softonik/tinygo
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stacksize: hardcode some more frame sizes for __aeabi_* functions

Просмотр исходного кода 
These functions are defined in compiler-rt in assembly and therefore
don't have stack size information. However, they're often called so
these missing functions often inhibit stack size calculation.

Example, before:

    $ tinygo build -o test.elf -target=cortex-m-qemu -print-stacks ./testdata/float.go
    function                         stack usage (in bytes)
    Reset_Handler                    unknown, __aeabi_memclr does not have stack frame information
    runtime.run$1                    unknown, __aeabi_dcmpgt does not have stack frame information

After:

    $ tinygo build -o test.elf -target=cortex-m-qemu -print-stacks ./testdata/float.go
    function                         stack usage (in bytes)
    Reset_Handler                    260
    runtime.run$1                    224
Этот коммит содержится в:
Ayke van Laethem 2021-11-01 22:03:01 +01:00 • коммит произвёл Ron Evans
родитель 5792f3a1cf
коммит 02ef64f012
1 изменённых файлов: 18 добавлений и 0 удалений
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18
stacksize/stacksize.go
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@ -201,7 +201,25 @@ func CallGraph(f *elf.File, callsIndirectFunction []string) (map[string][]*CallN
case elf.EM_ARM: case elf.EM_ARM:
knownFrameSizes := map[string]uint64{ knownFrameSizes := map[string]uint64{
// implemented with assembly in compiler-rt // implemented with assembly in compiler-rt
"__aeabi_idivmod": 3 * 4, // 3 registers on thumb1 but 1 register on thumb2
"__aeabi_uidivmod": 3 * 4, // 3 registers on thumb1 but 1 register on thumb2 "__aeabi_uidivmod": 3 * 4, // 3 registers on thumb1 but 1 register on thumb2
"__aeabi_ldivmod": 2 * 4,
"__aeabi_uldivmod": 2 * 4,
"__aeabi_memclr": 2 * 4, // 2 registers on thumb1
"__aeabi_memset": 2 * 4, // 2 registers on thumb1
"__aeabi_memcmp": 2 * 4, // 2 registers on thumb1
"__aeabi_memcpy": 2 * 4, // 2 registers on thumb1
"__aeabi_memmove": 2 * 4, // 2 registers on thumb1
"__aeabi_dcmpeq": 2 * 4,
"__aeabi_dcmplt": 2 * 4,
"__aeabi_dcmple": 2 * 4,
"__aeabi_dcmpge": 2 * 4,
"__aeabi_dcmpgt": 2 * 4,
"__aeabi_fcmpeq": 2 * 4,
"__aeabi_fcmplt": 2 * 4,
"__aeabi_fcmple": 2 * 4,
"__aeabi_fcmpge": 2 * 4,
"__aeabi_fcmpgt": 2 * 4,
} }
for name, size := range knownFrameSizes { for name, size := range knownFrameSizes {
if sym, ok := symbolNames[name]; ok { if sym, ok := symbolNames[name]; ok {