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| //===-- OptionArgParser.cpp -------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "lldb/Interpreter/OptionArgParser.h"
#include "lldb/DataFormatters/FormatManager.h"
#include "lldb/Target/Target.h"
#include "lldb/Utility/Status.h"
#include "lldb/Utility/StreamString.h"
using namespace lldb_private;
using namespace lldb;
bool OptionArgParser::ToBoolean(llvm::StringRef ref, bool fail_value,
bool *success_ptr) {
if (success_ptr)
*success_ptr = true;
ref = ref.trim();
if (ref.equals_lower("false") || ref.equals_lower("off") ||
ref.equals_lower("no") || ref.equals_lower("0")) {
return false;
} else if (ref.equals_lower("true") || ref.equals_lower("on") ||
ref.equals_lower("yes") || ref.equals_lower("1")) {
return true;
}
if (success_ptr)
*success_ptr = false;
return fail_value;
}
char OptionArgParser::ToChar(llvm::StringRef s, char fail_value,
bool *success_ptr) {
if (success_ptr)
*success_ptr = false;
if (s.size() != 1)
return fail_value;
if (success_ptr)
*success_ptr = true;
return s[0];
}
int64_t OptionArgParser::ToOptionEnum(llvm::StringRef s,
const OptionEnumValues &enum_values,
int32_t fail_value, Status &error) {
error.Clear();
if (enum_values.empty()) {
error.SetErrorString("invalid enumeration argument");
return fail_value;
}
if (s.empty()) {
error.SetErrorString("empty enumeration string");
return fail_value;
}
for (const auto &enum_value : enum_values) {
llvm::StringRef this_enum(enum_value.string_value);
if (this_enum.startswith(s))
return enum_value.value;
}
StreamString strm;
strm.PutCString("invalid enumeration value, valid values are: ");
bool is_first = true;
for (const auto &enum_value : enum_values) {
strm.Printf("%s\"%s\"",
is_first ? is_first = false,"" : ", ", enum_value.string_value);
}
error.SetErrorString(strm.GetString());
return fail_value;
}
Status OptionArgParser::ToFormat(const char *s, lldb::Format &format,
size_t *byte_size_ptr) {
format = eFormatInvalid;
Status error;
if (s && s[0]) {
if (byte_size_ptr) {
if (isdigit(s[0])) {
char *format_char = nullptr;
unsigned long byte_size = ::strtoul(s, &format_char, 0);
if (byte_size != ULONG_MAX)
*byte_size_ptr = byte_size;
s = format_char;
} else
*byte_size_ptr = 0;
}
const bool partial_match_ok = true;
if (!FormatManager::GetFormatFromCString(s, partial_match_ok, format)) {
StreamString error_strm;
error_strm.Printf(
"Invalid format character or name '%s'. Valid values are:\n", s);
for (Format f = eFormatDefault; f < kNumFormats; f = Format(f + 1)) {
char format_char = FormatManager::GetFormatAsFormatChar(f);
if (format_char)
error_strm.Printf("'%c' or ", format_char);
error_strm.Printf("\"%s\"", FormatManager::GetFormatAsCString(f));
error_strm.EOL();
}
if (byte_size_ptr)
error_strm.PutCString(
"An optional byte size can precede the format character.\n");
error.SetErrorString(error_strm.GetString());
}
if (error.Fail())
return error;
} else {
error.SetErrorStringWithFormat("%s option string", s ? "empty" : "invalid");
}
return error;
}
lldb::ScriptLanguage OptionArgParser::ToScriptLanguage(
llvm::StringRef s, lldb::ScriptLanguage fail_value, bool *success_ptr) {
if (success_ptr)
*success_ptr = true;
if (s.equals_lower("python"))
return eScriptLanguagePython;
if (s.equals_lower("default"))
return eScriptLanguageDefault;
if (s.equals_lower("none"))
return eScriptLanguageNone;
if (success_ptr)
*success_ptr = false;
return fail_value;
}
lldb::addr_t OptionArgParser::ToAddress(const ExecutionContext *exe_ctx,
llvm::StringRef s,
lldb::addr_t fail_value,
Status *error_ptr) {
bool error_set = false;
if (s.empty()) {
if (error_ptr)
error_ptr->SetErrorStringWithFormat("invalid address expression \"%s\"",
s.str().c_str());
return fail_value;
}
llvm::StringRef sref = s;
lldb::addr_t addr = LLDB_INVALID_ADDRESS;
if (!s.getAsInteger(0, addr)) {
if (error_ptr)
error_ptr->Clear();
return addr;
}
// Try base 16 with no prefix...
if (!s.getAsInteger(16, addr)) {
if (error_ptr)
error_ptr->Clear();
return addr;
}
Target *target = nullptr;
if (!exe_ctx || !(target = exe_ctx->GetTargetPtr())) {
if (error_ptr)
error_ptr->SetErrorStringWithFormat("invalid address expression \"%s\"",
s.str().c_str());
return fail_value;
}
lldb::ValueObjectSP valobj_sp;
EvaluateExpressionOptions options;
options.SetCoerceToId(false);
options.SetUnwindOnError(true);
options.SetKeepInMemory(false);
options.SetTryAllThreads(true);
ExpressionResults expr_result =
target->EvaluateExpression(s, exe_ctx->GetFramePtr(), valobj_sp, options);
bool success = false;
if (expr_result == eExpressionCompleted) {
if (valobj_sp)
valobj_sp = valobj_sp->GetQualifiedRepresentationIfAvailable(
valobj_sp->GetDynamicValueType(), true);
// Get the address to watch.
if (valobj_sp)
addr = valobj_sp->GetValueAsUnsigned(fail_value, &success);
if (success) {
if (error_ptr)
error_ptr->Clear();
return addr;
} else {
if (error_ptr) {
error_set = true;
error_ptr->SetErrorStringWithFormat(
"address expression \"%s\" resulted in a value whose type "
"can't be converted to an address: %s",
s.str().c_str(), valobj_sp->GetTypeName().GetCString());
}
}
} else {
// Since the compiler can't handle things like "main + 12" we should try to
// do this for now. The compiler doesn't like adding offsets to function
// pointer types.
static RegularExpression g_symbol_plus_offset_regex(
"^(.*)([-\\+])[[:space:]]*(0x[0-9A-Fa-f]+|[0-9]+)[[:space:]]*$");
llvm::SmallVector<llvm::StringRef, 4> matches;
if (g_symbol_plus_offset_regex.Execute(sref, &matches)) {
uint64_t offset = 0;
std::string name = matches[1].str();
std::string sign = matches[2].str();
std::string str_offset = matches[3].str();
if (!llvm::StringRef(str_offset).getAsInteger(0, offset)) {
Status error;
addr = ToAddress(exe_ctx, name.c_str(), LLDB_INVALID_ADDRESS, &error);
if (addr != LLDB_INVALID_ADDRESS) {
if (sign[0] == '+')
return addr + offset;
else
return addr - offset;
}
}
}
if (error_ptr) {
error_set = true;
error_ptr->SetErrorStringWithFormat(
"address expression \"%s\" evaluation failed", s.str().c_str());
}
}
if (error_ptr) {
if (!error_set)
error_ptr->SetErrorStringWithFormat("invalid address expression \"%s\"",
s.str().c_str());
}
return fail_value;
}
|