1 % PT_INSN_ALLOC_DECODER(3)
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33 pt_insn_alloc_decoder, pt_insn_free_decoder - allocate/free an Intel(R)
34 Processor Trace instruction flow decoder
39 | **\#include `<intel-pt.h>`**
41 | **struct pt_insn_decoder \***
42 | **pt_insn_alloc_decoder(const struct pt_config \**config*);**
44 | **void pt_insn_free_decoder(struct pt_insn_decoder \**decoder*);**
51 An instruction flow decoder decodes raw Intel Processor Trace (Intel PT) into a
52 sequence of instructions described by the *pt_insn* structure. See
55 **pt_insn_alloc_decoder**() allocates a new instruction flow decoder and returns
56 a pointer to it. The *config* argument points to a *pt_config* object. See
57 **pt_config**(3). The *config* argument will not be referenced by the returned
58 decoder but the trace buffer defined by the *config* argument's *begin* and
61 The returned instruction flow decoder needs to be synchronized onto the trace
62 stream before it can be used. To synchronize the instruction flow decoder, use
63 **pt_insn_sync_forward**(3), **pt_insn_sync_backward**(3), or
64 **pt_insn_sync_set**(3).
66 **pt_insn_free_decoder**() frees the Intel PT instruction flow decoder pointed
67 to by *decoder*. The *decoder* argument must be NULL or point to a decoder that
68 has been allocated by a call to **pt_insn_alloc_decoder**().
73 **pt_insn_alloc_decoder**() returns a pointer to a *pt_insn_decoder* object on
74 success or NULL in case of an error.
80 int foo(const struct pt_config *config) {
81 struct pt_insn_decoder *decoder;
84 decoder = pt_insn_alloc_decoder(config);
88 errcode = bar(decoder);
90 pt_insn_free_decoder(decoder);
98 **pt_config**(3), **pt_insn_sync_forward**(3), **pt_insn_sync_backward**(3),
99 **pt_insn_sync_set**(3), **pt_insn_get_offset**(3), **pt_insn_get_sync_offset**(3),
100 **pt_insn_get_image**(3), **pt_insn_set_image**(3), **pt_insn_get_config**(3),
101 **pt_insn_time**(3), **pt_insn_core_bus_ratio**(3), **pt_insn_next**(3)