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backtrace: rework for signal safety

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Mostly, try a lot harder to not allocate anything.

Sponsored-by: Klara, Inc.
Sponsored-by: Wasabi Technology, Inc.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Rob Norris <rob.norris@klarasystems.com>
Closes #16181
This commit is contained in:
Rob Norris
2024-05-10 13:04:14 +10:00
committed by Brian Behlendorf
parent 3974ef045e
commit 1ea8c59441
5 changed files with 68 additions and 31 deletions
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cmd/zdb/zdb.c
+1 -1
View File
@@ -845,7 +845,7 @@ static void sig_handler(int signo)
{
struct sigaction action;
libspl_backtrace();
libspl_backtrace(STDERR_FILENO);
dump_debug_buffer();
/*
cmd/ztest.c
+1 -1
View File
@@ -623,7 +623,7 @@ static void sig_handler(int signo)
{
struct sigaction action;
libspl_backtrace();
libspl_backtrace(STDERR_FILENO);
dump_debug_buffer();
/*