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Kernel: Print region name+offset for user addresses in thread backtrace

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This provides more crucial information to be able to do an addr2line
lookup on a backtrace captured with Thread::backtrace.

Also change the offset to hexadecimal as this is what is require for
addr2line.
This commit is contained in:
Tom 2021-07-05 13:30:51 -06:00 committed by Gunnar Beutner
parent 85bd454b48
commit 908f86b061
Notes: sideshowbarker 2024-07-18 10:20:57 +09:00 
Author: https://github.com/tomuta
Commit: https://github.com/SerenityOS/serenity/commit/908f86b0613
Pull-request: https://github.com/SerenityOS/serenity/pull/8472
Reviewed-by: https://github.com/gunnarbeutner ✅
1 changed files with 11 additions and 3 deletions
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14
Kernel/Thread.cpp
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@ -1037,7 +1037,7 @@ struct RecognizedSymbol {
const KernelSymbol* symbol { nullptr };
};
static bool symbolicate(const RecognizedSymbol& symbol, const Process& process, StringBuilder& builder)
static bool symbolicate(RecognizedSymbol const& symbol, Process& process, StringBuilder& builder)
{
if (!symbol.address)
return false;
@ -1047,7 +1047,15 @@ static bool symbolicate(const RecognizedSymbol& symbol, const Process& process,
if (!is_user_address(VirtualAddress(symbol.address))) {
builder.append("0xdeadc0de\n");
} else {
builder.appendff("{:p}\n", symbol.address);
if (auto* region = process.space().find_region_containing({ VirtualAddress(symbol.address), sizeof(FlatPtr) })) {
size_t offset = symbol.address - region->vaddr().get();
if (auto region_name = region->name(); !region_name.is_null() && !region_name.is_empty())
builder.appendff("{:p} {} + 0x{:x}\n", (void*)symbol.address, region_name, offset);
else
builder.appendff("{:p} {:p} + 0x{:x}\n", (void*)symbol.address, region->vaddr().as_ptr(), offset);
} else {
builder.appendff("{:p}\n", symbol.address);
}
}
return true;
}
@ -1055,7 +1063,7 @@ static bool symbolicate(const RecognizedSymbol& symbol, const Process& process,
if (symbol.symbol->address == g_highest_kernel_symbol_address && offset > 4096) {
builder.appendff("{:p}\n", (void*)(mask_kernel_addresses ? 0xdeadc0de : symbol.address));
} else {
builder.appendff("{:p} {} +{}\n", (void*)(mask_kernel_addresses ? 0xdeadc0de : symbol.address), demangle(symbol.symbol->name), offset);
builder.appendff("{:p} {} + 0x{:x}\n", (void*)(mask_kernel_addresses ? 0xdeadc0de : symbol.address), demangle(symbol.symbol->name), offset);
}
return true;
}