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Hi, |
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I am trying SystemTap - a tool for dynamic tracing on Gentoo and I have |
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some troubles to make it working. I followed the guide on |
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|
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https://sourceware.org/systemtap/wiki/SystemTapWithSelfBuiltKernel |
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|
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and built the kernel with required options: |
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|
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zgrep -E |
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'CONFIG_DEBUG_INFO|CONFIG_KPROBES|CONFIG_RELAY|CONFIG_DEBUG_FS|CONFIG_MODULES|CONFIG_MODULE_UNLOAD|CONFIG_UPROBES|CONFIG_DEBUG_INFO' |
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/proc/config.gz |
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CONFIG_RELAY=y |
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CONFIG_KPROBES=y |
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CONFIG_UPROBES=y |
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CONFIG_MODULES_USE_ELF_RELA=y |
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CONFIG_MODULES=y |
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CONFIG_MODULE_UNLOAD=y |
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CONFIG_DEBUG_INFO=y |
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# CONFIG_DEBUG_INFO_REDUCED is not set |
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# CONFIG_DEBUG_INFO_SPLIT is not set |
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CONFIG_DEBUG_INFO_DWARF4=y |
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CONFIG_DEBUG_FS=y |
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# CONFIG_KPROBES_SANITY_TEST is not set |
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|
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But even the simplest check fails on: |
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|
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stap -r /usr/src/linux -v -e 'probe vfs.read {printf("read performed\n"); |
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exit()}' |
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Pass 1: parsed user script and 122 library script(s) using |
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214692virt/125980res/5604shr/122476data kb, in 450usr/20sys/464real ms. |
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Pass 2: analyzed script: 1 probe(s), 1 function(s), 3 embed(s), 0 global(s) |
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using 347656virt/260520res/6984shr/255440data kb, in |
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1210usr/250sys/1462real ms. |
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Pass 3: translated to C into |
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"/tmp/stap2nY7sY/stap_9aad5fb97c53bb7c4bc51dce0ccbb236_1259_src.c" using |
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347656virt/260772res/7236shr/255440data kb, in 0usr/0sys/4real ms. |
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In file included from /usr/share/systemtap/runtime/linux/task_finder.c:17:0, |
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from /usr/share/systemtap/runtime/linux/runtime.h:206, |
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from /usr/share/systemtap/runtime/runtime.h:24, |
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from |
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/tmp/stap2nY7sY/stap_9aad5fb97c53bb7c4bc51dce0ccbb236_1259_src.c:24: |
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/usr/share/systemtap/runtime/linux/task_finder2.c: In function |
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'__stp_call_mmap_callbacks_with_addr': |
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/usr/share/systemtap/runtime/linux/task_finder2.c:695:24: error: 'struct |
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file' has no member named 'f_dentry' |
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dentry = vma->vm_file->f_dentry; |
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^ |
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/usr/share/systemtap/runtime/linux/task_finder2.c: In function |
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'__stp_call_mmap_callbacks_for_task': |
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/usr/share/systemtap/runtime/linux/task_finder2.c:1198:42: error: 'struct |
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file' has no member named 'f_dentry' |
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vma_cache_p->dentry = vma->vm_file->f_dentry; |
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^ |
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scripts/Makefile.build:258: recipe for target |
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'/tmp/stap2nY7sY/stap_9aad5fb97c53bb7c4bc51dce0ccbb236_1259_src.o' failed |
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make[1]: *** |
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[/tmp/stap2nY7sY/stap_9aad5fb97c53bb7c4bc51dce0ccbb236_1259_src.o] Error 1 |
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Makefile:1390: recipe for target '_module_/tmp/stap2nY7sY' failed |
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make: *** [_module_/tmp/stap2nY7sY] Error 2 |
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WARNING: kbuild exited with status: 2 |
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Pass 4: compiled C into "stap_9aad5fb97c53bb7c4bc51dce0ccbb236_1259.ko" in |
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3230usr/260sys/4290real ms. |
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Pass 4: compilation failed. [man error::pass4] |
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|
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I am wondering now - is there anything wrong with my aproach? Does anyone |
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succesfully use SystemTap on Gentoo? And if so, could you help me to make |
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this running? |
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|
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Lukas |
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