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Fix TXM JIT page count rounding

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Stephen 2026-04-12 02:24:41 -04:00
parent 842055322c
commit e521810b6d
1 changed files with 12 additions and 5 deletions
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17
StikJIT/JSSupport/JSDebugSupport.swift
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@ -94,8 +94,15 @@ private func writeChecksum(into buffer: inout [UInt8], at startIndex: Int) {
buffer[index + 2] = hexCharacter(for: checksum & 0x0f)
}
private func makeBulkWriteCommands(startAddress: UInt64, pageSize: UInt64) -> [UInt8] {
let commandCount = Int(pageSize >> 14)
private let jitPageSize: UInt64 = 16_384
private func jitPageCount(for regionSize: UInt64) -> Int {
guard regionSize > 0 else { return 0 }
return Int(((regionSize - 1) / jitPageSize) + 1)
}
private func makeBulkWriteCommands(startAddress: UInt64, regionSize: UInt64) -> [UInt8] {
let commandCount = jitPageCount(for: regionSize)
var buffer = [UInt8](repeating: 0, count: commandCount * 19)
var currentAddress = startAddress
@ -111,7 +118,7 @@ private func makeBulkWriteCommands(startAddress: UInt64, pageSize: UInt64) -> [U
buffer[start + 15] = Character("9").asciiValue!
buffer[start + 16] = Character("#").asciiValue!
writeChecksum(into: &buffer, at: start + 1)
currentAddress += 16_384
currentAddress += jitPageSize
}
return buffer
@ -123,8 +130,8 @@ func handleJITPageWrite(_ context: JSContext?, _ startAddr: UInt64, _ jitPagesSi
return nil
}
let commandBuffer = makeBulkWriteCommands(startAddress: startAddr, pageSize: jitPagesSize)
let commandCount = Int(jitPagesSize >> 14)
let commandBuffer = makeBulkWriteCommands(startAddress: startAddr, regionSize: jitPagesSize)
let commandCount = jitPageCount(for: jitPagesSize)
let commandsPerBatch = 128
for batchStart in stride(from: 0, to: commandCount, by: commandsPerBatch) {