Function report |
Source Code:kernel\trace\trace_event_perf.c |
Create Date:2022-07-28 12:23:27 |
Last Modify:2020-03-17 20:20:33 | Copyright©Brick |
home page | Tree |
Annotation kernel can get tool activity | Download SCCT | Chinese |
Name:perf_trace_buf_alloc
Proto:void *perf_trace_buf_alloc(int size, struct pt_regs **regs, int *rctxp)
Type:void
Parameter:
Type | Parameter | Name |
---|---|---|
int | size | |
struct pt_regs ** | regs | |
int * | rctxp |
400 | BUILD_BUG_ON - break compile if a condition is true(PERF_MAX_TRACE_SIZE % sizeof(unsignedlong)) |
402 | If WARN_ONCE(size > PERF_MAX_TRACE_SIZE, "perf buffer not large enough") Then Return NULL |
406 | rctxp = rctx = perf_swevent_get_recursion_context() |
407 | If rctx < 0 Then Return NULL |
410 | If regs Then regs = this_cpu_ptr( & __perf_regs[rctx]) |
412 | raw_data = this_cpu_ptr(perf_trace_buf[rctx]) |
416 | Return raw_data |
Name | Describe |
---|---|
perf_ftrace_function_call |
Source code conversion tool public plug-in interface | X |
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