Re: [PATCH v7 22/36] function_graph: Add a new entry handler with parent_ip and ftrace_regs
From: Steven Rostedt <rostedt@goodmis.org>
Date: 2024-02-15 15:36:56
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On Wed, 7 Feb 2024 00:11:34 +0900 "Masami Hiramatsu (Google)" [off-list ref] wrote:
From: Masami Hiramatsu (Google) <mhiramat@kernel.org> Add a new entry handler to fgraph_ops as 'entryregfunc' which takes parent_ip and ftrace_regs. Note that the 'entryfunc' and 'entryregfunc' are mutual exclusive. You can set only one of them. Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org> ---
quoted hunk ↗ jump to hunk
#ifdef CONFIG_FUNCTION_GRAPH_TRACER@@ -1070,6 +1075,7 @@ extern int ftrace_graph_entry_stub(struct ftrace_graph_ent *trace, struct fgraph struct fgraph_ops { trace_func_graph_ent_t entryfunc; trace_func_graph_ret_t retfunc; + trace_func_graph_regs_ent_t entryregfunc;
if entryfunc and entryregfunc are mutually exclusive, then why not make them
into a union?
struct fgraph_ops {
union {
trace_func_graph_ent_t entryfunc;
trace_func_graph_regs_ent_t entryregfunc;
};
trace_func_graph_ret_t retfunc;
-- Steve
struct ftrace_ops ops; /* for the hash lists */ void *private; int idx;