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55 lines
1.5 KiB
55 lines
1.5 KiB
name: duk_inspect_callstack_entry
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proto: |
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void duk_inspect_callstack_entry(duk_context *ctx, duk_int_t level);
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stack: |
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[ ... ] -> [ ... info! ]
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summary: |
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<p>Inspect callstack entry at <code>level</code> and push an object
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containing Duktape specific internal information about the entry.
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The level argument must be negative and mimics the value stack
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index convention: -1 is the most recent (innermost) call, -2 is its
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caller, and so on. If the level argument is invalid (e.g. outside of
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current callstack) <code>undefined</code> is pushed instead.</p>
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<div include="inspect-versioning-guarantees.html" />
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<p>The following table summarizes current properties.</p>
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<table>
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<thead>
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<tr><th>Property</th><th>Description</th></tr>
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</thead>
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<tbody>
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<tr>
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<td class="propname">function</td>
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<td>Function being executed. Note that this is a potential sandboxing
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concern if exposed to untrusted code.</td>
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</tr>
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<tr>
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<td class="propname">pc</td>
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<td>Program counter for Ecmascript functions. Zero if executing a native
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function.</td>
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</tr>
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<tr>
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<td class="propname">lineNumber</td>
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<td>Line number for Ecmascript functions. Zero if executing a native
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function or if pc-to-line translation data is not available.</td>
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</tr>
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</tbody>
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</table>
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example: |
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duk_inspect_callstack_entry(ctx, -3);
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duk_get_prop_string(ctx, -1, "lineNumber");
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printf("immediate caller is executing on line %ld\n", (long) duk_to_int(ctx, -1));
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duk_pop_2(ctx);
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tags:
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- stack
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- inspect
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introduced: 2.0.0
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