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| author | Ilya Leoshkevich <iii@linux.ibm.com> | 2023-01-12 16:20:13 +0100 |
|---|---|---|
| committer | Richard Henderson <richard.henderson@linaro.org> | 2023-01-16 10:14:12 -1000 |
| commit | 5584e2dbe8c9c95ceb178786fb88e5edf625e1b6 (patch) | |
| tree | 6b117636e203be8e4246aa30704d784243e4deee /linux-user | |
| parent | 7c10cb38ccb86a0e56fff32bb348aa4b34e17e10 (diff) | |
| download | qemu-5584e2dbe8c9c95ceb178786fb88e5edf625e1b6.zip qemu-5584e2dbe8c9c95ceb178786fb88e5edf625e1b6.tar.gz qemu-5584e2dbe8c9c95ceb178786fb88e5edf625e1b6.tar.bz2 | |
tcg: add perfmap and jitdump
Add ability to dump /tmp/perf-<pid>.map and jit-<pid>.dump.
The first one allows the perf tool to map samples to each individual
translation block. The second one adds the ability to resolve symbol
names, line numbers and inspect JITed code.
Example of use:
perf record qemu-x86_64 -perfmap ./a.out
perf report
or
perf record -k 1 qemu-x86_64 -jitdump ./a.out
DEBUGINFOD_URLS= perf inject -j -i perf.data -o perf.data.jitted
perf report -i perf.data.jitted
Co-developed-by: Vanderson M. do Rosario <vandersonmr2@gmail.com>
Co-developed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Message-Id: <20230112152013.125680-4-iii@linux.ibm.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Diffstat (limited to 'linux-user')
| -rw-r--r-- | linux-user/exit.c | 2 | ||||
| -rw-r--r-- | linux-user/main.c | 15 |
2 files changed, 17 insertions, 0 deletions
diff --git a/linux-user/exit.c b/linux-user/exit.c index fa6ef0b..607b6da 100644 --- a/linux-user/exit.c +++ b/linux-user/exit.c @@ -17,6 +17,7 @@ * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #include "qemu/osdep.h" +#include "accel/tcg/perf.h" #include "exec/gdbstub.h" #include "qemu.h" #include "user-internals.h" @@ -38,4 +39,5 @@ void preexit_cleanup(CPUArchState *env, int code) #endif gdb_exit(code); qemu_plugin_user_exit(); + perf_exit(); } diff --git a/linux-user/main.c b/linux-user/main.c index a17fed0..4290651 100644 --- a/linux-user/main.c +++ b/linux-user/main.c @@ -53,6 +53,7 @@ #include "signal-common.h" #include "loader.h" #include "user-mmap.h" +#include "accel/tcg/perf.h" #ifdef CONFIG_SEMIHOSTING #include "semihosting/semihost.h" @@ -423,6 +424,16 @@ static void handle_arg_abi_call0(const char *arg) } #endif +static void handle_arg_perfmap(const char *arg) +{ + perf_enable_perfmap(); +} + +static void handle_arg_jitdump(const char *arg) +{ + perf_enable_jitdump(); +} + static QemuPluginList plugins = QTAILQ_HEAD_INITIALIZER(plugins); #ifdef CONFIG_PLUGIN @@ -493,6 +504,10 @@ static const struct qemu_argument arg_table[] = { {"xtensa-abi-call0", "QEMU_XTENSA_ABI_CALL0", false, handle_arg_abi_call0, "", "assume CALL0 Xtensa ABI"}, #endif + {"perfmap", "QEMU_PERFMAP", false, handle_arg_perfmap, + "", "Generate a /tmp/perf-${pid}.map file for perf"}, + {"jitdump", "QEMU_JITDUMP", false, handle_arg_jitdump, + "", "Generate a jit-${pid}.dump file for perf"}, {NULL, NULL, false, NULL, NULL, NULL} }; |