From 729719d373de31fce77b32341b01476ca53f98c8 Mon Sep 17 00:00:00 2001 From: Greg Banks Date: Tue, 4 Jan 2005 05:41:45 -0800 Subject: [PATCH] oprofile: arch-independent code for stack trace sampling oprofile arch-independent updates, including some internal API changes and support for stack trace sampling. Signed-off-by: John Levon Signed-off-by: Greg Banks Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/oprofile.h | 20 +++++++++++++++----- 1 file changed, 15 insertions(+), 5 deletions(-) (limited to 'include/linux') diff --git a/include/linux/oprofile.h b/include/linux/oprofile.h index f17c89c37c72..d6a47c85e603 100644 --- a/include/linux/oprofile.h +++ b/include/linux/oprofile.h @@ -20,6 +20,7 @@ struct super_block; struct dentry; struct file_operations; +struct pt_regs; /* Operations structure to be filled in */ struct oprofile_operations { @@ -34,6 +35,8 @@ struct oprofile_operations { int (*start)(void); /* Stop delivering interrupts. */ void (*stop)(void); + /* Initiate a stack backtrace. Optional. */ + void (*backtrace)(struct pt_regs * const regs, unsigned int depth); /* CPU identification string. */ char * cpu_type; }; @@ -41,11 +44,11 @@ struct oprofile_operations { /** * One-time initialisation. *ops must be set to a filled-in * operations structure. This is called even in timer interrupt - * mode. + * mode so an arch can set a backtrace callback. * - * Return 0 on success. + * If an error occurs, the fields should be left untouched. */ -int oprofile_arch_init(struct oprofile_operations ** ops); +void oprofile_arch_init(struct oprofile_operations * ops); /** * One-time exit/cleanup for the arch. @@ -56,8 +59,15 @@ void oprofile_arch_exit(void); * Add a sample. This may be called from any context. Pass * smp_processor_id() as cpu. */ -extern void oprofile_add_sample(unsigned long eip, unsigned int is_kernel, - unsigned long event, int cpu); +void oprofile_add_sample(struct pt_regs * const regs, unsigned long event); + +/* Use this instead when the PC value is not from the regs. Doesn't + * backtrace. */ +void oprofile_add_pc(unsigned long pc, int is_kernel, unsigned long event); + +/* add a backtrace entry, to be called from the ->backtrace callback */ +void oprofile_add_trace(unsigned long eip); + /** * Create a file of the given name as a child of the given root, with -- cgit v1.2.3