Hello, This is a continuation of the data type profiling series. Now the basic part (v3) which uses pointer variables is merged to the perf-tools-next tree. And this part is for memory accesses without pointers as well as small updates to handle some corner cases. Still mores to come to complete the original series. There's no change from the previous version. For background and usages, pleaes refer the posting of previous version [1] and a LWN article [2]. Basically most memory accesses happen with pointers, but there are cases don't use pointers - direct accesses to global and local variables. Global variables are located in a static memory at a specific address. So the DWARF location expression for the global vairable would also have the static address. And it's common to access them using PC-relative addressing mode. Thus it needs a special handling for global variables. On the other hand, local variables are located in the stack which varies as program executes. So the local variables are accessed either by the (stack) frame pointer or (current) stack pointer. But sometimes DWARF location expression uses a frame base address (CFA) to specify location of local variables. So it may need to convert or normalize the location extracted from the instruction to match DWARF expression. Lastly, there are some cases DWARF location expressions end up having complex (or not straight-forward) location. In that case, it cannot simply match just the first expression with the instruction location. It'd be safer to reject them. The code is available at 'perf/data-profile-update-v4' branch in the tree below. The full version of the code is in 'perf/data-profile-v4' branch. git://git.kernel.org/pub/scm/linux/kernel/git/namhyung/linux-perf.git Thanks, Namhyung Cc: Ben Woodard <woodard@xxxxxxxxxx> Cc: Joe Mario <jmario@xxxxxxxxxx> CC: Kees Cook <keescook@xxxxxxxxxxxx> Cc: David Blaikie <blaikie@xxxxxxxxxx> Cc: Xu Liu <xliuprof@xxxxxxxxxx> Cc: Kan Liang <kan.liang@xxxxxxxxxxxxxxx> Cc: Ravi Bangoria <ravi.bangoria@xxxxxxx> Cc: Mark Wielaard <mark@xxxxxxxxx> Cc: Jason Merrill <jason@xxxxxxxxxx> Cc: Jose E. Marchesi <jose.marchesi@xxxxxxxxxx> Cc: William Huang <williamjhuang@xxxxxxxxxx> [1] https://lore.kernel.org/linux-perf-users/20231213001323.718046-1-namhyung@xxxxxxxxxx/ [2] https://lwn.net/Articles/955709/ Namhyung Kim (9): perf annotate-data: Parse 'lock' prefix from llvm-objdump perf annotate-data: Handle macro fusion on x86 perf annotate-data: Handle array style accesses perf annotate-data: Add stack operation pseudo type perf annotate-data: Handle PC-relative addressing perf annotate-data: Support global variables perf dwarf-aux: Add die_get_cfa() perf annotate-data: Support stack variables perf dwarf-aux: Check allowed DWARF Ops tools/perf/util/annotate-data.c | 119 ++++++++++++++++---- tools/perf/util/annotate-data.h | 8 +- tools/perf/util/annotate.c | 153 ++++++++++++++++++++++++-- tools/perf/util/annotate.h | 12 +- tools/perf/util/dwarf-aux.c | 187 ++++++++++++++++++++++++++++---- tools/perf/util/dwarf-aux.h | 18 +++ 6 files changed, 439 insertions(+), 58 deletions(-) base-commit: d988c9f511af71a3445b6a4f3a2c67208ff8e480 -- 2.43.0.381.gb435a96ce8-goog
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