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gg: allow for -d gg_memory_trace_frame to be used in combination with -prealloc -d prealloc_dump

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Delyan Angelov 2025-06-26 12:20:16 +03:00
parent 388413a2c8
commit c03d7d1cb2
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1 changed files with 16 additions and 0 deletions
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16
vlib/gg/gg.c.v
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@ -339,6 +339,7 @@ fn gg_frame_fn(mut ctx Context) {
} }
ctx.record_frame() ctx.record_frame()
ctx.memory_trace_frame()
if ctx.ui_mode && !ctx.needs_refresh { if ctx.ui_mode && !ctx.needs_refresh {
// println('ui mode, exiting') // println('ui mode, exiting')
@ -884,3 +885,18 @@ pub fn wait_events() {
} }
} }
*/ */
// memory_trace_frame creates a small allocation at the start of each frame,
// that is easy to search for in memdump.bin files, created with:
// -prealloc -d prealloc_memset -d prealloc_memset_value=65 -d prealloc_dump -d gg_memory_trace_frame
@[if gg_memory_trace_frame ?; manualfree]
fn (mut ctx Context) memory_trace_frame() {
frame_tag_size := 61 // uneven, and easy to spot in heaptrack histograms as well
unsafe {
frame_tag := &u8(vcalloc(frame_tag_size))
C.snprintf(frame_tag, frame_tag_size, c'@@ gg_memory_trace_frame: %06d ', ctx.frame)
frame_tag[frame_tag_size - 2] = `@`
frame_tag[frame_tag_size - 1] = `@`
free(frame_tag)
}
}