_OP_const8u = 0x0e,
DW_OP_const8s = 0x0f,
DW_OP_constu = 0x10,
DW_OP_consts = 0x11,
DW_OP_dup = 0x12,
DW_OP_drop = 0x13,
DW_OP_over = 0x14,
DW_OP_pick = 0x15,
DW_OP_swap = 0x16,
DW_OP_rot = 0x17,
DW_OP_xderef = 0x18,
DW_OP_abs = 0x19,
DW_OP_and = 0x1a,
DW_OP_div = 0x1b,
DW_OP_minus = 0x1c,
DW_OP_mod = 0x1d,
DW_OP_mul = 0x1e,
DW_OP_neg = 0x1f,
DW_OP_not = 0x20,
DW_OP_or = 0x21,
DW_OP_plus = 0x22,
DW_OP_plus_uconst = 0x23,
DW_OP_shl = 0x24,
DW_OP_shr = 0x25,
DW_OP_shra = 0x26,
DW_OP_xor = 0x27,
DW_OP_skip = 0x2f,
DW_OP_bra = 0x28,
DW_OP_eq = 0x29,
DW_OP_ge = 0x2a,
DW_OP_gt = 0x2b,
DW_OP_le = 0x2c,
DW_OP_lt = 0x2d,
DW_OP_ne = 0x2e,
DW_OP_lit0 = 0x30,
DW_OP_lit1 = 0x31,
DW_OP_lit31 = 0x4f,
DW_OP_reg0 = 0x50,
DW_OP_reg1 = 0x51,
DW_OP_reg31 = 0x6f,
DW_OP_breg0 = 0x70,
DW_OP_breg1 = 0x71,
DW_OP_breg31 = 0x8f,
DW_OP_regx = 0x90,
DW_OP_fbreg = 0x91,
DW_OP_bregx = 0x92,
DW_OP_piece = 0x93,
DW_OP_deref_size = 0x94,
DW_OP_xderef_size = 0x95,
DW_OP_nop = 0x96,
DW_OP_push_object_address = 0x97,
DW_OP_call2 = 0x98,
DW_OP_call4 = 0x99,
DW_OP_call_ref = 0x9a,
DW_OP_form_tls_address = 0x9b,
DW_OP_call_frame_cfa = 0x9c,
DW_OP_lo_user = 0xe0,
DW_OP_hi_user = 0xff,
// Encoding attribute values
DW_ATE_address = 0x01,
DW_ATE_boolean = 0x02,
DW_ATE_complex_float = 0x03,
DW_ATE_float = 0x04,
DW_ATE_signed = 0x05,
DW_ATE_signed_char = 0x06,
DW_ATE_unsigned = 0x07,
DW_ATE_unsigned_char = 0x08,
DW_ATE_imaginary_float = 0x09,
DW_ATE_packed_decimal = 0x0a,
DW_ATE_numeric_string = 0x0b,
DW_ATE_edited = 0x0c,
DW_ATE_signed_fixed = 0x0d,
DW_ATE_unsigned_fixed = 0x0e,
DW_ATE_decimal_float = 0x0f,
DW_ATE_lo_user = 0x80,
DW_ATE_hi_user = 0xff,
// Decimal sign attribute values
DW_DS_unsigned = 0x01,
DW_DS_leading_overpunch = 0x02,
DW_DS_trailing_overpunch = 0x03,
DW_DS_leading_separate = 0x04,
DW_DS_trailing_separate = 0x05,
// Endianity attribute values
DW_END_default = 0x00,
DW_END_big = 0x01,
DW_END_little = 0x02,
DW_END_lo_user = 0x40,
DW_END_hi_user = 0xff,
// Accessibility codes
DW_ACCESS_public = 0x01,
DW_ACCESS_protected = 0x02,
DW_ACCESS_private = 0x03,
// Visibility codes
DW_VIS_local = 0x01,
DW_VIS_exported = 0x02,
DW_VIS_qualified = 0x03,
// Virtuality codes
DW_VIRTUALITY_none = 0x00,
DW_VIRTUALITY_virtual = 0x01,
DW_VIRTUALITY_pure_virtual = 0x02,
// Language names
DW_LANG_C89 = 0x0001,
DW_LANG_C = 0x0002,
DW_LANG_Ada83 = 0x0003,
DW_LANG_C_plus_plus = 0x0004,
DW_LANG_Cobol74 = 0x0005,
DW_LANG_Cobol85 = 0x0006,
DW_LANG_Fortran77 = 0x0007,
DW_LANG_Fortran90 = 0x0008,
DW_LANG_Pascal83 = 0x0009,
DW_LANG_Modula2 = 0x000a,
DW_LANG_Java = 0x000b,
DW_LANG_C99 = 0x000c,
DW_LANG_Ada95 = 0x000d,
DW_LANG_Fortran95 = 0x000e,
DW_LANG_PLI = 0x000f,
DW_LANG_ObjC = 0x0010,
DW_LANG_ObjC_plus_plus = 0x0011,
DW_LANG_UPC = 0x0012,
DW_LANG_D = 0x0013,
DW_LANG_lo_user = 0x8000,
DW_LANG_hi_user = 0xffff,
// Identifier case codes
DW_ID_case_sensitive = 0x00,
DW_ID_up_case = 0x01,
DW_ID_down_case = 0x02,
DW_ID_case_insensitive = 0x03,
// Calling convention codes
DW_CC_normal = 0x01,
DW_CC_program = 0x02,
DW_CC_nocall = 0x03,
DW_CC_lo_user = 0x40,
DW_CC_hi_user = 0xff,
// Inline codes
DW_INL_not_inlined = 0x00,
DW_INL_inlined = 0x01,
DW_INL_declared_not_inlined = 0x02,
DW_INL_declared_inlined = 0x03,
// Array ordering
DW_ORD_row_major = 0x00,
DW_ORD_col_major = 0x01,
// Discriminant descriptor values
DW_DSC_label = 0x00,
DW_DSC_range = 0x01,
// Line Number Standard Opcode Encodings
DW_LNS_copy = 0x01,
DW_LNS_advance_pc = 0x02,
DW_LNS_advance_line = 0x03,
DW_LNS_set_file = 0x04,
DW_LNS_set_column = 0x05,
DW_LNS_negate_stmt = 0x06,
DW_LNS_set_basic_block = 0x07,
DW_LNS_const_add_pc = 0x08,
DW_LNS_fixed_advance_pc = 0x09,
DW_LNS_set_prologue_end = 0x0a,
DW_LNS_set_epilogue_begin = 0x0b,
DW_LNS_set_isa = 0x0c,
// Line Number Extended Opcode Encodings
DW_LNE_end_sequence = 0x01,
DW_LNE_set_address = 0x02,
DW_LNE_define_file = 0x03,
DW_LNE_lo_user = 0x80,
DW_LNE_hi_user = 0xff,
// Macinfo Type Encodings
DW_MACINFO_define = 0x01,
DW_MACINFO_undef = 0x02,
DW_MACINFO_start_file = 0x03,
DW_MACINFO_end_file = 0x04,
DW_MACINFO_vendor_ext = 0xff,
// Call frame instruction encodings
DW_CFA_advance_loc = 0x40,
DW_CFA_offset = 0x80,
DW_CFA_restore = 0xc0,
DW_CFA_set_loc = 0x01,
DW_CFA_advance_loc1 = 0x02,
DW_CFA_advance_loc2 = 0x03,
DW_CFA_advance_loc4 = 0x04,
DW_CFA_offset_extended = 0x05,
DW_CFA_restore_extended = 0x06,
DW_CFA_undefined = 0x07,
DW_CFA_same_value = 0x08,
DW_CFA_register = 0x09,
DW_CFA_remember_state = 0x0a,
DW_CFA_restore_state = 0x0b,
DW_CFA_def_cfa = 0x0c,
DW_CFA_def_cfa_register = 0x0d,
DW_CFA_def_cfa_offset = 0x0e,
DW_CFA_def_cfa_expression = 0x0f,
DW_CFA_expression = 0x10,
DW_CFA_offset_extended_sf = 0x11,
DW_CFA_def_cfa_sf = 0x12,
DW_CFA_def_cfa_offset_sf = 0x13,
DW_CFA_val_offset = 0x14,
DW_CFA_val_offset_sf = 0x15,
DW_CFA_val_expression = 0x16,
DW_CFA_lo_user = 0x1c,
DW_CFA_hi_user = 0x3f
};
//===--------------------------------------------------------------------===//
// Forward declarations.

140
llvm/include/llvm/CodeGen/MachineDebugInfo.h
View File

@ -39,6 +39,113 @@
namespace llvm {
// Forward declarations.
class ConstantStruct;
class GlobalVariable;
class Module;
//===----------------------------------------------------------------------===//
/// DebugInfoWrapper - This class is the base class for debug info wrappers.
///
class DebugInfoWrapper {
protected:
GlobalVariable *GV; // "llvm.db" global
ConstantStruct *IC; // Initializer constant.
public:
DebugInfoWrapper(GlobalVariable *G);
/// getGlobal - Return the "llvm.db" global.
///
GlobalVariable *getGlobal() const { return GV; }
/// operator== - Used by Uniquevector to locate entry.
///
bool operator==(const DebugInfoWrapper &DI) const { return IC == DI.IC; }
/// operator< - Used by Uniquevector to locate entry.
///
bool operator<(const DebugInfoWrapper &DI) const { return IC < DI.IC; }
};
//===----------------------------------------------------------------------===//
/// CompileUnitWrapper - This class wraps a "lldb.compile_unit" global to
/// provide easy access to its attributes.
class CompileUnitWrapper : public DebugInfoWrapper {
public:
CompileUnitWrapper(GlobalVariable *G);
/// getGlobal - Return the "lldb.compile_unit" global.
///
GlobalVariable *getGlobal() const { return GV; }
/// getTag - Return the compile unit's tag number. Currently DW_TAG_variable,
/// DW_TAG_subprogram or DW_TAG_compile_unit.
unsigned getTag() const;
/// isCorrectDebugVersion - Return true if is the correct llvm debug version.
/// Currently the value is 0 (zero.) If the value is is not correct then
/// ignore all debug information.
bool isCorrectDebugVersion() const;
/// getLanguage - Return the compile unit's language number (ex. DW_LANG_C89.)
///
unsigned getLanguage() const;
/// getFileName - Return the compile unit's file name.
///
const std::string getFileName() const;
/// getDirectory - Return the compile unit's file directory.
///
const std::string getDirectory() const;
/// getProducer - Return the compile unit's generator name.
///
const std::string getProducer() const;
};
//===----------------------------------------------------------------------===//
/// GlobalWrapper - This class wraps a "lldb.global" global to provide easy
/// access to its attributes.
class GlobalWrapper : public DebugInfoWrapper {
public:
GlobalWrapper(GlobalVariable *G);
/// getGlobal - Return the "lldb.global" global.
///
GlobalVariable *getGlobal() const { return GV; }
/// getContext - Return the "lldb.compile_unit" context global.
///
GlobalVariable *getContext() const;
/// getTag - Return the global's tag number. Currently should be
/// DW_TAG_variable or DW_TAG_subprogram.
unsigned getTag() const;
/// getName - Return the name of the global.
///
const std::string getName() const;
/// getType - Return the type of the global.
///
const GlobalVariable *getType() const;
/// isStatic - Return true if the global is static.
///
bool isStatic() const;
/// isDefinition - Return true if the global is a definition.
///
bool isDefinition() const;
/// getGlobalVariable - Return the global variable (tag == DW_TAG_variable.)
///
GlobalVariable *getGlobalVariable() const;
};
//===----------------------------------------------------------------------===//
/// SourceLineInfo - This class is used to record source line correspondence.
///
@ -94,36 +201,37 @@ public:
///
class MachineDebugInfo : public ImmutablePass {
private:
// DirectoryMap - UniqueVector for directories.
// CompileUnits - Uniquing vector for compile units.
UniqueVector<CompileUnitWrapper> CompileUnits;
// Directories - Uniquing vector for directories.
UniqueVector<std::string> Directories;
// SourceMap - UniqueVector for source files.
// SourceFiles - Uniquing vector for source files.
UniqueVector<SourceFileInfo> SourceFiles;
// Lines - List of of source line correspondence.
std::vector<SourceLineInfo *> Lines;
public:
MachineDebugInfo()
: Directories()
, SourceFiles()
, Lines()
{}
~MachineDebugInfo() { }
MachineDebugInfo();
~MachineDebugInfo();
/// doInitialization - Initialize the debug state for a new module.
///
bool doInitialization();
/// doFinalization - Tear down the debug state after completion of a module.
///
bool doFinalization();
/// hasInfo - Returns true if debug info is present.
/// AnalyzeModule - Scan the module for global debug information.
///
// FIXME - need proper scheme to suppress debug output.
bool hasInfo() const { return !SourceFiles.empty(); }
void AnalyzeModule(Module &M);
/// hasInfo - Returns true if valid debug info is present.
///
bool hasInfo() const { return !CompileUnits.empty(); }
/// RecordLabel - Records location information and associates it with a
/// debug label. Returns a unique label ID used to generate a label and
@ -159,6 +267,14 @@ public:
return Lines;
}
/// SetupCompileUnits - Set up the unique vector of compile units.
///
void MachineDebugInfo::SetupCompileUnits(Module &M);
/// getGlobalVariables - Return a vector of debug global variables.
///
static std::vector<GlobalWrapper> getGlobalVariables(Module &M);
}; // End class MachineDebugInfo
} // End llvm namespace

5
llvm/lib/CodeGen/AsmPrinter.cpp
View File

@ -78,6 +78,11 @@ bool AsmPrinter::doInitialization(Module &M) {
<< "\n" << CommentString << " End of file scope inline assembly\n";
SwitchSection("", 0); // Reset back to no section.
if (MachineDebugInfo *DebugInfo = getAnalysisToUpdate<MachineDebugInfo>()) {
DebugInfo->AnalyzeModule(M);
}
return false;
}

29
llvm/lib/CodeGen/DwarfWriter.cpp
View File

@ -18,6 +18,7 @@
#include "llvm/Type.h"
#include "llvm/CodeGen/AsmPrinter.h"
#include "llvm/CodeGen/MachineDebugInfo.h"
#include "llvm/Support/Dwarf.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Mangler.h"
#include "llvm/Target/TargetMachine.h"
@ -1719,28 +1720,26 @@ void DwarfWriter::ConstructCompileUnitDIEs() {
/// variables.
void DwarfWriter::ConstructGlobalDIEs(Module &M) {
const TargetData &TD = Asm->TM.getTargetData();
// Iterate throu each of the globals.
for (Module::const_global_iterator GI = M.global_begin(), GE = M.global_end();
GI != GE; ++GI) {
if (!GI->hasInitializer()) continue; // External global require no code
std::vector<GlobalWrapper> GlobalVariables = DebugInfo->getGlobalVariables(M);
for (unsigned i = 0, N = GlobalVariables.size(); i < N; ++i) {
GlobalWrapper &GW = GlobalVariables[i];
GlobalVariable *GV = GW.getGlobalVariable();
// Check to see if this is a special global used by LLVM, if so, emit it.
if (GI->hasAppendingLinkage() && (GI->getName() == "llvm.global_ctors" ||
GI->getName() == "llvm.global_dtors"))
continue;
if (!GV->hasInitializer()) continue; // External global require no code
std::string Name = Asm->Mang->getValueName(GI);
Constant *C = GI->getInitializer();
// FIXME - Use global info type information when available.
std::string Name = Asm->Mang->getValueName(GV);
Constant *C = GV->getInitializer();
const Type *Ty = C->getType();
unsigned Size = TD.getTypeSize(Ty);
unsigned Align = TD.getTypeAlignmentShift(Ty);
if (C->isNullValue() && /* FIXME: Verify correct */
(GI->hasInternalLinkage() || GI->hasWeakLinkage() ||
GI->hasLinkOnceLinkage())) {
(GV->hasInternalLinkage() || GV->hasWeakLinkage() ||
GV->hasLinkOnceLinkage())) {
if (Size == 0) Size = 1; // .comm Foo, 0 is undefined, avoid it.
}
/// FIXME - Get correct compile unit context.
@ -1748,7 +1747,7 @@ void DwarfWriter::ConstructGlobalDIEs(Module &M) {
DWContext *Context = CompileUnits[0]->getContext();
/// Create new global.
NewGlobalVariable(Context, GI->getName(), Name, Ty, Size, Align);
NewGlobalVariable(Context, GV->getName(), Name, Ty, Size, Align);
}
}

269
llvm/lib/CodeGen/MachineDebugInfo.cpp
View File

@ -9,6 +9,13 @@
#include "llvm/CodeGen/MachineDebugInfo.h"
#include "llvm/Constants.h"
#include "llvm/DerivedTypes.h"
#include "llvm/Intrinsics.h"
#include "llvm/Instructions.h"
#include "llvm/Module.h"
#include "llvm/Support/Dwarf.h"
using namespace llvm;
// Handle the Pass registration stuff necessary to use TargetData's.
@ -16,8 +23,220 @@ namespace {
RegisterPass<MachineDebugInfo> X("machinedebuginfo", "Debug Information");
}
//===----------------------------------------------------------------------===//
/// getGlobalVariablesUsing - Return all of the global variables which have the
/// specified value in their initializer somewhere.
static void
getGlobalVariablesUsing(Value *V, std::vector<GlobalVariable*> &Result) {
// Scan though value users.
for (Value::use_iterator I = V->use_begin(), E = V->use_end(); I != E; ++I) {
if (GlobalVariable *GV = dyn_cast<GlobalVariable>(*I)) {
// If the user is a global variable then add to result.
Result.push_back(GV);
} else if (Constant *C = dyn_cast<Constant>(*I)) {
// If the user is a constant variable then scan its users
getGlobalVariablesUsing(C, Result);
}
}
}
/// getGlobalVariablesUsing - Return all of the global variables that use the
/// named global variable.
static std::vector<GlobalVariable*>
getGlobalVariablesUsing(Module &M, const std::string &RootName) {
std::vector<GlobalVariable*> Result; // Global variables matching criteria.
// Get the global variable root.
GlobalVariable *UseRoot = M.getGlobalVariable(RootName,
StructType::get(std::vector<const Type*>()));
// If present and linkonce then scan for users.
if (UseRoot && UseRoot->hasLinkOnceLinkage()) {
getGlobalVariablesUsing(UseRoot, Result);
}
return Result;
}
/// getStringValue - Turn an LLVM constant pointer that eventually points to a
/// global into a string value. Return an empty string if we can't do it.
///
const static std::string getStringValue(Value *V, unsigned Offset = 0) {
if (GlobalVariable *GV = dyn_cast<GlobalVariable>(V)) {
if (GV->hasInitializer() && isa<ConstantArray>(GV->getInitializer())) {
ConstantArray *Init = cast<ConstantArray>(GV->getInitializer());
if (Init->isString()) {
std::string Result = Init->getAsString();
if (Offset < Result.size()) {
// If we are pointing INTO The string, erase the beginning...
Result.erase(Result.begin(), Result.begin()+Offset);
// Take off the null terminator, and any string fragments after it.
std::string::size_type NullPos = Result.find_first_of((char)0);
if (NullPos != std::string::npos)
Result.erase(Result.begin()+NullPos, Result.end());
return Result;
}
}
}
} else if (Constant *C = dyn_cast<Constant>(V)) {
if (GlobalValue *GV = dyn_cast<GlobalValue>(C))
return getStringValue(GV, Offset);
else if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
if (CE->getOpcode() == Instruction::GetElementPtr) {
// Turn a gep into the specified offset.
if (CE->getNumOperands() == 3 &&
cast<Constant>(CE->getOperand(1))->isNullValue() &&
isa<ConstantInt>(CE->getOperand(2))) {
return getStringValue(CE->getOperand(0),
Offset+cast<ConstantInt>(CE->getOperand(2))->getRawValue());
}
}
}
}
return "";
}
//===----------------------------------------------------------------------===//
DebugInfoWrapper::DebugInfoWrapper(GlobalVariable *G)
: GV(G)
, IC(dyn_cast<ConstantStruct>(GV->getInitializer())) {
assert(IC && "llvm.db.global is missing structured constant");
}
//===----------------------------------------------------------------------===//
CompileUnitWrapper::CompileUnitWrapper(GlobalVariable *G)
: DebugInfoWrapper(G)
{
// FIXME - should probably ease up on the number of operands (version.)
assert(IC->getNumOperands() == 7 &&
"Compile unit does not have correct number of operands");
}
/// getTag - Return the compile unit's tag number. Currently should be
/// DW_TAG_variable.
unsigned CompileUnitWrapper::getTag() const {
ConstantUInt *CI = dyn_cast<ConstantUInt>(IC->getOperand(0));
assert(CI && "Compile unit tag not an unsigned integer");
return CI->getValue();
}
/// isCorrectDebugVersion - Return true if is the correct llvm debug version.
/// Currently the value is 0 (zero.) If the value is is not correct then
/// ignore all debug information.
bool CompileUnitWrapper::isCorrectDebugVersion() const {
ConstantUInt *CI = dyn_cast<ConstantUInt>(IC->getOperand(1));
assert(CI && "Compile unit debug version not an unsigned integer");
return CI->getValue() == 0;
}
/// getLanguage - Return the compile unit's language number (ex. DW_LANG_C89.)
///
unsigned CompileUnitWrapper::getLanguage() const {
ConstantUInt *CI = dyn_cast<ConstantUInt>(IC->getOperand(2));
assert(CI && "Compile unit language number not an unsigned integer");
return CI->getValue();
}
/// getFileName - Return the compile unit's file name.
///
const std::string CompileUnitWrapper::getFileName() const {
return getStringValue(IC->getOperand(3));
}
/// getDirectory - Return the compile unit's file directory.
///
const std::string CompileUnitWrapper::getDirectory() const {
return getStringValue(IC->getOperand(4));
}
/// getProducer - Return the compile unit's generator name.
///
const std::string CompileUnitWrapper::getProducer() const {
return getStringValue(IC->getOperand(5));
}
//===----------------------------------------------------------------------===//
GlobalWrapper::GlobalWrapper(GlobalVariable *G)
: DebugInfoWrapper(G)
{
// FIXME - should probably ease up on the number of operands (version.)
assert(IC->getNumOperands() == 8 &&
"Global does not have correct number of operands");
}
/// getTag - Return the global's tag number. Currently should be
/// DW_TAG_variable or DW_TAG_subprogram.
unsigned GlobalWrapper::getTag() const {
ConstantUInt *CI = dyn_cast<ConstantUInt>(IC->getOperand(0));
assert(CI && "Global tag not an unsigned integer");
return CI->getValue();
}
/// getContext - Return the "lldb.compile_unit" context global.
///
GlobalVariable *GlobalWrapper::getContext() const {
return dyn_cast<GlobalVariable>(IC->getOperand(1));
}
/// getName - Return the name of the global.
///
const std::string GlobalWrapper::getName() const {
return getStringValue(IC->getOperand(2));
}
/// getType - Return the type of the global.
///
const GlobalVariable *GlobalWrapper::getType() const {
return dyn_cast<GlobalVariable>(IC->getOperand(4));
}
/// isStatic - Return true if the global is static.
///
bool GlobalWrapper::isStatic() const {
ConstantBool *CB = dyn_cast<ConstantBool>(IC->getOperand(5));
assert(CB && "Global static flag is not boolean");
return CB->getValue();
}
/// isDefinition - Return true if the global is a definition.
///
bool GlobalWrapper::isDefinition() const {
ConstantBool *CB = dyn_cast<ConstantBool>(IC->getOperand(6));
assert(CB && "Global definition flag is not boolean");
return CB->getValue();
}
/// getGlobalVariable - Return the global variable (tag == DW_TAG_variable.)
///
GlobalVariable *GlobalWrapper::getGlobalVariable() const {
ConstantExpr *CE = dyn_cast<ConstantExpr>(IC->getOperand(7));
assert(CE && CE->getOpcode() == Instruction::Cast &&
"Global location is not a cast of GlobalVariable");
GlobalVariable *GV = dyn_cast<GlobalVariable>(CE->getOperand(0));
assert(GV && "Global location is not a cast of GlobalVariable");
return GV;
}
//===----------------------------------------------------------------------===//
MachineDebugInfo::MachineDebugInfo()
: CompileUnits()
, Directories()
, SourceFiles()
, Lines()
{
}
MachineDebugInfo::~MachineDebugInfo() {
}
/// doInitialization - Initialize the debug state for a new module.
///
bool MachineDebugInfo::doInitialization() {
@ -29,3 +248,53 @@ bool MachineDebugInfo::doInitialization() {
bool MachineDebugInfo::doFinalization() {
return false;
}
/// AnalyzeModule - Scan the module for global debug information.
///
void MachineDebugInfo::AnalyzeModule(Module &M) {
SetupCompileUnits(M);
}
/// SetupCompileUnits - Set up the unique vector of compile units.
///
void MachineDebugInfo::SetupCompileUnits(Module &M) {
// Get vector of all debug compile units.
std::vector<GlobalVariable*> Globals =
getGlobalVariablesUsing(M, "llvm.dbg.translation_units");
// Scan all compile unit globals.
for (unsigned i = 0, N = Globals.size(); i < N; ++i) {
// Create wrapper for compile unit.
CompileUnitWrapper CUI(Globals[i]);
// Add to result.
if (CUI.isCorrectDebugVersion()) CompileUnits.insert(CUI);
}
// If there any bad compile units then suppress debug information
if (CompileUnits.size() != Globals.size()) CompileUnits.reset();
}
/// getGlobalVariables - Return a vector of debug global variables.
///
std::vector<GlobalWrapper> MachineDebugInfo::getGlobalVariables(Module &M) {
// Get vector of all debug global objects.
std::vector<GlobalVariable*> Globals =
getGlobalVariablesUsing(M, "llvm.dbg.globals");
// Accumulation of global variables.
std::vector<GlobalWrapper> GlobalVariables;
// FIXME - skip until globals have new format
#if 0
// Scan all globals.
for (unsigned i = 0, N = Globals.size(); i < N; ++i) {
// Create wrapper for global.
GlobalWrapper GW(Globals[i]);
// If the global is a variable then add to result.
if (GW.getTag() == DW_TAG_variable) GlobalVariables.push_back(GW);
}
#endif
return GlobalVariables;
}

2
llvm/lib/Target/PowerPC/PPCAsmPrinter.cpp
View File

@ -431,7 +431,7 @@ void PPCAsmPrinter::printMachineInstruction(const MachineInstr *MI) {
/// method to print assembly for each instruction.
///
bool DarwinAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
// FIXME - is this the earliest this can be set.
// FIXME - is this the earliest this can be set?
DW.SetDebugInfo(&getAnalysis<MachineDebugInfo>());
SetupMachineFunction(MF);