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tracing: full reset during init

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I am using the tracing module using the RAM backend on a system with
limited RAM & a buffer that can only store 300ms of tracing data. Current
tracing module starts recording during boot-up & we run out of memory prior
to executing code we actually want to trace.

By reseting buffer metadata here, I can call init() at an arbitrary point
of program execution & the tracing module will reset & start tracing.

I tested on E2E on an ARM M-class MCU by calling init & then reading
buffered tracing data via GDB

Signed-off-by: Galen Krulce <gkrulce@meta.com>
This commit is contained in:
Galen Krulce 2024-04-03 14:39:51 -07:00 committed by Anas Nashif
parent 023248a1f3
commit 1cfe90d825
1 changed files with 2 additions and 0 deletions
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2
subsys/tracing/tracing_backend_ram.c
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@ -35,6 +35,8 @@ static void tracing_backend_ram_output(
static void tracing_backend_ram_init(void) static void tracing_backend_ram_init(void)
{ {
memset(ram_tracing, 0, CONFIG_RAM_TRACING_BUFFER_SIZE); memset(ram_tracing, 0, CONFIG_RAM_TRACING_BUFFER_SIZE);
pos = 0;
buffer_full = false;
} }
const struct tracing_backend_api tracing_backend_ram_api = { const struct tracing_backend_api tracing_backend_ram_api = {