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Reading/writing goto binaries: consistently use return values #7643

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5 changes: 2 additions & 3 deletions src/goto-analyzer/static_simplifier.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -190,7 +190,6 @@ bool static_simplifier(
goto_model.goto_functions.update();

m.status() << "Writing goto binary" << messaget::eom;
return write_goto_binary(out,
ns.get_symbol_table(),
goto_model.goto_functions);
return write_goto_binary(
out, ns.get_symbol_table(), goto_model.goto_functions, message_handler);
}
2 changes: 1 addition & 1 deletion src/goto-cc/compile.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -601,7 +601,7 @@ bool compilet::write_bin_object_file(
return true;
}

if(write_goto_binary(outfile, src_goto_model))
if(write_goto_binary(outfile, src_goto_model, message_handler))
return true;

const auto cnt = function_body_count(src_goto_model.goto_functions);
Expand Down
9 changes: 7 additions & 2 deletions src/goto-harness/goto_harness_parse_options.cpp
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Expand Up @@ -163,8 +163,13 @@ int goto_harness_parse_optionst::doit()
}
else
{
write_goto_binary(
got_harness_config.out_file, goto_model, log.get_message_handler());
if(write_goto_binary(
got_harness_config.out_file, goto_model, log.get_message_handler()))
{
throw deserialization_exceptiont{
"failed to write goto program to file '" + got_harness_config.out_file +
"'"};
}
}

return CPROVER_EXIT_SUCCESS;
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2 changes: 1 addition & 1 deletion src/goto-programs/read_bin_goto_object.h
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Expand Up @@ -21,7 +21,7 @@ class symbol_table_baset;
class goto_functionst;
class message_handlert;

bool read_bin_goto_object(
[[nodiscard]] bool read_bin_goto_object(
std::istream &in,
const std::string &filename,
symbol_table_baset &symbol_table,
Expand Down
2 changes: 1 addition & 1 deletion src/goto-programs/read_goto_binary.h
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Expand Up @@ -29,7 +29,7 @@ bool is_goto_binary(const std::string &filename, message_handlert &);
/// \param [out] dest: GOTO model to update.
/// \param message_handler: for diagnostics
/// \return True on error, false otherwise
bool read_objects_and_link(
[[nodiscard]] bool read_objects_and_link(
const std::list<std::string> &file_names,
goto_modelt &dest,
message_handlert &message_handler);
Expand Down
26 changes: 16 additions & 10 deletions src/goto-programs/write_goto_binary.cpp
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Expand Up @@ -11,14 +11,13 @@ Author: CM Wintersteiger

#include "write_goto_binary.h"

#include <fstream>

#include <util/exception_utils.h>
#include <util/irep_serialization.h>
#include <util/message.h>

#include <goto-programs/goto_model.h>

#include <fstream>

/// Writes the symbol table to file.
static void write_symbol_table_binary(
std::ostream &out,
Expand Down Expand Up @@ -144,12 +143,14 @@ static void write_goto_binary(
bool write_goto_binary(
std::ostream &out,
const goto_modelt &goto_model,
message_handlert &message_handler,
int version)
{
return write_goto_binary(
out,
goto_model.symbol_table,
goto_model.goto_functions,
message_handler,
version);
}

Expand All @@ -158,6 +159,7 @@ bool write_goto_binary(
std::ostream &out,
const symbol_table_baset &symbol_table,
const goto_functionst &goto_functions,
message_handlert &message_handler,
int version)
{
// header
Expand All @@ -169,15 +171,19 @@ bool write_goto_binary(

if(version < GOTO_BINARY_VERSION)
{
throw invalid_command_line_argument_exceptiont(
"version " + std::to_string(version) + " no longer supported",
"supported version = " + std::to_string(GOTO_BINARY_VERSION));
messaget message{message_handler};
message.error() << "version " << version << " no longer supported; "
<< "supported version = " << GOTO_BINARY_VERSION
<< messaget::eom;
return true;
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Is this an improvement?

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Using return values rather than exceptions? I'd argue yes for two reasons:

  1. It is consistent across reading (which already did this) and writing (which now does this) goto binaries.
  2. Using return values to communicate errors makes it easier to build (cross-language) APIs.

}
if(version > GOTO_BINARY_VERSION)
{
throw invalid_command_line_argument_exceptiont(
"unknown goto binary version " + std::to_string(version),
"supported version = " + std::to_string(GOTO_BINARY_VERSION));
messaget message{message_handler};
message.error() << "unknown goto binary version " << version << "; "
<< "supported version = " << GOTO_BINARY_VERSION
<< messaget::eom;
return true;
}
write_goto_binary(out, symbol_table, goto_functions, irepconverter);
return false;
Expand All @@ -198,5 +204,5 @@ bool write_goto_binary(
return true;
}

return write_goto_binary(out, goto_model);
return write_goto_binary(out, goto_model, message_handler);
}
10 changes: 6 additions & 4 deletions src/goto-programs/write_goto_binary.h
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Expand Up @@ -22,18 +22,20 @@ class goto_modelt;
class message_handlert;
class symbol_table_baset;

bool write_goto_binary(
[[nodiscard]] bool write_goto_binary(
std::ostream &out,
const goto_modelt &,
int version=GOTO_BINARY_VERSION);
message_handlert &,
int version = GOTO_BINARY_VERSION);

bool write_goto_binary(
[[nodiscard]] bool write_goto_binary(
std::ostream &out,
const symbol_table_baset &,
const goto_functionst &,
message_handlert &,
int version = GOTO_BINARY_VERSION);

bool write_goto_binary(
[[nodiscard]] bool write_goto_binary(
const std::string &filename,
const goto_modelt &,
message_handlert &);
Expand Down
2 changes: 1 addition & 1 deletion src/symtab2gb/symtab2gb_parse_options.cpp
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Expand Up @@ -105,7 +105,7 @@ static void run_symtab2gb(
linked_goto_model.symbol_table.swap(linked_symbol_table);
goto_convert(linked_goto_model, message_handler);

if(failed(write_goto_binary(out_file, linked_goto_model)))
if(failed(write_goto_binary(out_file, linked_goto_model, message_handler)))
{
throw system_exceptiont{"failed to write goto binary to " + gb_filename};
}
Expand Down
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