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munmap can fail.

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According to munmap(2), the call can fail, e.g if the adress given is
not at a page boundary.
This commit is contained in:
Tobias Frost 2022-06-22 15:15:14 +02:00
parent 61a32cf95e
commit f090e95e83
1 changed files with 9 additions and 4 deletions
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9
report.c
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@ -294,10 +294,14 @@ static void _report_mmap64(struct task *task, struct library_symbol *libsym)
report_alloc(task, MT_MMAP64, ret, size.l, options.bt_depth, libsym); report_alloc(task, MT_MMAP64, ret, size.l, options.bt_depth, libsym);
} }
static void report_munmap(struct task *task, struct library_symbol *libsym) static void _report_munmap(struct task *task, struct library_symbol *libsym)
{ {
unsigned long addr = fetch_param(task, 0); unsigned long addr = fetch_param(task, 0);
unsigned long size = fetch_param(task, 1); unsigned long size = fetch_param(task, 1);
unsigned long ret = fetch_retval(task);
if(ret != 0 ) return;
if(unlikely(arch_pagesize==-1)) arch_pagesize=getpagesize(); if(unlikely(arch_pagesize==-1)) arch_pagesize=getpagesize();
// fixup size, if needed: all pages in [addr, addr+size] are unmapped -- see munmap(2) // fixup size, if needed: all pages in [addr, addr+size] are unmapped -- see munmap(2)
@ -308,6 +312,7 @@ static void report_munmap(struct task *task, struct library_symbol *libsym)
report_alloc(task, MT_MUNMAP, addr, size, 0, libsym); report_alloc(task, MT_MUNMAP, addr, size, 0, libsym);
} }
static void _report_memalign(struct task *task, struct library_symbol *libsym) static void _report_memalign(struct task *task, struct library_symbol *libsym)
{ {
unsigned long size = fetch_param(task, 1); unsigned long size = fetch_param(task, 1);
@ -388,7 +393,7 @@ static const struct function flist[] = {
{ "posix_memalign", "posix_memalign", 0, NULL, _report_posix_memalign }, { "posix_memalign", "posix_memalign", 0, NULL, _report_posix_memalign },
{ "mmap", "mmap", 0, NULL, _report_mmap }, { "mmap", "mmap", 0, NULL, _report_mmap },
{ "mmap64", "mmap64", 1, NULL, _report_mmap64 }, { "mmap64", "mmap64", 1, NULL, _report_mmap64 },
{ "munmap", "munmap", 0, report_munmap, NULL }, { "munmap", "munmap", 0, NULL, _report_munmap },
{ "memalign", "memalign", 0, NULL, _report_memalign }, { "memalign", "memalign", 0, NULL, _report_memalign },
{ "aligned_alloc", "aligned_alloc", 1, NULL, _report_aligned_alloc }, { "aligned_alloc", "aligned_alloc", 1, NULL, _report_aligned_alloc },
{ "valloc", "valloc", 1, NULL, _report_valloc }, { "valloc", "valloc", 1, NULL, _report_valloc },