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transform: add debug information to internal/task.stackSize

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This has two benefits:
 1. It attributes these bytes to the internal/task package (in
    -size=full), instead of (unknown).
 2. It makes it possible to print the stack sizes variable in GDB.

This is what it might look like in GDB:

    (gdb) p 'internal/task.stackSizes'
    $13 = {344, 120, 80, 2048, 360, 112, 80, 120, 2048, 2048}
This commit is contained in:
Ayke van Laethem
2023-03-06 17:28:41 +01:00
committed by Ron Evans
parent 3701e6eac1
commit 71be24e4f9
2 changed files with 43 additions and 1 deletions
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transform/testdata/stacksize.out.ll
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@@ -1,7 +1,7 @@
target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
target triple = "armv7m-none-eabi"
@"internal/task.stackSizes" = global [1 x i32] [i32 1024], section ".tinygo_stacksizes"
@"internal/task.stackSizes" = global [1 x i32] [i32 1024], section ".tinygo_stacksizes", align 4
@llvm.used = appending global [2 x i8*] [i8* bitcast ([1 x i32]* @"internal/task.stackSizes" to i8*), i8* bitcast (void (i8*)* @"runtime.run$1$gowrapper" to i8*)]
declare i32 @"internal/task.getGoroutineStackSize"(i32, i8*, i8*)