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libsysprof-context: skip context switches at head of trace

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We can get stack traces which have a USER at the end, or KERNEL at the
end, and nothing after it. Not really useful to us.
This commit is contained in:
Christian Hergert
2023-05-25 11:13:10 -07:00
parent 81672f191b
commit f79a3c6d2e
1 changed files with 10 additions and 0 deletions
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10
src/libsysprof-analyze/sysprof-callgraph.c
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@ -158,6 +158,16 @@ sysprof_callgraph_add_trace (SysprofCallgraph *self,
parent = &self->root; parent = &self->root;
/* If the first thing we see is a context switch, then there is
* nothing after it to account for. Just skip the symbol as it
* provides nothing to us in the callgraph.
*/
if (_sysprof_symbol_is_context_switch (symbols[0]))
{
symbols++;
n_symbols--;
}
for (guint i = n_symbols - 1; i > 0; i--) for (guint i = n_symbols - 1; i > 0; i--)
{ {
SysprofSymbol *symbol = symbols[i-1]; SysprofSymbol *symbol = symbols[i-1];