429334cf98
We at one point considered making `ModuleBuilder` create complete WebAssembly binaries. However, we recently spun out [wabin](https://github.com/tetratelabs/wabin), which allows this. Meanwhile, the features in `ModuleBuilder` were confusing and misused. For example, the only two cases memory was exported on GitHub were done by accident. This is because host functions act on the guest's memory, not their own. Hence, this removes memory and globals from host side definitions, and renames the type to HostModuleBuilder to clarify this is not ever going to be used to construct normal Wasm binaries. Most importantly, this simplifies the API and reduces a lot of code. It is important to make changes like this, particularly deleting any experimental things that didn't end up useful. Signed-off-by: Adrian Cole <adrian@tetrate.io> Co-authored-by: Anuraag Agrawal <anuraaga@gmail.com>
62 lines
2.0 KiB
Go
62 lines
2.0 KiB
Go
package wazero
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import (
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_ "embed"
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"testing"
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"github.com/tetratelabs/wazero/internal/testing/require"
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)
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// TestRuntime_Namespace ensures namespaces are independent.
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func TestRuntime_Namespace(t *testing.T) {
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r := NewRuntime(testCtx)
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defer r.Close(testCtx)
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// Compile a module to add to the runtime
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compiled, err := r.NewHostModuleBuilder("env").Compile(testCtx)
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require.NoError(t, err)
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// Instantiate "env" into the runtime default namespace (base case)
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require.Nil(t, r.Module("env"))
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m1, err := r.InstantiateModule(testCtx, compiled, NewModuleConfig())
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require.NoError(t, err)
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require.Equal(t, m1, r.Module("env"))
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// NewNamespace does not inherit modules in the default namespace
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ns1 := r.NewNamespace(testCtx)
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require.Nil(t, ns1.Module("env"))
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// Ensure this namespace has a new instance of "env"
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m2, err := ns1.InstantiateModule(testCtx, compiled, NewModuleConfig())
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require.NoError(t, err)
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require.NotSame(t, m1, m2)
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// Ensure the next namespace is similarly independent.
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ns2 := r.NewNamespace(testCtx)
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m3, err := ns2.InstantiateModule(testCtx, compiled, NewModuleConfig())
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require.NoError(t, err)
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require.NotSame(t, m1, m3)
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require.NotSame(t, m2, m3)
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// Ensure we can't re-instantiate the same module multiple times.
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_, err = ns2.InstantiateModule(testCtx, compiled, NewModuleConfig())
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require.EqualError(t, err, "module[env] has already been instantiated")
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// Ensure we can instantiate the same module multiple times.
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m4, err := ns2.InstantiateModule(testCtx, compiled, NewModuleConfig().WithName("env2"))
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require.NoError(t, err)
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require.NotSame(t, m3, m4)
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// Ensure closing one namespace doesn't affect another
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require.NoError(t, ns2.Close(testCtx))
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require.Nil(t, ns2.Module("env"))
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require.Nil(t, ns2.Module("env2"))
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require.Equal(t, m1, r.Module("env"))
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require.Equal(t, m2, ns1.Module("env"))
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// Ensure closing the Runtime closes all namespaces
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require.NoError(t, r.Close(testCtx))
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require.Nil(t, r.Module("env"))
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require.Nil(t, ns1.Module("env"))
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}
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