Memory-drainAllocationsLog-03.js

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// Test when there are more allocations than the maximum log length.

const root = newGlobal({newCompartment: true});

const dbg = new Debugger();

dbg.addDebuggee(root)

dbg.memory.maxAllocationsLogLength = 3;

dbg.memory.trackingAllocationSites = true;

root.eval([

  "this.alloc1 = {};", // line 1

  "this.alloc2 = {};", // line 2

  "this.alloc3 = {};", // line 3

  "this.alloc4 = {};", // line 4

].join("\n"));

const allocs = dbg.memory.drainAllocationsLog();

// Should have stayed at the maximum length.

assertEq(allocs.length, 3);

// Should have kept the most recent allocation.

assertEq(allocs[2].frame.line, 4);

// Should have thrown away the oldest allocation.

assertEq(allocs.map(x => x.frame.line).indexOf(1), -1);