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Add evmc.

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This commit is contained in:
chriseth 2019-06-26 23:22:42 +02:00
parent 9955c51769
commit 7401fbabd9
5 changed files with 72 additions and 30 deletions
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4
test/ExecutionFramework.cpp
View File

@ -27,6 +27,10 @@
#include <boost/test/framework.hpp>
#include <boost/algorithm/string/replace.hpp>
#include <test/evmc/evmc.hpp>
#include <test/evmc/loader.h>
#include <test/evmc/helpers.hpp>
#include <cstdlib>
#include <chrono>

8
test/evmc/evmc.h
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@ -974,12 +974,12 @@ struct evmc_instance
evmc_execute_fn execute;
/**
* Pointer to function returning capabilities supported by the VM instance.
* A method returning capabilities supported by the VM instance.
*
* The value returned might change when different options are requested via set_option.
* The value returned MAY change when different options are set via the set_option() method.
*
* A Client SHOULD only rely on the value returned here if it has queried it after
* it has called set_option.
* A Client SHOULD only rely on the value returned if it has queried it after
* it has called the set_option().
*
* This is a mandatory method and MUST NOT be set to NULL.
*/

7
test/evmc/evmc.hpp
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@ -2,6 +2,7 @@
* Copyright 2018-2019 The EVMC Authors.
* Licensed under the Apache License, Version 2.0.
*/
#pragma once
#include <evmc/evmc.h>
#include <evmc/helpers.h>
@ -104,6 +105,12 @@ public:
/// @copydoc evmc_instance::version
char const* version() const noexcept { return m_instance->version; }
/// @copydoc evmc::instance::get_capabilities
evmc_capabilities_flagset get_capabilities() const noexcept
{
return m_instance->get_capabilities(m_instance);
}
/// @copydoc evmc_set_option()
evmc_set_option_result set_option(const char name[], const char value[]) noexcept
{

51
test/evmc/loader.c
View File

@ -42,18 +42,33 @@
#define ATTR_FORMAT(...)
#endif
#if !_WIN32
#if _WIN32
#define strcpy_sx strcpy_s
#else
/*
* Provide strcpy_s() for GNU libc.
* Limited variant of strcpy_s().
*
* Provided for C standard libraries where strcpy_s() is not available.
* The availability check might need to adjusted for other C standard library implementations.
*/
static void strcpy_s(char* dest, size_t destsz, const char* src)
#if !defined(EVMC_LOADER_MOCK)
static
#endif
int
strcpy_sx(char* restrict dest, size_t destsz, const char* restrict src)
{
size_t len = strlen(src);
if (len > destsz - 1)
len = destsz - 1;
if (len >= destsz)
{
// The input src will not fit into the dest buffer.
// Set the first byte of the dest to null to make it effectively empty string
// and return error.
dest[0] = 0;
return 1;
}
memcpy(dest, src, len);
dest[len] = 0;
return 0;
}
#endif
@ -124,7 +139,7 @@ evmc_create_fn evmc_load(const char* filename, enum evmc_loader_error_code* erro
const char prefix[] = "evmc_create_";
const size_t prefix_length = strlen(prefix);
char prefixed_name[sizeof(prefix) + PATH_MAX_LENGTH];
strcpy_s(prefixed_name, sizeof(prefixed_name), prefix);
strcpy_sx(prefixed_name, sizeof(prefixed_name), prefix);
// Find filename in the path.
const char* sep_pos = strrchr(filename, '/');
@ -142,7 +157,7 @@ evmc_create_fn evmc_load(const char* filename, enum evmc_loader_error_code* erro
name_pos += lib_prefix_length;
char* base_name = prefixed_name + prefix_length;
strcpy_s(base_name, PATH_MAX_LENGTH, name_pos);
strcpy_sx(base_name, PATH_MAX_LENGTH, name_pos);
// Trim the file extension.
char* ext_pos = strrchr(prefixed_name, '.');
@ -197,21 +212,29 @@ struct evmc_instance* evmc_load_and_create(const char* filename,
if (!create_fn)
return NULL;
enum evmc_loader_error_code ec = EVMC_LOADER_SUCCESS;
struct evmc_instance* instance = create_fn();
if (!instance)
{
*error_code = set_error(EVMC_LOADER_INSTANCE_CREATION_FAILURE,
"creating EVMC instance of %s has failed", filename);
return NULL;
ec = set_error(EVMC_LOADER_INSTANCE_CREATION_FAILURE,
"creating EVMC instance of %s has failed", filename);
goto exit;
}
if (!evmc_is_abi_compatible(instance))
{
*error_code = set_error(EVMC_LOADER_ABI_VERSION_MISMATCH,
"EVMC ABI version %d of %s mismatches the expected version %d",
instance->abi_version, filename, EVMC_ABI_VERSION);
return NULL;
ec = set_error(EVMC_LOADER_ABI_VERSION_MISMATCH,
"EVMC ABI version %d of %s mismatches the expected version %d",
instance->abi_version, filename, EVMC_ABI_VERSION);
evmc_destroy(instance);
instance = NULL;
goto exit;
}
exit:
if (error_code)
*error_code = ec;
return instance;
}

32
test/evmc/loader.h
View File

@ -44,10 +44,10 @@ enum evmc_loader_error_code
};
/**
* Dynamically loads the shared object (DLL) with an EVM implementation.
* Dynamically loads the EVMC module with a VM implementation.
*
* This function tries to open a DLL at the given `filename`. On UNIX-like systems dlopen() function
* is used. On Windows LoadLibrary() function is used.
* This function tries to open a dynamically loaded library (DLL) at the given `filename`.
* On UNIX-like systems dlopen() function is used. On Windows LoadLibrary() function is used.
*
* If the file does not exist or is not a valid shared library the ::EVMC_LOADER_CANNOT_OPEN error
* code is signaled and NULL is returned.
@ -77,28 +77,36 @@ enum evmc_loader_error_code
* It is safe to call this function with the same filename argument multiple times
* (the DLL is not going to be loaded multiple times).
*
* @param filename The null terminated path (absolute or relative) to the shared library
* containing the EVM implementation. If the value is NULL, an empty C-string
* or longer than the path maximum length the ::EVMC_LOADER_INVALID_ARGUMENT is
* signaled.
* @param filename The null terminated path (absolute or relative) to an EVMC module
* (dynamically loaded library) containing the VM implementation.
* If the value is NULL, an empty C-string or longer than the path maximum length
* the ::EVMC_LOADER_INVALID_ARGUMENT is signaled.
* @param error_code The pointer to the error code. If not NULL the value is set to
* ::EVMC_LOADER_SUCCESS on success or any other error code as described above.
* @return The pointer to the EVM create function or NULL.
* @return The pointer to the EVM create function or NULL in case of error.
*/
evmc_create_fn evmc_load(const char* filename, enum evmc_loader_error_code* error_code);
/**
* Dynamically loads the VM DLL and creates the VM instance.
* Dynamically loads the EVMC module and creates the VM instance.
*
* This is a macro for creating the VM instance with the function returned from evmc_load().
* The function signals the same errors as evmc_load() and additionally:
* - ::EVMC_LOADER_INSTANCE_CREATION_FAILURE when the create function returns NULL,
* - ::EVMC_LOADER_ABI_VERSION_MISMATCH when the created VM instance has ABI version different
* from the ABI version of this library (::EVMC_ABI_VERSION).
* - ::EVMC_LOADER_INSTANCE_CREATION_FAILURE when the create function returns NULL,
* - ::EVMC_LOADER_ABI_VERSION_MISMATCH when the created VM instance has ABI version different
* from the ABI version of this library (::EVMC_ABI_VERSION).
*
* It is safe to call this function with the same filename argument multiple times:
* the DLL is not going to be loaded multiple times, but the function will return new VM instance
* each time.
*
* @param filename The null terminated path (absolute or relative) to an EVMC module
* (dynamically loaded library) containing the VM implementation.
* If the value is NULL, an empty C-string or longer than the path maximum length
* the ::EVMC_LOADER_INVALID_ARGUMENT is signaled.
* @param error_code The pointer to the error code. If not NULL the value is set to
* ::EVMC_LOADER_SUCCESS on success or any other error code as described above.
* @return The pointer to the created VM or NULL in case of error.
*/
struct evmc_instance* evmc_load_and_create(const char* filename,
enum evmc_loader_error_code* error_code);