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pagemap-cache: add an ability to run tests without PAGEMAP_SCAN

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This change adds a new injectable fault (135) to disable PAGEMAP_SCAN and fault
back to read pagemap files.

Signed-off-by: Andrei Vagin <avagin@gmail.com>
This commit is contained in:
Andrei Vagin
2023-11-29 23:25:44 +00:00
parent cb64d73ada
commit afc0efcf78
2 changed files with 3 additions and 1 deletions
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1
criu/include/fault-injection.h
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@@ -19,6 +19,7 @@ enum faults {
FI_HUGE_ANON_SHMEM_ID = 132, FI_HUGE_ANON_SHMEM_ID = 132,
FI_CANNOT_MAP_VDSO = 133, FI_CANNOT_MAP_VDSO = 133,
FI_CORRUPT_EXTREGS = 134, FI_CORRUPT_EXTREGS = 134,
FI_DONT_USE_PAGEMAP_SCAN = 135,
FI_MAX, FI_MAX,
}; };

3
criu/pagemap-cache.c
View File

@@ -11,6 +11,7 @@
#include "vma.h" #include "vma.h"
#include "mem.h" #include "mem.h"
#include "kerndat.h" #include "kerndat.h"
#include "fault-injection.h"
#undef LOG_PREFIX #undef LOG_PREFIX
#define LOG_PREFIX "pagemap-cache: " #define LOG_PREFIX "pagemap-cache: "
@@ -61,7 +62,7 @@ int pmc_init(pmc_t *pmc, pid_t pid, const struct list_head *vma_head, size_t siz
pmc->regs = NULL; pmc->regs = NULL;
pmc->map = NULL; pmc->map = NULL;
if (kdat.has_pagemap_scan) { if (kdat.has_pagemap_scan && !fault_injected(FI_DONT_USE_PAGEMAP_SCAN)) {
pmc->regs = xmalloc(pmc->regs_max_len * sizeof(struct page_region)); pmc->regs = xmalloc(pmc->regs_max_len * sizeof(struct page_region));
if (!pmc->regs) if (!pmc->regs)
goto err; goto err;