)]}'
{
  "commit": "f3f096cfedf8113380c56fc855275cc75cd8cf55",
  "tree": "b8d0553afc8cebf6dd320d094206e93df5d95794",
  "parents": [
    "8ab83f56475ec9151645a888dfe1941f4a92091d"
  ],
  "author": {
    "name": "Srikar Dronamraju",
    "email": "srikar@linux.vnet.ibm.com",
    "time": "Wed Apr 11 16:00:43 2012 +0530"
  },
  "committer": {
    "name": "Ingo Molnar",
    "email": "mingo@kernel.org",
    "time": "Mon May 07 14:30:17 2012 +0200"
  },
  "message": "tracing: Provide trace events interface for uprobes\n\nImplements trace_event support for uprobes. In its current form\nit can be used to put probes at a specified offset in a file and\ndump the required registers when the code flow reaches the\nprobed address.\n\nThe following example shows how to dump the instruction pointer\nand %ax a register at the probed text address.  Here we are\ntrying to probe zfree in /bin/zsh:\n\n # cd /sys/kernel/debug/tracing/\n # cat /proc/`pgrep  zsh`/maps | grep /bin/zsh | grep r-xp\n 00400000-0048a000 r-xp 00000000 08:03 130904 /bin/zsh\n # objdump -T /bin/zsh | grep -w zfree\n 0000000000446420 g    DF .text  0000000000000012  Base\n zfree # echo \u0027p /bin/zsh:0x46420 %ip %ax\u0027 \u003e uprobe_events\n # cat uprobe_events\n p:uprobes/p_zsh_0x46420 /bin/zsh:0x0000000000046420\n # echo 1 \u003e events/uprobes/enable\n # sleep 20\n # echo 0 \u003e events/uprobes/enable\n # cat trace\n # tracer: nop\n #\n #           TASK-PID    CPU#    TIMESTAMP  FUNCTION\n #              | |       |          |         |\n              zsh-24842 [006] 258544.995456: p_zsh_0x46420: (0x446420) arg1\u003d446421 arg2\u003d79\n              zsh-24842 [007] 258545.000270: p_zsh_0x46420: (0x446420) arg1\u003d446421 arg2\u003d79\n              zsh-24842 [002] 258545.043929: p_zsh_0x46420: (0x446420) arg1\u003d446421 arg2\u003d79\n              zsh-24842 [004] 258547.046129: p_zsh_0x46420: (0x446420) arg1\u003d446421 arg2\u003d79\n\nSigned-off-by: Srikar Dronamraju \u003csrikar@linux.vnet.ibm.com\u003e\nAcked-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\nAcked-by: Masami Hiramatsu \u003cmasami.hiramatsu.pt@hitachi.com\u003e\nCc: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\nCc: Ananth N Mavinakayanahalli \u003cananth@in.ibm.com\u003e\nCc: Jim Keniston \u003cjkenisto@linux.vnet.ibm.com\u003e\nCc: Linux-mm \u003clinux-mm@kvack.org\u003e\nCc: Oleg Nesterov \u003coleg@redhat.com\u003e\nCc: Andi Kleen \u003candi@firstfloor.org\u003e\nCc: Christoph Hellwig \u003chch@infradead.org\u003e\nCc: Arnaldo Carvalho de Melo \u003cacme@infradead.org\u003e\nCc: Anton Arapov \u003canton@redhat.com\u003e\nCc: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nLink: http://lkml.kernel.org/r/20120411103043.GB29437@linux.vnet.ibm.com\nSigned-off-by: Ingo Molnar \u003cmingo@kernel.org\u003e\n",
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