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fix for https://github.com/Xahau/xahaud/issues/5

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This commit is contained in:
Richard Holland
2023-02-07 09:18:46 +00:00
parent 192308fb3e
commit 307f9702ea
1 changed files with 20 additions and 14 deletions
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34
src/ripple/app/hook/applyHook.h
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@@ -473,7 +473,17 @@ namespace hook
WasmEdge_VMDelete(ctx);
}
};
// if an error occured return a string prefixed with `prefix` followed by the error description
static std::optional<std::string> getWasmError(std::string prefix, WasmEdge_Result& res)
{
if (WasmEdge_ResultOK(res))
return {};
const char* msg = WasmEdge_ResultGetMessage(res);
return prefix + ": " + (msg ? msg : "unknown error");
}
/**
* Validate that a web assembly blob can be loaded by wasmedge
*/
@@ -487,13 +497,13 @@ namespace hook
WasmEdge_Result res =
WasmEdge_VMLoadWasmFromBuffer(vm.ctx, reinterpret_cast<const uint8_t*>(wasm), len);
if (!WasmEdge_ResultOK(res))
return "VMLoadWasmFromBuffer failed";
if (auto err = getWasmError("VMLoadWasmFromBuffer failed", res); err)
return *err;
res = WasmEdge_VMValidate(vm.ctx);
if (!WasmEdge_ResultOK(res))
return "VMValidate failed";
if (auto err = getWasmError("VMValidate failed", res); err)
return *err;
return {};
}
@@ -529,13 +539,11 @@ namespace hook
}
WasmEdge_Result res = WasmEdge_VMRegisterModuleFromImport(vm.ctx, this->importObj);
if (!WasmEdge_ResultOK(res))
if (auto err = getWasmError("Import phase failed", res); err)
{
hookCtx.result.exitType = hook_api::ExitType::WASM_ERROR;
JLOG(j.trace())
<< "HookError[" << HC_ACC() << "]: Import phase failed "
<< WasmEdge_ResultGetMessage(res);
hookCtx.result.exitType = hook_api::ExitType::WASM_ERROR;
JLOG(j.trace()) << "HookError[" << HC_ACC() << "]: " << *err;
return;
}
@@ -547,11 +555,9 @@ namespace hook
callback ? cbakFunctionName : hookFunctionName,
params, 1, returns, 1);
if (!WasmEdge_ResultOK(res))
if (auto err = getWasmError("WASM VM error", res); err)
{
JLOG(j.warn())
<< "HookError[" << HC_ACC() << "]: WASM VM error "
<< WasmEdge_ResultGetMessage(res);
JLOG(j.warn()) << "HookError[" << HC_ACC() << "]: " << *err;
hookCtx.result.exitType = hook_api::ExitType::WASM_ERROR;
return;
}