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Improve linker errors #4333

Merged
merged 1 commit into from
Aug 11, 2024
Merged

Improve linker errors #4333

merged 1 commit into from
Aug 11, 2024

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aykevl
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@aykevl aykevl commented Jul 11, 2024 •
edited
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Still working on this one. But basically it turns an error message like this:

$ tinygo run ./linker-undefined.go
ld.lld: error: undefined symbol: main.foo
>>> referenced by linker-undefined.go:6 (/home/ayke/src/tinygo/tinygo/testdata/errors/linker-undefined.go:6)
>>>               /tmp/tinygo2982383139/main.lto.main.o:(runtime.run$1$gowrapper)
>>> referenced by linker-undefined.go:7 (/home/ayke/src/tinygo/tinygo/testdata/errors/linker-undefined.go:7)
>>>               /tmp/tinygo2982383139/main.lto.main.o:(runtime.run$1$gowrapper)
failed to run tool: ld.lld
failed to link /tmp/tinygo2982383139/main: exit status 1

Into this:

$ tinygo run ./linker-undefined.go 
linker-undefined.go:6: linker could not find symbol main.foo
linker-undefined.go:7: linker could not find symbol main.foo

Which I think is far more readable.

(Sadly this doesn't work yet for Windows and WebAssembly because the linkers don't report the source location).

It depends on #4330.

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github-actions bot commented Jul 11, 2024 •
edited
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Size difference with the dev branch:

Binary size difference 
 flash                          ram
 before   after   diff          before   after   diff
  16736   16736      0   0.00%    4308    4308      0   0.00% tinygo build -size short -o ./build/test.hex -target=feather-rp2040 ./examples/adafruit4650
  60248   60248      0   0.00%    6176    6176      0   0.00% tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/adt7410/main.go
   9468    9468      0   0.00%    4740    4740      0   0.00% tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/adxl345/main.go
  13424   13424      0   0.00%    6780    6780      0   0.00% tinygo build -size short -o ./build/test.hex -target=pybadge ./examples/amg88xx
   8580    8580      0   0.00%    4732    4732      0   0.00% tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/apa102/main.go
  11584   11584      0   0.00%    6556    6556      0   0.00% tinygo build -size short -o ./build/test.hex -target=nano-33-ble ./examples/apds9960/proximity/main.go
   9668    9668      0   0.00%    4752    4752      0   0.00% tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/apa102/itsybitsy-m0/main.go
   8196    8196      0   0.00%    2304    2304      0   0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/at24cx/main.go
   8024    8024      0   0.00%    4732    4732      0   0.00% tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/bh1750/main.go
   7332    7332      0   0.00%    4732    4732      0   0.00% tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/blinkm/main.go
  69420   69420      0   0.00%    3628    3628      0   0.00% tinygo build -size short -o ./build/test.hex -target=pinetime     ./examples/bma42x/main.go
  62852   62852      0   0.00%    6176    6176      0   0.00% tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/bmi160/main.go
  27324   27324      0   0.00%    4772    4772      0   0.00% tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/bmp180/main.go
  62848   62848      0   0.00%    6208    6208      0   0.00% tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/bmp280/main.go
  12084   12084      0   0.00%    4804    4804      0   0.00% tinygo build -size short -o ./build/test.hex -target=trinket-m0 ./examples/bmp388/main.go
   8152    8152      0   0.00%    3332    3332      0   0.00% tinygo build -size short -o ./build/test.hex -target=bluepill ./examples/ds1307/sram/main.go
  22064   22064      0   0.00%    3528    3528      0   0.00% tinygo build -size short -o ./build/test.hex -target=bluepill ./examples/ds1307/time/main.go
  68604   68604      0   0.00%    6348    6348      0   0.00% tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/ds3231/main.go
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  68324   68324      0   0.00%    6956    6956      0   0.00% tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/flash/console/spi
  64388   64388      0   0.00%    8996    8996      0   0.00% tinygo build -size short -o ./build/test.hex -target=pyportal ./examples/flash/console/qspi
   7036    7036      0   0.00%    2264    2264      0   0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/gc9a01/main.go
  67436   67436      0   0.00%    6352    6352      0   0.00% tinygo build -size short -o ./build/test.hex -target=feather-m0 ./examples/gps/i2c/main.go
  67964   67964      0   0.00%    6488    6488      0   0.00% tinygo build -size short -o ./build/test.hex -target=feather-m0 ./examples/gps/uart/main.go
   7772    7772      0   0.00%    4732    4732      0   0.00% tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/hcsr04/main.go
   5656    5656      0   0.00%    2264    2264      0   0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/hd44780/customchar/main.go
   5608    5608      0   0.00%    2264    2264      0   0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/hd44780/text/main.go
  10412   10412      0   0.00%    4740    4740      0   0.00% tinygo build -size short -o ./build/test.hex -target=arduino-nano33 ./examples/hd44780i2c/main.go
  14512   14512      0   0.00%    6556    6556      0   0.00% tinygo build -size short -o ./build/test.hex -target=nano-33-ble ./examples/hts221/main.go
  15972   15972      0   0.00%    2344    2344      0   0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/hub75/main.go
  10024   10024      0   0.00%    6900    6900      0   0.00% tinygo build -size short -o ./build/test.hex -target=pyportal ./examples/ili9341/basic
  10544   10544      0   0.00%    4852    4852      0   0.00% tinygo build -size short -o ./build/test.hex -target=xiao ./examples/ili9341/basic
  29400   29400      0   0.00%   38060   38060      0   0.00% tinygo build -size short -o ./build/test.hex -target=pyportal ./examples/ili9341/pyportal_boing
  10044   10044      0   0.00%    6908    6908      0   0.00% tinygo build -size short -o ./build/test.hex -target=pyportal ./examples/ili9341/scroll
  10632   10632      0   0.00%    4860    4860      0   0.00% tinygo build -size short -o ./build/test.hex -target=xiao ./examples/ili9341/scroll
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  11632   11632      0   0.00%    4772    4772      0   0.00% tinygo build -size short -o ./build/test.hex -target=circuitplay-express ./examples/lis3dh/main.go
  13856   13856      0   0.00%    6556    6556      0   0.00% tinygo build -size short -o ./build/test.hex -target=nano-33-ble ./examples/lps22hb/main.go
  25956   25956      0   0.00%    2312    2312      0   0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/lsm303agr/main.go
  12348   12348      0   0.00%    4780    4780      0   0.00% tinygo build -size short -o ./build/test.hex -target=arduino-nano33 ./examples/lsm6ds3/main.go
  10644   10644      0   0.00%    4732    4732      0   0.00% tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/mag3110/main.go
   9820    9820      0   0.00%    4764    4764      0   0.00% tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/mcp23017/main.go
  10256   10256      0   0.00%    4772    4772      0   0.00% tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/mcp23017-multiple/main.go
   9680    9680      0   0.00%    4732    4732      0   0.00% tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/mcp3008/main.go
  67512   67512      0   0.00%    6176    6176      0   0.00% tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/mcp2515/main.go
  26372   26372      0   0.00%    3320    3320      0   0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/microbitmatrix/main.go
  26188   26188      0   0.00%    5364    5364      0   0.00% tinygo build -size short -o ./build/test.hex -target=microbit-v2 ./examples/microbitmatrix/main.go
   8140    8140      0   0.00%    4740    4740      0   0.00% tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/mma8653/main.go
   8048    8048      0   0.00%    4732    4732      0   0.00% tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/mpu6050/main.go
  74780   74780      0   0.00%    7460    7460      0   0.00% tinygo build -size short -o ./build/test.hex -target=p1am-100 ./examples/p1am/main.go
  12132   12132      0   0.00%    3336    3336      0   0.00% tinygo build -size short -o ./build/test.hex -target=pico ./examples/pca9685/main.go
   6052    6052      0   0.00%    3272    3272      0   0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/pcd8544/setbuffer/main.go
   5084    5084      0   0.00%    2264    2264      0   0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/pcd8544/setpixel/main.go
  10404   10404      0   0.00%    3312    3312      0   0.00% tinygo build -size short -o ./build/test.hex -target=feather-rp2040 ./examples/seesaw
   2825    2825      0   0.00%     558     558      0   0.00% tinygo build -size short -o ./build/test.hex -target=arduino ./examples/servo
  13644   13644      0   0.00%    3384    3384      0   0.00% tinygo build -size short -o ./build/test.hex -target=pico     ./examples/sgp30
   7952    7952      0   0.00%    6780    6780      0   0.00% tinygo build -size short -o ./build/test.hex -target=pybadge ./examples/shifter/main.go
  56200   56200      0   0.00%    3668    3668      0   0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/sht3x/main.go
  56264   56264      0   0.00%    3676    3676      0   0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/sht4x/main.go
  56172   56172      0   0.00%    3668    3668      0   0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/shtc3/main.go
   6476    6476      0   0.00%    2272    2272      0   0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/ssd1306/i2c_128x32/main.go
   5924    5924      0   0.00%    2264    2264      0   0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/ssd1306/spi_128x64/main.go
   5672    5672      0   0.00%    2264    2264      0   0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/ssd1331/main.go
   6600    6600      0   0.00%    2264    2264      0   0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/st7735/main.go
   6512    6512      0   0.00%    2264    2264      0   0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/st7789/main.go
  16868   16868      0   0.00%    4732    4732      0   0.00% tinygo build -size short -o ./build/test.hex -target=circuitplay-express ./examples/thermistor/main.go
  10296   10296      0   0.00%    4516    4516      0   0.00% tinygo build -size short -o ./build/test.hex -target=circuitplay-bluefruit ./examples/tone
   9968    9968      0   0.00%    4732    4732      0   0.00% tinygo build -size short -o ./build/test.hex -target=arduino-nano33 ./examples/tm1637/main.go
   9400    9400      0   0.00%    6772    6772      0   0.00% tinygo build -size short -o ./build/test.hex -target=pyportal ./examples/touch/resistive/fourwire/main.go
  12468   12468      0   0.00%    6968    6968      0   0.00% tinygo build -size short -o ./build/test.hex -target=pyportal ./examples/touch/resistive/pyportal_touchpaint/main.go
  14896   14896      0   0.00%    4740    4740      0   0.00% tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/vl53l1x/main.go
  13372   13372      0   0.00%    4740    4740      0   0.00% tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/vl6180x/main.go
   6376    6376      0   0.00%    2304    2304      0   0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/waveshare-epd/epd2in13/main.go
   6004    6004      0   0.00%    2296    2296      0   0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/waveshare-epd/epd2in13x/main.go
   6256    6256      0   0.00%    2304    2304      0   0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/waveshare-epd/epd4in2/main.go
  26320   26320      0   0.00%   16716   16716      0   0.00% tinygo build -size short -o ./build/test.hex -target=pico ./examples/waveshare-epd/epd2in66b/main.go
   6748    6748      0   0.00%    4772    4772      0   0.00% tinygo build -size short -o ./build/test.hex -target=circuitplay-express ./examples/ws2812
   5492    5492      0   0.00%    9502    9502      0   0.00% tinygo build -size short -o ./build/test.bin -target=m5stamp-c3          ./examples/ws2812
  61248   61248      0   0.00%    5928    5928      0   0.00% tinygo build -size short -o ./build/test.hex -target=feather-nrf52840 ./examples/is31fl3731/main.go
   1581    1581      0   0.00%     598     598      0   0.00% tinygo build -size short -o ./build/test.hex -target=arduino   ./examples/ws2812
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  31752   31752      0   0.00%    4772    4772      0   0.00% tinygo build -size short -o ./build/test.hex -target=trinket-m0 ./examples/bme280/main.go
  16356   16356      0   0.00%    4716    4716      0   0.00% tinygo build -size short -o ./build/test.hex -target=circuitplay-express ./examples/microphone/main.go
  10992   10992      0   0.00%    4732    4732      0   0.00% tinygo build -size short -o ./build/test.hex -target=circuitplay-express ./examples/buzzer/main.go
  12700   12700      0   0.00%    4772    4772      0   0.00% tinygo build -size short -o ./build/test.hex -target=trinket-m0 ./examples/veml6070/main.go
   6664    6664      0   0.00%    4732    4732      0   0.00% tinygo build -size short -o ./build/test.hex -target=arduino-nano33 ./examples/l293x/simple/main.go
   8576    8576      0   0.00%    4732    4732      0   0.00% tinygo build -size short -o ./build/test.hex -target=arduino-nano33 ./examples/l293x/speed/main.go
   6632    6632      0   0.00%    4732    4732      0   0.00% tinygo build -size short -o ./build/test.hex -target=arduino-nano33 ./examples/l9110x/simple/main.go
   9184    9184      0   0.00%    4740    4740      0   0.00% tinygo build -size short -o ./build/test.hex -target=arduino-nano33 ./examples/l9110x/speed/main.go
   7284    7284      0   0.00%    3304    3304      0   0.00% tinygo build -size short -o ./build/test.hex -target=nucleo-f103rb ./examples/shiftregister/main.go
   6900    6900      0   0.00%    2252    2252      0   0.00% tinygo build -size short -o ./build/test.hex -target=hifive1b ./examples/ssd1351/main.go
  12904   12904      0   0.00%    4732    4732      0   0.00% tinygo build -size short -o ./build/test.hex -target=circuitplay-express ./examples/lis2mdl/main.go
   8780    8780      0   0.00%    4748    4748      0   0.00% tinygo build -size short -o ./build/test.hex -target=arduino-nano33 ./examples/max72xx/main.go
  76176   76176      0   0.00%    6316    6316      0   0.00% tinygo build -size short -o ./build/test.hex -target=feather-m0 ./examples/dht/main.go
  36320   36320      0   0.00%    3972    3972      0   0.00% tinygo build -size short -o ./build/test.hex -target=feather-rp2040 ./examples/pcf8523/
  70128   70128      0   0.00%    6316    6316      0   0.00% tinygo build -size short -o ./build/test.hex -target=xiao ./examples/pcf8563/alarm/
   7176    7176      0   0.00%    4732    4732      0   0.00% tinygo build -size short -o ./build/test.hex -target=xiao ./examples/pcf8563/clkout/
  69664   69664      0   0.00%    6320    6320      0   0.00% tinygo build -size short -o ./build/test.hex -target=xiao ./examples/pcf8563/time/
  70088   70088      0   0.00%    6324    6324      0   0.00% tinygo build -size short -o ./build/test.hex -target=xiao ./examples/pcf8563/timer/
  12064   12064      0   0.00%    3288    3288      0   0.00% tinygo build -size short -o ./build/test.hex -target=pico ./examples/qmi8658c/main.go
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  71416   71416      0   0.00%   10732   10732      0   0.00% tinygo build -size short -o ./build/test.hex -target=feather-m4 ./examples/sdcard/console/
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  10168   10168      0   0.00%    6780    6780      0   0.00% tinygo build -size short -o ./build/test.elf -target=wioterminal ./examples/axp192/m5stack-core2-blinky/
   8916    8916      0   0.00%    3260    3260      0   0.00% tinygo build -size short -o ./build/test.uf2 -target=pico ./examples/xpt2046/main.go
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  64648   64648      0   0.00%    4764    4764      0   0.00% tinygo build -size short -o ./build/test.uf2 -target=pico ./examples/mcp9808/main.go
  88392   88392      0   0.00%    6076    6076      0   0.00% tinygo build -size short -o ./build/test.hex -target=challenger-rp2040 ./examples/net/ntpclient/
 291480  291480      0   0.00%   12508   12508      0   0.00% tinygo build -size short -o ./build/test.hex -target=pyportal -stack-size 8kb ./examples/net/http-get/
 116788  116788      0   0.00%    7744    7744      0   0.00% tinygo build -size short -o ./build/test.hex -target=arduino-nano33 -stack-size 8kb ./examples/net/tcpclient/
 240256  240256      0   0.00%    9264    9264      0   0.00% tinygo build -size short -o ./build/test.hex -target=nano-rp2040 -stack-size 8kb ./examples/net/websocket/dial/
 100960  100960      0   0.00%    9728    9728      0   0.00% tinygo build -size short -o ./build/test.hex -target=metro-m4-airlift -stack-size 8kb ./examples/net/socket/
 332216  332216      0   0.00%   15504   15504      0   0.00% tinygo build -size short -o ./build/test.hex -target=matrixportal-m4 -stack-size 8kb ./examples/net/webstatic/
 108484  108484      0   0.00%    7516    7516      0   0.00% tinygo build -size short -o ./build/test.hex -target=arduino-mkrwifi1010 -stack-size 8kb ./examples/net/tlsclient/
 152772  152772      0   0.00%    6428    6428      0   0.00% tinygo build -size short -o ./build/test.hex -target=nano-rp2040 -stack-size 8kb ./examples/net/mqttclient/natiu/
 113892  113892      0   0.00%   12868   12868      0   0.00% tinygo build -size short -o ./build/test.hex -target=wioterminal -stack-size 8kb ./examples/net/webclient/
 281308  281308      0   0.00%   17928   17928      0   0.00% tinygo build -size short -o ./build/test.hex -target=wioterminal -stack-size 8kb ./examples/net/webserver/
 282700  282700      0   0.00%   16988   16988      0   0.00% tinygo build -size short -o ./build/test.hex -target=wioterminal -stack-size 8kb ./examples/net/mqttclient/paho/
5193862 5193862      0   0.00%  780030  780030      0   0.00%

@aykevl
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aykevl commented Jul 21, 2024 •
edited
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Updated. It now depends on #4354 to work correctly.

It also shows nice error messages when the binary size is too large.
Old error:

$ tinygo flash -target=microbit ./testdata/errors/linker-flashoverflow.go 
ld.lld: error: section '.text' will not fit in region 'FLASH_TEXT': overflowed by 264852 bytes
ld.lld: error: section '.tinygo_stacksizes' will not fit in region 'FLASH_TEXT': overflowed by 264856 bytes
ld.lld: error: section '.data' will not fit in region 'FLASH_TEXT': overflowed by 264860 bytes
failed to run tool: ld.lld
failed to link /tmp/tinygo228367794/main: exit status 1

New error:

$ tinygo flash -target=microbit ./testdata/errors/linker-flashoverflow.go
program too large for this chip (flash overflowed by 264860 bytes)
        optimization guide: https://tinygo.org/docs/guides/optimizing-binaries/

@aykevl aykevl force-pushed the improve-linker-errors branch 2 times, most recently from 221272d to c8dea7c Compare July 22, 2024 13:13
@aykevl aykevl marked this pull request as ready for review July 22, 2024 13:13
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aykevl commented Jul 22, 2024

Ready for review.

@deadprogram
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@aykevl please check CI errors on this PR.

@aykevl
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aykevl commented Aug 3, 2024

Pushed a fix, hopefully.

@aykevl aykevl marked this pull request as draft August 7, 2024 14:35
@aykevl
builder: interpret linker error messages
8cefde1 
This shows nicely formatted error messages for missing symbol names and
for out-of-flash, out-of-RAM conditions (on microcontrollers with
limited flash/RAM).

Unfortunately the missing symbol name errors aren't available on Windows
and WebAssembly because the linker doesn't report source locations yet.
This is something that I could perhaps improve in LLD.
@aykevl aykevl marked this pull request as ready for review August 7, 2024 15:20
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aykevl commented Aug 7, 2024

Pushed a working fix, hopefully (one that I actually tested instead of just guessing).

@deadprogram
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This is definitely an improvement, thanks for working on it @aykevl

@deadprogram deadprogram merged commit 2e76cd3 into dev Aug 11, 2024
22 of 25 checks passed
@deadprogram deadprogram deleted the improve-linker-errors branch August 11, 2024 08:48
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@aykevl @deadprogram