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trace: make call depth limit customizable

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Up to now we had hard coded values for the call depth up to which trace
records are created: 200 for early tracing, 15 thereafter. UEFI
applications reach a call depth of 80 or above.

Provide customizing settings for the call trace depth limit and the early
call trace depth limit. Use the old values as defaults.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Heinrich Schuchardt 2019-06-02 13:30:09 +02:00 committed by Simon Glass
parent a2fa38da20
commit da0fb5fdd4
2 changed files with 17 additions and 2 deletions
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15
lib/Kconfig
View File

@ -192,6 +192,13 @@ config TRACE_BUFFER_SIZE
the size is too small then 'trace stats' will show a message saying
how many records were dropped due to buffer overflow.
config TRACE_CALL_DEPTH_LIMIT
int "Trace call depth limit"
depends on TRACE
default 15
help
Sets the maximum call depth up to which function calls are recorded.
config TRACE_EARLY
bool "Enable tracing before relocation"
depends on TRACE
@ -209,6 +216,14 @@ config TRACE_EARLY_SIZE
Sets the size of the early trace buffer in bytes. This is used to hold
tracing information before relocation.
config TRACE_EARLY_CALL_DEPTH_LIMIT
int "Early trace call depth limit"
depends on TRACE_EARLY
default 200
help
Sets the maximum call depth up to which function calls are recorded
during early tracing.
config TRACE_EARLY_ADDR
hex "Address of early trace buffer in U-Boot"
depends on TRACE_EARLY

4
lib/trace.c
View File

@ -376,7 +376,7 @@ int __attribute__((no_instrument_function)) trace_init(void *buff,
add_textbase();
puts("trace: enabled\n");
hdr->depth_limit = 15;
hdr->depth_limit = CONFIG_TRACE_CALL_DEPTH_LIMIT;
trace_enabled = 1;
trace_inited = 1;
@ -410,7 +410,7 @@ int __attribute__((no_instrument_function)) trace_early_init(void)
hdr->ftrace = (struct trace_call *)((char *)hdr + needed);
hdr->ftrace_size = (buff_size - needed) / sizeof(*hdr->ftrace);
add_textbase();
hdr->depth_limit = 200;
hdr->depth_limit = CONFIG_TRACE_EARLY_CALL_DEPTH_LIMIT;
printf("trace: early enable at %08x\n", CONFIG_TRACE_EARLY_ADDR);
trace_enabled = 1;